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/proc.h>
  44 #include <sys/sbuf.h>
  45 #include <sys/smp.h>
  46 #include <sys/taskqueue.h>
  47
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/kthread.h>
  52
  53 #include <cam/cam.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/cam_periph.h>
  56 #include <cam/cam_queue.h>
  57 #include <cam/cam_sim.h>
  58 #include <cam/cam_xpt.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt_periph.h>
  61 #include <cam/cam_xpt_internal.h>
  62 #include <cam/cam_debug.h>
  63 #include <cam/cam_compat.h>
  64
  65 #include <cam/scsi/scsi_all.h>
  66 #include <cam/scsi/scsi_message.h>
  67 #include <cam/scsi/scsi_pass.h>
  68
  69 #include <machine/md_var.h>     /* geometry translation */
  70 #include <machine/stdarg.h>     /* for xpt_print below */
  71
  72 #include "opt_cam.h"
  73
  74 /*
  75  * This is the maximum number of high powered commands (e.g. start unit)
  76  * that can be outstanding at a particular time.
  77  */
  78 #ifndef CAM_MAX_HIGHPOWER
  79 #define CAM_MAX_HIGHPOWER  4
  80 #endif
  81
  82 /* Datastructures internal to the xpt layer */
  83 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  84 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  85 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  86 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  87
  88 /* Object for defering XPT actions to a taskqueue */
  89 struct xpt_task {
  90         struct task     task;
  91         void            *data1;
  92         uintptr_t       data2;
  93 };
  94
  95 struct xpt_softc {
  96         /* number of high powered commands that can go through right now */
  97         struct mtx              xpt_highpower_lock;
  98         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
  99         int                     num_highpower;
 100
 101         /* queue for handling async rescan requests. */
 102         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 103         int buses_to_config;
 104         int buses_config_done;
 105
 106         /* Registered busses */
 107         TAILQ_HEAD(,cam_eb)     xpt_busses;
 108         u_int                   bus_generation;
 109
 110         struct intr_config_hook *xpt_config_hook;
 111
 112         int                     boot_delay;
 113         struct callout          boot_callout;
 114
 115         struct mtx              xpt_topo_lock;
 116         struct mtx              xpt_lock;
 117         struct taskqueue        *xpt_taskq;
 118 };
 119
 120 typedef enum {
 121         DM_RET_COPY             = 0x01,
 122         DM_RET_FLAG_MASK        = 0x0f,
 123         DM_RET_NONE             = 0x00,
 124         DM_RET_STOP             = 0x10,
 125         DM_RET_DESCEND          = 0x20,
 126         DM_RET_ERROR            = 0x30,
 127         DM_RET_ACTION_MASK      = 0xf0
 128 } dev_match_ret;
 129
 130 typedef enum {
 131         XPT_DEPTH_BUS,
 132         XPT_DEPTH_TARGET,
 133         XPT_DEPTH_DEVICE,
 134         XPT_DEPTH_PERIPH
 135 } xpt_traverse_depth;
 136
 137 struct xpt_traverse_config {
 138         xpt_traverse_depth      depth;
 139         void                    *tr_func;
 140         void                    *tr_arg;
 141 };
 142
 143 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 144 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 145 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 146 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 147 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 148
 149 /* Transport layer configuration information */
 150 static struct xpt_softc xsoftc;
 151
 152 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 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 struct cam_doneq {
 159         struct mtx_padalign     cam_doneq_mtx;
 160         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 161         int                     cam_doneq_sleep;
 162 };
 163
 164 static struct cam_doneq cam_doneqs[MAXCPU];
 165 static int cam_num_doneqs;
 166 static struct proc *cam_proc;
 167
 168 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
 169 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 170            &cam_num_doneqs, 0, "Number of completion queues/threads");
 171
 172 struct cam_periph *xpt_periph;
 173
 174 static periph_init_t xpt_periph_init;
 175
 176 static struct periph_driver xpt_driver =
 177 {
 178         xpt_periph_init, "xpt",
 179         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 180         CAM_PERIPH_DRV_EARLY
 181 };
 182
 183 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 184
 185 static d_open_t xptopen;
 186 static d_close_t xptclose;
 187 static d_ioctl_t xptioctl;
 188 static d_ioctl_t xptdoioctl;
 189
 190 static struct cdevsw xpt_cdevsw = {
 191         .d_version =    D_VERSION,
 192         .d_flags =      0,
 193         .d_open =       xptopen,
 194         .d_close =      xptclose,
 195         .d_ioctl =      xptioctl,
 196         .d_name =       "xpt",
 197 };
 198
 199 /* Storage for debugging datastructures */
 200 struct cam_path *cam_dpath;
 201 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 202 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
 203 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
 204         &cam_dflags, 0, "Enabled debug flags");
 205 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 206 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
 207 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
 208         &cam_debug_delay, 0, "Delay in us after each debug message");
 209
 210 /* Our boot-time initialization hook */
 211 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 212
 213 static moduledata_t cam_moduledata = {
 214         "cam",
 215         cam_module_event_handler,
 216         NULL
 217 };
 218
 219 static int      xpt_init(void *);
 220
 221 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 222 MODULE_VERSION(cam, 1);
 223
 224
 225 static void             xpt_async_bcast(struct async_list *async_head,
 226                                         u_int32_t async_code,
 227                                         struct cam_path *path,
 228                                         void *async_arg);
 229 static path_id_t xptnextfreepathid(void);
 230 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 231 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 232 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 233 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 234 static void      xpt_run_allocq_task(void *context, int pending);
 235 static void      xpt_run_devq(struct cam_devq *devq);
 236 static timeout_t xpt_release_devq_timeout;
 237 static void      xpt_release_simq_timeout(void *arg) __unused;
 238 static void      xpt_acquire_bus(struct cam_eb *bus);
 239 static void      xpt_release_bus(struct cam_eb *bus);
 240 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 241 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 242                     int run_queue);
 243 static struct cam_et*
 244                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 245 static void      xpt_acquire_target(struct cam_et *target);
 246 static void      xpt_release_target(struct cam_et *target);
 247 static struct cam_eb*
 248                  xpt_find_bus(path_id_t path_id);
 249 static struct cam_et*
 250                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 251 static struct cam_ed*
 252                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 253 static void      xpt_config(void *arg);
 254 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 255                                  u_int32_t new_priority);
 256 static xpt_devicefunc_t xptpassannouncefunc;
 257 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 258 static void      xptpoll(struct cam_sim *sim);
 259 static void      camisr_runqueue(void);
 260 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 261 static void      xpt_done_td(void *);
 262 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 263                                     u_int num_patterns, struct cam_eb *bus);
 264 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 265                                        u_int num_patterns,
 266                                        struct cam_ed *device);
 267 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 268                                        u_int num_patterns,
 269                                        struct cam_periph *periph);
 270 static xpt_busfunc_t    xptedtbusfunc;
 271 static xpt_targetfunc_t xptedttargetfunc;
 272 static xpt_devicefunc_t xptedtdevicefunc;
 273 static xpt_periphfunc_t xptedtperiphfunc;
 274 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 275 static xpt_periphfunc_t xptplistperiphfunc;
 276 static int              xptedtmatch(struct ccb_dev_match *cdm);
 277 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 278 static int              xptbustraverse(struct cam_eb *start_bus,
 279                                        xpt_busfunc_t *tr_func, void *arg);
 280 static int              xpttargettraverse(struct cam_eb *bus,
 281                                           struct cam_et *start_target,
 282                                           xpt_targetfunc_t *tr_func, void *arg);
 283 static int              xptdevicetraverse(struct cam_et *target,
 284                                           struct cam_ed *start_device,
 285                                           xpt_devicefunc_t *tr_func, void *arg);
 286 static int              xptperiphtraverse(struct cam_ed *device,
 287                                           struct cam_periph *start_periph,
 288                                           xpt_periphfunc_t *tr_func, void *arg);
 289 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 290                                         xpt_pdrvfunc_t *tr_func, void *arg);
 291 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 292                                             struct cam_periph *start_periph,
 293                                             xpt_periphfunc_t *tr_func,
 294                                             void *arg);
 295 static xpt_busfunc_t    xptdefbusfunc;
 296 static xpt_targetfunc_t xptdeftargetfunc;
 297 static xpt_devicefunc_t xptdefdevicefunc;
 298 static xpt_periphfunc_t xptdefperiphfunc;
 299 static void             xpt_finishconfig_task(void *context, int pending);
 300 static void             xpt_dev_async_default(u_int32_t async_code,
 301                                               struct cam_eb *bus,
 302                                               struct cam_et *target,
 303                                               struct cam_ed *device,
 304                                               void *async_arg);
 305 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 306                                                  struct cam_et *target,
 307                                                  lun_id_t lun_id);
 308 static xpt_devicefunc_t xptsetasyncfunc;
 309 static xpt_busfunc_t    xptsetasyncbusfunc;
 310 static cam_status       xptregister(struct cam_periph *periph,
 311                                     void *arg);
 312 static __inline int device_is_queued(struct cam_ed *device);
 313
 314 static __inline int
 315 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 316 {
 317         int     retval;
 318
 319         mtx_assert(&devq->send_mtx, MA_OWNED);
 320         if ((dev->ccbq.queue.entries > 0) &&
 321             (dev->ccbq.dev_openings > 0) &&
 322             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 323                 /*
 324                  * The priority of a device waiting for controller
 325                  * resources is that of the highest priority CCB
 326                  * enqueued.
 327                  */
 328                 retval =
 329                     xpt_schedule_dev(&devq->send_queue,
 330                                      &dev->devq_entry,
 331                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 332         } else {
 333                 retval = 0;
 334         }
 335         return (retval);
 336 }
 337
 338 static __inline int
 339 device_is_queued(struct cam_ed *device)
 340 {
 341         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 342 }
 343
 344 static void
 345 xpt_periph_init()
 346 {
 347         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 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         return(0);
 369 }
 370
 371 static int
 372 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 373 {
 374
 375         return(0);
 376 }
 377
 378 /*
 379  * Don't automatically grab the xpt softc lock here even though this is going
 380  * through the xpt device.  The xpt device is really just a back door for
 381  * accessing other devices and SIMs, so the right thing to do is to grab
 382  * the appropriate SIM lock once the bus/SIM is located.
 383  */
 384 static int
 385 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 386 {
 387         int error;
 388
 389         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 390                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 391         }
 392         return (error);
 393 }
 394
 395 static int
 396 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 397 {
 398         int error;
 399
 400         error = 0;
 401
 402         switch(cmd) {
 403         /*
 404          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 405          * to accept CCB types that don't quite make sense to send through a
 406          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 407          * in the CAM spec.
 408          */
 409         case CAMIOCOMMAND: {
 410                 union ccb *ccb;
 411                 union ccb *inccb;
 412                 struct cam_eb *bus;
 413
 414                 inccb = (union ccb *)addr;
 415
 416                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 417                 if (bus == NULL)
 418                         return (EINVAL);
 419
 420                 switch (inccb->ccb_h.func_code) {
 421                 case XPT_SCAN_BUS:
 422                 case XPT_RESET_BUS:
 423                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 424                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 425                                 xpt_release_bus(bus);
 426                                 return (EINVAL);
 427                         }
 428                         break;
 429                 case XPT_SCAN_TGT:
 430                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 431                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 432                                 xpt_release_bus(bus);
 433                                 return (EINVAL);
 434                         }
 435                         break;
 436                 default:
 437                         break;
 438                 }
 439
 440                 switch(inccb->ccb_h.func_code) {
 441                 case XPT_SCAN_BUS:
 442                 case XPT_RESET_BUS:
 443                 case XPT_PATH_INQ:
 444                 case XPT_ENG_INQ:
 445                 case XPT_SCAN_LUN:
 446                 case XPT_SCAN_TGT:
 447
 448                         ccb = xpt_alloc_ccb();
 449
 450                         /*
 451                          * Create a path using the bus, target, and lun the
 452                          * user passed in.
