sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/bus.h>
  35 #include <sys/systm.h>
  36 #include <sys/types.h>
  37 #include <sys/malloc.h>
  38 #include <sys/kernel.h>
  39 #include <sys/time.h>
  40 #include <sys/conf.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/interrupt.h>
  43 #include <sys/sbuf.h>
  44 #include <sys/taskqueue.h>
  45
  46 #include <sys/lock.h>
  47 #include <sys/mutex.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/kthread.h>
  50
  51 #include <cam/cam.h>
  52 #include <cam/cam_ccb.h>
  53 #include <cam/cam_periph.h>
  54 #include <cam/cam_queue.h>
  55 #include <cam/cam_sim.h>
  56 #include <cam/cam_xpt.h>
  57 #include <cam/cam_xpt_sim.h>
  58 #include <cam/cam_xpt_periph.h>
  59 #include <cam/cam_xpt_internal.h>
  60 #include <cam/cam_debug.h>
  61 #include <cam/cam_compat.h>
  62
  63 #include <cam/scsi/scsi_all.h>
  64 #include <cam/scsi/scsi_message.h>
  65 #include <cam/scsi/scsi_pass.h>
  66
  67 #include <machine/md_var.h>     /* geometry translation */
  68 #include <machine/stdarg.h>     /* for xpt_print below */
  69
  70 #include "opt_cam.h"
  71
  72 /*
  73  * This is the maximum number of high powered commands (e.g. start unit)
  74  * that can be outstanding at a particular time.
  75  */
  76 #ifndef CAM_MAX_HIGHPOWER
  77 #define CAM_MAX_HIGHPOWER  4
  78 #endif
  79
  80 /* Datastructures internal to the xpt layer */
  81 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  82 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  83 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  84 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  85
  86 /* Object for defering XPT actions to a taskqueue */
  87 struct xpt_task {
  88         struct task     task;
  89         void            *data1;
  90         uintptr_t       data2;
  91 };
  92
  93 typedef enum {
  94         XPT_FLAG_OPEN           = 0x01
  95 } xpt_flags;
  96
  97 struct xpt_softc {
  98         xpt_flags               flags;
  99
 100         /* number of high powered commands that can go through right now */
 101         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 102         int                     num_highpower;
 103
 104         /* queue for handling async rescan requests. */
 105         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 106         int buses_to_config;
 107         int buses_config_done;
 108
 109         /* Registered busses */
 110         TAILQ_HEAD(,cam_eb)     xpt_busses;
 111         u_int                   bus_generation;
 112
 113         struct intr_config_hook *xpt_config_hook;
 114
 115         int                     boot_delay;
 116         struct callout          boot_callout;
 117
 118         struct mtx              xpt_topo_lock;
 119         struct mtx              xpt_lock;
 120 };
 121
 122 typedef enum {
 123         DM_RET_COPY             = 0x01,
 124         DM_RET_FLAG_MASK        = 0x0f,
 125         DM_RET_NONE             = 0x00,
 126         DM_RET_STOP             = 0x10,
 127         DM_RET_DESCEND          = 0x20,
 128         DM_RET_ERROR            = 0x30,
 129         DM_RET_ACTION_MASK      = 0xf0
 130 } dev_match_ret;
 131
 132 typedef enum {
 133         XPT_DEPTH_BUS,
 134         XPT_DEPTH_TARGET,
 135         XPT_DEPTH_DEVICE,
 136         XPT_DEPTH_PERIPH
 137 } xpt_traverse_depth;
 138
 139 struct xpt_traverse_config {
 140         xpt_traverse_depth      depth;
 141         void                    *tr_func;
 142         void                    *tr_arg;
 143 };
 144
 145 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 146 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 147 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 148 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 149 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 150
 151 /* Transport layer configuration information */
 152 static struct xpt_softc xsoftc;
 153
 154 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
 155 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 156            &xsoftc.boot_delay, 0, "Bus registration wait time");
 157
 158 /* Queues for our software interrupt handler */
 159 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 160 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t;
 161 static cam_simq_t cam_simq;
 162 static struct mtx cam_simq_lock;
 163
 164 /* Pointers to software interrupt handlers */
 165 static void *cambio_ih;
 166
 167 struct cam_periph *xpt_periph;
 168
 169 static periph_init_t xpt_periph_init;
 170
 171 static struct periph_driver xpt_driver =
 172 {
 173         xpt_periph_init, "xpt",
 174         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 175         CAM_PERIPH_DRV_EARLY
 176 };
 177
 178 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 179
 180 static d_open_t xptopen;
 181 static d_close_t xptclose;
 182 static d_ioctl_t xptioctl;
 183 static d_ioctl_t xptdoioctl;
 184
 185 static struct cdevsw xpt_cdevsw = {
 186         .d_version =    D_VERSION,
 187         .d_flags =      0,
 188         .d_open =       xptopen,
 189         .d_close =      xptclose,
 190         .d_ioctl =      xptioctl,
 191         .d_name =       "xpt",
 192 };
 193
 194 /* Storage for debugging datastructures */
 195 struct cam_path *cam_dpath;
 196 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 197 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
 198 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
 199         &cam_dflags, 0, "Enabled debug flags");
 200 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 201 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
 202 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
 203         &cam_debug_delay, 0, "Delay in us after each debug message");
 204
 205 /* Our boot-time initialization hook */
 206 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 207
 208 static moduledata_t cam_moduledata = {
 209         "cam",
 210         cam_module_event_handler,
 211         NULL
 212 };
 213
 214 static int      xpt_init(void *);
 215
 216 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 217 MODULE_VERSION(cam, 1);
 218
 219
 220 static void             xpt_async_bcast(struct async_list *async_head,
 221                                         u_int32_t async_code,
 222                                         struct cam_path *path,
 223                                         void *async_arg);
 224 static path_id_t xptnextfreepathid(void);
 225 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 226 static union ccb *xpt_get_ccb(struct cam_ed *device);
 227 static void      xpt_run_dev_allocq(struct cam_ed *device);
 228 static void      xpt_run_devq(struct cam_devq *devq);
 229 static timeout_t xpt_release_devq_timeout;
 230 static void      xpt_release_simq_timeout(void *arg) __unused;
 231 static void      xpt_release_bus(struct cam_eb *bus);
 232 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 233                     int run_queue);
 234 static struct cam_et*
 235                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 236 static void      xpt_release_target(struct cam_et *target);
 237 static struct cam_eb*
 238                  xpt_find_bus(path_id_t path_id);
 239 static struct cam_et*
 240                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 241 static struct cam_ed*
 242                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 243 static void      xpt_config(void *arg);
 244 static xpt_devicefunc_t xptpassannouncefunc;
 245 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 246 static void      xptpoll(struct cam_sim *sim);
 247 static void      camisr(void *);
 248 static void      camisr_runqueue(struct cam_sim *);
 249 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 250                                     u_int num_patterns, struct cam_eb *bus);
 251 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 252                                        u_int num_patterns,
 253                                        struct cam_ed *device);
 254 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 255                                        u_int num_patterns,
 256                                        struct cam_periph *periph);
 257 static xpt_busfunc_t    xptedtbusfunc;
 258 static xpt_targetfunc_t xptedttargetfunc;
 259 static xpt_devicefunc_t xptedtdevicefunc;
 260 static xpt_periphfunc_t xptedtperiphfunc;
 261 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 262 static xpt_periphfunc_t xptplistperiphfunc;
 263 static int              xptedtmatch(struct ccb_dev_match *cdm);
 264 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 265 static int              xptbustraverse(struct cam_eb *start_bus,
 266                                        xpt_busfunc_t *tr_func, void *arg);
 267 static int              xpttargettraverse(struct cam_eb *bus,
 268                                           struct cam_et *start_target,
 269                                           xpt_targetfunc_t *tr_func, void *arg);
 270 static int              xptdevicetraverse(struct cam_et *target,
 271                                           struct cam_ed *start_device,
 272                                           xpt_devicefunc_t *tr_func, void *arg);
 273 static int              xptperiphtraverse(struct cam_ed *device,
 274                                           struct cam_periph *start_periph,
 275                                           xpt_periphfunc_t *tr_func, void *arg);
 276 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 277                                         xpt_pdrvfunc_t *tr_func, void *arg);
 278 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 279                                             struct cam_periph *start_periph,
 280                                             xpt_periphfunc_t *tr_func,
 281                                             void *arg);
 282 static xpt_busfunc_t    xptdefbusfunc;
 283 static xpt_targetfunc_t xptdeftargetfunc;
 284 static xpt_devicefunc_t xptdefdevicefunc;
 285 static xpt_periphfunc_t xptdefperiphfunc;
 286 static void             xpt_finishconfig_task(void *context, int pending);
 287 static void             xpt_dev_async_default(u_int32_t async_code,
 288                                               struct cam_eb *bus,
 289                                               struct cam_et *target,
 290                                               struct cam_ed *device,
 291                                               void *async_arg);
 292 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 293                                                  struct cam_et *target,
 294                                                  lun_id_t lun_id);
 295 static xpt_devicefunc_t xptsetasyncfunc;
 296 static xpt_busfunc_t    xptsetasyncbusfunc;
 297 static cam_status       xptregister(struct cam_periph *periph,
 298                                     void *arg);
 299 static __inline int periph_is_queued(struct cam_periph *periph);
 300 static __inline int device_is_queued(struct cam_ed *device);
 301
 302 static __inline int
 303 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 304 {
 305         int     retval;
 306
 307         if ((dev->ccbq.queue.entries > 0) &&
 308             (dev->ccbq.dev_openings > 0) &&
 309             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 310                 /*
 311                  * The priority of a device waiting for controller
 312                  * resources is that of the highest priority CCB
 313                  * enqueued.
 314                  */
 315                 retval =
 316                     xpt_schedule_dev(&devq->send_queue,
 317                                      &dev->devq_entry.pinfo,
 318                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 319         } else {
 320                 retval = 0;
 321         }
 322         return (retval);
 323 }
 324
 325 static __inline int
 326 periph_is_queued(struct cam_periph *periph)
 327 {
 328         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 329 }
 330
 331 static __inline int
 332 device_is_queued(struct cam_ed *device)
 333 {
 334         return (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 335 }
 336
 337 static void
 338 xpt_periph_init()
 339 {
 340         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 341 }
 342
 343 static void
 344 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 345 {
 346         /* Caller will release the CCB */
 347         wakeup(&done_ccb->ccb_h.cbfcnp);
 348 }
 349
 350 static int
 351 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 352 {
 353
 354         /*
 355          * Only allow read-write access.
 356          */
 357         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 358                 return(EPERM);
 359
 360         /*
 361          * We don't allow nonblocking access.
 362          */
 363         if ((flags & O_NONBLOCK) != 0) {
 364                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 365                 return(ENODEV);
 366         }
 367
 368         /* Mark ourselves open */
 369         mtx_lock(&xsoftc.xpt_lock);
 370         xsoftc.flags |= XPT_FLAG_OPEN;
 371         mtx_unlock(&xsoftc.xpt_lock);
 372
 373         return(0);
 374 }
 375
 376 static int
 377 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 378 {
 379
 380         /* Mark ourselves closed */
 381         mtx_lock(&xsoftc.xpt_lock);
 382         xsoftc.flags &= ~XPT_FLAG_OPEN;
 383         mtx_unlock(&xsoftc.xpt_lock);
 384
 385         return(0);
 386 }
 387
 388 /*
 389  * Don't automatically grab the xpt softc lock here even though this is going
 390  * through the xpt device.  The xpt device is really just a back door for
 391  * accessing other devices and SIMs, so the right thing to do is to grab
 392  * the appropriate SIM lock once the bus/SIM is located.
 393  */
 394 static int
 395 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 396 {
 397         int error;
 398
 399         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 400                 error = cam_compat_ioctl(dev, &cmd, &addr, &flag, td);
 401                 if (error == EAGAIN)
 402                         return (xptdoioctl(dev, cmd, addr, flag, td));
 403         }
 404         return (error);
 405 }
 406
 407 static int
 408 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 409 {
 410         int error;
 411
 412         error = 0;
 413
 414         switch(cmd) {
 415         /*
 416          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 417          * to accept CCB types that don't quite make sense to send through a
 418          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 419          * in the CAM spec.
 420          */
 421         case CAMIOCOMMAND: {
 422                 union ccb *ccb;
 423                 union ccb *inccb;
 424                 struct cam_eb *bus;
 425
 426                 inccb = (union ccb *)addr;
 427
 428                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 429                 if (bus == NULL)
 430                         return (EINVAL);
 431
 432                 switch (inccb->ccb_h.func_code) {
 433                 case XPT_SCAN_BUS:
 434                 case XPT_RESET_BUS:
 435                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 436                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 437                                 xpt_release_bus(bus);
 438                                 return (EINVAL);
 439                         }
 440                         break;
 441                 case XPT_SCAN_TGT:
 442                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 443                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 444                                 xpt_release_bus(bus);
 445                                 return (EINVAL);
 446                         }
 447                         break;
 448                 default:
 449                         break;
 450                 }
 451
 452                 switch(inccb->ccb_h.func_code) {
 453                 case XPT_SCAN_BUS:
 454                 case XPT_RESET_BUS:
 455                 case XPT_PATH_INQ:
 456                 case XPT_ENG_INQ:
 457                 case XPT_SCAN_LUN:
 458                 case XPT_SCAN_TGT:
 459
 460                         ccb = xpt_alloc_ccb();
 461
 462                         CAM_SIM_LOCK(bus->sim);
 463
 464                         /*
 465                          * Create a path using the bus, target, and lun the
 466                          * user passed in.
 467                          */
 468                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 469                                             inccb->ccb_h.path_id,
 470                                             inccb->ccb_h.target_id,
 471                                             inccb->ccb_h.target_lun) !=
 472                                             CAM_REQ_CMP){
 473                                 error = EINVAL;
 474                                 CAM_SIM_UNLOCK(bus->sim);
 475                                 xpt_free_ccb(ccb);
 476                                 break;
 477                         }
 478                         /* Ensure all of our fields are correct */
 479                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 480                                       inccb->ccb_h.pinfo.priority);
 481                         xpt_merge_ccb(ccb, inccb);
 482                         ccb->ccb_h.cbfcnp = xptdone;
 483                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 484                         bcopy(ccb, inccb, sizeof(union ccb));
 485                         xpt_free_path(ccb->ccb_h.path);
 486                         xpt_free_ccb(ccb);
 487                         CAM_SIM_UNLOCK(bus->sim);
 488                         break;
 489
 490                 case XPT_DEBUG: {
 491                         union ccb ccb;
 492
 493                         /*
 494                          * This is an immediate CCB, so it's okay to
 495                          * allocate it on the stack.
 496                          */
 497
 498                         CAM_SIM_LOCK(bus->sim);
 499
 500                         /*
 501                          * Create a path using the bus, target, and lun the
 502                          * user passed in.
 503                          */
 504                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 505                                             inccb->ccb_h.path_id,
 506                                             inccb->ccb_h.target_id,
 507                                             inccb->ccb_h.target_lun) !=
 508                                             CAM_REQ_CMP){
 509                                 error = EINVAL;
 510                                 CAM_SIM_UNLOCK(bus->sim);
 511                                 break;
 512                         }
 513                         /* Ensure all of our fields are correct */
 514                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 515                                       inccb->ccb_h.pinfo.priority);
 516                         xpt_merge_ccb(&ccb, inccb);
 517                         ccb.ccb_h.cbfcnp = xptdone;
 518                         xpt_action(&ccb);
 519                         bcopy(&ccb, inccb, sizeof(union ccb));
 520                         xpt_free_path(ccb.ccb_h.path);
 521                         CAM_SIM_UNLOCK(bus->sim);
 522                         break;
 523
 524                 }
 525                 case XPT_DEV_MATCH: {
 526                         struct cam_periph_map_info mapinfo;
 527                         struct cam_path *old_path;
 528
 529                         /*
 530                          * We can't deal with physical addresses for this
 531                          * type of transaction.
 532                          */
 533                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 534                             CAM_DATA_VADDR) {
 535                                 error = EINVAL;
 536                                 break;
 537                         }
 538
 539                         /*
 540                          * Save this in case the caller had it set to
 541                          * something in particular.
 542                          */
 543                         old_path = inccb->ccb_h.path;
 544
 545                         /*
 546                          * We really don't need a path for the matching
 547                          * code.  The path is needed because of the
 548                          * debugging statements in xpt_action().  They
 549                          * assume that the CCB has a valid path.
 550                          */
 551                         inccb->ccb_h.path = xpt_periph->path;
 552
 553                         bzero(&mapinfo, sizeof(mapinfo));
 554
 555                         /*
 556                          * Map the pattern and match buffers into kernel
 557                          * virtual address space.
 558                          */
 559                         error = cam_periph_mapmem(inccb, &mapinfo);
 560
 561                         if (error) {
 562                                 inccb->ccb_h.path = old_path;
 563                                 break;
 564                         }
 565
 566                         /*
 567                          * This is an immediate CCB, we can send it on directly.
 568                          */
 569                         CAM_SIM_LOCK(xpt_path_sim(xpt_periph->path));
 570                         xpt_action(inccb);
 571                         CAM_SIM_UNLOCK(xpt_path_sim(xpt_periph->path));
 572
 573                         /*
 574                          * Map the buffers back into user space.
 575                          */
 576                         cam_periph_unmapmem(inccb, &mapinfo);
 577
 578                         inccb->ccb_h.path = old_path;
 579
 580                         error = 0;
 581                         break;
 582                 }
 583                 default:
 584                         error = ENOTSUP;
 585                         break;
 586                 }
 587                 xpt_release_bus(bus);
 588                 break;
 589         }
 590         /*
 591          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 592          * with the periphal driver name and unit name filled in.  The other
 593          * fields don't really matter as input.  The passthrough driver name
 594          * ("pass"), and unit number are passed back in the ccb.  The current
 595          * device generation number, and the index into the device peripheral
 596          * driver list, and the status are also passed back.  Note that
 597          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 598          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 599          * (or rather should be) impossible for the device peripheral driver
 600          * list to change since we look at the whole thing in one pass, and
 601          * we do it with lock protection.
 602          *
 603          */
 604         case CAMGETPASSTHRU: {
 605                 union ccb *ccb;
 606                 struct cam_periph *periph;
 607                 struct periph_driver **p_drv;
 608                 char   *name;
 609                 u_int unit;
 610                 int base_periph_found;
 611
 612                 ccb = (union ccb *)addr;
 613                 unit = ccb->cgdl.unit_number;
 614                 name = ccb->cgdl.periph_name;
 615                 base_periph_found = 0;
 616
 617                 /*
 618                  * Sanity check -- make sure we don't get a null peripheral
 619                  * driver name.