 453                          */
 454                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 455                                             inccb->ccb_h.path_id,
 456                                             inccb->ccb_h.target_id,
 457                                             inccb->ccb_h.target_lun) !=
 458                                             CAM_REQ_CMP){
 459                                 error = EINVAL;
 460                                 xpt_free_ccb(ccb);
 461                                 break;
 462                         }
 463                         /* Ensure all of our fields are correct */
 464                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 465                                       inccb->ccb_h.pinfo.priority);
 466                         xpt_merge_ccb(ccb, inccb);
 467                         xpt_path_lock(ccb->ccb_h.path);
 468                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 469                         xpt_path_unlock(ccb->ccb_h.path);
 470                         bcopy(ccb, inccb, sizeof(union ccb));
 471                         xpt_free_path(ccb->ccb_h.path);
 472                         xpt_free_ccb(ccb);
 473                         break;
 474
 475                 case XPT_DEBUG: {
 476                         union ccb ccb;
 477
 478                         /*
 479                          * This is an immediate CCB, so it's okay to
 480                          * allocate it on the stack.
 481                          */
 482
 483                         /*
 484                          * Create a path using the bus, target, and lun the
 485                          * user passed in.
 486                          */
 487                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 488                                             inccb->ccb_h.path_id,
 489                                             inccb->ccb_h.target_id,
 490                                             inccb->ccb_h.target_lun) !=
 491                                             CAM_REQ_CMP){
 492                                 error = EINVAL;
 493                                 break;
 494                         }
 495                         /* Ensure all of our fields are correct */
 496                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 497                                       inccb->ccb_h.pinfo.priority);
 498                         xpt_merge_ccb(&ccb, inccb);
 499                         xpt_action(&ccb);
 500                         bcopy(&ccb, inccb, sizeof(union ccb));
 501                         xpt_free_path(ccb.ccb_h.path);
 502                         break;
 503
 504                 }
 505                 case XPT_DEV_MATCH: {
 506                         struct cam_periph_map_info mapinfo;
 507                         struct cam_path *old_path;
 508
 509                         /*
 510                          * We can't deal with physical addresses for this
 511                          * type of transaction.
 512                          */
 513                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 514                             CAM_DATA_VADDR) {
 515                                 error = EINVAL;
 516                                 break;
 517                         }
 518
 519                         /*
 520                          * Save this in case the caller had it set to
 521                          * something in particular.
 522                          */
 523                         old_path = inccb->ccb_h.path;
 524
 525                         /*
 526                          * We really don't need a path for the matching
 527                          * code.  The path is needed because of the
 528                          * debugging statements in xpt_action().  They
 529                          * assume that the CCB has a valid path.
 530                          */
 531                         inccb->ccb_h.path = xpt_periph->path;
 532
 533                         bzero(&mapinfo, sizeof(mapinfo));
 534
 535                         /*
 536                          * Map the pattern and match buffers into kernel
 537                          * virtual address space.
 538                          */
 539                         error = cam_periph_mapmem(inccb, &mapinfo);
 540
 541                         if (error) {
 542                                 inccb->ccb_h.path = old_path;
 543                                 break;
 544                         }
 545
 546                         /*
 547                          * This is an immediate CCB, we can send it on directly.
 548                          */
 549                         xpt_action(inccb);
 550
 551                         /*
 552                          * Map the buffers back into user space.
 553                          */
 554                         cam_periph_unmapmem(inccb, &mapinfo);
 555
 556                         inccb->ccb_h.path = old_path;
 557
 558                         error = 0;
 559                         break;
 560                 }
 561                 default:
 562                         error = ENOTSUP;
 563                         break;
 564                 }
 565                 xpt_release_bus(bus);
 566                 break;
 567         }
 568         /*
 569          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 570          * with the periphal driver name and unit name filled in.  The other
 571          * fields don't really matter as input.  The passthrough driver name
 572          * ("pass"), and unit number are passed back in the ccb.  The current
 573          * device generation number, and the index into the device peripheral
 574          * driver list, and the status are also passed back.  Note that
 575          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 576          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 577          * (or rather should be) impossible for the device peripheral driver
 578          * list to change since we look at the whole thing in one pass, and
 579          * we do it with lock protection.
 580          *
 581          */
 582         case CAMGETPASSTHRU: {
 583                 union ccb *ccb;
 584                 struct cam_periph *periph;
 585                 struct periph_driver **p_drv;
 586                 char   *name;
 587                 u_int unit;
 588                 int base_periph_found;
 589
 590                 ccb = (union ccb *)addr;
 591                 unit = ccb->cgdl.unit_number;
 592                 name = ccb->cgdl.periph_name;
 593                 base_periph_found = 0;
 594
 595                 /*
 596                  * Sanity check -- make sure we don't get a null peripheral
 597                  * driver name.
 598                  */
 599                 if (*ccb->cgdl.periph_name == '\0') {
 600                         error = EINVAL;
 601                         break;
 602                 }
 603
 604                 /* Keep the list from changing while we traverse it */
 605                 xpt_lock_buses();
 606
 607                 /* first find our driver in the list of drivers */
 608                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 609                         if (strcmp((*p_drv)->driver_name, name) == 0)
 610                                 break;
 611
 612                 if (*p_drv == NULL) {
 613                         xpt_unlock_buses();
 614                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 615                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 616                         *ccb->cgdl.periph_name = '\0';
 617                         ccb->cgdl.unit_number = 0;
 618                         error = ENOENT;
 619                         break;
 620                 }
 621
 622                 /*
 623                  * Run through every peripheral instance of this driver
 624                  * and check to see whether it matches the unit passed
 625                  * in by the user.  If it does, get out of the loops and
 626                  * find the passthrough driver associated with that
 627                  * peripheral driver.
 628                  */
 629                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 630                      periph = TAILQ_NEXT(periph, unit_links)) {
 631
 632                         if (periph->unit_number == unit)
 633                                 break;
 634                 }
 635                 /*
 636                  * If we found the peripheral driver that the user passed
 637                  * in, go through all of the peripheral drivers for that
 638                  * particular device and look for a passthrough driver.
 639                  */
 640                 if (periph != NULL) {
 641                         struct cam_ed *device;
 642                         int i;
 643
 644                         base_periph_found = 1;
 645                         device = periph->path->device;
 646                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 647                              periph != NULL;
 648                              periph = SLIST_NEXT(periph, periph_links), i++) {
 649                                 /*
 650                                  * Check to see whether we have a
 651                                  * passthrough device or not.
 652                                  */
 653                                 if (strcmp(periph->periph_name, "pass") == 0) {
 654                                         /*
 655                                          * Fill in the getdevlist fields.
 656                                          */
 657                                         strcpy(ccb->cgdl.periph_name,
 658                                                periph->periph_name);
 659                                         ccb->cgdl.unit_number =
 660                                                 periph->unit_number;
 661                                         if (SLIST_NEXT(periph, periph_links))
 662                                                 ccb->cgdl.status =
 663                                                         CAM_GDEVLIST_MORE_DEVS;
 664                                         else
 665                                                 ccb->cgdl.status =
 666                                                        CAM_GDEVLIST_LAST_DEVICE;
 667                                         ccb->cgdl.generation =
 668                                                 device->generation;
 669                                         ccb->cgdl.index = i;
 670                                         /*
 671                                          * Fill in some CCB header fields
 672                                          * that the user may want.
 673                                          */
 674                                         ccb->ccb_h.path_id =
 675                                                 periph->path->bus->path_id;
 676                                         ccb->ccb_h.target_id =
 677                                                 periph->path->target->target_id;
 678                                         ccb->ccb_h.target_lun =
 679                                                 periph->path->device->lun_id;
 680                                         ccb->ccb_h.status = CAM_REQ_CMP;
 681                                         break;
 682                                 }
 683                         }
 684                 }
 685
 686                 /*
 687                  * If the periph is null here, one of two things has
 688                  * happened.  The first possibility is that we couldn't
 689                  * find the unit number of the particular peripheral driver
 690                  * that the user is asking about.  e.g. the user asks for
 691                  * the passthrough driver for "da11".  We find the list of
 692                  * "da" peripherals all right, but there is no unit 11.
 693                  * The other possibility is that we went through the list
 694                  * of peripheral drivers attached to the device structure,
 695                  * but didn't find one with the name "pass".  Either way,
 696                  * we return ENOENT, since we couldn't find something.
 697                  */
 698                 if (periph == NULL) {
 699                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 700                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 701                         *ccb->cgdl.periph_name = '\0';
 702                         ccb->cgdl.unit_number = 0;
 703                         error = ENOENT;
 704                         /*
 705                          * It is unfortunate that this is even necessary,
 706                          * but there are many, many clueless users out there.
 707                          * If this is true, the user is looking for the
 708                          * passthrough driver, but doesn't have one in his
 709                          * kernel.
 710                          */
 711                         if (base_periph_found == 1) {
 712                                 printf("xptioctl: pass driver is not in the "
 713                                        "kernel\n");
 714                                 printf("xptioctl: put \"device pass\" in "
 715                                        "your kernel config file\n");
 716                         }
 717                 }
 718                 xpt_unlock_buses();
 719                 break;
 720                 }
 721         default:
 722                 error = ENOTTY;
 723                 break;
 724         }
 725
 726         return(error);
 727 }
 728
 729 static int
 730 cam_module_event_handler(module_t mod, int what, void *arg)
 731 {
 732         int error;
 733
 734         switch (what) {
 735         case MOD_LOAD:
 736                 if ((error = xpt_init(NULL)) != 0)
 737                         return (error);
 738                 break;
 739         case MOD_UNLOAD:
 740                 return EBUSY;
 741         default:
 742                 return EOPNOTSUPP;
 743         }
 744
 745         return 0;
 746 }
 747
 748 static void
 749 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 750 {
 751
 752         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 753                 xpt_free_path(done_ccb->ccb_h.path);
 754                 xpt_free_ccb(done_ccb);
 755         } else {
 756                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 757                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 758         }
 759         xpt_release_boot();
 760 }
 761
 762 /* thread to handle bus rescans */
 763 static void
 764 xpt_scanner_thread(void *dummy)
 765 {
 766         union ccb       *ccb;
 767         struct cam_path  path;
 768
 769         xpt_lock_buses();
 770         for (;;) {
 771                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 772                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 773                                "-", 0);
 774                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 775                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 776                         xpt_unlock_buses();
 777
 778                         /*
 779                          * Since lock can be dropped inside and path freed
 780                          * by completion callback even before return here,
 781                          * take our own path copy for reference.
 782                          */
 783                         xpt_copy_path(&path, ccb->ccb_h.path);
 784                         xpt_path_lock(&path);
 785                         xpt_action(ccb);
 786                         xpt_path_unlock(&path);
 787                         xpt_release_path(&path);
 788
 789                         xpt_lock_buses();
 790                 }
 791         }
 792 }
 793
 794 void
 795 xpt_rescan(union ccb *ccb)
 796 {
 797         struct ccb_hdr *hdr;
 798
 799         /* Prepare request */
 800         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 801             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 802                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 803         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 804             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 805                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 806         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 807             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 808                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 809         else {
 810                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 811                 xpt_free_path(ccb->ccb_h.path);
 812                 xpt_free_ccb(ccb);
 813                 return;
 814         }
 815         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 816         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 817         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 818         /* Don't make duplicate entries for the same paths. */
 819         xpt_lock_buses();
 820         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 821                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 822                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 823                                 wakeup(&xsoftc.ccb_scanq);
 824                                 xpt_unlock_buses();
 825                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 826                                 xpt_free_path(ccb->ccb_h.path);
 827                                 xpt_free_ccb(ccb);
 828                                 return;
 829                         }
 830                 }
 831         }
 832         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 833         xsoftc.buses_to_config++;
 834         wakeup(&xsoftc.ccb_scanq);
 835         xpt_unlock_buses();
 836 }
 837
 838 /* Functions accessed by the peripheral drivers */
 839 static int
 840 xpt_init(void *dummy)
 841 {
 842         struct cam_sim *xpt_sim;
 843         struct cam_path *path;
 844         struct cam_devq *devq;
 845         cam_status status;
 846         int error, i;
 847
 848         TAILQ_INIT(&xsoftc.xpt_busses);
 849         TAILQ_INIT(&xsoftc.ccb_scanq);
 850         STAILQ_INIT(&xsoftc.highpowerq);
 851         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 852
 853         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 854         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 855         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 856             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 857
 858 #ifdef CAM_BOOT_DELAY
 859         /*
 860          * Override this value at compile time to assist our users
 861          * who don't use loader to boot a kernel.
 862          */
 863         xsoftc.boot_delay = CAM_BOOT_DELAY;
 864 #endif
 865         /*
 866          * The xpt layer is, itself, the equivelent of a SIM.
 867          * Allow 16 ccbs in the ccb pool for it.  This should
 868          * give decent parallelism when we probe busses and
 869          * perform other XPT functions.
 870          */
 871         devq = cam_simq_alloc(16);
 872         xpt_sim = cam_sim_alloc(xptaction,
 873                                 xptpoll,
 874                                 "xpt",
 875                                 /*softc*/NULL,
 876                                 /*unit*/0,
 877                                 /*mtx*/&xsoftc.xpt_lock,
 878                                 /*max_dev_transactions*/0,
 879                                 /*max_tagged_dev_transactions*/0,
 880                                 devq);
 881         if (xpt_sim == NULL)
 882                 return (ENOMEM);
 883
 884         mtx_lock(&xsoftc.xpt_lock);
 885         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 886                 mtx_unlock(&xsoftc.xpt_lock);
 887                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 888                        " failing attach\n", status);
 889                 return (EINVAL);
 890         }
 891         mtx_unlock(&xsoftc.xpt_lock);
 892
 893         /*
 894          * Looking at the XPT from the SIM layer, the XPT is
 895          * the equivelent of a peripheral driver.  Allocate
 896          * a peripheral driver entry for us.
 897          */
 898         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 899                                       CAM_TARGET_WILDCARD,
 900                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 901                 printf("xpt_init: xpt_create_path failed with status %#x,"
 902                        " failing attach\n", status);
 903                 return (EINVAL);
 904         }
 905         xpt_path_lock(path);
 906         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 907                          path, NULL, 0, xpt_sim);
 908         xpt_path_unlock(path);
 909         xpt_free_path(path);
 910
 911         if (cam_num_doneqs < 1)
 912                 cam_num_doneqs = 1 + mp_ncpus / 6;
 913         else if (cam_num_doneqs > MAXCPU)
 914                 cam_num_doneqs = MAXCPU;
 915         for (i = 0; i < cam_num_doneqs; i++) {
 916                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 917                     MTX_DEF);
 918                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 919                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 920                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 921                 if (error != 0) {
 922                         cam_num_doneqs = i;
 923                         break;
 924                 }
 925         }
 926         if (cam_num_doneqs < 1) {
 927                 printf("xpt_init: Cannot init completion queues "
 928                        "- failing attach\n");
 929                 return (ENOMEM);
 930         }
 931         /*
 932          * Register a callback for when interrupts are enabled.
 933          */
 934         xsoftc.xpt_config_hook =
 935             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 936                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 937         if (xsoftc.xpt_config_hook == NULL) {
 938                 printf("xpt_init: Cannot malloc config hook "
 939                        "- failing attach\n");
 940                 return (ENOMEM);
 941         }
 942         xsoftc.xpt_config_hook->ich_func = xpt_config;
 943         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 944                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 945                 printf("xpt_init: config_intrhook_establish failed "
 946                        "- failing attach\n");
 947         }
 948
 949         return (0);
 950 }
 951
 952 static cam_status
 953 xptregister(struct cam_periph *periph, void *arg)
 954 {
 955         struct cam_sim *xpt_sim;
 956
 957         if (periph == NULL) {
 958                 printf("xptregister: periph was NULL!!\n");
 959                 return(CAM_REQ_CMP_ERR);
 960         }
 961
 962         xpt_sim = (struct cam_sim *)arg;
 963         xpt_sim->softc = periph;
 964         xpt_periph = periph;
 965         periph->softc = NULL;
 966
 967         return(CAM_REQ_CMP);
 968 }
 969
 970 int32_t
 971 xpt_add_periph(struct cam_periph *periph)
 972 {
 973         struct cam_ed *device;
 974         int32_t  status;
 975
 976         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
 977         device = periph->path->device;
 978         status = CAM_REQ_CMP;
 979         if (device != NULL) {
 980                 mtx_lock(&device->target->bus->eb_mtx);
 981                 device->generation++;
 982                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
 983                 mtx_unlock(&device->target->bus->eb_mtx);
 984         }
 985
 986         return (status);
 987 }
 988
 989 void
 990 xpt_remove_periph(struct cam_periph *periph)
 991 {
 992         struct cam_ed *device;
 993
 994         device = periph->path->device;
 995         if (device != NULL) {
 996                 mtx_lock(&device->target->bus->eb_mtx);
 997                 device->generation++;
 998                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
 999                 mtx_unlock(&device->target->bus->eb_mtx);
1000         }
1001 }
1002
1003
1004 void
1005 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1006 {
1007         struct  cam_path *path = periph->path;
1008
1009         cam_periph_assert(periph, MA_OWNED);
1010         periph->flags |= CAM_PERIPH_ANNOUNCED;
1011
1012         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1013                periph->periph_name, periph->unit_number,
1014                path->bus->sim->sim_name,
1015                path->bus->sim->unit_number,
1016                path->bus->sim->bus_id,
1017                path->bus->path_id,
1018                path->target->target_id,
1019                (uintmax_t)path->device->lun_id);
1020         printf("%s%d: ", periph->periph_name, periph->unit_number);
1021         if (path->device->protocol == PROTO_SCSI)
1022                 scsi_print_inquiry(&path->device->inq_data);
1023         else if (path->device->protocol == PROTO_ATA ||
1024             path->device->protocol == PROTO_SATAPM)
1025                 ata_print_ident(&path->device->ident_data);
1026         else if (path->device->protocol == PROTO_SEMB)
1027                 semb_print_ident(
1028                     (struct sep_identify_data *)&path->device->ident_data);
1029         else
1030                 printf("Unknown protocol device\n");
1031         if (path->device->serial_num_len > 0) {
1032                 /* Don't wrap the screen  - print only the first 60 chars */
1033                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1034                        periph->unit_number, path->device->serial_num);
1035         }
1036         /* Announce transport details. */
1037         (*(path->bus->xport->announce))(periph);
1038         /* Announce command queueing. */
1039         if (path->device->inq_flags & SID_CmdQue
1040          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1041                 printf("%s%d: Command Queueing enabled\n",
1042                        periph->periph_name, periph->unit_number);
1043         }
1044         /* Announce caller's details if they've passed in. */
1045         if (announce_string != NULL)
1046                 printf("%s%d: %s\n", periph->periph_name,
1047                        periph->unit_number, announce_string);
1048 }
1049
1050 void
1051 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1052 {
1053         if (quirks != 0) {
1054                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1055                     periph->unit_number, quirks, bit_string);
1056         }
1057 }
1058
1059 void
1060 xpt_denounce_periph(struct cam_periph *periph)
1061 {
1062         struct  cam_path *path = periph->path;
1063
1064         cam_periph_assert(periph, MA_OWNED);
1065         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1066                periph->periph_name, periph->unit_number,
1067                path->bus->sim->sim_name,
1068                path->bus->sim->unit_number,
1069                path->bus->sim->bus_id,
1070                path->bus->path_id,
1071                path->target->target_id,
1072                (uintmax_t)path->device->lun_id);
1073         printf("%s%d: ", periph->periph_name, periph->unit_number);
1074         if (path->device->protocol == PROTO_SCSI)
1075                 scsi_print_inquiry_short(&path->device->inq_data);
1076         else if (path->device->protocol == PROTO_ATA ||
1077             path->device->protocol == PROTO_SATAPM)
1078                 ata_print_ident_short(&path->device->ident_data);
1079         else if (path->device->protocol == PROTO_SEMB)
1080                 semb_print_ident_short(
1081                     (struct sep_identify_data *)&path->device->ident_data);
1082         else
1083                 printf("Unknown protocol device");
1084         if (path->device->serial_num_len > 0)
1085                 printf(" s/n %.60s", path->device->serial_num);
1086         printf(" detached\n");
1087 }
1088
1089
1090 int
1091 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1092 {
1093         int ret = -1, l;
1094         struct ccb_dev_advinfo cdai;
1095         struct scsi_vpd_id_descriptor *idd;
1096
1097         xpt_path_assert(path, MA_OWNED);
1098
1099         memset(&cdai, 0, sizeof(cdai));
1100         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1101         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1102         cdai.bufsiz = len;
1103
1104         if (!strcmp(attr, "GEOM::ident"))
1105                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1106         else if (!strcmp(attr, "GEOM::physpath"))
1107                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1108         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1109                  strcmp(attr, "GEOM::lunname") == 0) {
1110                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1111                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1112         } else
1113                 goto out;
1114
1115         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1116         if (cdai.buf == NULL) {
1117                 ret = ENOMEM;
1118                 goto out;
1119         }
1120         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1121         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1122                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1123         if (cdai.provsiz == 0)
1124                 goto out;
1125         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1126                 if (strcmp(attr, "GEOM::lunid") == 0) {
1127                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1128                             cdai.provsiz, scsi_devid_is_lun_naa);
1129                         if (idd == NULL)
1130                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1131                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1132                 } else
1133                         idd = NULL;
1134                 if (idd == NULL)
1135                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1136                             cdai.provsiz, scsi_devid_is_lun_t10);
1137                 if (idd == NULL)
1138                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1139                             cdai.provsiz, scsi_devid_is_lun_name);
1140                 if (idd == NULL)
1141                         goto out;
1142                 ret = 0;
1143                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1144                         if (idd->length < len) {
1145                                 for (l = 0; l < idd->length; l++)
1146                                         buf[l] = idd->identifier[l] ?
1147                                             idd->identifier[l] : ' ';
1148                                 buf[l] = 0;
1149                         } else
1150                                 ret = EFAULT;
1151                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1152                         l = strnlen(idd->identifier, idd->length);
1153                         if (l < len) {
1154                                 bcopy(idd->identifier, buf, l);
1155                                 buf[l] = 0;
1156                         } else
1157                                 ret = EFAULT;
1158                 } else {
1159                         if (idd->length * 2 < len) {
1160                                 for (l = 0; l < idd->length; l++)
1161                                         sprintf(buf + l * 2, "%02x",
1162                                             idd->identifier[l]);
1163                         } else
1164                                 ret = EFAULT;
1165                 }
1166         } else {
1167                 ret = 0;
1168                 if (strlcpy(buf, cdai.buf, len) >= len)
1169                         ret = EFAULT;
1170         }
1171
1172 out:
1173         if (cdai.buf != NULL)
1174                 free(cdai.buf, M_CAMXPT);
1175         return ret;
1176 }
1177
1178 static dev_match_ret
1179 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1180             struct cam_eb *bus)
1181 {
1182         dev_match_ret retval;
1183         int i;
1184
1185         retval = DM_RET_NONE;
1186
1187         /*
1188          * If we aren't given something to match against, that's an error.
1189          */
1190         if (bus == NULL)
1191                 return(DM_RET_ERROR);
1192
1193         /*
1194          * If there are no match entries, then this bus matches no
1195          * matter what.
1196          */
1197         if ((patterns == NULL) || (num_patterns == 0))
1198                 return(DM_RET_DESCEND | DM_RET_COPY);
1199
1200         for (i = 0; i < num_patterns; i++) {
1201                 struct bus_match_pattern *cur_pattern;
1202
1203                 /*
1204                  * If the pattern in question isn't for a bus node, we
1205                  * aren't interested.  However, we do indicate to the
1206                  * calling routine that we should continue descending the
1207                  * tree, since the user wants to match against lower-level
1208                  * EDT elements.
1209                  */
1210                 if (patterns[i].type != DEV_MATCH_BUS) {
1211                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1212                                 retval |= DM_RET_DESCEND;
1213                         continue;
1214                 }
1215
1216                 cur_pattern = &patterns[i].pattern.bus_pattern;
1217
1218                 /*
1219                  * If they want to match any bus node, we give them any
1220                  * device node.
1221                  */
1222                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1223                         /* set the copy flag */
1224                         retval |= DM_RET_COPY;
1225
1226                         /*
1227                          * If we've already decided on an action, go ahead
1228                          * and return.