 620                  */
 621                 if (*ccb->cgdl.periph_name == '\0') {
 622                         error = EINVAL;
 623                         break;
 624                 }
 625
 626                 /* Keep the list from changing while we traverse it */
 627                 xpt_lock_buses();
 628
 629                 /* first find our driver in the list of drivers */
 630                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 631                         if (strcmp((*p_drv)->driver_name, name) == 0)
 632                                 break;
 633
 634                 if (*p_drv == NULL) {
 635                         xpt_unlock_buses();
 636                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 637                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 638                         *ccb->cgdl.periph_name = '\0';
 639                         ccb->cgdl.unit_number = 0;
 640                         error = ENOENT;
 641                         break;
 642                 }
 643
 644                 /*
 645                  * Run through every peripheral instance of this driver
 646                  * and check to see whether it matches the unit passed
 647                  * in by the user.  If it does, get out of the loops and
 648                  * find the passthrough driver associated with that
 649                  * peripheral driver.
 650                  */
 651                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 652                      periph = TAILQ_NEXT(periph, unit_links)) {
 653
 654                         if (periph->unit_number == unit)
 655                                 break;
 656                 }
 657                 /*
 658                  * If we found the peripheral driver that the user passed
 659                  * in, go through all of the peripheral drivers for that
 660                  * particular device and look for a passthrough driver.
 661                  */
 662                 if (periph != NULL) {
 663                         struct cam_ed *device;
 664                         int i;
 665
 666                         base_periph_found = 1;
 667                         device = periph->path->device;
 668                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 669                              periph != NULL;
 670                              periph = SLIST_NEXT(periph, periph_links), i++) {
 671                                 /*
 672                                  * Check to see whether we have a
 673                                  * passthrough device or not.
 674                                  */
 675                                 if (strcmp(periph->periph_name, "pass") == 0) {
 676                                         /*
 677                                          * Fill in the getdevlist fields.
 678                                          */
 679                                         strcpy(ccb->cgdl.periph_name,
 680                                                periph->periph_name);
 681                                         ccb->cgdl.unit_number =
 682                                                 periph->unit_number;
 683                                         if (SLIST_NEXT(periph, periph_links))
 684                                                 ccb->cgdl.status =
 685                                                         CAM_GDEVLIST_MORE_DEVS;
 686                                         else
 687                                                 ccb->cgdl.status =
 688                                                        CAM_GDEVLIST_LAST_DEVICE;
 689                                         ccb->cgdl.generation =
 690                                                 device->generation;
 691                                         ccb->cgdl.index = i;
 692                                         /*
 693                                          * Fill in some CCB header fields
 694                                          * that the user may want.
 695                                          */
 696                                         ccb->ccb_h.path_id =
 697                                                 periph->path->bus->path_id;
 698                                         ccb->ccb_h.target_id =
 699                                                 periph->path->target->target_id;
 700                                         ccb->ccb_h.target_lun =
 701                                                 periph->path->device->lun_id;
 702                                         ccb->ccb_h.status = CAM_REQ_CMP;
 703                                         break;
 704                                 }
 705                         }
 706                 }
 707
 708                 /*
 709                  * If the periph is null here, one of two things has
 710                  * happened.  The first possibility is that we couldn't
 711                  * find the unit number of the particular peripheral driver
 712                  * that the user is asking about.  e.g. the user asks for
 713                  * the passthrough driver for "da11".  We find the list of
 714                  * "da" peripherals all right, but there is no unit 11.
 715                  * The other possibility is that we went through the list
 716                  * of peripheral drivers attached to the device structure,
 717                  * but didn't find one with the name "pass".  Either way,
 718                  * we return ENOENT, since we couldn't find something.
 719                  */
 720                 if (periph == NULL) {
 721                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 722                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 723                         *ccb->cgdl.periph_name = '\0';
 724                         ccb->cgdl.unit_number = 0;
 725                         error = ENOENT;
 726                         /*
 727                          * It is unfortunate that this is even necessary,
 728                          * but there are many, many clueless users out there.
 729                          * If this is true, the user is looking for the
 730                          * passthrough driver, but doesn't have one in his
 731                          * kernel.
 732                          */
 733                         if (base_periph_found == 1) {
 734                                 printf("xptioctl: pass driver is not in the "
 735                                        "kernel\n");
 736                                 printf("xptioctl: put \"device pass\" in "
 737                                        "your kernel config file\n");
 738                         }
 739                 }
 740                 xpt_unlock_buses();
 741                 break;
 742                 }
 743         default:
 744                 error = ENOTTY;
 745                 break;
 746         }
 747
 748         return(error);
 749 }
 750
 751 static int
 752 cam_module_event_handler(module_t mod, int what, void *arg)
 753 {
 754         int error;
 755
 756         switch (what) {
 757         case MOD_LOAD:
 758                 if ((error = xpt_init(NULL)) != 0)
 759                         return (error);
 760                 break;
 761         case MOD_UNLOAD:
 762                 return EBUSY;
 763         default:
 764                 return EOPNOTSUPP;
 765         }
 766
 767         return 0;
 768 }
 769
 770 static void
 771 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 772 {
 773
 774         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 775                 xpt_free_path(done_ccb->ccb_h.path);
 776                 xpt_free_ccb(done_ccb);
 777         } else {
 778                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 779                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 780         }
 781         xpt_release_boot();
 782 }
 783
 784 /* thread to handle bus rescans */
 785 static void
 786 xpt_scanner_thread(void *dummy)
 787 {
 788         union ccb       *ccb;
 789         struct cam_sim  *sim;
 790
 791         xpt_lock_buses();
 792         for (;;) {
 793                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 794                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 795                                "ccb_scanq", 0);
 796                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 797                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 798                         xpt_unlock_buses();
 799
 800                         sim = ccb->ccb_h.path->bus->sim;
 801                         CAM_SIM_LOCK(sim);
 802                         xpt_action(ccb);
 803                         CAM_SIM_UNLOCK(sim);
 804
 805                         xpt_lock_buses();
 806                 }
 807         }
 808 }
 809
 810 void
 811 xpt_rescan(union ccb *ccb)
 812 {
 813         struct ccb_hdr *hdr;
 814
 815         /* Prepare request */
 816         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 817             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 818                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 819         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 820             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 821                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 822         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 823             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 824                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 825         else {
 826                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 827                 xpt_free_path(ccb->ccb_h.path);
 828                 xpt_free_ccb(ccb);
 829                 return;
 830         }
 831         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 832         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 833         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 834         /* Don't make duplicate entries for the same paths. */
 835         xpt_lock_buses();
 836         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 837                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 838                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 839                                 wakeup(&xsoftc.ccb_scanq);
 840                                 xpt_unlock_buses();
 841                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 842                                 xpt_free_path(ccb->ccb_h.path);
 843                                 xpt_free_ccb(ccb);
 844                                 return;
 845                         }
 846                 }
 847         }
 848         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 849         xsoftc.buses_to_config++;
 850         wakeup(&xsoftc.ccb_scanq);
 851         xpt_unlock_buses();
 852 }
 853
 854 /* Functions accessed by the peripheral drivers */
 855 static int
 856 xpt_init(void *dummy)
 857 {
 858         struct cam_sim *xpt_sim;
 859         struct cam_path *path;
 860         struct cam_devq *devq;
 861         cam_status status;
 862
 863         TAILQ_INIT(&xsoftc.xpt_busses);
 864         TAILQ_INIT(&cam_simq);
 865         TAILQ_INIT(&xsoftc.ccb_scanq);
 866         STAILQ_INIT(&xsoftc.highpowerq);
 867         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 868
 869         mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF);
 870         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 871         mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF);
 872
 873 #ifdef CAM_BOOT_DELAY
 874         /*
 875          * Override this value at compile time to assist our users
 876          * who don't use loader to boot a kernel.
 877          */
 878         xsoftc.boot_delay = CAM_BOOT_DELAY;
 879 #endif
 880         /*
 881          * The xpt layer is, itself, the equivelent of a SIM.
 882          * Allow 16 ccbs in the ccb pool for it.  This should
 883          * give decent parallelism when we probe busses and
 884          * perform other XPT functions.
 885          */
 886         devq = cam_simq_alloc(16);
 887         xpt_sim = cam_sim_alloc(xptaction,
 888                                 xptpoll,
 889                                 "xpt",
 890                                 /*softc*/NULL,
 891                                 /*unit*/0,
 892                                 /*mtx*/&xsoftc.xpt_lock,
 893                                 /*max_dev_transactions*/0,
 894                                 /*max_tagged_dev_transactions*/0,
 895                                 devq);
 896         if (xpt_sim == NULL)
 897                 return (ENOMEM);
 898
 899         mtx_lock(&xsoftc.xpt_lock);
 900         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 901                 mtx_unlock(&xsoftc.xpt_lock);
 902                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 903                        " failing attach\n", status);
 904                 return (EINVAL);
 905         }
 906
 907         /*
 908          * Looking at the XPT from the SIM layer, the XPT is
 909          * the equivelent of a peripheral driver.  Allocate
 910          * a peripheral driver entry for us.
 911          */
 912         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 913                                       CAM_TARGET_WILDCARD,
 914                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 915                 mtx_unlock(&xsoftc.xpt_lock);
 916                 printf("xpt_init: xpt_create_path failed with status %#x,"
 917                        " failing attach\n", status);
 918                 return (EINVAL);
 919         }
 920
 921         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 922                          path, NULL, 0, xpt_sim);
 923         xpt_free_path(path);
 924         mtx_unlock(&xsoftc.xpt_lock);
 925         /* Install our software interrupt handlers */
 926         swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih);
 927         /*
 928          * Register a callback for when interrupts are enabled.
 929          */
 930         xsoftc.xpt_config_hook =
 931             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 932                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 933         if (xsoftc.xpt_config_hook == NULL) {
 934                 printf("xpt_init: Cannot malloc config hook "
 935                        "- failing attach\n");
 936                 return (ENOMEM);
 937         }
 938         xsoftc.xpt_config_hook->ich_func = xpt_config;
 939         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 940                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 941                 printf("xpt_init: config_intrhook_establish failed "
 942                        "- failing attach\n");
 943         }
 944
 945         return (0);
 946 }
 947
 948 static cam_status
 949 xptregister(struct cam_periph *periph, void *arg)
 950 {
 951         struct cam_sim *xpt_sim;
 952
 953         if (periph == NULL) {
 954                 printf("xptregister: periph was NULL!!\n");
 955                 return(CAM_REQ_CMP_ERR);
 956         }
 957
 958         xpt_sim = (struct cam_sim *)arg;
 959         xpt_sim->softc = periph;
 960         xpt_periph = periph;
 961         periph->softc = NULL;
 962
 963         return(CAM_REQ_CMP);
 964 }
 965
 966 int32_t
 967 xpt_add_periph(struct cam_periph *periph)
 968 {
 969         struct cam_ed *device;
 970         int32_t  status;
 971         struct periph_list *periph_head;
 972
 973         mtx_assert(periph->sim->mtx, MA_OWNED);
 974
 975         device = periph->path->device;
 976
 977         periph_head = &device->periphs;
 978
 979         status = CAM_REQ_CMP;
 980
 981         if (device != NULL) {
 982                 /*
 983                  * Make room for this peripheral
 984                  * so it will fit in the queue
 985                  * when it's scheduled to run
 986                  */
 987                 status = camq_resize(&device->drvq,
 988                                      device->drvq.array_size + 1);
 989
 990                 device->generation++;
 991
 992                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
 993         }
 994
 995         return (status);
 996 }
 997
 998 void
 999 xpt_remove_periph(struct cam_periph *periph)
1000 {
1001         struct cam_ed *device;
1002
1003         mtx_assert(periph->sim->mtx, MA_OWNED);
1004
1005         device = periph->path->device;
1006
1007         if (device != NULL) {
1008                 struct periph_list *periph_head;
1009
1010                 periph_head = &device->periphs;
1011
1012                 /* Release the slot for this peripheral */
1013                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1014
1015                 device->generation++;
1016
1017                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1018         }
1019 }
1020
1021
1022 void
1023 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1024 {
1025         struct  cam_path *path = periph->path;
1026
1027         mtx_assert(periph->sim->mtx, MA_OWNED);
1028
1029         printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n",
1030                periph->periph_name, periph->unit_number,
1031                path->bus->sim->sim_name,
1032                path->bus->sim->unit_number,
1033                path->bus->sim->bus_id,
1034                path->bus->path_id,
1035                path->target->target_id,
1036                path->device->lun_id);
1037         printf("%s%d: ", periph->periph_name, periph->unit_number);
1038         if (path->device->protocol == PROTO_SCSI)
1039                 scsi_print_inquiry(&path->device->inq_data);
1040         else if (path->device->protocol == PROTO_ATA ||
1041             path->device->protocol == PROTO_SATAPM)
1042                 ata_print_ident(&path->device->ident_data);
1043         else if (path->device->protocol == PROTO_SEMB)
1044                 semb_print_ident(
1045                     (struct sep_identify_data *)&path->device->ident_data);
1046         else
1047                 printf("Unknown protocol device\n");
1048         if (bootverbose && path->device->serial_num_len > 0) {
1049                 /* Don't wrap the screen  - print only the first 60 chars */
1050                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1051                        periph->unit_number, path->device->serial_num);
1052         }
1053         /* Announce transport details. */
1054         (*(path->bus->xport->announce))(periph);
1055         /* Announce command queueing. */
1056         if (path->device->inq_flags & SID_CmdQue
1057          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1058                 printf("%s%d: Command Queueing enabled\n",
1059                        periph->periph_name, periph->unit_number);
1060         }
1061         /* Announce caller's details if they've passed in. */
1062         if (announce_string != NULL)
1063                 printf("%s%d: %s\n", periph->periph_name,
1064                        periph->unit_number, announce_string);
1065 }
1066
1067 void
1068 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1069 {
1070         if (quirks != 0) {
1071                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1072                     periph->unit_number, quirks, bit_string);
1073         }
1074 }
1075
1076 int
1077 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1078 {
1079         int ret = -1, l;
1080         struct ccb_dev_advinfo cdai;
1081         struct scsi_vpd_id_descriptor *idd;
1082
1083         mtx_assert(path->bus->sim->mtx, MA_OWNED);
1084
1085         memset(&cdai, 0, sizeof(cdai));
1086         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1087         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1088         cdai.bufsiz = len;
1089
1090         if (!strcmp(attr, "GEOM::ident"))
1091                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1092         else if (!strcmp(attr, "GEOM::physpath"))
1093                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1094         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1095                  strcmp(attr, "GEOM::lunname") == 0) {
1096                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1097                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1098         } else
1099                 goto out;
1100
1101         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1102         if (cdai.buf == NULL) {
1103                 ret = ENOMEM;
1104                 goto out;
1105         }
1106         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1107         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1108                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1109         if (cdai.provsiz == 0)
1110                 goto out;
1111         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1112                 if (strcmp(attr, "GEOM::lunid") == 0) {
1113                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1114                             cdai.provsiz, scsi_devid_is_lun_naa);
1115                         if (idd == NULL)
1116                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1117                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1118                 } else
1119                         idd = NULL;
1120                 if (idd == NULL)
1121                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1122                             cdai.provsiz, scsi_devid_is_lun_t10);
1123                 if (idd == NULL)
1124                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1125                             cdai.provsiz, scsi_devid_is_lun_name);
1126                 if (idd == NULL)
1127                         goto out;
1128                 ret = 0;
1129                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII ||
1130                     (idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1131                         l = strnlen(idd->identifier, idd->length);
1132                         if (l < len) {
1133                                 bcopy(idd->identifier, buf, l);
1134                                 buf[l] = 0;
1135                         } else
1136                                 ret = EFAULT;
1137                 } else {
1138                         if (idd->length * 2 < len) {
1139                                 for (l = 0; l < idd->length; l++)
1140                                         sprintf(buf + l * 2, "%02x",
1141                                             idd->identifier[l]);
1142                         } else
1143                                 ret = EFAULT;
1144                 }
1145         } else {
1146                 ret = 0;
1147                 if (strlcpy(buf, cdai.buf, len) >= len)
1148                         ret = EFAULT;
1149         }
1150
1151 out:
1152         if (cdai.buf != NULL)
1153                 free(cdai.buf, M_CAMXPT);
1154         return ret;
1155 }
1156
1157 static dev_match_ret
1158 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1159             struct cam_eb *bus)
1160 {
1161         dev_match_ret retval;
1162         int i;
1163
1164         retval = DM_RET_NONE;
1165
1166         /*
1167          * If we aren't given something to match against, that's an error.
1168          */
1169         if (bus == NULL)
1170                 return(DM_RET_ERROR);
1171
1172         /*
1173          * If there are no match entries, then this bus matches no
1174          * matter what.
1175          */
1176         if ((patterns == NULL) || (num_patterns == 0))
1177                 return(DM_RET_DESCEND | DM_RET_COPY);
1178
1179         for (i = 0; i < num_patterns; i++) {
1180                 struct bus_match_pattern *cur_pattern;
1181
1182                 /*
1183                  * If the pattern in question isn't for a bus node, we
1184                  * aren't interested.  However, we do indicate to the
1185                  * calling routine that we should continue descending the
1186                  * tree, since the user wants to match against lower-level
1187                  * EDT elements.
1188                  */
1189                 if (patterns[i].type != DEV_MATCH_BUS) {
1190                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1191                                 retval |= DM_RET_DESCEND;
1192                         continue;
1193                 }
1194
1195                 cur_pattern = &patterns[i].pattern.bus_pattern;
1196
1197                 /*
1198                  * If they want to match any bus node, we give them any
1199                  * device node.
1200                  */
1201                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1202                         /* set the copy flag */
1203                         retval |= DM_RET_COPY;
1204
1205                         /*
1206                          * If we've already decided on an action, go ahead
1207                          * and return.
1208                          */
1209                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1210                                 return(retval);
1211                 }
1212
1213                 /*
1214                  * Not sure why someone would do this...
1215                  */
1216                 if (cur_pattern->flags == BUS_MATCH_NONE)
1217                         continue;
1218
1219                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1220                  && (cur_pattern->path_id != bus->path_id))
1221                         continue;
1222
1223                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1224                  && (cur_pattern->bus_id != bus->sim->bus_id))
1225                         continue;
1226
1227                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1228                  && (cur_pattern->unit_number != bus->sim->unit_number))
1229                         continue;
1230
1231                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1232                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1233                              DEV_IDLEN) != 0))
1234                         continue;
1235
1236                 /*
1237                  * If we get to this point, the user definitely wants
1238                  * information on this bus.  So tell the caller to copy the
1239                  * data out.
1240                  */
1241                 retval |= DM_RET_COPY;
1242
1243                 /*
1244                  * If the return action has been set to descend, then we
1245                  * know that we've already seen a non-bus matching
1246                  * expression, therefore we need to further descend the tree.
1247                  * This won't change by continuing around the loop, so we
1248                  * go ahead and return.  If we haven't seen a non-bus
1249                  * matching expression, we keep going around the loop until
1250                  * we exhaust the matching expressions.  We'll set the stop
1251                  * flag once we fall out of the loop.