1229                          */
1230                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1231                                 return(retval);
1232                 }
1233
1234                 /*
1235                  * Not sure why someone would do this...
1236                  */
1237                 if (cur_pattern->flags == BUS_MATCH_NONE)
1238                         continue;
1239
1240                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1241                  && (cur_pattern->path_id != bus->path_id))
1242                         continue;
1243
1244                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1245                  && (cur_pattern->bus_id != bus->sim->bus_id))
1246                         continue;
1247
1248                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1249                  && (cur_pattern->unit_number != bus->sim->unit_number))
1250                         continue;
1251
1252                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1253                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1254                              DEV_IDLEN) != 0))
1255                         continue;
1256
1257                 /*
1258                  * If we get to this point, the user definitely wants
1259                  * information on this bus.  So tell the caller to copy the
1260                  * data out.
1261                  */
1262                 retval |= DM_RET_COPY;
1263
1264                 /*
1265                  * If the return action has been set to descend, then we
1266                  * know that we've already seen a non-bus matching
1267                  * expression, therefore we need to further descend the tree.
1268                  * This won't change by continuing around the loop, so we
1269                  * go ahead and return.  If we haven't seen a non-bus
1270                  * matching expression, we keep going around the loop until
1271                  * we exhaust the matching expressions.  We'll set the stop
1272                  * flag once we fall out of the loop.
1273                  */
1274                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1275                         return(retval);
1276         }
1277
1278         /*
1279          * If the return action hasn't been set to descend yet, that means
1280          * we haven't seen anything other than bus matching patterns.  So
1281          * tell the caller to stop descending the tree -- the user doesn't
1282          * want to match against lower level tree elements.
1283          */
1284         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1285                 retval |= DM_RET_STOP;
1286
1287         return(retval);
1288 }
1289
1290 static dev_match_ret
1291 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1292                struct cam_ed *device)
1293 {
1294         dev_match_ret retval;
1295         int i;
1296
1297         retval = DM_RET_NONE;
1298
1299         /*
1300          * If we aren't given something to match against, that's an error.
1301          */
1302         if (device == NULL)
1303                 return(DM_RET_ERROR);
1304
1305         /*
1306          * If there are no match entries, then this device matches no
1307          * matter what.
1308          */
1309         if ((patterns == NULL) || (num_patterns == 0))
1310                 return(DM_RET_DESCEND | DM_RET_COPY);
1311
1312         for (i = 0; i < num_patterns; i++) {
1313                 struct device_match_pattern *cur_pattern;
1314                 struct scsi_vpd_device_id *device_id_page;
1315
1316                 /*
1317                  * If the pattern in question isn't for a device node, we
1318                  * aren't interested.
1319                  */
1320                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1321                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1322                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1323                                 retval |= DM_RET_DESCEND;
1324                         continue;
1325                 }
1326
1327                 cur_pattern = &patterns[i].pattern.device_pattern;
1328
1329                 /* Error out if mutually exclusive options are specified. */
1330                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1331                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1332                         return(DM_RET_ERROR);
1333
1334                 /*
1335                  * If they want to match any device node, we give them any
1336                  * device node.
1337                  */
1338                 if (cur_pattern->flags == DEV_MATCH_ANY)
1339                         goto copy_dev_node;
1340
1341                 /*
1342                  * Not sure why someone would do this...
1343                  */
1344                 if (cur_pattern->flags == DEV_MATCH_NONE)
1345                         continue;
1346
1347                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1348                  && (cur_pattern->path_id != device->target->bus->path_id))
1349                         continue;
1350
1351                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1352                  && (cur_pattern->target_id != device->target->target_id))
1353                         continue;
1354
1355                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1356                  && (cur_pattern->target_lun != device->lun_id))
1357                         continue;
1358
1359                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1360                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1361                                     (caddr_t)&cur_pattern->data.inq_pat,
1362                                     1, sizeof(cur_pattern->data.inq_pat),
1363                                     scsi_static_inquiry_match) == NULL))
1364                         continue;
1365
1366                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1367                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1368                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1369                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1370                                       device->device_id_len
1371                                     - SVPD_DEVICE_ID_HDR_LEN,
1372                                       cur_pattern->data.devid_pat.id,
1373                                       cur_pattern->data.devid_pat.id_len) != 0))
1374                         continue;
1375
1376 copy_dev_node:
1377                 /*
1378                  * If we get to this point, the user definitely wants
1379                  * information on this device.  So tell the caller to copy
1380                  * the data out.
1381                  */
1382                 retval |= DM_RET_COPY;
1383
1384                 /*
1385                  * If the return action has been set to descend, then we
1386                  * know that we've already seen a peripheral matching
1387                  * expression, therefore we need to further descend the tree.
1388                  * This won't change by continuing around the loop, so we
1389                  * go ahead and return.  If we haven't seen a peripheral
1390                  * matching expression, we keep going around the loop until
1391                  * we exhaust the matching expressions.  We'll set the stop
1392                  * flag once we fall out of the loop.
1393                  */
1394                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1395                         return(retval);
1396         }
1397
1398         /*
1399          * If the return action hasn't been set to descend yet, that means
1400          * we haven't seen any peripheral matching patterns.  So tell the
1401          * caller to stop descending the tree -- the user doesn't want to
1402          * match against lower level tree elements.
1403          */
1404         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1405                 retval |= DM_RET_STOP;
1406
1407         return(retval);
1408 }
1409
1410 /*
1411  * Match a single peripheral against any number of match patterns.
1412  */
1413 static dev_match_ret
1414 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1415                struct cam_periph *periph)
1416 {
1417         dev_match_ret retval;
1418         int i;
1419
1420         /*
1421          * If we aren't given something to match against, that's an error.
1422          */
1423         if (periph == NULL)
1424                 return(DM_RET_ERROR);
1425
1426         /*
1427          * If there are no match entries, then this peripheral matches no
1428          * matter what.
1429          */
1430         if ((patterns == NULL) || (num_patterns == 0))
1431                 return(DM_RET_STOP | DM_RET_COPY);
1432
1433         /*
1434          * There aren't any nodes below a peripheral node, so there's no
1435          * reason to descend the tree any further.
1436          */
1437         retval = DM_RET_STOP;
1438
1439         for (i = 0; i < num_patterns; i++) {
1440                 struct periph_match_pattern *cur_pattern;
1441
1442                 /*
1443                  * If the pattern in question isn't for a peripheral, we
1444                  * aren't interested.
1445                  */
1446                 if (patterns[i].type != DEV_MATCH_PERIPH)
1447                         continue;
1448
1449                 cur_pattern = &patterns[i].pattern.periph_pattern;
1450
1451                 /*
1452                  * If they want to match on anything, then we will do so.
1453                  */
1454                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1455                         /* set the copy flag */
1456                         retval |= DM_RET_COPY;
1457
1458                         /*
1459                          * We've already set the return action to stop,
1460                          * since there are no nodes below peripherals in
1461                          * the tree.
1462                          */
1463                         return(retval);
1464                 }
1465
1466                 /*
1467                  * Not sure why someone would do this...
1468                  */
1469                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1470                         continue;
1471
1472                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1473                  && (cur_pattern->path_id != periph->path->bus->path_id))
1474                         continue;
1475
1476                 /*
1477                  * For the target and lun id's, we have to make sure the
1478                  * target and lun pointers aren't NULL.  The xpt peripheral
1479                  * has a wildcard target and device.
1480                  */
1481                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1482                  && ((periph->path->target == NULL)
1483                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1484                         continue;
1485
1486                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1487                  && ((periph->path->device == NULL)
1488                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1489                         continue;
1490
1491                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1492                  && (cur_pattern->unit_number != periph->unit_number))
1493                         continue;
1494
1495                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1496                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1497                              DEV_IDLEN) != 0))
1498                         continue;
1499
1500                 /*
1501                  * If we get to this point, the user definitely wants
1502                  * information on this peripheral.  So tell the caller to
1503                  * copy the data out.
1504                  */
1505                 retval |= DM_RET_COPY;
1506
1507                 /*
1508                  * The return action has already been set to stop, since
1509                  * peripherals don't have any nodes below them in the EDT.
1510                  */
1511                 return(retval);
1512         }
1513
1514         /*
1515          * If we get to this point, the peripheral that was passed in
1516          * doesn't match any of the patterns.
1517          */
1518         return(retval);
1519 }
1520
1521 static int
1522 xptedtbusfunc(struct cam_eb *bus, void *arg)
1523 {
1524         struct ccb_dev_match *cdm;
1525         struct cam_et *target;
1526         dev_match_ret retval;
1527
1528         cdm = (struct ccb_dev_match *)arg;
1529
1530         /*
1531          * If our position is for something deeper in the tree, that means
1532          * that we've already seen this node.  So, we keep going down.
1533          */
1534         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1535          && (cdm->pos.cookie.bus == bus)
1536          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1537          && (cdm->pos.cookie.target != NULL))
1538                 retval = DM_RET_DESCEND;
1539         else
1540                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1541
1542         /*
1543          * If we got an error, bail out of the search.
1544          */
1545         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1546                 cdm->status = CAM_DEV_MATCH_ERROR;
1547                 return(0);
1548         }
1549
1550         /*
1551          * If the copy flag is set, copy this bus out.
1552          */
1553         if (retval & DM_RET_COPY) {
1554                 int spaceleft, j;
1555
1556                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1557                         sizeof(struct dev_match_result));
1558
1559                 /*
1560                  * If we don't have enough space to put in another
1561                  * match result, save our position and tell the
1562                  * user there are more devices to check.
1563                  */
1564                 if (spaceleft < sizeof(struct dev_match_result)) {
1565                         bzero(&cdm->pos, sizeof(cdm->pos));
1566                         cdm->pos.position_type =
1567                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1568
1569                         cdm->pos.cookie.bus = bus;
1570                         cdm->pos.generations[CAM_BUS_GENERATION]=
1571                                 xsoftc.bus_generation;
1572                         cdm->status = CAM_DEV_MATCH_MORE;
1573                         return(0);
1574                 }
1575                 j = cdm->num_matches;
1576                 cdm->num_matches++;
1577                 cdm->matches[j].type = DEV_MATCH_BUS;
1578                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1579                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1580                 cdm->matches[j].result.bus_result.unit_number =
1581                         bus->sim->unit_number;
1582                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1583                         bus->sim->sim_name, DEV_IDLEN);
1584         }
1585
1586         /*
1587          * If the user is only interested in busses, there's no
1588          * reason to descend to the next level in the tree.
1589          */
1590         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1591                 return(1);
1592
1593         /*
1594          * If there is a target generation recorded, check it to
1595          * make sure the target list hasn't changed.
1596          */
1597         mtx_lock(&bus->eb_mtx);
1598         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1599          && (cdm->pos.cookie.bus == bus)
1600          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1601          && (cdm->pos.cookie.target != NULL)) {
1602                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1603                     bus->generation)) {
1604                         mtx_unlock(&bus->eb_mtx);
1605                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1606                         return (0);
1607                 }
1608                 target = (struct cam_et *)cdm->pos.cookie.target;
1609                 target->refcount++;
1610         } else
1611                 target = NULL;
1612         mtx_unlock(&bus->eb_mtx);
1613
1614         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1615 }
1616
1617 static int
1618 xptedttargetfunc(struct cam_et *target, void *arg)
1619 {
1620         struct ccb_dev_match *cdm;
1621         struct cam_eb *bus;
1622         struct cam_ed *device;
1623
1624         cdm = (struct ccb_dev_match *)arg;
1625         bus = target->bus;
1626
1627         /*
1628          * If there is a device list generation recorded, check it to
1629          * make sure the device list hasn't changed.