1252                  */
1253                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1254                         return(retval);
1255         }
1256
1257         /*
1258          * If the return action hasn't been set to descend yet, that means
1259          * we haven't seen anything other than bus matching patterns.  So
1260          * tell the caller to stop descending the tree -- the user doesn't
1261          * want to match against lower level tree elements.
1262          */
1263         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1264                 retval |= DM_RET_STOP;
1265
1266         return(retval);
1267 }
1268
1269 static dev_match_ret
1270 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1271                struct cam_ed *device)
1272 {
1273         dev_match_ret retval;
1274         int i;
1275
1276         retval = DM_RET_NONE;
1277
1278         /*
1279          * If we aren't given something to match against, that's an error.
1280          */
1281         if (device == NULL)
1282                 return(DM_RET_ERROR);
1283
1284         /*
1285          * If there are no match entries, then this device matches no
1286          * matter what.
1287          */
1288         if ((patterns == NULL) || (num_patterns == 0))
1289                 return(DM_RET_DESCEND | DM_RET_COPY);
1290
1291         for (i = 0; i < num_patterns; i++) {
1292                 struct device_match_pattern *cur_pattern;
1293                 struct scsi_vpd_device_id *device_id_page;
1294
1295                 /*
1296                  * If the pattern in question isn't for a device node, we
1297                  * aren't interested.
1298                  */
1299                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1300                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1301                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1302                                 retval |= DM_RET_DESCEND;
1303                         continue;
1304                 }
1305
1306                 cur_pattern = &patterns[i].pattern.device_pattern;
1307
1308                 /* Error out if mutually exclusive options are specified. */
1309                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1310                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1311                         return(DM_RET_ERROR);
1312
1313                 /*
1314                  * If they want to match any device node, we give them any
1315                  * device node.
1316                  */
1317                 if (cur_pattern->flags == DEV_MATCH_ANY)
1318                         goto copy_dev_node;
1319
1320                 /*
1321                  * Not sure why someone would do this...
1322                  */
1323                 if (cur_pattern->flags == DEV_MATCH_NONE)
1324                         continue;
1325
1326                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1327                  && (cur_pattern->path_id != device->target->bus->path_id))
1328                         continue;
1329
1330                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1331                  && (cur_pattern->target_id != device->target->target_id))
1332                         continue;
1333
1334                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1335                  && (cur_pattern->target_lun != device->lun_id))
1336                         continue;
1337
1338                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1339                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1340                                     (caddr_t)&cur_pattern->data.inq_pat,
1341                                     1, sizeof(cur_pattern->data.inq_pat),
1342                                     scsi_static_inquiry_match) == NULL))
1343                         continue;
1344
1345                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1346                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1347                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1348                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1349                                       device->device_id_len
1350                                     - SVPD_DEVICE_ID_HDR_LEN,
1351                                       cur_pattern->data.devid_pat.id,
1352                                       cur_pattern->data.devid_pat.id_len) != 0))
1353                         continue;
1354
1355 copy_dev_node:
1356                 /*
1357                  * If we get to this point, the user definitely wants
1358                  * information on this device.  So tell the caller to copy
1359                  * the data out.
1360                  */
1361                 retval |= DM_RET_COPY;
1362
1363                 /*
1364                  * If the return action has been set to descend, then we
1365                  * know that we've already seen a peripheral matching
1366                  * expression, therefore we need to further descend the tree.
1367                  * This won't change by continuing around the loop, so we
1368                  * go ahead and return.  If we haven't seen a peripheral
1369                  * matching expression, we keep going around the loop until
1370                  * we exhaust the matching expressions.  We'll set the stop
1371                  * flag once we fall out of the loop.
1372                  */
1373                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1374                         return(retval);
1375         }
1376
1377         /*
1378          * If the return action hasn't been set to descend yet, that means
1379          * we haven't seen any peripheral matching patterns.  So tell the
1380          * caller to stop descending the tree -- the user doesn't want to
1381          * match against lower level tree elements.
1382          */
1383         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1384                 retval |= DM_RET_STOP;
1385
1386         return(retval);
1387 }
1388
1389 /*
1390  * Match a single peripheral against any number of match patterns.
1391  */
1392 static dev_match_ret
1393 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1394                struct cam_periph *periph)
1395 {
1396         dev_match_ret retval;
1397         int i;
1398
1399         /*
1400          * If we aren't given something to match against, that's an error.
1401          */
1402         if (periph == NULL)
1403                 return(DM_RET_ERROR);
1404
1405         /*
1406          * If there are no match entries, then this peripheral matches no
1407          * matter what.
1408          */
1409         if ((patterns == NULL) || (num_patterns == 0))
1410                 return(DM_RET_STOP | DM_RET_COPY);
1411
1412         /*
1413          * There aren't any nodes below a peripheral node, so there's no
1414          * reason to descend the tree any further.
1415          */
1416         retval = DM_RET_STOP;
1417
1418         for (i = 0; i < num_patterns; i++) {
1419                 struct periph_match_pattern *cur_pattern;
1420
1421                 /*
1422                  * If the pattern in question isn't for a peripheral, we
1423                  * aren't interested.
1424                  */
1425                 if (patterns[i].type != DEV_MATCH_PERIPH)
1426                         continue;
1427
1428                 cur_pattern = &patterns[i].pattern.periph_pattern;
1429
1430                 /*
1431                  * If they want to match on anything, then we will do so.
1432                  */
1433                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1434                         /* set the copy flag */
1435                         retval |= DM_RET_COPY;
1436
1437                         /*
1438                          * We've already set the return action to stop,
1439                          * since there are no nodes below peripherals in
1440                          * the tree.
1441                          */
1442                         return(retval);
1443                 }
1444
1445                 /*
1446                  * Not sure why someone would do this...
1447                  */
1448                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1449                         continue;
1450
1451                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1452                  && (cur_pattern->path_id != periph->path->bus->path_id))
1453                         continue;
1454
1455                 /*
1456                  * For the target and lun id's, we have to make sure the
1457                  * target and lun pointers aren't NULL.  The xpt peripheral
1458                  * has a wildcard target and device.
1459                  */
1460                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1461                  && ((periph->path->target == NULL)
1462                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1463                         continue;
1464
1465                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1466                  && ((periph->path->device == NULL)
1467                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1468                         continue;
1469
1470                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1471                  && (cur_pattern->unit_number != periph->unit_number))
1472                         continue;
1473
1474                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1475                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1476                              DEV_IDLEN) != 0))
1477                         continue;
1478
1479                 /*
1480                  * If we get to this point, the user definitely wants
1481                  * information on this peripheral.  So tell the caller to
1482                  * copy the data out.
1483                  */
1484                 retval |= DM_RET_COPY;
1485
1486                 /*
1487                  * The return action has already been set to stop, since
1488                  * peripherals don't have any nodes below them in the EDT.
1489                  */
1490                 return(retval);
1491         }
1492
1493         /*
1494          * If we get to this point, the peripheral that was passed in
1495          * doesn't match any of the patterns.
1496          */
1497         return(retval);
1498 }
1499
1500 static int
1501 xptedtbusfunc(struct cam_eb *bus, void *arg)
1502 {
1503         struct ccb_dev_match *cdm;
1504         dev_match_ret retval;
1505
1506         cdm = (struct ccb_dev_match *)arg;
1507
1508         /*
1509          * If our position is for something deeper in the tree, that means
1510          * that we've already seen this node.  So, we keep going down.
1511          */
1512         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1513          && (cdm->pos.cookie.bus == bus)
1514          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1515          && (cdm->pos.cookie.target != NULL))
1516                 retval = DM_RET_DESCEND;
1517         else
1518                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1519
1520         /*
1521          * If we got an error, bail out of the search.
1522          */
1523         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1524                 cdm->status = CAM_DEV_MATCH_ERROR;
1525                 return(0);
1526         }
1527
1528         /*
1529          * If the copy flag is set, copy this bus out.
1530          */
1531         if (retval & DM_RET_COPY) {
1532                 int spaceleft, j;
1533
1534                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1535                         sizeof(struct dev_match_result));
1536
1537                 /*
1538                  * If we don't have enough space to put in another
1539                  * match result, save our position and tell the
1540                  * user there are more devices to check.
1541                  */
1542                 if (spaceleft < sizeof(struct dev_match_result)) {
1543                         bzero(&cdm->pos, sizeof(cdm->pos));
1544                         cdm->pos.position_type =
1545                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1546
1547                         cdm->pos.cookie.bus = bus;
1548                         cdm->pos.generations[CAM_BUS_GENERATION]=
1549                                 xsoftc.bus_generation;
1550                         cdm->status = CAM_DEV_MATCH_MORE;
1551                         return(0);
1552                 }
1553                 j = cdm->num_matches;
1554                 cdm->num_matches++;
1555                 cdm->matches[j].type = DEV_MATCH_BUS;
1556                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1557                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1558                 cdm->matches[j].result.bus_result.unit_number =
1559                         bus->sim->unit_number;
1560                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1561                         bus->sim->sim_name, DEV_IDLEN);
1562         }
1563
1564         /*
1565          * If the user is only interested in busses, there's no
1566          * reason to descend to the next level in the tree.
1567          */
1568         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1569                 return(1);
1570
1571         /*
1572          * If there is a target generation recorded, check it to
1573          * make sure the target list hasn't changed.
1574          */
1575         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1576          && (bus == cdm->pos.cookie.bus)
1577          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1578          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1579          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1580              bus->generation)) {
1581                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1582                 return(0);
1583         }
1584
1585         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1586          && (cdm->pos.cookie.bus == bus)
1587          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1588          && (cdm->pos.cookie.target != NULL))
1589                 return(xpttargettraverse(bus,
1590                                         (struct cam_et *)cdm->pos.cookie.target,
1591                                          xptedttargetfunc, arg));
1592         else
1593                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1594 }
1595
1596 static int
1597 xptedttargetfunc(struct cam_et *target, void *arg)
1598 {
1599         struct ccb_dev_match *cdm;
1600
1601         cdm = (struct ccb_dev_match *)arg;
1602
1603         /*
1604          * If there is a device list generation recorded, check it to
1605          * make sure the device list hasn't changed.
1606          */
1607         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1608          && (cdm->pos.cookie.bus == target->bus)
1609          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1610          && (cdm->pos.cookie.target == target)
1611          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1612          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
1613          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
1614              target->generation)) {
1615                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1616                 return(0);
1617         }
1618
1619         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1620          && (cdm->pos.cookie.bus == target->bus)
1621          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1622          && (cdm->pos.cookie.target == target)
1623          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1624          && (cdm->pos.cookie.device != NULL))
1625                 return(xptdevicetraverse(target,
1626                                         (struct cam_ed *)cdm->pos.cookie.device,
1627                                          xptedtdevicefunc, arg));
1628         else
1629                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
1630 }
1631
1632 static int
1633 xptedtdevicefunc(struct cam_ed *device, void *arg)
1634 {
1635
1636         struct ccb_dev_match *cdm;
1637         dev_match_ret retval;
1638
1639         cdm = (struct ccb_dev_match *)arg;
1640
1641         /*
1642          * If our position is for something deeper in the tree, that means
1643          * that we've already seen this node.  So, we keep going down.
1644          */
1645         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1646          && (cdm->pos.cookie.device == device)
1647          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1648          && (cdm->pos.cookie.periph != NULL))
1649                 retval = DM_RET_DESCEND;
1650         else
1651                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1652                                         device);
1653
1654         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1655                 cdm->status = CAM_DEV_MATCH_ERROR;
1656                 return(0);
1657         }
1658
1659         /*
1660          * If the copy flag is set, copy this device out.
1661          */
1662         if (retval & DM_RET_COPY) {
1663                 int spaceleft, j;
1664
1665                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1666                         sizeof(struct dev_match_result));
1667
1668                 /*
1669                  * If we don't have enough space to put in another
1670                  * match result, save our position and tell the
1671                  * user there are more devices to check.
1672                  */
1673                 if (spaceleft < sizeof(struct dev_match_result)) {
1674                         bzero(&cdm->pos, sizeof(cdm->pos));
1675                         cdm->pos.position_type =
1676                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1677                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1678
1679                         cdm->pos.cookie.bus = device->target->bus;
1680                         cdm->pos.generations[CAM_BUS_GENERATION]=
1681                                 xsoftc.bus_generation;
1682                         cdm->pos.cookie.target = device->target;
1683                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1684                                 device->target->bus->generation;
1685                         cdm->pos.cookie.device = device;
1686                         cdm->pos.generations[CAM_DEV_GENERATION] =
1687                                 device->target->generation;
1688                         cdm->status = CAM_DEV_MATCH_MORE;
1689                         return(0);
1690                 }
1691                 j = cdm->num_matches;
1692                 cdm->num_matches++;
1693                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1694                 cdm->matches[j].result.device_result.path_id =
1695                         device->target->bus->path_id;
1696                 cdm->matches[j].result.device_result.target_id =
1697                         device->target->target_id;
1698                 cdm->matches[j].result.device_result.target_lun =
1699                         device->lun_id;
1700                 cdm->matches[j].result.device_result.protocol =
1701                         device->protocol;
1702                 bcopy(&device->inq_data,
1703                       &cdm->matches[j].result.device_result.inq_data,
1704                       sizeof(struct scsi_inquiry_data));
1705                 bcopy(&device->ident_data,
1706                       &cdm->matches[j].result.device_result.ident_data,
1707                       sizeof(struct ata_params));
1708
1709                 /* Let the user know whether this device is unconfigured */
1710                 if (device->flags & CAM_DEV_UNCONFIGURED)
1711                         cdm->matches[j].result.device_result.flags =
1712                                 DEV_RESULT_UNCONFIGURED;
1713                 else
1714                         cdm->matches[j].result.device_result.flags =
1715                                 DEV_RESULT_NOFLAG;
1716         }
1717
1718         /*
1719          * If the user isn't interested in peripherals, don't descend
1720          * the tree any further.
1721          */
1722         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1723                 return(1);
1724
1725         /*
1726          * If there is a peripheral list generation recorded, make sure
1727          * it hasn't changed.
1728          */
1729         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1730          && (device->target->bus == cdm->pos.cookie.bus)
1731          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1732          && (device->target == cdm->pos.cookie.target)
1733          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1734          && (device == cdm->pos.cookie.device)
1735          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1736          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1737          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1738              device->generation)){
1739                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1740                 return(0);
1741         }
1742
1743         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1744          && (cdm->pos.cookie.bus == device->target->bus)
1745          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1746          && (cdm->pos.cookie.target == device->target)
1747          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1748          && (cdm->pos.cookie.device == device)
1749          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1750          && (cdm->pos.cookie.periph != NULL))
1751                 return(xptperiphtraverse(device,
1752                                 (struct cam_periph *)cdm->pos.cookie.periph,
1753                                 xptedtperiphfunc, arg));
1754         else
1755                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
1756 }
1757
1758 static int
1759 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1760 {
1761         struct ccb_dev_match *cdm;
1762         dev_match_ret retval;
1763
1764         cdm = (struct ccb_dev_match *)arg;
1765
1766         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1767
1768         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1769                 cdm->status = CAM_DEV_MATCH_ERROR;
1770                 return(0);
1771         }
1772
1773         /*
1774          * If the copy flag is set, copy this peripheral out.
1775          */
1776         if (retval & DM_RET_COPY) {
1777                 int spaceleft, j;
1778
1779                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1780                         sizeof(struct dev_match_result));
1781
1782                 /*
1783                  * If we don't have enough space to put in another
1784                  * match result, save our position and tell the
1785                  * user there are more devices to check.
1786                  */
1787                 if (spaceleft < sizeof(struct dev_match_result)) {
1788                         bzero(&cdm->pos, sizeof(cdm->pos));
1789                         cdm->pos.position_type =
1790                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1791                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1792                                 CAM_DEV_POS_PERIPH;
1793
1794                         cdm->pos.cookie.bus = periph->path->bus;
1795                         cdm->pos.generations[CAM_BUS_GENERATION]=
1796                                 xsoftc.bus_generation;
1797                         cdm->pos.cookie.target = periph->path->target;
1798                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1799                                 periph->path->bus->generation;
1800                         cdm->pos.cookie.device = periph->path->device;
1801                         cdm->pos.generations[CAM_DEV_GENERATION] =
1802                                 periph->path->target->generation;
1803                         cdm->pos.cookie.periph = periph;
1804                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1805                                 periph->path->device->generation;
1806                         cdm->status = CAM_DEV_MATCH_MORE;
1807                         return(0);
1808                 }
1809
1810                 j = cdm->num_matches;
1811                 cdm->num_matches++;
1812                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1813                 cdm->matches[j].result.periph_result.path_id =
1814                         periph->path->bus->path_id;
1815                 cdm->matches[j].result.periph_result.target_id =
1816                         periph->path->target->target_id;
1817                 cdm->matches[j].result.periph_result.target_lun =
1818                         periph->path->device->lun_id;
1819                 cdm->matches[j].result.periph_result.unit_number =
1820                         periph->unit_number;
1821                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1822                         periph->periph_name, DEV_IDLEN);
1823         }
1824
1825         return(1);
1826 }
1827
1828 static int
1829 xptedtmatch(struct ccb_dev_match *cdm)
1830 {
1831         int ret;
1832
1833         cdm->num_matches = 0;
1834
1835         /*
1836          * Check the bus list generation.  If it has changed, the user
1837          * needs to reset everything and start over.
1838          */
1839         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1840          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
1841          && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) {
1842                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1843                 return(0);
1844         }
1845
1846         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1847          && (cdm->pos.cookie.bus != NULL))
1848                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
1849                                      xptedtbusfunc, cdm);
1850         else
1851                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
1852
1853         /*
1854          * If we get back 0, that means that we had to stop before fully
1855          * traversing the EDT.  It also means that one of the subroutines
1856          * has set the status field to the proper value.  If we get back 1,
1857          * we've fully traversed the EDT and copied out any matching entries.
1858          */
1859         if (ret == 1)
1860                 cdm->status = CAM_DEV_MATCH_LAST;
1861
1862         return(ret);
1863 }
1864
1865 static int
1866 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1867 {
1868         struct ccb_dev_match *cdm;
1869
1870         cdm = (struct ccb_dev_match *)arg;
1871
1872         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1873          && (cdm->pos.cookie.pdrv == pdrv)
1874          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1875          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1876          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1877              (*pdrv)->generation)) {
1878                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1879                 return(0);
1880         }
1881
1882         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1883          && (cdm->pos.cookie.pdrv == pdrv)
1884          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1885          && (cdm->pos.cookie.periph != NULL))
1886                 return(xptpdperiphtraverse(pdrv,
1887                                 (struct cam_periph *)cdm->pos.cookie.periph,
1888                                 xptplistperiphfunc, arg));
1889         else
1890                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
1891 }
1892
1893 static int
1894 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1895 {
1896         struct ccb_dev_match *cdm;
1897         dev_match_ret retval;
1898
1899         cdm = (struct ccb_dev_match *)arg;
1900
1901         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1902
1903         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1904                 cdm->status = CAM_DEV_MATCH_ERROR;
1905                 return(0);
1906         }
1907
1908         /*
1909          * If the copy flag is set, copy this peripheral out.
1910          */
1911         if (retval & DM_RET_COPY) {
1912                 int spaceleft, j;
1913
1914                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1915                         sizeof(struct dev_match_result));
1916
1917                 /*
1918                  * If we don't have enough space to put in another
1919                  * match result, save our position and tell the
1920                  * user there are more devices to check.
1921                  */
1922                 if (spaceleft < sizeof(struct dev_match_result)) {
1923                         struct periph_driver **pdrv;
1924
1925                         pdrv = NULL;
1926                         bzero(&cdm->pos, sizeof(cdm->pos));
1927                         cdm->pos.position_type =
1928                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1929                                 CAM_DEV_POS_PERIPH;
1930
1931                         /*
1932                          * This may look a bit non-sensical, but it is
1933                          * actually quite logical.  There are very few
1934                          * peripheral drivers, and bloating every peripheral
1935                          * structure with a pointer back to its parent
1936                          * peripheral driver linker set entry would cost
1937                          * more in the long run than doing this quick lookup.
1938                          */
1939                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1940                                 if (strcmp((*pdrv)->driver_name,
1941                                     periph->periph_name) == 0)
1942                                         break;
1943                         }
1944
1945                         if (*pdrv == NULL) {
1946                                 cdm->status = CAM_DEV_MATCH_ERROR;
1947                                 return(0);
1948                         }
1949
1950                         cdm->pos.cookie.pdrv = pdrv;
1951                         /*
1952                          * The periph generation slot does double duty, as
1953                          * does the periph pointer slot.  They are used for
1954                          * both edt and pdrv lookups and positioning.
1955                          */
1956                         cdm->pos.cookie.periph = periph;
1957                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1958                                 (*pdrv)->generation;
1959                         cdm->status = CAM_DEV_MATCH_MORE;
1960                         return(0);
1961                 }
1962
1963                 j = cdm->num_matches;
1964                 cdm->num_matches++;
1965                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1966                 cdm->matches[j].result.periph_result.path_id =
1967                         periph->path->bus->path_id;
1968
1969                 /*
1970                  * The transport layer peripheral doesn't have a target or
1971                  * lun.
1972                  */
1973                 if (periph->path->target)
1974                         cdm->matches[j].result.periph_result.target_id =
1975                                 periph->path->target->target_id;
1976                 else
1977                         cdm->matches[j].result.periph_result.target_id = -1;
1978
1979                 if (periph->path->device)
1980                         cdm->matches[j].result.periph_result.target_lun =
1981                                 periph->path->device->lun_id;
1982                 else
1983                         cdm->matches[j].result.periph_result.target_lun = -1;
1984
1985                 cdm->matches[j].result.periph_result.unit_number =
1986                         periph->unit_number;
1987                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1988                         periph->periph_name, DEV_IDLEN);
1989         }
1990
1991         return(1);
1992 }
1993
1994 static int
1995 xptperiphlistmatch(struct ccb_dev_match *cdm)
1996 {
1997         int ret;
1998
1999         cdm->num_matches = 0;
2000
2001         /*
2002          * At this point in the edt traversal function, we check the bus
2003          * list generation to make sure that no busses have been added or
2004          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2005          * For the peripheral driver list traversal function, however, we
2006          * don't have to worry about new peripheral driver types coming or
2007          * going; they're in a linker set, and therefore can't change
2008          * without a recompile.
2009          */
2010
2011         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2012          && (cdm->pos.cookie.pdrv != NULL))
2013                 ret = xptpdrvtraverse(
2014                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2015                                 xptplistpdrvfunc, cdm);
2016         else
2017                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2018
2019         /*
2020          * If we get back 0, that means that we had to stop before fully
2021          * traversing the peripheral driver tree.  It also means that one of
2022          * the subroutines has set the status field to the proper value.  If
2023          * we get back 1, we've fully traversed the EDT and copied out any
2024          * matching entries.
2025          */
2026         if (ret == 1)
2027                 cdm->status = CAM_DEV_MATCH_LAST;
2028
2029         return(ret);
2030 }
2031
2032 static int
2033 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2034 {
2035         struct cam_eb *bus, *next_bus;
2036         int retval;
2037
2038         retval = 1;
2039
2040         xpt_lock_buses();
2041         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
2042              bus != NULL;
2043              bus = next_bus) {
2044
2045                 bus->refcount++;
2046
2047                 /*
2048                  * XXX The locking here is obviously very complex.  We
2049                  * should work to simplify it.
2050                  */
2051                 xpt_unlock_buses();
2052                 CAM_SIM_LOCK(bus->sim);
2053                 retval = tr_func(bus, arg);
2054                 CAM_SIM_UNLOCK(bus->sim);
2055
2056                 xpt_lock_buses();
2057                 next_bus = TAILQ_NEXT(bus, links);
2058                 xpt_unlock_buses();
2059
2060                 xpt_release_bus(bus);
2061
2062                 if (retval == 0)
2063                         return(retval);
2064                 xpt_lock_buses();
2065         }
2066         xpt_unlock_buses();
2067
2068         return(retval);
2069 }
2070
2071 int
2072 xpt_sim_opened(struct cam_sim *sim)
2073 {
2074         struct cam_eb *bus;
2075         struct cam_et *target;
2076         struct cam_ed *device;
2077         struct cam_periph *periph;
2078
2079         KASSERT(sim->refcount >= 1, ("sim->refcount >= 1"));
2080         mtx_assert(sim->mtx, MA_OWNED);
2081
2082         xpt_lock_buses();
2083         TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
2084                 if (bus->sim != sim)
2085                         continue;
2086
2087                 TAILQ_FOREACH(target, &bus->et_entries, links) {
2088                         TAILQ_FOREACH(device, &target->ed_entries, links) {
2089                                 SLIST_FOREACH(periph, &device->periphs,
2090                                     periph_links) {
2091                                         if (periph->refcount > 0) {
2092                                                 xpt_unlock_buses();
2093                                                 return (1);
2094                                         }
2095                                 }
2096                         }
2097                 }
2098         }
2099
2100         xpt_unlock_buses();
2101         return (0);
2102 }
2103
2104 static int
2105 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2106                   xpt_targetfunc_t *tr_func, void *arg)
2107 {
2108         struct cam_et *target, *next_target;
2109         int retval;
2110
2111         mtx_assert(bus->sim->mtx, MA_OWNED);
2112         retval = 1;
2113         for (target = (start_target ? start_target :
2114                        TAILQ_FIRST(&bus->et_entries));
2115              target != NULL; target = next_target) {
2116
2117                 target->refcount++;
2118
2119                 retval = tr_func(target, arg);
2120
2121                 next_target = TAILQ_NEXT(target, links);
2122
2123                 xpt_release_target(target);
2124
2125                 if (retval == 0)
2126                         return(retval);
2127         }
2128
2129         return(retval);
2130 }
2131
2132 static int
2133 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2134                   xpt_devicefunc_t *tr_func, void *arg)
2135 {
2136         struct cam_ed *device, *next_device;
2137         int retval;
2138
2139         mtx_assert(target->bus->sim->mtx, MA_OWNED);
2140         retval = 1;
2141         for (device = (start_device ? start_device :
2142                        TAILQ_FIRST(&target->ed_entries));
2143              device != NULL;
2144              device = next_device) {
2145
2146                 /*
2147                  * Hold a reference so the current device does not go away
2148                  * on us.
2149                  */
2150                 device->refcount++;
2151
2152                 retval = tr_func(device, arg);
2153
2154                 /*
2155                  * Grab our next pointer before we release the current
2156                  * device.
2157                  */
2158                 next_device = TAILQ_NEXT(device, links);
2159
2160                 xpt_release_device(device);
2161
2162                 if (retval == 0)
2163                         return(retval);
2164         }
2165
2166         return(retval);
2167 }
2168
2169 static int
2170 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2171                   xpt_periphfunc_t *tr_func, void *arg)
2172 {
2173         struct cam_periph *periph, *next_periph;
2174         int retval;
2175
2176         retval = 1;
2177
2178         mtx_assert(device->sim->mtx, MA_OWNED);
2179         xpt_lock_buses();
2180         for (periph = (start_periph ? start_periph :
2181                        SLIST_FIRST(&device->periphs));
2182              periph != NULL;
2183              periph = next_periph) {
2184
2185
2186                 /*
2187                  * In this case, we want to show peripherals that have been
2188                  * invalidated, but not peripherals that are scheduled to
2189                  * be freed.  So instead of calling cam_periph_acquire(),
2190                  * which will fail if the periph has been invalidated, we
2191                  * just check for the free flag here.  If it is in the
2192                  * process of being freed, we skip to the next periph.
2193                  */
2194                 if (periph->flags & CAM_PERIPH_FREE) {
2195                         next_periph = SLIST_NEXT(periph, periph_links);
2196                         continue;
2197                 }
2198
2199                 /*
2200                  * Acquire a reference to this periph while we call the
2201                  * traversal function, so it can't go away.
2202                  */
2203                 periph->refcount++;
2204
2205                 retval = tr_func(periph, arg);
2206
2207                 /*
2208                  * Grab the next peripheral before we release this one, so
2209                  * our next pointer is still valid.
2210                  */
2211                 next_periph = SLIST_NEXT(periph, periph_links);
2212
2213                 cam_periph_release_locked_buses(periph);
2214
2215                 if (retval == 0)
2216                         goto bailout_done;
2217         }
2218
2219 bailout_done:
2220
2221         xpt_unlock_buses();
2222
2223         return(retval);
2224 }
2225
2226 static int
2227 xptpdrvtraverse(struct periph_driver **start_pdrv,
2228                 xpt_pdrvfunc_t *tr_func, void *arg)
2229 {
2230         struct periph_driver **pdrv;
2231         int retval;
2232
2233         retval = 1;
2234
2235         /*
2236          * We don't traverse the peripheral driver list like we do the
2237          * other lists, because it is a linker set, and therefore cannot be
2238          * changed during runtime.  If the peripheral driver list is ever
2239          * re-done to be something other than a linker set (i.e. it can
2240          * change while the system is running), the list traversal should
2241          * be modified to work like the other traversal functions.
2242          */
2243         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2244              *pdrv != NULL; pdrv++) {
2245                 retval = tr_func(pdrv, arg);
2246
2247                 if (retval == 0)
2248                         return(retval);
2249         }
2250
2251         return(retval);
2252 }
2253
2254 static int
2255 xptpdperiphtraverse(struct periph_driver **pdrv,
2256                     struct cam_periph *start_periph,
2257                     xpt_periphfunc_t *tr_func, void *arg)
2258 {
2259         struct cam_periph *periph, *next_periph;
2260         struct cam_sim *sim;
2261         int retval;
2262
2263         retval = 1;
2264
2265         xpt_lock_buses();
2266         for (periph = (start_periph ? start_periph :
2267              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2268              periph = next_periph) {
2269
2270
2271                 /*
2272                  * In this case, we want to show peripherals that have been
2273                  * invalidated, but not peripherals that are scheduled to
2274                  * be freed.  So instead of calling cam_periph_acquire(),
2275                  * which will fail if the periph has been invalidated, we
2276                  * just check for the free flag here.  If it is free, we
2277                  * skip to the next periph.
2278                  */
2279                 if (periph->flags & CAM_PERIPH_FREE) {
2280                         next_periph = TAILQ_NEXT(periph, unit_links);
2281                         continue;
2282                 }
2283
2284                 /*
2285                  * Acquire a reference to this periph while we call the
2286                  * traversal function, so it can't go away.
2287                  */
2288                 periph->refcount++;
2289                 sim = periph->sim;
2290                 xpt_unlock_buses();
2291                 CAM_SIM_LOCK(sim);
2292                 xpt_lock_buses();
2293                 retval = tr_func(periph, arg);
2294
2295                 /*
2296                  * Grab the next peripheral before we release this one, so
2297                  * our next pointer is still valid.
2298                  */
2299                 next_periph = TAILQ_NEXT(periph, unit_links);
2300
2301                 cam_periph_release_locked_buses(periph);
2302                 CAM_SIM_UNLOCK(sim);
2303
2304                 if (retval == 0)
2305                         goto bailout_done;
2306         }
2307 bailout_done:
2308
2309         xpt_unlock_buses();
2310
2311         return(retval);
2312 }
2313
2314 static int
2315 xptdefbusfunc(struct cam_eb *bus, void *arg)
2316 {
2317         struct xpt_traverse_config *tr_config;
2318
2319         tr_config = (struct xpt_traverse_config *)arg;
2320
2321         if (tr_config->depth == XPT_DEPTH_BUS) {
2322                 xpt_busfunc_t *tr_func;
2323
2324                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2325
2326                 return(tr_func(bus, tr_config->tr_arg));
2327         } else
2328                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2329 }
2330
2331 static int
2332 xptdeftargetfunc(struct cam_et *target, void *arg)
2333 {
2334         struct xpt_traverse_config *tr_config;
2335
2336         tr_config = (struct xpt_traverse_config *)arg;
2337
2338         if (tr_config->depth == XPT_DEPTH_TARGET) {
2339                 xpt_targetfunc_t *tr_func;
2340
2341                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2342
2343                 return(tr_func(target, tr_config->tr_arg));
2344         } else
2345                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2346 }
2347
2348 static int
2349 xptdefdevicefunc(struct cam_ed *device, 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_DEVICE) {
2356                 xpt_devicefunc_t *tr_func;
2357
2358                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2359
2360                 return(tr_func(device, tr_config->tr_arg));
2361         } else
2362                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2363 }
2364
2365 static int
2366 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2367 {
2368         struct xpt_traverse_config *tr_config;
2369         xpt_periphfunc_t *tr_func;
2370
2371         tr_config = (struct xpt_traverse_config *)arg;
2372
2373         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2374
2375         /*
2376          * Unlike the other default functions, we don't check for depth
2377          * here.  The peripheral driver level is the last level in the EDT,
2378          * so if we're here, we should execute the function in question.
2379          */
2380         return(tr_func(periph, tr_config->tr_arg));
2381 }
2382
2383 /*
2384  * Execute the given function for every bus in the EDT.
2385  */
2386 static int
2387 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2388 {
2389         struct xpt_traverse_config tr_config;
2390
2391         tr_config.depth = XPT_DEPTH_BUS;
2392         tr_config.tr_func = tr_func;
2393         tr_config.tr_arg = arg;
2394
2395         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2396 }
2397
2398 /*
2399  * Execute the given function for every device in the EDT.
2400  */
2401 static int
2402 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2403 {
2404         struct xpt_traverse_config tr_config;
2405
2406         tr_config.depth = XPT_DEPTH_DEVICE;
2407         tr_config.tr_func = tr_func;
2408         tr_config.tr_arg = arg;
2409
2410         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2411 }
2412
2413 static int
2414 xptsetasyncfunc(struct cam_ed *device, void *arg)
2415 {
2416         struct cam_path path;
2417         struct ccb_getdev cgd;
2418         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2419
2420         /*
2421          * Don't report unconfigured devices (Wildcard devs,
2422          * devices only for target mode, device instances
2423          * that have been invalidated but are waiting for
2424          * their last reference count to be released).
2425          */
2426         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2427                 return (1);
2428
2429         xpt_compile_path(&path,
2430                          NULL,
2431                          device->target->bus->path_id,
2432                          device->target->target_id,
2433                          device->lun_id);
2434         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2435         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2436         xpt_action((union ccb *)&cgd);
2437         csa->callback(csa->callback_arg,
2438                             AC_FOUND_DEVICE,
2439                             &path, &cgd);
2440         xpt_release_path(&path);
2441
2442         return(1);
2443 }
2444
2445 static int
2446 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2447 {
2448         struct cam_path path;
2449         struct ccb_pathinq cpi;
2450         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2451
2452         xpt_compile_path(&path, /*periph*/NULL,
2453                          bus->sim->path_id,
2454                          CAM_TARGET_WILDCARD,
2455                          CAM_LUN_WILDCARD);
2456         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2457         cpi.ccb_h.func_code = XPT_PATH_INQ;
2458         xpt_action((union ccb *)&cpi);
2459         csa->callback(csa->callback_arg,
2460                             AC_PATH_REGISTERED,
2461                             &path, &cpi);
2462         xpt_release_path(&path);
2463
2464         return(1);
2465 }
2466
2467 void
2468 xpt_action(union ccb *start_ccb)
2469 {
2470
2471         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2472
2473         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2474         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2475 }
2476
2477 void
2478 xpt_action_default(union ccb *start_ccb)
2479 {
2480         struct cam_path *path;
2481
2482         path = start_ccb->ccb_h.path;
2483         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2484
2485         switch (start_ccb->ccb_h.func_code) {
2486         case XPT_SCSI_IO:
2487         {
2488                 struct cam_ed *device;
2489
2490                 /*
2491                  * For the sake of compatibility with SCSI-1
2492                  * devices that may not understand the identify
2493                  * message, we include lun information in the
2494                  * second byte of all commands.  SCSI-1 specifies
2495                  * that luns are a 3 bit value and reserves only 3
2496                  * bits for lun information in the CDB.  Later
2497                  * revisions of the SCSI spec allow for more than 8
2498                  * luns, but have deprecated lun information in the
2499                  * CDB.  So, if the lun won't fit, we must omit.
2500                  *
2501                  * Also be aware that during initial probing for devices,
2502                  * the inquiry information is unknown but initialized to 0.
2503                  * This means that this code will be exercised while probing
2504                  * devices with an ANSI revision greater than 2.
2505                  */
2506                 device = path->device;
2507                 if (device->protocol_version <= SCSI_REV_2
2508                  && start_ccb->ccb_h.target_lun < 8
2509                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2510
2511                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2512                             start_ccb->ccb_h.target_lun << 5;
2513                 }
2514                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2515         }
2516         /* FALLTHROUGH */
2517         case XPT_TARGET_IO:
2518         case XPT_CONT_TARGET_IO:
2519                 start_ccb->csio.sense_resid = 0;
2520                 start_ccb->csio.resid = 0;
2521                 /* FALLTHROUGH */
2522         case XPT_ATA_IO:
2523                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2524                         start_ccb->ataio.resid = 0;
2525                 /* FALLTHROUGH */
2526         case XPT_RESET_DEV:
2527         case XPT_ENG_EXEC:
2528         case XPT_SMP_IO:
2529                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2530                 if (xpt_schedule_devq(path->bus->sim->devq, path->device))
2531                         xpt_run_devq(path->bus->sim->devq);
2532                 break;
2533         case XPT_CALC_GEOMETRY:
2534         {
2535                 struct cam_sim *sim;
2536
2537                 /* Filter out garbage */
2538                 if (start_ccb->ccg.block_size == 0
2539                  || start_ccb->ccg.volume_size == 0) {
2540                         start_ccb->ccg.cylinders = 0;
2541                         start_ccb->ccg.heads = 0;
2542                         start_ccb->ccg.secs_per_track = 0;
2543                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2544                         break;
2545                 }
2546 #if defined(PC98) || defined(__sparc64__)
2547                 /*
2548                  * In a PC-98 system, geometry translation depens on
2549                  * the "real" device geometry obtained from mode page 4.