1630          */
1631         mtx_lock(&bus->eb_mtx);
1632         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1633          && (cdm->pos.cookie.bus == bus)
1634          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1635          && (cdm->pos.cookie.target == target)
1636          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1637          && (cdm->pos.cookie.device != NULL)) {
1638                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1639                     target->generation) {
1640                         mtx_unlock(&bus->eb_mtx);
1641                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1642                         return(0);
1643                 }
1644                 device = (struct cam_ed *)cdm->pos.cookie.device;
1645                 device->refcount++;
1646         } else
1647                 device = NULL;
1648         mtx_unlock(&bus->eb_mtx);
1649
1650         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1651 }
1652
1653 static int
1654 xptedtdevicefunc(struct cam_ed *device, void *arg)
1655 {
1656         struct cam_eb *bus;
1657         struct cam_periph *periph;
1658         struct ccb_dev_match *cdm;
1659         dev_match_ret retval;
1660
1661         cdm = (struct ccb_dev_match *)arg;
1662         bus = device->target->bus;
1663
1664         /*
1665          * If our position is for something deeper in the tree, that means
1666          * that we've already seen this node.  So, we keep going down.
1667          */
1668         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1669          && (cdm->pos.cookie.device == device)
1670          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1671          && (cdm->pos.cookie.periph != NULL))
1672                 retval = DM_RET_DESCEND;
1673         else
1674                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1675                                         device);
1676
1677         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1678                 cdm->status = CAM_DEV_MATCH_ERROR;
1679                 return(0);
1680         }
1681
1682         /*
1683          * If the copy flag is set, copy this device out.
1684          */
1685         if (retval & DM_RET_COPY) {
1686                 int spaceleft, j;
1687
1688                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1689                         sizeof(struct dev_match_result));
1690
1691                 /*
1692                  * If we don't have enough space to put in another
1693                  * match result, save our position and tell the
1694                  * user there are more devices to check.
1695                  */
1696                 if (spaceleft < sizeof(struct dev_match_result)) {
1697                         bzero(&cdm->pos, sizeof(cdm->pos));
1698                         cdm->pos.position_type =
1699                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1700                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1701
1702                         cdm->pos.cookie.bus = device->target->bus;
1703                         cdm->pos.generations[CAM_BUS_GENERATION]=
1704                                 xsoftc.bus_generation;
1705                         cdm->pos.cookie.target = device->target;
1706                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1707                                 device->target->bus->generation;
1708                         cdm->pos.cookie.device = device;
1709                         cdm->pos.generations[CAM_DEV_GENERATION] =
1710                                 device->target->generation;
1711                         cdm->status = CAM_DEV_MATCH_MORE;
1712                         return(0);
1713                 }
1714                 j = cdm->num_matches;
1715                 cdm->num_matches++;
1716                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1717                 cdm->matches[j].result.device_result.path_id =
1718                         device->target->bus->path_id;
1719                 cdm->matches[j].result.device_result.target_id =
1720                         device->target->target_id;
1721                 cdm->matches[j].result.device_result.target_lun =
1722                         device->lun_id;
1723                 cdm->matches[j].result.device_result.protocol =
1724                         device->protocol;
1725                 bcopy(&device->inq_data,
1726                       &cdm->matches[j].result.device_result.inq_data,
1727                       sizeof(struct scsi_inquiry_data));
1728                 bcopy(&device->ident_data,
1729                       &cdm->matches[j].result.device_result.ident_data,
1730                       sizeof(struct ata_params));
1731
1732                 /* Let the user know whether this device is unconfigured */
1733                 if (device->flags & CAM_DEV_UNCONFIGURED)
1734                         cdm->matches[j].result.device_result.flags =
1735                                 DEV_RESULT_UNCONFIGURED;
1736                 else
1737                         cdm->matches[j].result.device_result.flags =
1738                                 DEV_RESULT_NOFLAG;
1739         }
1740
1741         /*
1742          * If the user isn't interested in peripherals, don't descend
1743          * the tree any further.
1744          */
1745         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1746                 return(1);
1747
1748         /*
1749          * If there is a peripheral list generation recorded, make sure
1750          * it hasn't changed.
1751          */
1752         xpt_lock_buses();
1753         mtx_lock(&bus->eb_mtx);
1754         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1755          && (cdm->pos.cookie.bus == bus)
1756          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1757          && (cdm->pos.cookie.target == device->target)
1758          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1759          && (cdm->pos.cookie.device == device)
1760          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1761          && (cdm->pos.cookie.periph != NULL)) {
1762                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1763                     device->generation) {
1764                         mtx_unlock(&bus->eb_mtx);
1765                         xpt_unlock_buses();
1766                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1767                         return(0);
1768                 }
1769                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1770                 periph->refcount++;
1771         } else
1772                 periph = NULL;
1773         mtx_unlock(&bus->eb_mtx);
1774         xpt_unlock_buses();
1775
1776         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1777 }
1778
1779 static int
1780 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1781 {
1782         struct ccb_dev_match *cdm;
1783         dev_match_ret retval;
1784
1785         cdm = (struct ccb_dev_match *)arg;
1786
1787         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1788
1789         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1790                 cdm->status = CAM_DEV_MATCH_ERROR;
1791                 return(0);
1792         }
1793
1794         /*
1795          * If the copy flag is set, copy this peripheral out.
1796          */
1797         if (retval & DM_RET_COPY) {
1798                 int spaceleft, j;
1799
1800                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1801                         sizeof(struct dev_match_result));
1802
1803                 /*
1804                  * If we don't have enough space to put in another
1805                  * match result, save our position and tell the
1806                  * user there are more devices to check.
1807                  */
1808                 if (spaceleft < sizeof(struct dev_match_result)) {
1809                         bzero(&cdm->pos, sizeof(cdm->pos));
1810                         cdm->pos.position_type =
1811                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1812                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1813                                 CAM_DEV_POS_PERIPH;
1814
1815                         cdm->pos.cookie.bus = periph->path->bus;
1816                         cdm->pos.generations[CAM_BUS_GENERATION]=
1817                                 xsoftc.bus_generation;
1818                         cdm->pos.cookie.target = periph->path->target;
1819                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1820                                 periph->path->bus->generation;
1821                         cdm->pos.cookie.device = periph->path->device;
1822                         cdm->pos.generations[CAM_DEV_GENERATION] =
1823                                 periph->path->target->generation;
1824                         cdm->pos.cookie.periph = periph;
1825                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1826                                 periph->path->device->generation;
1827                         cdm->status = CAM_DEV_MATCH_MORE;
1828                         return(0);
1829                 }
1830
1831                 j = cdm->num_matches;
1832                 cdm->num_matches++;
1833                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1834                 cdm->matches[j].result.periph_result.path_id =
1835                         periph->path->bus->path_id;
1836                 cdm->matches[j].result.periph_result.target_id =
1837                         periph->path->target->target_id;
1838                 cdm->matches[j].result.periph_result.target_lun =
1839                         periph->path->device->lun_id;
1840                 cdm->matches[j].result.periph_result.unit_number =
1841                         periph->unit_number;
1842                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1843                         periph->periph_name, DEV_IDLEN);
1844         }
1845
1846         return(1);
1847 }
1848
1849 static int
1850 xptedtmatch(struct ccb_dev_match *cdm)
1851 {
1852         struct cam_eb *bus;
1853         int ret;
1854
1855         cdm->num_matches = 0;
1856
1857         /*
1858          * Check the bus list generation.  If it has changed, the user
1859          * needs to reset everything and start over.
1860          */
1861         xpt_lock_buses();
1862         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1863          && (cdm->pos.cookie.bus != NULL)) {
1864                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1865                     xsoftc.bus_generation) {
1866                         xpt_unlock_buses();
1867                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1868                         return(0);
1869                 }
1870                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1871                 bus->refcount++;
1872         } else
1873                 bus = NULL;
1874         xpt_unlock_buses();
1875
1876         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1877
1878         /*
1879          * If we get back 0, that means that we had to stop before fully
1880          * traversing the EDT.  It also means that one of the subroutines
1881          * has set the status field to the proper value.  If we get back 1,
1882          * we've fully traversed the EDT and copied out any matching entries.
1883          */
1884         if (ret == 1)
1885                 cdm->status = CAM_DEV_MATCH_LAST;
1886
1887         return(ret);
1888 }
1889
1890 static int
1891 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1892 {
1893         struct cam_periph *periph;
1894         struct ccb_dev_match *cdm;
1895
1896         cdm = (struct ccb_dev_match *)arg;
1897
1898         xpt_lock_buses();
1899         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1900          && (cdm->pos.cookie.pdrv == pdrv)
1901          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1902          && (cdm->pos.cookie.periph != NULL)) {
1903                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1904                     (*pdrv)->generation) {
1905                         xpt_unlock_buses();
1906                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1907                         return(0);
1908                 }
1909                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1910                 periph->refcount++;
1911         } else
1912                 periph = NULL;
1913         xpt_unlock_buses();
1914
1915         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1916 }
1917
1918 static int
1919 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1920 {
1921         struct ccb_dev_match *cdm;
1922         dev_match_ret retval;
1923
1924         cdm = (struct ccb_dev_match *)arg;
1925
1926         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1927
1928         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1929                 cdm->status = CAM_DEV_MATCH_ERROR;
1930                 return(0);
1931         }
1932
1933         /*
1934          * If the copy flag is set, copy this peripheral out.
1935          */
1936         if (retval & DM_RET_COPY) {
1937                 int spaceleft, j;
1938
1939                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1940                         sizeof(struct dev_match_result));
1941
1942                 /*
1943                  * If we don't have enough space to put in another
1944                  * match result, save our position and tell the
1945                  * user there are more devices to check.
1946                  */
1947                 if (spaceleft < sizeof(struct dev_match_result)) {
1948                         struct periph_driver **pdrv;
1949
1950                         pdrv = NULL;
1951                         bzero(&cdm->pos, sizeof(cdm->pos));
1952                         cdm->pos.position_type =
1953                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1954                                 CAM_DEV_POS_PERIPH;
1955
1956                         /*
1957                          * This may look a bit non-sensical, but it is
1958                          * actually quite logical.  There are very few
1959                          * peripheral drivers, and bloating every peripheral
1960                          * structure with a pointer back to its parent
1961                          * peripheral driver linker set entry would cost
1962                          * more in the long run than doing this quick lookup.
1963                          */
1964                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1965                                 if (strcmp((*pdrv)->driver_name,
1966                                     periph->periph_name) == 0)
1967                                         break;
1968                         }
1969
1970                         if (*pdrv == NULL) {
1971                                 cdm->status = CAM_DEV_MATCH_ERROR;
1972                                 return(0);
1973                         }
1974
1975                         cdm->pos.cookie.pdrv = pdrv;
1976                         /*
1977                          * The periph generation slot does double duty, as
1978                          * does the periph pointer slot.  They are used for
1979                          * both edt and pdrv lookups and positioning.
1980                          */
1981                         cdm->pos.cookie.periph = periph;
1982                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1983                                 (*pdrv)->generation;
1984                         cdm->status = CAM_DEV_MATCH_MORE;
1985                         return(0);
1986                 }
1987
1988                 j = cdm->num_matches;
1989                 cdm->num_matches++;
1990                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1991                 cdm->matches[j].result.periph_result.path_id =
1992                         periph->path->bus->path_id;
1993
1994                 /*
1995                  * The transport layer peripheral doesn't have a target or
1996                  * lun.
1997                  */
1998                 if (periph->path->target)
1999                         cdm->matches[j].result.periph_result.target_id =
2000                                 periph->path->target->target_id;
2001                 else
2002                         cdm->matches[j].result.periph_result.target_id =
2003                                 CAM_TARGET_WILDCARD;
2004
2005                 if (periph->path->device)
2006                         cdm->matches[j].result.periph_result.target_lun =
2007                                 periph->path->device->lun_id;
2008                 else
2009                         cdm->matches[j].result.periph_result.target_lun =
2010                                 CAM_LUN_WILDCARD;
2011
2012                 cdm->matches[j].result.periph_result.unit_number =
2013                         periph->unit_number;
2014                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2015                         periph->periph_name, DEV_IDLEN);
2016         }
2017
2018         return(1);
2019 }
2020
2021 static int
2022 xptperiphlistmatch(struct ccb_dev_match *cdm)
2023 {
2024         int ret;
2025
2026         cdm->num_matches = 0;
2027
2028         /*
2029          * At this point in the edt traversal function, we check the bus
2030          * list generation to make sure that no busses have been added or
2031          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2032          * For the peripheral driver list traversal function, however, we
2033          * don't have to worry about new peripheral driver types coming or
2034          * going; they're in a linker set, and therefore can't change
2035          * without a recompile.