2550                  * SCSI geometry translation is performed in the
2551                  * initialization routine of the SCSI BIOS and the result
2552                  * stored in host memory.  If the translation is available
2553                  * in host memory, use it.  If not, rely on the default
2554                  * translation the device driver performs.
2555                  * For sparc64, we may need adjust the geometry of large
2556                  * disks in order to fit the limitations of the 16-bit
2557                  * fields of the VTOC8 disk label.
2558                  */
2559                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2560                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2561                         break;
2562                 }
2563 #endif
2564                 sim = path->bus->sim;
2565                 (*(sim->sim_action))(sim, start_ccb);
2566                 break;
2567         }
2568         case XPT_ABORT:
2569         {
2570                 union ccb* abort_ccb;
2571
2572                 abort_ccb = start_ccb->cab.abort_ccb;
2573                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2574
2575                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2576                                 struct cam_ccbq *ccbq;
2577                                 struct cam_ed *device;
2578
2579                                 device = abort_ccb->ccb_h.path->device;
2580                                 ccbq = &device->ccbq;
2581                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2582                                 abort_ccb->ccb_h.status =
2583                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2584                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2585                                 xpt_done(abort_ccb);
2586                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2587                                 break;
2588                         }
2589                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2590                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2591                                 /*
2592                                  * We've caught this ccb en route to
2593                                  * the SIM.  Flag it for abort and the
2594                                  * SIM will do so just before starting
2595                                  * real work on the CCB.
2596                                  */
2597                                 abort_ccb->ccb_h.status =
2598                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2599                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2600                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2601                                 break;
2602                         }
2603                 }
2604                 if (XPT_FC_IS_QUEUED(abort_ccb)
2605                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2606                         /*
2607                          * It's already completed but waiting
2608                          * for our SWI to get to it.
2609                          */
2610                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2611                         break;
2612                 }
2613                 /*
2614                  * If we weren't able to take care of the abort request
2615                  * in the XPT, pass the request down to the SIM for processing.
2616                  */
2617         }
2618         /* FALLTHROUGH */
2619         case XPT_ACCEPT_TARGET_IO:
2620         case XPT_EN_LUN:
2621         case XPT_IMMED_NOTIFY:
2622         case XPT_NOTIFY_ACK:
2623         case XPT_RESET_BUS:
2624         case XPT_IMMEDIATE_NOTIFY:
2625         case XPT_NOTIFY_ACKNOWLEDGE:
2626         case XPT_GET_SIM_KNOB:
2627         case XPT_SET_SIM_KNOB:
2628         {
2629                 struct cam_sim *sim;
2630
2631                 sim = path->bus->sim;
2632                 (*(sim->sim_action))(sim, start_ccb);
2633                 break;
2634         }
2635         case XPT_PATH_INQ:
2636         {
2637                 struct cam_sim *sim;
2638
2639                 sim = path->bus->sim;
2640                 (*(sim->sim_action))(sim, start_ccb);
2641                 break;
2642         }
2643         case XPT_PATH_STATS:
2644                 start_ccb->cpis.last_reset = path->bus->last_reset;
2645                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2646                 break;
2647         case XPT_GDEV_TYPE:
2648         {
2649                 struct cam_ed *dev;
2650
2651                 dev = path->device;
2652                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2653                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2654                 } else {
2655                         struct ccb_getdev *cgd;
2656
2657                         cgd = &start_ccb->cgd;
2658                         cgd->protocol = dev->protocol;
2659                         cgd->inq_data = dev->inq_data;
2660                         cgd->ident_data = dev->ident_data;
2661                         cgd->inq_flags = dev->inq_flags;
2662                         cgd->ccb_h.status = CAM_REQ_CMP;
2663                         cgd->serial_num_len = dev->serial_num_len;
2664                         if ((dev->serial_num_len > 0)
2665                          && (dev->serial_num != NULL))
2666                                 bcopy(dev->serial_num, cgd->serial_num,
2667                                       dev->serial_num_len);
2668                 }
2669                 break;
2670         }
2671         case XPT_GDEV_STATS:
2672         {
2673                 struct cam_ed *dev;
2674
2675                 dev = path->device;
2676                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2677                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2678                 } else {
2679                         struct ccb_getdevstats *cgds;
2680                         struct cam_eb *bus;
2681                         struct cam_et *tar;
2682
2683                         cgds = &start_ccb->cgds;
2684                         bus = path->bus;
2685                         tar = path->target;
2686                         cgds->dev_openings = dev->ccbq.dev_openings;
2687                         cgds->dev_active = dev->ccbq.dev_active;
2688                         cgds->devq_openings = dev->ccbq.devq_openings;
2689                         cgds->devq_queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2690                         cgds->held = dev->ccbq.held;
2691                         cgds->last_reset = tar->last_reset;
2692                         cgds->maxtags = dev->maxtags;
2693                         cgds->mintags = dev->mintags;
2694                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2695                                 cgds->last_reset = bus->last_reset;
2696                         cgds->ccb_h.status = CAM_REQ_CMP;
2697                 }
2698                 break;
2699         }
2700         case XPT_GDEVLIST:
2701         {
2702                 struct cam_periph       *nperiph;
2703                 struct periph_list      *periph_head;
2704                 struct ccb_getdevlist   *cgdl;
2705                 u_int                   i;
2706                 struct cam_ed           *device;
2707                 int                     found;
2708
2709
2710                 found = 0;
2711
2712                 /*
2713                  * Don't want anyone mucking with our data.
2714                  */
2715                 device = path->device;
2716                 periph_head = &device->periphs;
2717                 cgdl = &start_ccb->cgdl;
2718
2719                 /*
2720                  * Check and see if the list has changed since the user
2721                  * last requested a list member.  If so, tell them that the
2722                  * list has changed, and therefore they need to start over
2723                  * from the beginning.
2724                  */
2725                 if ((cgdl->index != 0) &&
2726                     (cgdl->generation != device->generation)) {
2727                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2728                         break;
2729                 }
2730
2731                 /*
2732                  * Traverse the list of peripherals and attempt to find
2733                  * the requested peripheral.
2734                  */
2735                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2736                      (nperiph != NULL) && (i <= cgdl->index);
2737                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2738                         if (i == cgdl->index) {
2739                                 strncpy(cgdl->periph_name,
2740                                         nperiph->periph_name,
2741                                         DEV_IDLEN);
2742                                 cgdl->unit_number = nperiph->unit_number;
2743                                 found = 1;
2744                         }
2745                 }
2746                 if (found == 0) {
2747                         cgdl->status = CAM_GDEVLIST_ERROR;
2748                         break;
2749                 }
2750
2751                 if (nperiph == NULL)
2752                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2753                 else
2754                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2755
2756                 cgdl->index++;
2757                 cgdl->generation = device->generation;
2758
2759                 cgdl->ccb_h.status = CAM_REQ_CMP;
2760                 break;
2761         }
2762         case XPT_DEV_MATCH:
2763         {
2764                 dev_pos_type position_type;
2765                 struct ccb_dev_match *cdm;
2766
2767                 cdm = &start_ccb->cdm;
2768
2769                 /*
2770                  * There are two ways of getting at information in the EDT.
2771                  * The first way is via the primary EDT tree.  It starts
2772                  * with a list of busses, then a list of targets on a bus,
2773                  * then devices/luns on a target, and then peripherals on a
2774                  * device/lun.  The "other" way is by the peripheral driver
2775                  * lists.  The peripheral driver lists are organized by
2776                  * peripheral driver.  (obviously)  So it makes sense to
2777                  * use the peripheral driver list if the user is looking
2778                  * for something like "da1", or all "da" devices.  If the
2779                  * user is looking for something on a particular bus/target
2780                  * or lun, it's generally better to go through the EDT tree.
2781                  */
2782
2783                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2784                         position_type = cdm->pos.position_type;
2785                 else {
2786                         u_int i;
2787
2788                         position_type = CAM_DEV_POS_NONE;
2789
2790                         for (i = 0; i < cdm->num_patterns; i++) {
2791                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2792                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2793                                         position_type = CAM_DEV_POS_EDT;
2794                                         break;
2795                                 }
2796                         }
2797
2798                         if (cdm->num_patterns == 0)
2799                                 position_type = CAM_DEV_POS_EDT;
2800                         else if (position_type == CAM_DEV_POS_NONE)
2801                                 position_type = CAM_DEV_POS_PDRV;
2802                 }
2803
2804                 /*
2805                  * Note that we drop the SIM lock here, because the EDT
2806                  * traversal code needs to do its own locking.
2807                  */
2808                 CAM_SIM_UNLOCK(xpt_path_sim(cdm->ccb_h.path));
2809                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2810                 case CAM_DEV_POS_EDT:
2811                         xptedtmatch(cdm);
2812                         break;
2813                 case CAM_DEV_POS_PDRV:
2814                         xptperiphlistmatch(cdm);
2815                         break;
2816                 default:
2817                         cdm->status = CAM_DEV_MATCH_ERROR;
2818                         break;
2819                 }
2820                 CAM_SIM_LOCK(xpt_path_sim(cdm->ccb_h.path));
2821
2822                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2823                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2824                 else
2825                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2826
2827                 break;
2828         }
2829         case XPT_SASYNC_CB:
2830         {
2831                 struct ccb_setasync *csa;
2832                 struct async_node *cur_entry;
2833                 struct async_list *async_head;
2834                 u_int32_t added;
2835
2836                 csa = &start_ccb->csa;
2837                 added = csa->event_enable;
2838                 async_head = &path->device->asyncs;
2839
2840                 /*
2841                  * If there is already an entry for us, simply
2842                  * update it.
2843                  */
2844                 cur_entry = SLIST_FIRST(async_head);
2845                 while (cur_entry != NULL) {
2846                         if ((cur_entry->callback_arg == csa->callback_arg)
2847                          && (cur_entry->callback == csa->callback))
2848                                 break;
2849                         cur_entry = SLIST_NEXT(cur_entry, links);
2850                 }
2851
2852                 if (cur_entry != NULL) {
2853                         /*
2854                          * If the request has no flags set,
2855                          * remove the entry.
2856                          */
2857                         added &= ~cur_entry->event_enable;
2858                         if (csa->event_enable == 0) {
2859                                 SLIST_REMOVE(async_head, cur_entry,
2860                                              async_node, links);
2861                                 xpt_release_device(path->device);
2862                                 free(cur_entry, M_CAMXPT);
2863                         } else {
2864                                 cur_entry->event_enable = csa->event_enable;
2865                         }
2866                         csa->event_enable = added;
2867                 } else {
2868                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2869                                            M_NOWAIT);
2870                         if (cur_entry == NULL) {
2871                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2872                                 break;
2873                         }
2874                         cur_entry->event_enable = csa->event_enable;
2875                         cur_entry->callback_arg = csa->callback_arg;
2876                         cur_entry->callback = csa->callback;
2877                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2878                         xpt_acquire_device(path->device);
2879                 }
2880                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2881                 break;
2882         }
2883         case XPT_REL_SIMQ:
2884         {
2885                 struct ccb_relsim *crs;
2886                 struct cam_ed *dev;
2887
2888                 crs = &start_ccb->crs;
2889                 dev = path->device;
2890                 if (dev == NULL) {
2891
2892                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2893                         break;
2894                 }
2895
2896                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2897
2898                         /* Don't ever go below one opening */
2899                         if (crs->openings > 0) {
2900                                 xpt_dev_ccbq_resize(path, crs->openings);
2901                                 if (bootverbose) {
2902                                         xpt_print(path,
2903                                             "number of openings is now %d\n",
2904                                             crs->openings);
2905                                 }
2906                         }
2907                 }
2908
2909                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2910
2911                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2912
2913                                 /*
2914                                  * Just extend the old timeout and decrement
2915                                  * the freeze count so that a single timeout
2916                                  * is sufficient for releasing the queue.
2917                                  */
2918                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2919                                 callout_stop(&dev->callout);
2920                         } else {
2921
2922                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2923                         }
2924
2925                         callout_reset(&dev->callout,
2926                             (crs->release_timeout * hz) / 1000,
2927                             xpt_release_devq_timeout, dev);
2928
2929                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2930
2931                 }
2932
2933                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2934
2935                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2936                                 /*
2937                                  * Decrement the freeze count so that a single
2938                                  * completion is still sufficient to unfreeze
2939                                  * the queue.
2940                                  */
2941                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2942                         } else {
2943
2944                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2945                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2946                         }
2947                 }
2948
2949                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2950
2951                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2952                          || (dev->ccbq.dev_active == 0)) {
2953
2954                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2955                         } else {
2956
2957                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2958                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2959                         }
2960                 }
2961
2962                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2963                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2964                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2965                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2966                 break;
2967         }
2968         case XPT_DEBUG: {
2969                 struct cam_path *oldpath;
2970                 struct cam_sim *oldsim;
2971
2972                 /* Check that all request bits are supported. */
2973                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2974                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2975                         break;
2976                 }
2977
2978                 cam_dflags = CAM_DEBUG_NONE;
2979                 if (cam_dpath != NULL) {
2980                         /* To release the old path we must hold proper lock. */
2981                         oldpath = cam_dpath;
2982                         cam_dpath = NULL;
2983                         oldsim = xpt_path_sim(oldpath);
2984                         CAM_SIM_UNLOCK(xpt_path_sim(start_ccb->ccb_h.path));
2985                         CAM_SIM_LOCK(oldsim);
2986                         xpt_free_path(oldpath);
2987                         CAM_SIM_UNLOCK(oldsim);
2988                         CAM_SIM_LOCK(xpt_path_sim(start_ccb->ccb_h.path));
2989                 }
2990                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2991                         if (xpt_create_path(&cam_dpath, NULL,
2992                                             start_ccb->ccb_h.path_id,
2993                                             start_ccb->ccb_h.target_id,
2994                                             start_ccb->ccb_h.target_lun) !=
2995                                             CAM_REQ_CMP) {
2996                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2997                         } else {
2998                                 cam_dflags = start_ccb->cdbg.flags;
2999                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3000                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3001                                     cam_dflags);
3002                         }
3003                 } else
3004                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3005                 break;
3006         }
3007         case XPT_NOOP:
3008                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3009                         xpt_freeze_devq(path, 1);
3010                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3011                 break;
3012         default:
3013         case XPT_SDEV_TYPE:
3014         case XPT_TERM_IO:
3015         case XPT_ENG_INQ:
3016                 /* XXX Implement */
3017                 printf("%s: CCB type %#x not supported\n", __func__,
3018                        start_ccb->ccb_h.func_code);
3019                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3020                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3021                         xpt_done(start_ccb);
3022                 }
3023                 break;
3024         }
3025 }
3026
3027 void
3028 xpt_polled_action(union ccb *start_ccb)
3029 {
3030         u_int32_t timeout;
3031         struct    cam_sim *sim;
3032         struct    cam_devq *devq;
3033         struct    cam_ed *dev;
3034
3035
3036         timeout = start_ccb->ccb_h.timeout * 10;
3037         sim = start_ccb->ccb_h.path->bus->sim;
3038         devq = sim->devq;
3039         dev = start_ccb->ccb_h.path->device;
3040
3041         mtx_assert(sim->mtx, MA_OWNED);
3042
3043         /* Don't use ISR for this SIM while polling. */
3044         sim->flags |= CAM_SIM_POLLED;
3045
3046         /*
3047          * Steal an opening so that no other queued requests
3048          * can get it before us while we simulate interrupts.
3049          */
3050         dev->ccbq.devq_openings--;
3051         dev->ccbq.dev_openings--;
3052
3053         while(((devq != NULL && devq->send_openings <= 0) ||
3054            dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3055                 DELAY(100);
3056                 (*(sim->sim_poll))(sim);
3057                 camisr_runqueue(sim);
3058         }
3059
3060         dev->ccbq.devq_openings++;
3061         dev->ccbq.dev_openings++;
3062
3063         if (timeout != 0) {
3064                 xpt_action(start_ccb);
3065                 while(--timeout > 0) {
3066                         (*(sim->sim_poll))(sim);
3067                         camisr_runqueue(sim);
3068                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3069                             != CAM_REQ_INPROG)
3070                                 break;
3071                         DELAY(100);
3072                 }
3073                 if (timeout == 0) {
3074                         /*
3075                          * XXX Is it worth adding a sim_timeout entry
3076                          * point so we can attempt recovery?  If
3077                          * this is only used for dumps, I don't think
3078                          * it is.
3079                          */
3080                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3081                 }
3082         } else {
3083                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3084         }
3085
3086         /* We will use CAM ISR for this SIM again. */
3087         sim->flags &= ~CAM_SIM_POLLED;
3088 }
3089
3090 /*
3091  * Schedule a peripheral driver to receive a ccb when it's
3092  * target device has space for more transactions.
3093  */
3094 void
3095 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3096 {
3097         struct cam_ed *device;
3098         int runq = 0;
3099
3100         mtx_assert(perph->sim->mtx, MA_OWNED);
3101
3102         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3103         device = perph->path->device;
3104         if (periph_is_queued(perph)) {
3105                 /* Simply reorder based on new priority */
3106                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3107                           ("   change priority to %d\n", new_priority));
3108                 if (new_priority < perph->pinfo.priority) {
3109                         camq_change_priority(&device->drvq,
3110                                              perph->pinfo.index,
3111                                              new_priority);
3112                         runq = 1;
3113                 }
3114         } else {
3115                 /* New entry on the queue */
3116                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3117                           ("   added periph to queue\n"));
3118                 perph->pinfo.priority = new_priority;
3119                 perph->pinfo.generation = ++device->drvq.generation;
3120                 camq_insert(&device->drvq, &perph->pinfo);
3121                 runq = 1;
3122         }
3123         if (runq != 0) {
3124                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3125                           ("   calling xpt_run_dev_allocq\n"));
3126                 xpt_run_dev_allocq(device);
3127         }
3128 }
3129
3130
3131 /*
3132  * Schedule a device to run on a given queue.
3133  * If the device was inserted as a new entry on the queue,
3134  * return 1 meaning the device queue should be run. If we
3135  * were already queued, implying someone else has already
3136  * started the queue, return 0 so the caller doesn't attempt
3137  * to run the queue.
3138  */
3139 int
3140 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3141                  u_int32_t new_priority)
3142 {
3143         int retval;
3144         u_int32_t old_priority;
3145
3146         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3147
3148         old_priority = pinfo->priority;
3149
3150         /*
3151          * Are we already queued?
3152          */
3153         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3154                 /* Simply reorder based on new priority */
3155                 if (new_priority < old_priority) {
3156                         camq_change_priority(queue, pinfo->index,
3157                                              new_priority);
3158                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3159                                         ("changed priority to %d\n",
3160                                          new_priority));
3161                         retval = 1;
3162                 } else
3163                         retval = 0;
3164         } else {
3165                 /* New entry on the queue */
3166                 if (new_priority < old_priority)
3167                         pinfo->priority = new_priority;
3168
3169                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3170                                 ("Inserting onto queue\n"));
3171                 pinfo->generation = ++queue->generation;
3172                 camq_insert(queue, pinfo);
3173                 retval = 1;
3174         }
3175         return (retval);
3176 }
3177
3178 static void
3179 xpt_run_dev_allocq(struct cam_ed *device)
3180 {
3181         struct camq     *drvq;
3182
3183         if (device->ccbq.devq_allocating)
3184                 return;
3185         device->ccbq.devq_allocating = 1;
3186         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq(%p)\n", device));
3187         drvq = &device->drvq;
3188         while ((drvq->entries > 0) &&
3189             (device->ccbq.devq_openings > 0 ||
3190              CAMQ_GET_PRIO(drvq) <= CAM_PRIORITY_OOB) &&
3191             (device->ccbq.queue.qfrozen_cnt == 0)) {
3192                 union   ccb *work_ccb;
3193                 struct  cam_periph *drv;
3194
3195                 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: "
3196                     "Device on queue without any work to do"));
3197                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3198                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3199                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3200                                       drv->pinfo.priority);
3201                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3202                                         ("calling periph start\n"));
3203                         drv->periph_start(drv, work_ccb);
3204                 } else {
3205                         /*
3206                          * Malloc failure in alloc_ccb
3207                          */
3208                         /*
3209                          * XXX add us to a list to be run from free_ccb
3210                          * if we don't have any ccbs active on this
3211                          * device queue otherwise we may never get run
3212                          * again.
3213                          */
3214                         break;
3215                 }
3216         }
3217         device->ccbq.devq_allocating = 0;
3218 }
3219
3220 static void
3221 xpt_run_devq(struct cam_devq *devq)
3222 {
3223         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3224
3225         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3226
3227         devq->send_queue.qfrozen_cnt++;
3228         while ((devq->send_queue.entries > 0)
3229             && (devq->send_openings > 0)
3230             && (devq->send_queue.qfrozen_cnt <= 1)) {
3231                 struct  cam_ed_qinfo *qinfo;
3232                 struct  cam_ed *device;
3233                 union ccb *work_ccb;
3234                 struct  cam_sim *sim;
3235
3236                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3237                                                            CAMQ_HEAD);
3238                 device = qinfo->device;
3239                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3240                                 ("running device %p\n", device));
3241
3242                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3243                 if (work_ccb == NULL) {
3244                         printf("device on run queue with no ccbs???\n");
3245                         continue;
3246                 }
3247
3248                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3249
3250                         mtx_lock(&xsoftc.xpt_lock);
3251                         if (xsoftc.num_highpower <= 0) {
3252                                 /*
3253                                  * We got a high power command, but we
3254                                  * don't have any available slots.  Freeze
3255                                  * the device queue until we have a slot
3256                                  * available.
3257                                  */
3258                                 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3259                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq,
3260                                                    work_ccb->ccb_h.path->device,
3261                                                    highpowerq_entry);
3262
3263                                 mtx_unlock(&xsoftc.xpt_lock);
3264                                 continue;
3265                         } else {
3266                                 /*
3267                                  * Consume a high power slot while
3268                                  * this ccb runs.
3269                                  */
3270                                 xsoftc.num_highpower--;
3271                         }
3272                         mtx_unlock(&xsoftc.xpt_lock);
3273                 }
3274                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3275                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3276
3277                 devq->send_openings--;
3278                 devq->send_active++;
3279
3280                 xpt_schedule_devq(devq, device);
3281
3282                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3283                         /*
3284                          * The client wants to freeze the queue
3285                          * after this CCB is sent.
3286                          */
3287                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3288                 }
3289
3290                 /* In Target mode, the peripheral driver knows best... */
3291                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3292                         if ((device->inq_flags & SID_CmdQue) != 0
3293                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3294                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3295                         else
3296                                 /*
3297                                  * Clear this in case of a retried CCB that
3298                                  * failed due to a rejected tag.
3299                                  */
3300                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3301                 }
3302
3303                 switch (work_ccb->ccb_h.func_code) {
3304                 case XPT_SCSI_IO:
3305                         CAM_DEBUG(work_ccb->ccb_h.path,
3306                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3307                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3308                                           &device->inq_data),
3309                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3310                                              cdb_str, sizeof(cdb_str))));
3311                         break;
3312                 case XPT_ATA_IO:
3313                         CAM_DEBUG(work_ccb->ccb_h.path,
3314                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3315                              ata_op_string(&work_ccb->ataio.cmd),
3316                              ata_cmd_string(&work_ccb->ataio.cmd,
3317                                             cdb_str, sizeof(cdb_str))));
3318                         break;
3319                 default:
3320                         break;
3321                 }
3322
3323                 /*
3324                  * Device queues can be shared among multiple sim instances
3325                  * that reside on different busses.  Use the SIM in the queue
3326                  * CCB's path, rather than the one in the bus that was passed
3327                  * into this function.
3328                  */
3329                 sim = work_ccb->ccb_h.path->bus->sim;
3330                 (*(sim->sim_action))(sim, work_ccb);
3331         }
3332         devq->send_queue.qfrozen_cnt--;
3333 }
3334
3335 /*
3336  * This function merges stuff from the slave ccb into the master ccb, while
3337  * keeping important fields in the master ccb constant.
3338  */
3339 void
3340 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3341 {
3342
3343         /*
3344          * Pull fields that are valid for peripheral drivers to set
3345          * into the master CCB along with the CCB "payload".
3346          */
3347         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3348         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3349         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3350         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3351         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3352               sizeof(union ccb) - sizeof(struct ccb_hdr));
3353 }
3354
3355 void
3356 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3357 {
3358
3359         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3360         ccb_h->pinfo.priority = priority;
3361         ccb_h->path = path;
3362         ccb_h->path_id = path->bus->path_id;
3363         if (path->target)
3364                 ccb_h->target_id = path->target->target_id;
3365         else
3366                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3367         if (path->device) {
3368                 ccb_h->target_lun = path->device->lun_id;
3369                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3370         } else {
3371                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3372         }
3373         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3374         ccb_h->flags = 0;
3375 }
3376
3377 /* Path manipulation functions */
3378 cam_status
3379 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3380                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3381 {
3382         struct     cam_path *path;
3383         cam_status status;
3384
3385         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3386
3387         if (path == NULL) {
3388                 status = CAM_RESRC_UNAVAIL;
3389                 return(status);
3390         }
3391         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3392         if (status != CAM_REQ_CMP) {
3393                 free(path, M_CAMPATH);
3394                 path = NULL;
3395         }
3396         *new_path_ptr = path;
3397         return (status);
3398 }
3399
3400 cam_status
3401 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3402                          struct cam_periph *periph, path_id_t path_id,
3403                          target_id_t target_id, lun_id_t lun_id)
3404 {
3405         struct     cam_path *path;
3406         struct     cam_eb *bus = NULL;
3407         cam_status status;
3408
3409         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_WAITOK);
3410
3411         bus = xpt_find_bus(path_id);
3412         if (bus != NULL)
3413                 CAM_SIM_LOCK(bus->sim);
3414         status = xpt_compile_path(path, periph, path_id, target_id, lun_id);
3415         if (bus != NULL) {
3416                 CAM_SIM_UNLOCK(bus->sim);
3417                 xpt_release_bus(bus);
3418         }
3419         if (status != CAM_REQ_CMP) {
3420                 free(path, M_CAMPATH);
3421                 path = NULL;
3422         }
3423         *new_path_ptr = path;
3424         return (status);
3425 }
3426
3427 cam_status
3428 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3429                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3430 {
3431         struct       cam_eb *bus;
3432         struct       cam_et *target;
3433         struct       cam_ed *device;
3434         cam_status   status;
3435
3436         status = CAM_REQ_CMP;   /* Completed without error */
3437         target = NULL;          /* Wildcarded */
3438         device = NULL;          /* Wildcarded */
3439
3440         /*
3441          * We will potentially modify the EDT, so block interrupts
3442          * that may attempt to create cam paths.
3443          */
3444         bus = xpt_find_bus(path_id);
3445         if (bus == NULL) {
3446                 status = CAM_PATH_INVALID;
3447         } else {
3448                 target = xpt_find_target(bus, target_id);
3449                 if (target == NULL) {
3450                         /* Create one */
3451                         struct cam_et *new_target;
3452
3453                         new_target = xpt_alloc_target(bus, target_id);
3454                         if (new_target == NULL) {
3455                                 status = CAM_RESRC_UNAVAIL;
3456                         } else {
3457                                 target = new_target;
3458                         }
3459                 }
3460                 if (target != NULL) {
3461                         device = xpt_find_device(target, lun_id);
3462                         if (device == NULL) {
3463                                 /* Create one */
3464                                 struct cam_ed *new_device;
3465
3466                                 new_device =
3467                                     (*(bus->xport->alloc_device))(bus,
3468                                                                       target,
3469                                                                       lun_id);
3470                                 if (new_device == NULL) {
3471                                         status = CAM_RESRC_UNAVAIL;
3472                                 } else {
3473                                         device = new_device;
3474                                 }
3475                         }
3476                 }
3477         }
3478
3479         /*
3480          * Only touch the user's data if we are successful.
3481          */
3482         if (status == CAM_REQ_CMP) {
3483                 new_path->periph = perph;
3484                 new_path->bus = bus;
3485                 new_path->target = target;
3486                 new_path->device = device;
3487                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3488         } else {
3489                 if (device != NULL)
3490                         xpt_release_device(device);
3491                 if (target != NULL)
3492                         xpt_release_target(target);
3493                 if (bus != NULL)
3494                         xpt_release_bus(bus);
3495         }
3496         return (status);
3497 }
3498
3499 void
3500 xpt_release_path(struct cam_path *path)
3501 {
3502         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3503         if (path->device != NULL) {
3504                 xpt_release_device(path->device);
3505                 path->device = NULL;
3506         }
3507         if (path->target != NULL) {
3508                 xpt_release_target(path->target);
3509                 path->target = NULL;
3510         }
3511         if (path->bus != NULL) {
3512                 xpt_release_bus(path->bus);
3513                 path->bus = NULL;
3514         }
3515 }
3516
3517 void
3518 xpt_free_path(struct cam_path *path)
3519 {
3520
3521         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3522         xpt_release_path(path);
3523         free(path, M_CAMPATH);
3524 }
3525
3526 void
3527 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3528     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3529 {
3530
3531         xpt_lock_buses();
3532         if (bus_ref) {
3533                 if (path->bus)
3534                         *bus_ref = path->bus->refcount;
3535                 else
3536                         *bus_ref = 0;
3537         }
3538         if (periph_ref) {
3539                 if (path->periph)
3540                         *periph_ref = path->periph->refcount;
3541                 else
3542                         *periph_ref = 0;
3543         }
3544         xpt_unlock_buses();
3545         if (target_ref) {
3546                 if (path->target)
3547                         *target_ref = path->target->refcount;
3548                 else
3549                         *target_ref = 0;
3550         }
3551         if (device_ref) {
3552                 if (path->device)
3553                         *device_ref = path->device->refcount;
3554                 else
3555                         *device_ref = 0;
3556         }
3557 }
3558
3559 /*
3560  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3561  * in path1, 2 for match with wildcards in path2.
3562  */
3563 int
3564 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3565 {
3566         int retval = 0;
3567
3568         if (path1->bus != path2->bus) {
3569                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3570                         retval = 1;
3571                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3572                         retval = 2;
3573                 else
3574                         return (-1);
3575         }
3576         if (path1->target != path2->target) {
3577                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3578                         if (retval == 0)
3579                                 retval = 1;
3580                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3581                         retval = 2;
3582                 else
3583                         return (-1);
3584         }
3585         if (path1->device != path2->device) {
3586                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3587                         if (retval == 0)
3588                                 retval = 1;
3589                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3590                         retval = 2;
3591                 else
3592                         return (-1);
3593         }
3594         return (retval);
3595 }
3596
3597 int
3598 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3599 {
3600         int retval = 0;
3601
3602         if (path->bus != dev->target->bus) {
3603                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3604                         retval = 1;
3605                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3606                         retval = 2;
3607                 else
3608                         return (-1);
3609         }
3610         if (path->target != dev->target) {
3611                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3612                         if (retval == 0)
3613                                 retval = 1;
3614                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3615                         retval = 2;
3616                 else
3617                         return (-1);
3618         }
3619         if (path->device != dev) {
3620                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3621                         if (retval == 0)
3622                                 retval = 1;
3623                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3624                         retval = 2;
3625                 else
3626                         return (-1);
3627         }
3628         return (retval);
3629 }
3630
3631 void
3632 xpt_print_path(struct cam_path *path)
3633 {
3634
3635         if (path == NULL)
3636                 printf("(nopath): ");
3637         else {
3638                 if (path->periph != NULL)
3639                         printf("(%s%d:", path->periph->periph_name,
3640                                path->periph->unit_number);
3641                 else
3642                         printf("(noperiph:");
3643
3644                 if (path->bus != NULL)
3645                         printf("%s%d:%d:", path->bus->sim->sim_name,
3646                                path->bus->sim->unit_number,
3647                                path->bus->sim->bus_id);
3648                 else
3649                         printf("nobus:");
3650
3651                 if (path->target != NULL)
3652                         printf("%d:", path->target->target_id);
3653                 else
3654                         printf("X:");
3655
3656                 if (path->device != NULL)
3657                         printf("%d): ", path->device->lun_id);
3658                 else
3659                         printf("X): ");
3660         }
3661 }
3662
3663 void
3664 xpt_print_device(struct cam_ed *device)
3665 {
3666
3667         if (device == NULL)
3668                 printf("(nopath): ");
3669         else {
3670                 printf("(noperiph:%s%d:%d:%d:%d): ", device->sim->sim_name,
3671                        device->sim->unit_number,
3672                        device->sim->bus_id,
3673                        device->target->target_id,
3674                        device->lun_id);
3675         }
3676 }
3677
3678 void
3679 xpt_print(struct cam_path *path, const char *fmt, ...)
3680 {
3681         va_list ap;
3682         xpt_print_path(path);
3683         va_start(ap, fmt);
3684         vprintf(fmt, ap);
3685         va_end(ap);
3686 }
3687
3688 int
3689 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3690 {
3691         struct sbuf sb;
3692
3693 #ifdef INVARIANTS
3694         if (path != NULL && path->bus != NULL)
3695                 mtx_assert(path->bus->sim->mtx, MA_OWNED);
3696 #endif
3697
3698         sbuf_new(&sb, str, str_len, 0);
3699
3700         if (path == NULL)
3701                 sbuf_printf(&sb, "(nopath): ");
3702         else {
3703                 if (path->periph != NULL)
3704                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3705                                     path->periph->unit_number);
3706                 else
3707                         sbuf_printf(&sb, "(noperiph:");
3708
3709                 if (path->bus != NULL)
3710                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3711                                     path->bus->sim->unit_number,
3712                                     path->bus->sim->bus_id);
3713                 else
3714                         sbuf_printf(&sb, "nobus:");
3715
3716                 if (path->target != NULL)
3717                         sbuf_printf(&sb, "%d:", path->target->target_id);
3718                 else
3719                         sbuf_printf(&sb, "X:");
3720
3721                 if (path->device != NULL)
3722                         sbuf_printf(&sb, "%d): ", path->device->lun_id);
3723                 else
3724                         sbuf_printf(&sb, "X): ");
3725         }
3726         sbuf_finish(&sb);
3727
3728         return(sbuf_len(&sb));
3729 }
3730
3731 path_id_t
3732 xpt_path_path_id(struct cam_path *path)
3733 {
3734         return(path->bus->path_id);
3735 }
3736
3737 target_id_t
3738 xpt_path_target_id(struct cam_path *path)
3739 {
3740         if (path->target != NULL)
3741                 return (path->target->target_id);
3742         else
3743                 return (CAM_TARGET_WILDCARD);
3744 }
3745
3746 lun_id_t
3747 xpt_path_lun_id(struct cam_path *path)
3748 {
3749         if (path->device != NULL)
3750                 return (path->device->lun_id);
3751         else
3752                 return (CAM_LUN_WILDCARD);
3753 }
3754
3755 struct cam_sim *
3756 xpt_path_sim(struct cam_path *path)
3757 {
3758
3759         return (path->bus->sim);
3760 }
3761
3762 struct cam_periph*
3763 xpt_path_periph(struct cam_path *path)
3764 {
3765         mtx_assert(path->bus->sim->mtx, MA_OWNED);
3766
3767         return (path->periph);
3768 }
3769
3770 int
3771 xpt_path_legacy_ata_id(struct cam_path *path)
3772 {
3773         struct cam_eb *bus;
3774         int bus_id;
3775
3776         if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3777             strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3778             strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3779             strcmp(path->bus->sim->sim_name, "siisch") != 0)
3780                 return (-1);
3781
3782         if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3783             path->bus->sim->unit_number < 2) {
3784                 bus_id = path->bus->sim->unit_number;
3785         } else {
3786                 bus_id = 2;
3787                 xpt_lock_buses();
3788                 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3789                         if (bus == path->bus)
3790                                 break;
3791                         if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3792                              bus->sim->unit_number >= 2) ||
3793                             strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3794                             strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3795                             strcmp(bus->sim->sim_name, "siisch") == 0)
3796                                 bus_id++;
3797                 }
3798                 xpt_unlock_buses();
3799         }
3800         if (path->target != NULL) {
3801                 if (path->target->target_id < 2)
3802                         return (bus_id * 2 + path->target->target_id);
3803                 else
3804                         return (-1);
3805         } else
3806                 return (bus_id * 2);
3807 }
3808
3809 /*
3810  * Release a CAM control block for the caller.  Remit the cost of the structure
3811  * to the device referenced by the path.  If the this device had no 'credits'
3812  * and peripheral drivers have registered async callbacks for this notification
3813  * call them now.
3814  */
3815 void
3816 xpt_release_ccb(union ccb *free_ccb)
3817 {
3818         struct   cam_path *path;
3819         struct   cam_ed *device;
3820         struct   cam_eb *bus;
3821         struct   cam_sim *sim;
3822
3823         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3824         path = free_ccb->ccb_h.path;
3825         device = path->device;
3826         bus = path->bus;
3827         sim = bus->sim;
3828
3829         mtx_assert(sim->mtx, MA_OWNED);
3830
3831         cam_ccbq_release_opening(&device->ccbq);
3832         if (sim->ccb_count > sim->max_ccbs) {
3833                 xpt_free_ccb(free_ccb);
3834                 sim->ccb_count--;
3835         } else {
3836                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h,
3837                     xpt_links.sle);
3838         }
3839         xpt_run_dev_allocq(device);
3840 }
3841
3842 /* Functions accessed by SIM drivers */
3843
3844 static struct xpt_xport xport_default = {
3845         .alloc_device = xpt_alloc_device_default,
3846         .action = xpt_action_default,
3847         .async = xpt_dev_async_default,
3848 };
3849
3850 /*
3851  * A sim structure, listing the SIM entry points and instance
3852  * identification info is passed to xpt_bus_register to hook the SIM
3853  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3854  * for this new bus and places it in the array of busses and assigns
3855  * it a path_id.  The path_id may be influenced by "hard wiring"
3856  * information specified by the user.  Once interrupt services are
3857  * available, the bus will be probed.