2036          */
2037
2038         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2039          && (cdm->pos.cookie.pdrv != NULL))
2040                 ret = xptpdrvtraverse(
2041                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2042                                 xptplistpdrvfunc, cdm);
2043         else
2044                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2045
2046         /*
2047          * If we get back 0, that means that we had to stop before fully
2048          * traversing the peripheral driver tree.  It also means that one of
2049          * the subroutines has set the status field to the proper value.  If
2050          * we get back 1, we've fully traversed the EDT and copied out any
2051          * matching entries.
2052          */
2053         if (ret == 1)
2054                 cdm->status = CAM_DEV_MATCH_LAST;
2055
2056         return(ret);
2057 }
2058
2059 static int
2060 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2061 {
2062         struct cam_eb *bus, *next_bus;
2063         int retval;
2064
2065         retval = 1;
2066         if (start_bus)
2067                 bus = start_bus;
2068         else {
2069                 xpt_lock_buses();
2070                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2071                 if (bus == NULL) {
2072                         xpt_unlock_buses();
2073                         return (retval);
2074                 }
2075                 bus->refcount++;
2076                 xpt_unlock_buses();
2077         }
2078         for (; bus != NULL; bus = next_bus) {
2079                 retval = tr_func(bus, arg);
2080                 if (retval == 0) {
2081                         xpt_release_bus(bus);
2082                         break;
2083                 }
2084                 xpt_lock_buses();
2085                 next_bus = TAILQ_NEXT(bus, links);
2086                 if (next_bus)
2087                         next_bus->refcount++;
2088                 xpt_unlock_buses();
2089                 xpt_release_bus(bus);
2090         }
2091         return(retval);
2092 }
2093
2094 static int
2095 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2096                   xpt_targetfunc_t *tr_func, void *arg)
2097 {
2098         struct cam_et *target, *next_target;
2099         int retval;
2100
2101         retval = 1;
2102         if (start_target)
2103                 target = start_target;
2104         else {
2105                 mtx_lock(&bus->eb_mtx);
2106                 target = TAILQ_FIRST(&bus->et_entries);
2107                 if (target == NULL) {
2108                         mtx_unlock(&bus->eb_mtx);
2109                         return (retval);
2110                 }
2111                 target->refcount++;
2112                 mtx_unlock(&bus->eb_mtx);
2113         }
2114         for (; target != NULL; target = next_target) {
2115                 retval = tr_func(target, arg);
2116                 if (retval == 0) {
2117                         xpt_release_target(target);
2118                         break;
2119                 }
2120                 mtx_lock(&bus->eb_mtx);
2121                 next_target = TAILQ_NEXT(target, links);
2122                 if (next_target)
2123                         next_target->refcount++;
2124                 mtx_unlock(&bus->eb_mtx);
2125                 xpt_release_target(target);
2126         }
2127         return(retval);
2128 }
2129
2130 static int
2131 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2132                   xpt_devicefunc_t *tr_func, void *arg)
2133 {
2134         struct cam_eb *bus;
2135         struct cam_ed *device, *next_device;
2136         int retval;
2137
2138         retval = 1;
2139         bus = target->bus;
2140         if (start_device)
2141                 device = start_device;
2142         else {
2143                 mtx_lock(&bus->eb_mtx);
2144                 device = TAILQ_FIRST(&target->ed_entries);
2145                 if (device == NULL) {
2146                         mtx_unlock(&bus->eb_mtx);
2147                         return (retval);
2148                 }
2149                 device->refcount++;
2150                 mtx_unlock(&bus->eb_mtx);
2151         }
2152         for (; device != NULL; device = next_device) {
2153                 mtx_lock(&device->device_mtx);
2154                 retval = tr_func(device, arg);
2155                 mtx_unlock(&device->device_mtx);
2156                 if (retval == 0) {
2157                         xpt_release_device(device);
2158                         break;
2159                 }
2160                 mtx_lock(&bus->eb_mtx);
2161                 next_device = TAILQ_NEXT(device, links);
2162                 if (next_device)
2163                         next_device->refcount++;
2164                 mtx_unlock(&bus->eb_mtx);
2165                 xpt_release_device(device);
2166         }
2167         return(retval);
2168 }
2169
2170 static int
2171 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2172                   xpt_periphfunc_t *tr_func, void *arg)
2173 {
2174         struct cam_eb *bus;
2175         struct cam_periph *periph, *next_periph;
2176         int retval;
2177
2178         retval = 1;
2179
2180         bus = device->target->bus;
2181         if (start_periph)
2182                 periph = start_periph;
2183         else {
2184                 xpt_lock_buses();
2185                 mtx_lock(&bus->eb_mtx);
2186                 periph = SLIST_FIRST(&device->periphs);
2187                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2188                         periph = SLIST_NEXT(periph, periph_links);
2189                 if (periph == NULL) {
2190                         mtx_unlock(&bus->eb_mtx);
2191                         xpt_unlock_buses();
2192                         return (retval);
2193                 }
2194                 periph->refcount++;
2195                 mtx_unlock(&bus->eb_mtx);
2196                 xpt_unlock_buses();
2197         }
2198         for (; periph != NULL; periph = next_periph) {
2199                 retval = tr_func(periph, arg);
2200                 if (retval == 0) {
2201                         cam_periph_release_locked(periph);
2202                         break;
2203                 }
2204                 xpt_lock_buses();
2205                 mtx_lock(&bus->eb_mtx);
2206                 next_periph = SLIST_NEXT(periph, periph_links);
2207                 while (next_periph != NULL &&
2208                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2209                         next_periph = SLIST_NEXT(next_periph, periph_links);
2210                 if (next_periph)
2211                         next_periph->refcount++;
2212                 mtx_unlock(&bus->eb_mtx);
2213                 xpt_unlock_buses();
2214                 cam_periph_release_locked(periph);
2215         }
2216         return(retval);
2217 }
2218
2219 static int
2220 xptpdrvtraverse(struct periph_driver **start_pdrv,
2221                 xpt_pdrvfunc_t *tr_func, void *arg)
2222 {
2223         struct periph_driver **pdrv;
2224         int retval;
2225
2226         retval = 1;
2227
2228         /*
2229          * We don't traverse the peripheral driver list like we do the
2230          * other lists, because it is a linker set, and therefore cannot be
2231          * changed during runtime.  If the peripheral driver list is ever
2232          * re-done to be something other than a linker set (i.e. it can
2233          * change while the system is running), the list traversal should
2234          * be modified to work like the other traversal functions.
2235          */
2236         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2237              *pdrv != NULL; pdrv++) {
2238                 retval = tr_func(pdrv, arg);
2239
2240                 if (retval == 0)
2241                         return(retval);
2242         }
2243
2244         return(retval);
2245 }
2246
2247 static int
2248 xptpdperiphtraverse(struct periph_driver **pdrv,
2249                     struct cam_periph *start_periph,
2250                     xpt_periphfunc_t *tr_func, void *arg)
2251 {
2252         struct cam_periph *periph, *next_periph;
2253         int retval;
2254
2255         retval = 1;
2256
2257         if (start_periph)
2258                 periph = start_periph;
2259         else {
2260                 xpt_lock_buses();
2261                 periph = TAILQ_FIRST(&(*pdrv)->units);
2262                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2263                         periph = TAILQ_NEXT(periph, unit_links);
2264                 if (periph == NULL) {
2265                         xpt_unlock_buses();
2266                         return (retval);
2267                 }
2268                 periph->refcount++;
2269                 xpt_unlock_buses();
2270         }
2271         for (; periph != NULL; periph = next_periph) {
2272                 cam_periph_lock(periph);
2273                 retval = tr_func(periph, arg);
2274                 cam_periph_unlock(periph);
2275                 if (retval == 0) {
2276                         cam_periph_release(periph);
2277                         break;
2278                 }
2279                 xpt_lock_buses();
2280                 next_periph = TAILQ_NEXT(periph, unit_links);
2281                 while (next_periph != NULL &&
2282                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2283                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2284                 if (next_periph)
2285                         next_periph->refcount++;
2286                 xpt_unlock_buses();
2287                 cam_periph_release(periph);
2288         }
2289         return(retval);
2290 }
2291
2292 static int
2293 xptdefbusfunc(struct cam_eb *bus, void *arg)
2294 {
2295         struct xpt_traverse_config *tr_config;
2296
2297         tr_config = (struct xpt_traverse_config *)arg;
2298
2299         if (tr_config->depth == XPT_DEPTH_BUS) {
2300                 xpt_busfunc_t *tr_func;
2301
2302                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2303
2304                 return(tr_func(bus, tr_config->tr_arg));
2305         } else
2306                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2307 }
2308
2309 static int
2310 xptdeftargetfunc(struct cam_et *target, void *arg)
2311 {
2312         struct xpt_traverse_config *tr_config;
2313
2314         tr_config = (struct xpt_traverse_config *)arg;
2315
2316         if (tr_config->depth == XPT_DEPTH_TARGET) {
2317                 xpt_targetfunc_t *tr_func;
2318
2319                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2320
2321                 return(tr_func(target, tr_config->tr_arg));
2322         } else
2323                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2324 }
2325
2326 static int
2327 xptdefdevicefunc(struct cam_ed *device, void *arg)
2328 {
2329         struct xpt_traverse_config *tr_config;
2330
2331         tr_config = (struct xpt_traverse_config *)arg;
2332
2333         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2334                 xpt_devicefunc_t *tr_func;
2335
2336                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2337
2338                 return(tr_func(device, tr_config->tr_arg));
2339         } else
2340                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2341 }
2342
2343 static int
2344 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2345 {
2346         struct xpt_traverse_config *tr_config;
2347         xpt_periphfunc_t *tr_func;
2348
2349         tr_config = (struct xpt_traverse_config *)arg;
2350
2351         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2352
2353         /*
2354          * Unlike the other default functions, we don't check for depth
2355          * here.  The peripheral driver level is the last level in the EDT,
2356          * so if we're here, we should execute the function in question.
2357          */
2358         return(tr_func(periph, tr_config->tr_arg));
2359 }
2360
2361 /*
2362  * Execute the given function for every bus in the EDT.
2363  */
2364 static int
2365 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2366 {
2367         struct xpt_traverse_config tr_config;
2368
2369         tr_config.depth = XPT_DEPTH_BUS;
2370         tr_config.tr_func = tr_func;
2371         tr_config.tr_arg = arg;
2372
2373         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2374 }
2375
2376 /*
2377  * Execute the given function for every device in the EDT.
2378  */
2379 static int
2380 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2381 {
2382         struct xpt_traverse_config tr_config;
2383
2384         tr_config.depth = XPT_DEPTH_DEVICE;
2385         tr_config.tr_func = tr_func;
2386         tr_config.tr_arg = arg;
2387
2388         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2389 }
2390
2391 static int
2392 xptsetasyncfunc(struct cam_ed *device, void *arg)
2393 {
2394         struct cam_path path;
2395         struct ccb_getdev cgd;
2396         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2397
2398         /*
2399          * Don't report unconfigured devices (Wildcard devs,
2400          * devices only for target mode, device instances
2401          * that have been invalidated but are waiting for
2402          * their last reference count to be released).