3858  */
3859 int32_t
3860 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3861 {
3862         struct cam_eb *new_bus;
3863         struct cam_eb *old_bus;
3864         struct ccb_pathinq cpi;
3865         struct cam_path *path;
3866         cam_status status;
3867
3868         mtx_assert(sim->mtx, MA_OWNED);
3869
3870         sim->bus_id = bus;
3871         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3872                                           M_CAMXPT, M_NOWAIT);
3873         if (new_bus == NULL) {
3874                 /* Couldn't satisfy request */
3875                 return (CAM_RESRC_UNAVAIL);
3876         }
3877         if (strcmp(sim->sim_name, "xpt") != 0) {
3878                 sim->path_id =
3879                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3880         }
3881
3882         TAILQ_INIT(&new_bus->et_entries);
3883         new_bus->path_id = sim->path_id;
3884         cam_sim_hold(sim);
3885         new_bus->sim = sim;
3886         timevalclear(&new_bus->last_reset);
3887         new_bus->flags = 0;
3888         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3889         new_bus->generation = 0;
3890
3891         xpt_lock_buses();
3892         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3893         while (old_bus != NULL
3894             && old_bus->path_id < new_bus->path_id)
3895                 old_bus = TAILQ_NEXT(old_bus, links);
3896         if (old_bus != NULL)
3897                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3898         else
3899                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3900         xsoftc.bus_generation++;
3901         xpt_unlock_buses();
3902
3903         /*
3904          * Set a default transport so that a PATH_INQ can be issued to
3905          * the SIM.  This will then allow for probing and attaching of
3906          * a more appropriate transport.
3907          */
3908         new_bus->xport = &xport_default;
3909
3910         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3911                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3912         if (status != CAM_REQ_CMP) {
3913                 xpt_release_bus(new_bus);
3914                 free(path, M_CAMXPT);
3915                 return (CAM_RESRC_UNAVAIL);
3916         }
3917
3918         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3919         cpi.ccb_h.func_code = XPT_PATH_INQ;
3920         xpt_action((union ccb *)&cpi);
3921
3922         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3923                 switch (cpi.transport) {
3924                 case XPORT_SPI:
3925                 case XPORT_SAS:
3926                 case XPORT_FC:
3927                 case XPORT_USB:
3928                 case XPORT_ISCSI:
3929                 case XPORT_PPB:
3930                         new_bus->xport = scsi_get_xport();
3931                         break;
3932                 case XPORT_ATA:
3933                 case XPORT_SATA:
3934                         new_bus->xport = ata_get_xport();
3935                         break;
3936                 default:
3937                         new_bus->xport = &xport_default;
3938                         break;
3939                 }
3940         }
3941
3942         /* Notify interested parties */
3943         if (sim->path_id != CAM_XPT_PATH_ID) {
3944
3945                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3946                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3947                         union   ccb *scan_ccb;
3948
3949                         /* Initiate bus rescan. */
3950                         scan_ccb = xpt_alloc_ccb_nowait();
3951                         if (scan_ccb != NULL) {
3952                                 scan_ccb->ccb_h.path = path;
3953                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3954                                 scan_ccb->crcn.flags = 0;
3955                                 xpt_rescan(scan_ccb);
3956                         } else
3957                                 xpt_print(path,
3958                                           "Can't allocate CCB to scan bus\n");
3959                 } else
3960                         xpt_free_path(path);
3961         } else
3962                 xpt_free_path(path);
3963         return (CAM_SUCCESS);
3964 }
3965
3966 int32_t
3967 xpt_bus_deregister(path_id_t pathid)
3968 {
3969         struct cam_path bus_path;
3970         cam_status status;
3971
3972         status = xpt_compile_path(&bus_path, NULL, pathid,
3973                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3974         if (status != CAM_REQ_CMP)
3975                 return (status);
3976
3977         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3978         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3979
3980         /* Release the reference count held while registered. */
3981         xpt_release_bus(bus_path.bus);
3982         xpt_release_path(&bus_path);
3983
3984         return (CAM_REQ_CMP);
3985 }
3986
3987 static path_id_t
3988 xptnextfreepathid(void)
3989 {
3990         struct cam_eb *bus;
3991         path_id_t pathid;
3992         const char *strval;
3993
3994         pathid = 0;
3995         xpt_lock_buses();
3996         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3997 retry:
3998         /* Find an unoccupied pathid */
3999         while (bus != NULL && bus->path_id <= pathid) {
4000                 if (bus->path_id == pathid)
4001                         pathid++;
4002                 bus = TAILQ_NEXT(bus, links);
4003         }
4004         xpt_unlock_buses();
4005
4006         /*
4007          * Ensure that this pathid is not reserved for
4008          * a bus that may be registered in the future.
4009          */
4010         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4011                 ++pathid;
4012                 /* Start the search over */
4013                 xpt_lock_buses();
4014                 goto retry;
4015         }
4016         return (pathid);
4017 }
4018
4019 static path_id_t
4020 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4021 {
4022         path_id_t pathid;
4023         int i, dunit, val;
4024         char buf[32];
4025         const char *dname;
4026
4027         pathid = CAM_XPT_PATH_ID;
4028         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4029         i = 0;
4030         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4031                 if (strcmp(dname, "scbus")) {
4032                         /* Avoid a bit of foot shooting. */
4033                         continue;
4034                 }
4035                 if (dunit < 0)          /* unwired?! */
4036                         continue;
4037                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4038                         if (sim_bus == val) {
4039                                 pathid = dunit;
4040                                 break;
4041                         }
4042                 } else if (sim_bus == 0) {
4043                         /* Unspecified matches bus 0 */
4044                         pathid = dunit;
4045                         break;
4046                 } else {
4047                         printf("Ambiguous scbus configuration for %s%d "
4048                                "bus %d, cannot wire down.  The kernel "
4049                                "config entry for scbus%d should "
4050                                "specify a controller bus.\n"
4051                                "Scbus will be assigned dynamically.\n",
4052                                sim_name, sim_unit, sim_bus, dunit);
4053                         break;
4054                 }
4055         }
4056
4057         if (pathid == CAM_XPT_PATH_ID)
4058                 pathid = xptnextfreepathid();
4059         return (pathid);
4060 }
4061
4062 static const char *
4063 xpt_async_string(u_int32_t async_code)
4064 {
4065
4066         switch (async_code) {
4067         case AC_BUS_RESET: return ("AC_BUS_RESET");
4068         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4069         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4070         case AC_SENT_BDR: return ("AC_SENT_BDR");
4071         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4072         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4073         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4074         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4075         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4076         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4077         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4078         case AC_CONTRACT: return ("AC_CONTRACT");
4079         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4080         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4081         }
4082         return ("AC_UNKNOWN");
4083 }
4084
4085 void
4086 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4087 {
4088         struct cam_eb *bus;
4089         struct cam_et *target, *next_target;
4090         struct cam_ed *device, *next_device;
4091
4092         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4093         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4094             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4095
4096         /*
4097          * Most async events come from a CAM interrupt context.  In
4098          * a few cases, the error recovery code at the peripheral layer,
4099          * which may run from our SWI or a process context, may signal
4100          * deferred events with a call to xpt_async.
4101          */
4102
4103         bus = path->bus;
4104
4105         if (async_code == AC_BUS_RESET) {
4106                 /* Update our notion of when the last reset occurred */
4107                 microtime(&bus->last_reset);
4108         }
4109
4110         for (target = TAILQ_FIRST(&bus->et_entries);
4111              target != NULL;
4112              target = next_target) {
4113
4114                 next_target = TAILQ_NEXT(target, links);
4115
4116                 if (path->target != target
4117                  && path->target->target_id != CAM_TARGET_WILDCARD
4118                  && target->target_id != CAM_TARGET_WILDCARD)
4119                         continue;
4120
4121                 if (async_code == AC_SENT_BDR) {
4122                         /* Update our notion of when the last reset occurred */
4123                         microtime(&path->target->last_reset);
4124                 }
4125
4126                 for (device = TAILQ_FIRST(&target->ed_entries);
4127                      device != NULL;
4128                      device = next_device) {
4129
4130                         next_device = TAILQ_NEXT(device, links);
4131
4132                         if (path->device != device
4133                          && path->device->lun_id != CAM_LUN_WILDCARD
4134                          && device->lun_id != CAM_LUN_WILDCARD)
4135                                 continue;
4136                         /*
4137                          * The async callback could free the device.
4138                          * If it is a broadcast async, it doesn't hold
4139                          * device reference, so take our own reference.
4140                          */
4141                         xpt_acquire_device(device);
4142                         (*(bus->xport->async))(async_code, bus,
4143                                                target, device,
4144                                                async_arg);
4145
4146                         xpt_async_bcast(&device->asyncs, async_code,
4147                                         path, async_arg);
4148                         xpt_release_device(device);
4149                 }
4150         }
4151
4152         /*
4153          * If this wasn't a fully wildcarded async, tell all
4154          * clients that want all async events.
4155          */
4156         if (bus != xpt_periph->path->bus)
4157                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4158                                 path, async_arg);
4159 }
4160
4161 static void
4162 xpt_async_bcast(struct async_list *async_head,
4163                 u_int32_t async_code,
4164                 struct cam_path *path, void *async_arg)
4165 {
4166         struct async_node *cur_entry;
4167
4168         cur_entry = SLIST_FIRST(async_head);
4169         while (cur_entry != NULL) {
4170                 struct async_node *next_entry;
4171                 /*
4172                  * Grab the next list entry before we call the current
4173                  * entry's callback.  This is because the callback function
4174                  * can delete its async callback entry.
4175                  */
4176                 next_entry = SLIST_NEXT(cur_entry, links);
4177                 if ((cur_entry->event_enable & async_code) != 0)
4178                         cur_entry->callback(cur_entry->callback_arg,
4179                                             async_code, path,
4180                                             async_arg);
4181                 cur_entry = next_entry;
4182         }
4183 }
4184
4185 static void
4186 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4187                       struct cam_et *target, struct cam_ed *device,
4188                       void *async_arg)
4189 {
4190         printf("%s called\n", __func__);
4191 }
4192
4193 u_int32_t
4194 xpt_freeze_devq(struct cam_path *path, u_int count)
4195 {
4196         struct cam_ed *dev = path->device;
4197
4198         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4199         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq() %u->%u\n",
4200             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4201         dev->ccbq.queue.qfrozen_cnt += count;
4202         /* Remove frozen device from sendq. */
4203         if (device_is_queued(dev)) {
4204                 camq_remove(&dev->sim->devq->send_queue,
4205                     dev->devq_entry.pinfo.index);
4206         }
4207         return (dev->ccbq.queue.qfrozen_cnt);
4208 }
4209
4210 u_int32_t
4211 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4212 {
4213
4214         mtx_assert(sim->mtx, MA_OWNED);
4215         sim->devq->send_queue.qfrozen_cnt += count;
4216         return (sim->devq->send_queue.qfrozen_cnt);
4217 }
4218
4219 static void
4220 xpt_release_devq_timeout(void *arg)
4221 {
4222         struct cam_ed *device;
4223
4224         device = (struct cam_ed *)arg;
4225         CAM_DEBUG_DEV(device, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4226         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4227 }
4228
4229 void
4230 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4231 {
4232
4233         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4234         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4235             count, run_queue));
4236         xpt_release_devq_device(path->device, count, run_queue);
4237 }
4238
4239 void
4240 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4241 {
4242
4243         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4244             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4245             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4246         if (count > dev->ccbq.queue.qfrozen_cnt) {
4247 #ifdef INVARIANTS
4248                 printf("xpt_release_devq(): requested %u > present %u\n",
4249                     count, dev->ccbq.queue.qfrozen_cnt);
4250 #endif
4251                 count = dev->ccbq.queue.qfrozen_cnt;
4252         }
4253         dev->ccbq.queue.qfrozen_cnt -= count;
4254         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4255                 /*
4256                  * No longer need to wait for a successful
4257                  * command completion.
4258                  */
4259                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4260                 /*
4261                  * Remove any timeouts that might be scheduled
4262                  * to release this queue.
4263                  */
4264                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4265                         callout_stop(&dev->callout);
4266                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4267                 }
4268                 xpt_run_dev_allocq(dev);
4269                 if (run_queue == 0)
4270                         return;
4271                 /*
4272                  * Now that we are unfrozen schedule the
4273                  * device so any pending transactions are
4274                  * run.
4275                  */
4276                 if (xpt_schedule_devq(dev->sim->devq, dev))
4277                         xpt_run_devq(dev->sim->devq);
4278         }
4279 }
4280
4281 void
4282 xpt_release_simq(struct cam_sim *sim, int run_queue)
4283 {
4284         struct  camq *sendq;
4285
4286         mtx_assert(sim->mtx, MA_OWNED);
4287         sendq = &(sim->devq->send_queue);
4288         if (sendq->qfrozen_cnt <= 0) {
4289 #ifdef INVARIANTS
4290                 printf("xpt_release_simq: requested 1 > present %u\n",
4291                     sendq->qfrozen_cnt);
4292 #endif
4293         } else
4294                 sendq->qfrozen_cnt--;
4295         if (sendq->qfrozen_cnt == 0) {
4296                 /*
4297                  * If there is a timeout scheduled to release this
4298                  * sim queue, remove it.  The queue frozen count is
4299                  * already at 0.
4300                  */
4301                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4302                         callout_stop(&sim->callout);
4303                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4304                 }
4305                 if (run_queue) {
4306                         /*
4307                          * Now that we are unfrozen run the send queue.
4308                          */
4309                         xpt_run_devq(sim->devq);
4310                 }
4311         }
4312 }
4313
4314 /*
4315  * XXX Appears to be unused.
4316  */
4317 static void
4318 xpt_release_simq_timeout(void *arg)
4319 {
4320         struct cam_sim *sim;
4321
4322         sim = (struct cam_sim *)arg;
4323         xpt_release_simq(sim, /* run_queue */ TRUE);
4324 }
4325
4326 void
4327 xpt_done(union ccb *done_ccb)
4328 {
4329         struct cam_sim *sim;
4330         int     first;
4331
4332         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4333         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4334                 /*
4335                  * Queue up the request for handling by our SWI handler
4336                  * any of the "non-immediate" type of ccbs.
4337                  */
4338                 sim = done_ccb->ccb_h.path->bus->sim;
4339                 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h,
4340                     sim_links.tqe);
4341                 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4342                 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED |
4343                     CAM_SIM_BATCH)) == 0) {
4344                         mtx_lock(&cam_simq_lock);
4345                         first = TAILQ_EMPTY(&cam_simq);
4346                         TAILQ_INSERT_TAIL(&cam_simq, sim, links);
4347                         mtx_unlock(&cam_simq_lock);
4348                         sim->flags |= CAM_SIM_ON_DONEQ;
4349                         if (first)
4350                                 swi_sched(cambio_ih, 0);
4351                 }
4352         }
4353 }
4354
4355 void
4356 xpt_batch_start(struct cam_sim *sim)
4357 {
4358
4359         KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set"));
4360         sim->flags |= CAM_SIM_BATCH;
4361 }
4362
4363 void
4364 xpt_batch_done(struct cam_sim *sim)
4365 {
4366
4367         KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set"));
4368         sim->flags &= ~CAM_SIM_BATCH;
4369         if (!TAILQ_EMPTY(&sim->sim_doneq) &&
4370             (sim->flags & CAM_SIM_ON_DONEQ) == 0)
4371                 camisr_runqueue(sim);
4372 }
4373
4374 union ccb *
4375 xpt_alloc_ccb()
4376 {
4377         union ccb *new_ccb;
4378
4379         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4380         return (new_ccb);
4381 }
4382
4383 union ccb *
4384 xpt_alloc_ccb_nowait()
4385 {
4386         union ccb *new_ccb;
4387
4388         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4389         return (new_ccb);
4390 }
4391
4392 void
4393 xpt_free_ccb(union ccb *free_ccb)
4394 {
4395         free(free_ccb, M_CAMCCB);
4396 }
4397
4398
4399
4400 /* Private XPT functions */
4401
4402 /*
4403  * Get a CAM control block for the caller. Charge the structure to the device
4404  * referenced by the path.  If the this device has no 'credits' then the
4405  * device already has the maximum number of outstanding operations under way
4406  * and we return NULL. If we don't have sufficient resources to allocate more
4407  * ccbs, we also return NULL.
4408  */
4409 static union ccb *
4410 xpt_get_ccb(struct cam_ed *device)
4411 {
4412         union ccb *new_ccb;
4413         struct cam_sim *sim;
4414
4415         sim = device->sim;
4416         if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) {
4417                 new_ccb = xpt_alloc_ccb_nowait();
4418                 if (new_ccb == NULL) {
4419                         return (NULL);
4420                 }
4421                 if ((sim->flags & CAM_SIM_MPSAFE) == 0)
4422                         callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4423                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h,
4424                                   xpt_links.sle);
4425                 sim->ccb_count++;
4426         }
4427         cam_ccbq_take_opening(&device->ccbq);
4428         SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle);
4429         return (new_ccb);
4430 }
4431
4432 static void
4433 xpt_release_bus(struct cam_eb *bus)
4434 {
4435
4436         xpt_lock_buses();
4437         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4438         if (--bus->refcount > 0) {
4439                 xpt_unlock_buses();
4440                 return;
4441         }
4442         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4443             ("refcount is zero, but target list is not empty"));
4444         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4445         xsoftc.bus_generation++;
4446         xpt_unlock_buses();
4447         cam_sim_release(bus->sim);
4448         free(bus, M_CAMXPT);
4449 }
4450
4451 static struct cam_et *
4452 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4453 {
4454         struct cam_et *cur_target, *target;
4455
4456         mtx_assert(bus->sim->mtx, MA_OWNED);
4457         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4458                                          M_NOWAIT|M_ZERO);
4459         if (target == NULL)
4460                 return (NULL);
4461
4462         TAILQ_INIT(&target->ed_entries);
4463         target->bus = bus;
4464         target->target_id = target_id;
4465         target->refcount = 1;
4466         target->generation = 0;
4467         target->luns = NULL;
4468         timevalclear(&target->last_reset);
4469         /*
4470          * Hold a reference to our parent bus so it
4471          * will not go away before we do.
4472          */
4473         xpt_lock_buses();
4474         bus->refcount++;
4475         xpt_unlock_buses();
4476
4477         /* Insertion sort into our bus's target list */
4478         cur_target = TAILQ_FIRST(&bus->et_entries);
4479         while (cur_target != NULL && cur_target->target_id < target_id)
4480                 cur_target = TAILQ_NEXT(cur_target, links);
4481         if (cur_target != NULL) {
4482                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4483         } else {
4484                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4485         }
4486         bus->generation++;
4487         return (target);
4488 }
4489
4490 static void
4491 xpt_release_target(struct cam_et *target)
4492 {
4493
4494         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4495         if (--target->refcount > 0)
4496                 return;
4497         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4498             ("refcount is zero, but device list is not empty"));
4499         TAILQ_REMOVE(&target->bus->et_entries, target, links);
4500         target->bus->generation++;
4501         xpt_release_bus(target->bus);
4502         if (target->luns)
4503                 free(target->luns, M_CAMXPT);
4504         free(target, M_CAMXPT);
4505 }
4506
4507 static struct cam_ed *
4508 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4509                          lun_id_t lun_id)
4510 {
4511         struct cam_ed *device;
4512
4513         device = xpt_alloc_device(bus, target, lun_id);
4514         if (device == NULL)
4515                 return (NULL);
4516
4517         device->mintags = 1;
4518         device->maxtags = 1;
4519         bus->sim->max_ccbs += device->ccbq.devq_openings;
4520         return (device);
4521 }
4522
4523 struct cam_ed *
4524 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4525 {
4526         struct cam_ed   *cur_device, *device;
4527         struct cam_devq *devq;
4528         cam_status status;
4529
4530         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4531         /* Make space for us in the device queue on our bus */
4532         devq = bus->sim->devq;
4533         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4534         if (status != CAM_REQ_CMP)
4535                 return (NULL);
4536
4537         device = (struct cam_ed *)malloc(sizeof(*device),
4538                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4539         if (device == NULL)
4540                 return (NULL);
4541
4542         cam_init_pinfo(&device->devq_entry.pinfo);
4543         device->devq_entry.device = device;
4544         device->target = target;
4545         device->lun_id = lun_id;
4546         device->sim = bus->sim;
4547         /* Initialize our queues */
4548         if (camq_init(&device->drvq, 0) != 0) {
4549                 free(device, M_CAMDEV);
4550                 return (NULL);
4551         }
4552         if (cam_ccbq_init(&device->ccbq,
4553                           bus->sim->max_dev_openings) != 0) {
4554                 camq_fini(&device->drvq);
4555                 free(device, M_CAMDEV);
4556                 return (NULL);
4557         }
4558         SLIST_INIT(&device->asyncs);
4559         SLIST_INIT(&device->periphs);
4560         device->generation = 0;
4561         device->owner = NULL;
4562         device->flags = CAM_DEV_UNCONFIGURED;
4563         device->tag_delay_count = 0;
4564         device->tag_saved_openings = 0;
4565         device->refcount = 1;
4566         callout_init_mtx(&device->callout, bus->sim->mtx, 0);
4567
4568         cur_device = TAILQ_FIRST(&target->ed_entries);
4569         while (cur_device != NULL && cur_device->lun_id < lun_id)
4570                 cur_device = TAILQ_NEXT(cur_device, links);
4571         if (cur_device != NULL)
4572                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4573         else
4574                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4575         target->refcount++;
4576         target->generation++;
4577         return (device);
4578 }
4579
4580 void
4581 xpt_acquire_device(struct cam_ed *device)
4582 {
4583
4584         mtx_assert(device->sim->mtx, MA_OWNED);
4585         device->refcount++;
4586 }
4587
4588 void
4589 xpt_release_device(struct cam_ed *device)
4590 {
4591         struct cam_devq *devq;
4592
4593         mtx_assert(device->sim->mtx, MA_OWNED);
4594         if (--device->refcount > 0)
4595                 return;
4596
4597         KASSERT(SLIST_EMPTY(&device->periphs),
4598             ("refcount is zero, but periphs list is not empty"));
4599         if (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4600                 panic("Removing device while still queued for ccbs");
4601
4602         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4603                 callout_stop(&device->callout);
4604
4605         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4606         device->target->generation++;
4607         device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings;
4608         /* Release our slot in the devq */
4609         devq = device->target->bus->sim->devq;
4610         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4611         camq_fini(&device->drvq);
4612         cam_ccbq_fini(&device->ccbq);
4613         /*
4614          * Free allocated memory.  free(9) does nothing if the
4615          * supplied pointer is NULL, so it is safe to call without
4616          * checking.
4617          */
4618         free(device->supported_vpds, M_CAMXPT);
4619         free(device->device_id, M_CAMXPT);
4620         free(device->physpath, M_CAMXPT);
4621         free(device->rcap_buf, M_CAMXPT);
4622         free(device->serial_num, M_CAMXPT);
4623
4624         xpt_release_target(device->target);
4625         free(device, M_CAMDEV);
4626 }
4627
4628 u_int32_t
4629 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4630 {
4631         int     diff;
4632         int     result;
4633         struct  cam_ed *dev;
4634
4635         dev = path->device;
4636
4637         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4638         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4639         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4640          || (dev->inq_flags & SID_CmdQue) != 0)
4641                 dev->tag_saved_openings = newopenings;
4642         /* Adjust the global limit */
4643         dev->sim->max_ccbs += diff;
4644         return (result);
4645 }
4646
4647 static struct cam_eb *
4648 xpt_find_bus(path_id_t path_id)
4649 {
4650         struct cam_eb *bus;
4651
4652         xpt_lock_buses();
4653         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4654              bus != NULL;
4655              bus = TAILQ_NEXT(bus, links)) {
4656                 if (bus->path_id == path_id) {
4657                         bus->refcount++;
4658                         break;
4659                 }
4660         }
4661         xpt_unlock_buses();
4662         return (bus);
4663 }
4664
4665 static struct cam_et *
4666 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4667 {
4668         struct cam_et *target;
4669
4670         mtx_assert(bus->sim->mtx, MA_OWNED);
4671         for (target = TAILQ_FIRST(&bus->et_entries);
4672              target != NULL;
4673              target = TAILQ_NEXT(target, links)) {
4674                 if (target->target_id == target_id) {
4675                         target->refcount++;
4676                         break;
4677                 }
4678         }
4679         return (target);
4680 }
4681
4682 static struct cam_ed *
4683 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4684 {
4685         struct cam_ed *device;
4686
4687         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4688         for (device = TAILQ_FIRST(&target->ed_entries);
4689              device != NULL;
4690              device = TAILQ_NEXT(device, links)) {
4691                 if (device->lun_id == lun_id) {
4692                         device->refcount++;
4693                         break;
4694                 }
4695         }
4696         return (device);
4697 }
4698
4699 void
4700 xpt_start_tags(struct cam_path *path)
4701 {
4702         struct ccb_relsim crs;
4703         struct cam_ed *device;
4704         struct cam_sim *sim;
4705         int    newopenings;
4706
4707         device = path->device;
4708         sim = path->bus->sim;
4709         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4710         xpt_freeze_devq(path, /*count*/1);
4711         device->inq_flags |= SID_CmdQue;
4712         if (device->tag_saved_openings != 0)
4713                 newopenings = device->tag_saved_openings;
4714         else
4715                 newopenings = min(device->maxtags,
4716                                   sim->max_tagged_dev_openings);
4717         xpt_dev_ccbq_resize(path, newopenings);
4718         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4719         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4720         crs.ccb_h.func_code = XPT_REL_SIMQ;
4721         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4722         crs.openings
4723             = crs.release_timeout
4724             = crs.qfrozen_cnt
4725             = 0;
4726         xpt_action((union ccb *)&crs);
4727 }
4728
4729 void
4730 xpt_stop_tags(struct cam_path *path)
4731 {
4732         struct ccb_relsim crs;
4733         struct cam_ed *device;
4734         struct cam_sim *sim;
4735
4736         device = path->device;
4737         sim = path->bus->sim;
4738         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4739         device->tag_delay_count = 0;
4740         xpt_freeze_devq(path, /*count*/1);
4741         device->inq_flags &= ~SID_CmdQue;
4742         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4743         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4744         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4745         crs.ccb_h.func_code = XPT_REL_SIMQ;
4746         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4747         crs.openings
4748             = crs.release_timeout
4749             = crs.qfrozen_cnt
4750             = 0;
4751         xpt_action((union ccb *)&crs);
4752 }
4753
4754 static void
4755 xpt_boot_delay(void *arg)
4756 {
4757
4758         xpt_release_boot();
4759 }
4760
4761 static void
4762 xpt_config(void *arg)
4763 {
4764         /*
4765          * Now that interrupts are enabled, go find our devices
4766          */
4767
4768         /* Setup debugging path */
4769         if (cam_dflags != CAM_DEBUG_NONE) {
4770                 if (xpt_create_path_unlocked(&cam_dpath, NULL,
4771                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4772                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4773                         printf("xpt_config: xpt_create_path() failed for debug"
4774                                " target %d:%d:%d, debugging disabled\n",
4775                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4776                         cam_dflags = CAM_DEBUG_NONE;
4777                 }
4778         } else
4779                 cam_dpath = NULL;
4780
4781         periphdriver_init(1);
4782         xpt_hold_boot();
4783         callout_init(&xsoftc.boot_callout, 1);
4784         callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000,
4785             xpt_boot_delay, NULL);
4786         /* Fire up rescan thread. */
4787         if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) {
4788                 printf("xpt_config: failed to create rescan thread.\n");
4789         }
4790 }
4791
4792 void
4793 xpt_hold_boot(void)
4794 {
4795         xpt_lock_buses();
4796         xsoftc.buses_to_config++;
4797         xpt_unlock_buses();
4798 }
4799
4800 void
4801 xpt_release_boot(void)
4802 {
4803         xpt_lock_buses();
4804         xsoftc.buses_to_config--;
4805         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4806                 struct  xpt_task *task;
4807
4808                 xsoftc.buses_config_done = 1;
4809                 xpt_unlock_buses();
4810                 /* Call manually because we don't have any busses */
4811                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4812                 if (task != NULL) {
4813                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4814                         taskqueue_enqueue(taskqueue_thread, &task->task);
4815                 }
4816         } else
4817                 xpt_unlock_buses();
4818 }
4819
4820 /*
4821  * If the given device only has one peripheral attached to it, and if that
4822  * peripheral is the passthrough driver, announce it.  This insures that the
4823  * user sees some sort of announcement for every peripheral in their system.
4824  */
4825 static int
4826 xptpassannouncefunc(struct cam_ed *device, void *arg)
4827 {
4828         struct cam_periph *periph;
4829         int i;
4830
4831         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
4832              periph = SLIST_NEXT(periph, periph_links), i++);
4833
4834         periph = SLIST_FIRST(&device->periphs);
4835         if ((i == 1)
4836          && (strncmp(periph->periph_name, "pass", 4) == 0))
4837                 xpt_announce_periph(periph, NULL);
4838
4839         return(1);
4840 }
4841
4842 static void
4843 xpt_finishconfig_task(void *context, int pending)
4844 {
4845
4846         periphdriver_init(2);
4847         /*
4848          * Check for devices with no "standard" peripheral driver
4849          * attached.  For any devices like that, announce the
4850          * passthrough driver so the user will see something.
4851          */
4852         if (!bootverbose)
4853                 xpt_for_all_devices(xptpassannouncefunc, NULL);
4854
4855         /* Release our hook so that the boot can continue. */
4856         config_intrhook_disestablish(xsoftc.xpt_config_hook);
4857         free(xsoftc.xpt_config_hook, M_CAMXPT);
4858         xsoftc.xpt_config_hook = NULL;
4859
4860         free(context, M_CAMXPT);
4861 }
4862
4863 cam_status
4864 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
4865                    struct cam_path *path)
4866 {
4867         struct ccb_setasync csa;
4868         cam_status status;
4869         int xptpath = 0;
4870
4871         if (path == NULL) {
4872                 mtx_lock(&xsoftc.xpt_lock);
4873                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
4874                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4875                 if (status != CAM_REQ_CMP) {
4876                         mtx_unlock(&xsoftc.xpt_lock);
4877                         return (status);
4878                 }
4879                 xptpath = 1;
4880         }
4881
4882         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
4883         csa.ccb_h.func_code = XPT_SASYNC_CB;
4884         csa.event_enable = event;
4885         csa.callback = cbfunc;
4886         csa.callback_arg = cbarg;
4887         xpt_action((union ccb *)&csa);
4888         status = csa.ccb_h.status;
4889
4890         if (xptpath) {
4891                 xpt_free_path(path);
4892                 mtx_unlock(&xsoftc.xpt_lock);
4893         }
4894
4895         if ((status == CAM_REQ_CMP) &&
4896             (csa.event_enable & AC_FOUND_DEVICE)) {
4897                 /*
4898                  * Get this peripheral up to date with all
4899                  * the currently existing devices.
4900                  */
4901                 xpt_for_all_devices(xptsetasyncfunc, &csa);
4902         }
4903         if ((status == CAM_REQ_CMP) &&
4904             (csa.event_enable & AC_PATH_REGISTERED)) {
4905                 /*
4906                  * Get this peripheral up to date with all
4907                  * the currently existing busses.
4908                  */
4909                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
4910         }
4911
4912         return (status);
4913 }
4914
4915 static void
4916 xptaction(struct cam_sim *sim, union ccb *work_ccb)
4917 {
4918         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
4919
4920         switch (work_ccb->ccb_h.func_code) {
4921         /* Common cases first */
4922         case XPT_PATH_INQ:              /* Path routing inquiry */
4923         {
4924                 struct ccb_pathinq *cpi;
4925
4926                 cpi = &work_ccb->cpi;
4927                 cpi->version_num = 1; /* XXX??? */
4928                 cpi->hba_inquiry = 0;
4929                 cpi->target_sprt = 0;
4930                 cpi->hba_misc = 0;
4931                 cpi->hba_eng_cnt = 0;
4932                 cpi->max_target = 0;
4933                 cpi->max_lun = 0;
4934                 cpi->initiator_id = 0;
4935                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
4936                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
4937                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
4938                 cpi->unit_number = sim->unit_number;
4939                 cpi->bus_id = sim->bus_id;
4940                 cpi->base_transfer_speed = 0;
4941                 cpi->protocol = PROTO_UNSPECIFIED;
4942                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
4943                 cpi->transport = XPORT_UNSPECIFIED;
4944                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
4945                 cpi->ccb_h.status = CAM_REQ_CMP;
4946                 xpt_done(work_ccb);
4947                 break;
4948         }
4949         default:
4950                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
4951                 xpt_done(work_ccb);
4952                 break;
4953         }
4954 }
4955
4956 /*
4957  * The xpt as a "controller" has no interrupt sources, so polling
4958  * is a no-op.
4959  */
4960 static void
4961 xptpoll(struct cam_sim *sim)
4962 {
4963 }
4964
4965 void
4966 xpt_lock_buses(void)
4967 {
4968         mtx_lock(&xsoftc.xpt_topo_lock);
4969 }
4970
4971 void
4972 xpt_unlock_buses(void)
4973 {
4974         mtx_unlock(&xsoftc.xpt_topo_lock);
4975 }
4976
4977 static void
4978 camisr(void *dummy)
4979 {
4980         cam_simq_t queue;
4981         struct cam_sim *sim;
4982
4983         mtx_lock(&cam_simq_lock);
4984         TAILQ_INIT(&queue);
4985         while (!TAILQ_EMPTY(&cam_simq)) {
4986                 TAILQ_CONCAT(&queue, &cam_simq, links);
4987                 mtx_unlock(&cam_simq_lock);
4988
4989                 while ((sim = TAILQ_FIRST(&queue)) != NULL) {
4990                         TAILQ_REMOVE(&queue, sim, links);
4991                         CAM_SIM_LOCK(sim);
4992                         camisr_runqueue(sim);
4993                         sim->flags &= ~CAM_SIM_ON_DONEQ;
4994                         CAM_SIM_UNLOCK(sim);
4995                 }
4996                 mtx_lock(&cam_simq_lock);
4997         }
4998         mtx_unlock(&cam_simq_lock);
4999 }
5000
5001 static void
5002 camisr_runqueue(struct cam_sim *sim)
5003 {
5004         struct  ccb_hdr *ccb_h;
5005
5006         while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) {
5007                 int     runq;
5008
5009                 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe);
5010                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5011
5012                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
5013                           ("camisr\n"));
5014
5015                 runq = FALSE;
5016
5017                 if (ccb_h->flags & CAM_HIGH_POWER) {
5018                         struct highpowerlist    *hphead;
5019                         struct cam_ed           *device;
5020
5021                         mtx_lock(&xsoftc.xpt_lock);
5022                         hphead = &xsoftc.highpowerq;
5023
5024                         device = STAILQ_FIRST(hphead);
5025
5026                         /*
5027                          * Increment the count since this command is done.
5028                          */
5029                         xsoftc.num_highpower++;
5030
5031                         /*
5032                          * Any high powered commands queued up?
5033                          */
5034                         if (device != NULL) {
5035
5036                                 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5037                                 mtx_unlock(&xsoftc.xpt_lock);
5038
5039                                 xpt_release_devq_device(device,
5040                                                  /*count*/1, /*runqueue*/TRUE);
5041                         } else
5042                                 mtx_unlock(&xsoftc.xpt_lock);
5043                 }
5044
5045                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5046                         struct cam_ed *dev;
5047
5048                         dev = ccb_h->path->device;
5049
5050                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5051                         sim->devq->send_active--;
5052                         sim->devq->send_openings++;
5053                         runq = TRUE;
5054
5055                         if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5056                           && (dev->ccbq.dev_active == 0))) {
5057                                 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5058                                 xpt_release_devq(ccb_h->path, /*count*/1,
5059                                                  /*run_queue*/FALSE);
5060                         }
5061
5062                         if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5063                           && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5064                                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5065                                 xpt_release_devq(ccb_h->path, /*count*/1,
5066                                                  /*run_queue*/FALSE);
5067                         }
5068
5069                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5070                          && (--dev->tag_delay_count == 0))
5071                                 xpt_start_tags(ccb_h->path);
5072                         if (!device_is_queued(dev)) {
5073                                 (void)xpt_schedule_devq(sim->devq, dev);
5074                         }
5075                 }
5076
5077                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5078                         xpt_release_simq(sim, /*run_queue*/TRUE);
5079                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
5080                         runq = FALSE;
5081                 }
5082
5083                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5084                  && (ccb_h->status & CAM_DEV_QFRZN)) {
5085                         xpt_release_devq(ccb_h->path, /*count*/1,
5086                                          /*run_queue*/TRUE);
5087                         ccb_h->status &= ~CAM_DEV_QFRZN;
5088                 } else if (runq) {
5089                         xpt_run_devq(sim->devq);
5090                 }
5091
5092                 /* Call the peripheral driver's callback */
5093                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5094         }
5095 }