2403          */
2404         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2405                 return (1);
2406
2407         xpt_compile_path(&path,
2408                          NULL,
2409                          device->target->bus->path_id,
2410                          device->target->target_id,
2411                          device->lun_id);
2412         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2413         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2414         xpt_action((union ccb *)&cgd);
2415         csa->callback(csa->callback_arg,
2416                             AC_FOUND_DEVICE,
2417                             &path, &cgd);
2418         xpt_release_path(&path);
2419
2420         return(1);
2421 }
2422
2423 static int
2424 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2425 {
2426         struct cam_path path;
2427         struct ccb_pathinq cpi;
2428         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2429
2430         xpt_compile_path(&path, /*periph*/NULL,
2431                          bus->path_id,
2432                          CAM_TARGET_WILDCARD,
2433                          CAM_LUN_WILDCARD);
2434         xpt_path_lock(&path);
2435         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2436         cpi.ccb_h.func_code = XPT_PATH_INQ;
2437         xpt_action((union ccb *)&cpi);
2438         csa->callback(csa->callback_arg,
2439                             AC_PATH_REGISTERED,
2440                             &path, &cpi);
2441         xpt_path_unlock(&path);
2442         xpt_release_path(&path);
2443
2444         return(1);
2445 }
2446
2447 void
2448 xpt_action(union ccb *start_ccb)
2449 {
2450
2451         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2452
2453         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2454         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2455 }
2456
2457 void
2458 xpt_action_default(union ccb *start_ccb)
2459 {
2460         struct cam_path *path;
2461         struct cam_sim *sim;
2462         int lock;
2463
2464         path = start_ccb->ccb_h.path;
2465         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2466
2467         switch (start_ccb->ccb_h.func_code) {
2468         case XPT_SCSI_IO:
2469         {
2470                 struct cam_ed *device;
2471
2472                 /*
2473                  * For the sake of compatibility with SCSI-1
2474                  * devices that may not understand the identify
2475                  * message, we include lun information in the
2476                  * second byte of all commands.  SCSI-1 specifies
2477                  * that luns are a 3 bit value and reserves only 3
2478                  * bits for lun information in the CDB.  Later
2479                  * revisions of the SCSI spec allow for more than 8
2480                  * luns, but have deprecated lun information in the
2481                  * CDB.  So, if the lun won't fit, we must omit.
2482                  *
2483                  * Also be aware that during initial probing for devices,
2484                  * the inquiry information is unknown but initialized to 0.
2485                  * This means that this code will be exercised while probing
2486                  * devices with an ANSI revision greater than 2.
2487                  */
2488                 device = path->device;
2489                 if (device->protocol_version <= SCSI_REV_2
2490                  && start_ccb->ccb_h.target_lun < 8
2491                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2492
2493                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2494                             start_ccb->ccb_h.target_lun << 5;
2495                 }
2496                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2497         }
2498         /* FALLTHROUGH */
2499         case XPT_TARGET_IO:
2500         case XPT_CONT_TARGET_IO:
2501                 start_ccb->csio.sense_resid = 0;
2502                 start_ccb->csio.resid = 0;
2503                 /* FALLTHROUGH */
2504         case XPT_ATA_IO:
2505                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2506                         start_ccb->ataio.resid = 0;
2507                 /* FALLTHROUGH */
2508         case XPT_RESET_DEV:
2509         case XPT_ENG_EXEC:
2510         case XPT_SMP_IO:
2511         {
2512                 struct cam_devq *devq;
2513
2514                 devq = path->bus->sim->devq;
2515                 mtx_lock(&devq->send_mtx);
2516                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2517                 if (xpt_schedule_devq(devq, path->device) != 0)
2518                         xpt_run_devq(devq);
2519                 mtx_unlock(&devq->send_mtx);
2520                 break;
2521         }
2522         case XPT_CALC_GEOMETRY:
2523                 /* Filter out garbage */
2524                 if (start_ccb->ccg.block_size == 0
2525                  || start_ccb->ccg.volume_size == 0) {
2526                         start_ccb->ccg.cylinders = 0;
2527                         start_ccb->ccg.heads = 0;
2528                         start_ccb->ccg.secs_per_track = 0;
2529                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2530                         break;
2531                 }
2532 #if defined(PC98) || defined(__sparc64__)
2533                 /*
2534                  * In a PC-98 system, geometry translation depens on
2535                  * the "real" device geometry obtained from mode page 4.
2536                  * SCSI geometry translation is performed in the
2537                  * initialization routine of the SCSI BIOS and the result
2538                  * stored in host memory.  If the translation is available
2539                  * in host memory, use it.  If not, rely on the default
2540                  * translation the device driver performs.
2541                  * For sparc64, we may need adjust the geometry of large
2542                  * disks in order to fit the limitations of the 16-bit
2543                  * fields of the VTOC8 disk label.
2544                  */
2545                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2546                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2547                         break;
2548                 }
2549 #endif
2550                 goto call_sim;
2551         case XPT_ABORT:
2552         {
2553                 union ccb* abort_ccb;
2554
2555                 abort_ccb = start_ccb->cab.abort_ccb;
2556                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2557
2558                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2559                                 struct cam_ccbq *ccbq;
2560                                 struct cam_ed *device;
2561
2562                                 device = abort_ccb->ccb_h.path->device;
2563                                 ccbq = &device->ccbq;
2564                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2565                                 abort_ccb->ccb_h.status =
2566                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2567                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2568                                 xpt_done(abort_ccb);
2569                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2570                                 break;
2571                         }
2572                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2573                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2574                                 /*
2575                                  * We've caught this ccb en route to
2576                                  * the SIM.  Flag it for abort and the
2577                                  * SIM will do so just before starting
2578                                  * real work on the CCB.
2579                                  */
2580                                 abort_ccb->ccb_h.status =
2581                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2582                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2583                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2584                                 break;
2585                         }
2586                 }
2587                 if (XPT_FC_IS_QUEUED(abort_ccb)
2588                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2589                         /*
2590                          * It's already completed but waiting
2591                          * for our SWI to get to it.
2592                          */
2593                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2594                         break;
2595                 }
2596                 /*
2597                  * If we weren't able to take care of the abort request
2598                  * in the XPT, pass the request down to the SIM for processing.
2599                  */
2600         }
2601         /* FALLTHROUGH */
2602         case XPT_ACCEPT_TARGET_IO:
2603         case XPT_EN_LUN:
2604         case XPT_IMMED_NOTIFY:
2605         case XPT_NOTIFY_ACK:
2606         case XPT_RESET_BUS:
2607         case XPT_IMMEDIATE_NOTIFY:
2608         case XPT_NOTIFY_ACKNOWLEDGE:
2609         case XPT_GET_SIM_KNOB:
2610         case XPT_SET_SIM_KNOB:
2611         case XPT_GET_TRAN_SETTINGS:
2612         case XPT_SET_TRAN_SETTINGS:
2613         case XPT_PATH_INQ:
2614 call_sim:
2615                 sim = path->bus->sim;
2616                 lock = (mtx_owned(sim->mtx) == 0);
2617                 if (lock)
2618                         CAM_SIM_LOCK(sim);
2619                 (*(sim->sim_action))(sim, start_ccb);
2620                 if (lock)
2621                         CAM_SIM_UNLOCK(sim);
2622                 break;
2623         case XPT_PATH_STATS:
2624                 start_ccb->cpis.last_reset = path->bus->last_reset;
2625                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2626                 break;
2627         case XPT_GDEV_TYPE:
2628         {
2629                 struct cam_ed *dev;
2630
2631                 dev = path->device;
2632                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2633                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2634                 } else {
2635                         struct ccb_getdev *cgd;
2636
2637                         cgd = &start_ccb->cgd;
2638                         cgd->protocol = dev->protocol;
2639                         cgd->inq_data = dev->inq_data;
2640                         cgd->ident_data = dev->ident_data;
2641                         cgd->inq_flags = dev->inq_flags;
2642                         cgd->ccb_h.status = CAM_REQ_CMP;
2643                         cgd->serial_num_len = dev->serial_num_len;
2644                         if ((dev->serial_num_len > 0)
2645                          && (dev->serial_num != NULL))
2646                                 bcopy(dev->serial_num, cgd->serial_num,
2647                                       dev->serial_num_len);
2648                 }
2649                 break;
2650         }
2651         case XPT_GDEV_STATS:
2652         {
2653                 struct cam_ed *dev;
2654
2655                 dev = path->device;
2656                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2657                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2658                 } else {
2659                         struct ccb_getdevstats *cgds;
2660                         struct cam_eb *bus;
2661                         struct cam_et *tar;
2662                         struct cam_devq *devq;
2663
2664                         cgds = &start_ccb->cgds;
2665                         bus = path->bus;
2666                         tar = path->target;
2667                         devq = bus->sim->devq;
2668                         mtx_lock(&devq->send_mtx);
2669                         cgds->dev_openings = dev->ccbq.dev_openings;
2670                         cgds->dev_active = dev->ccbq.dev_active;
2671                         cgds->allocated = dev->ccbq.allocated;
2672                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2673                         cgds->held = cgds->allocated - cgds->dev_active -
2674                             cgds->queued;
2675                         cgds->last_reset = tar->last_reset;
2676                         cgds->maxtags = dev->maxtags;
2677                         cgds->mintags = dev->mintags;
2678                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2679                                 cgds->last_reset = bus->last_reset;
2680                         mtx_unlock(&devq->send_mtx);
2681                         cgds->ccb_h.status = CAM_REQ_CMP;
2682                 }
2683                 break;
2684         }
2685         case XPT_GDEVLIST:
2686         {
2687                 struct cam_periph       *nperiph;
2688                 struct periph_list      *periph_head;
2689                 struct ccb_getdevlist   *cgdl;
2690                 u_int                   i;
2691                 struct cam_ed           *device;
2692                 int                     found;
2693
2694
2695                 found = 0;
2696
2697                 /*
2698                  * Don't want anyone mucking with our data.
2699                  */
2700                 device = path->device;
2701                 periph_head = &device->periphs;
2702                 cgdl = &start_ccb->cgdl;
2703
2704                 /*
2705                  * Check and see if the list has changed since the user
2706                  * last requested a list member.  If so, tell them that the
2707                  * list has changed, and therefore they need to start over
2708                  * from the beginning.
2709                  */
2710                 if ((cgdl->index != 0) &&
2711                     (cgdl->generation != device->generation)) {
2712                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2713                         break;
2714                 }
2715
2716                 /*
2717                  * Traverse the list of peripherals and attempt to find
2718                  * the requested peripheral.
2719                  */
2720                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2721                      (nperiph != NULL) && (i <= cgdl->index);
2722                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2723                         if (i == cgdl->index) {
2724                                 strncpy(cgdl->periph_name,
2725                                         nperiph->periph_name,
2726                                         DEV_IDLEN);
2727                                 cgdl->unit_number = nperiph->unit_number;
2728                                 found = 1;
2729                         }
2730                 }
2731                 if (found == 0) {
2732                         cgdl->status = CAM_GDEVLIST_ERROR;
2733                         break;
2734                 }
2735
2736                 if (nperiph == NULL)
2737                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2738                 else
2739                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2740
2741                 cgdl->index++;
2742                 cgdl->generation = device->generation;
2743
2744                 cgdl->ccb_h.status = CAM_REQ_CMP;
2745                 break;
2746         }
2747         case XPT_DEV_MATCH:
2748         {
2749                 dev_pos_type position_type;
2750                 struct ccb_dev_match *cdm;
2751
2752                 cdm = &start_ccb->cdm;
2753
2754                 /*
2755                  * There are two ways of getting at information in the EDT.
2756                  * The first way is via the primary EDT tree.  It starts
2757                  * with a list of busses, then a list of targets on a bus,
2758                  * then devices/luns on a target, and then peripherals on a
2759                  * device/lun.  The "other" way is by the peripheral driver
2760                  * lists.  The peripheral driver lists are organized by
2761                  * peripheral driver.  (obviously)  So it makes sense to
2762                  * use the peripheral driver list if the user is looking
2763                  * for something like "da1", or all "da" devices.  If the
2764                  * user is looking for something on a particular bus/target
2765                  * or lun, it's generally better to go through the EDT tree.
2766                  */
2767
2768                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2769                         position_type = cdm->pos.position_type;
2770                 else {
2771                         u_int i;
2772
2773                         position_type = CAM_DEV_POS_NONE;
2774
2775                         for (i = 0; i < cdm->num_patterns; i++) {
2776                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2777                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2778                                         position_type = CAM_DEV_POS_EDT;
2779                                         break;
2780                                 }
2781                         }
2782
2783                         if (cdm->num_patterns == 0)
2784                                 position_type = CAM_DEV_POS_EDT;
2785                         else if (position_type == CAM_DEV_POS_NONE)
2786                                 position_type = CAM_DEV_POS_PDRV;
2787                 }
2788
2789                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2790                 case CAM_DEV_POS_EDT:
2791                         xptedtmatch(cdm);
2792                         break;
2793                 case CAM_DEV_POS_PDRV:
2794                         xptperiphlistmatch(cdm);
2795                         break;
2796                 default:
2797                         cdm->status = CAM_DEV_MATCH_ERROR;
2798                         break;
2799                 }
2800
2801                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2802                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2803                 else
2804                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2805
2806                 break;
2807         }
2808         case XPT_SASYNC_CB:
2809         {
2810                 struct ccb_setasync *csa;
2811                 struct async_node *cur_entry;
2812                 struct async_list *async_head;
2813                 u_int32_t added;
2814
2815                 csa = &start_ccb->csa;
2816                 added = csa->event_enable;
2817                 async_head = &path->device->asyncs;
2818
2819                 /*
2820                  * If there is already an entry for us, simply
2821                  * update it.
2822                  */
2823                 cur_entry = SLIST_FIRST(async_head);
2824                 while (cur_entry != NULL) {
2825                         if ((cur_entry->callback_arg == csa->callback_arg)
2826                          && (cur_entry->callback == csa->callback))
2827                                 break;
2828                         cur_entry = SLIST_NEXT(cur_entry, links);
2829                 }
2830
2831                 if (cur_entry != NULL) {
2832                         /*
2833                          * If the request has no flags set,
2834                          * remove the entry.
2835                          */
2836                         added &= ~cur_entry->event_enable;
2837                         if (csa->event_enable == 0) {
2838                                 SLIST_REMOVE(async_head, cur_entry,
2839                                              async_node, links);
2840                                 xpt_release_device(path->device);
2841                                 free(cur_entry, M_CAMXPT);
2842                         } else {
2843                                 cur_entry->event_enable = csa->event_enable;
2844                         }
2845                         csa->event_enable = added;
2846                 } else {
2847                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2848                                            M_NOWAIT);
2849                         if (cur_entry == NULL) {
2850                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2851                                 break;
2852                         }
2853                         cur_entry->event_enable = csa->event_enable;
2854                         cur_entry->event_lock =
2855                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2856                         cur_entry->callback_arg = csa->callback_arg;
2857                         cur_entry->callback = csa->callback;
2858                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2859                         xpt_acquire_device(path->device);
2860                 }
2861                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2862                 break;
2863         }
2864         case XPT_REL_SIMQ:
2865         {
2866                 struct ccb_relsim *crs;
2867                 struct cam_ed *dev;
2868
2869                 crs = &start_ccb->crs;
2870                 dev = path->device;
2871                 if (dev == NULL) {
2872
2873                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2874                         break;
2875                 }
2876
2877                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2878
2879                         /* Don't ever go below one opening */
2880                         if (crs->openings > 0) {
2881                                 xpt_dev_ccbq_resize(path, crs->openings);
2882                                 if (bootverbose) {
2883                                         xpt_print(path,
2884                                             "number of openings is now %d\n",
2885                                             crs->openings);
2886                                 }
2887                         }
2888                 }
2889
2890                 mtx_lock(&dev->sim->devq->send_mtx);
2891                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2892
2893                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2894
2895                                 /*
2896                                  * Just extend the old timeout and decrement
2897                                  * the freeze count so that a single timeout
2898                                  * is sufficient for releasing the queue.
2899                                  */
2900                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2901                                 callout_stop(&dev->callout);
2902                         } else {
2903
2904                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2905                         }
2906
2907                         callout_reset_sbt(&dev->callout,
2908                             SBT_1MS * crs->release_timeout, 0,
2909                             xpt_release_devq_timeout, dev, 0);
2910
2911                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2912
2913                 }
2914
2915                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2916
2917                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2918                                 /*
2919                                  * Decrement the freeze count so that a single
2920                                  * completion is still sufficient to unfreeze
2921                                  * the queue.
2922                                  */
2923                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2924                         } else {
2925
2926                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2927                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2928                         }
2929                 }
2930
2931                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2932
2933                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2934                          || (dev->ccbq.dev_active == 0)) {
2935
2936                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2937                         } else {
2938
2939                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2940                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2941                         }
2942                 }
2943                 mtx_unlock(&dev->sim->devq->send_mtx);
2944
2945                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2946                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2947                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2948                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2949                 break;
2950         }
2951         case XPT_DEBUG: {
2952                 struct cam_path *oldpath;
2953
2954                 /* Check that all request bits are supported. */
2955                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2956                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2957                         break;
2958                 }
2959
2960                 cam_dflags = CAM_DEBUG_NONE;
2961                 if (cam_dpath != NULL) {
2962                         oldpath = cam_dpath;
2963                         cam_dpath = NULL;
2964                         xpt_free_path(oldpath);
2965                 }
2966                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2967                         if (xpt_create_path(&cam_dpath, NULL,
2968                                             start_ccb->ccb_h.path_id,
2969                                             start_ccb->ccb_h.target_id,
2970                                             start_ccb->ccb_h.target_lun) !=
2971                                             CAM_REQ_CMP) {
2972                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2973                         } else {
2974                                 cam_dflags = start_ccb->cdbg.flags;
2975                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2976                                 xpt_print(cam_dpath, "debugging flags now %x\n",
2977                                     cam_dflags);
2978                         }
2979                 } else
2980                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2981                 break;
2982         }
2983         case XPT_NOOP:
2984                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2985                         xpt_freeze_devq(path, 1);
2986                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2987                 break;
2988         default:
2989         case XPT_SDEV_TYPE:
2990         case XPT_TERM_IO:
2991         case XPT_ENG_INQ:
2992                 /* XXX Implement */
2993                 printf("%s: CCB type %#x not supported\n", __func__,
2994                        start_ccb->ccb_h.func_code);
2995                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
2996                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
2997                         xpt_done(start_ccb);
2998                 }
2999                 break;
3000         }
3001 }
3002
3003 void
3004 xpt_polled_action(union ccb *start_ccb)
3005 {
3006         u_int32_t timeout;
3007         struct    cam_sim *sim;
3008         struct    cam_devq *devq;
3009         struct    cam_ed *dev;
3010
3011         timeout = start_ccb->ccb_h.timeout * 10;
3012         sim = start_ccb->ccb_h.path->bus->sim;
3013         devq = sim->devq;
3014         dev = start_ccb->ccb_h.path->device;
3015
3016         mtx_unlock(&dev->device_mtx);
3017
3018         /*
3019          * Steal an opening so that no other queued requests
3020          * can get it before us while we simulate interrupts.
3021          */
3022         mtx_lock(&devq->send_mtx);
3023         dev->ccbq.dev_openings--;
3024         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3025             (--timeout > 0)) {
3026                 mtx_unlock(&devq->send_mtx);
3027                 DELAY(100);
3028                 CAM_SIM_LOCK(sim);
3029                 (*(sim->sim_poll))(sim);
3030                 CAM_SIM_UNLOCK(sim);
3031                 camisr_runqueue();
3032                 mtx_lock(&devq->send_mtx);
3033         }
3034         dev->ccbq.dev_openings++;
3035         mtx_unlock(&devq->send_mtx);
3036
3037         if (timeout != 0) {
3038                 xpt_action(start_ccb);
3039                 while(--timeout > 0) {
3040                         CAM_SIM_LOCK(sim);
3041                         (*(sim->sim_poll))(sim);
3042                         CAM_SIM_UNLOCK(sim);
3043                         camisr_runqueue();
3044                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3045                             != CAM_REQ_INPROG)
3046                                 break;
3047                         DELAY(100);
3048                 }
3049                 if (timeout == 0) {
3050                         /*
3051                          * XXX Is it worth adding a sim_timeout entry
3052                          * point so we can attempt recovery?  If
3053                          * this is only used for dumps, I don't think
3054                          * it is.
3055                          */
3056                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3057                 }
3058         } else {
3059                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3060         }
3061
3062         mtx_lock(&dev->device_mtx);
3063 }
3064
3065 /*
3066  * Schedule a peripheral driver to receive a ccb when its
3067  * target device has space for more transactions.
3068  */
3069 void
3070 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3071 {
3072
3073         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3074         cam_periph_assert(periph, MA_OWNED);
3075         if (new_priority < periph->scheduled_priority) {
3076                 periph->scheduled_priority = new_priority;
3077                 xpt_run_allocq(periph, 0);
3078         }
3079 }
3080
3081
3082 /*
3083  * Schedule a device to run on a given queue.
3084  * If the device was inserted as a new entry on the queue,
3085  * return 1 meaning the device queue should be run. If we
3086  * were already queued, implying someone else has already
3087  * started the queue, return 0 so the caller doesn't attempt
3088  * to run the queue.
3089  */
3090 static int
3091 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3092                  u_int32_t new_priority)
3093 {
3094         int retval;
3095         u_int32_t old_priority;
3096
3097         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3098
3099         old_priority = pinfo->priority;
3100
3101         /*
3102          * Are we already queued?
3103          */
3104         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3105                 /* Simply reorder based on new priority */
3106                 if (new_priority < old_priority) {
3107                         camq_change_priority(queue, pinfo->index,
3108                                              new_priority);
3109                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3110                                         ("changed priority to %d\n",
3111                                          new_priority));
3112                         retval = 1;
3113                 } else
3114                         retval = 0;
3115         } else {
3116                 /* New entry on the queue */
3117                 if (new_priority < old_priority)
3118                         pinfo->priority = new_priority;
3119
3120                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3121                                 ("Inserting onto queue\n"));
3122                 pinfo->generation = ++queue->generation;
3123                 camq_insert(queue, pinfo);
3124                 retval = 1;
3125         }
3126         return (retval);
3127 }
3128
3129 static void
3130 xpt_run_allocq_task(void *context, int pending)
3131 {
3132         struct cam_periph *periph = context;
3133
3134         cam_periph_lock(periph);
3135         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3136         xpt_run_allocq(periph, 1);
3137         cam_periph_unlock(periph);
3138         cam_periph_release(periph);
3139 }
3140
3141 static void
3142 xpt_run_allocq(struct cam_periph *periph, int sleep)
3143 {
3144         struct cam_ed   *device;
3145         union ccb       *ccb;
3146         uint32_t         prio;
3147
3148         cam_periph_assert(periph, MA_OWNED);
3149         if (periph->periph_allocating)
3150                 return;
3151         periph->periph_allocating = 1;
3152         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3153         device = periph->path->device;
3154         ccb = NULL;
3155 restart:
3156         while ((prio = min(periph->scheduled_priority,
3157             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3158             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3159              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3160
3161                 if (ccb == NULL &&
3162                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3163                         if (sleep) {
3164                                 ccb = xpt_get_ccb(periph);
3165                                 goto restart;
3166                         }
3167                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3168                                 break;
3169                         cam_periph_doacquire(periph);
3170                         periph->flags |= CAM_PERIPH_RUN_TASK;
3171                         taskqueue_enqueue(xsoftc.xpt_taskq,
3172                             &periph->periph_run_task);
3173                         break;
3174                 }
3175                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3176                 if (prio == periph->immediate_priority) {
3177                         periph->immediate_priority = CAM_PRIORITY_NONE;
3178                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3179                                         ("waking cam_periph_getccb()\n"));
3180                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3181                                           periph_links.sle);
3182                         wakeup(&periph->ccb_list);
3183                 } else {
3184                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3185                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3186                                         ("calling periph_start()\n"));
3187                         periph->periph_start(periph, ccb);
3188                 }
3189                 ccb = NULL;
3190         }
3191         if (ccb != NULL)
3192                 xpt_release_ccb(ccb);
3193         periph->periph_allocating = 0;
3194 }
3195
3196 static void
3197 xpt_run_devq(struct cam_devq *devq)
3198 {
3199         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3200         int lock;
3201
3202         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3203
3204         devq->send_queue.qfrozen_cnt++;
3205         while ((devq->send_queue.entries > 0)
3206             && (devq->send_openings > 0)
3207             && (devq->send_queue.qfrozen_cnt <= 1)) {
3208                 struct  cam_ed *device;
3209                 union ccb *work_ccb;
3210                 struct  cam_sim *sim;
3211
3212                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3213                                                            CAMQ_HEAD);
3214                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3215                                 ("running device %p\n", device));
3216
3217                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3218                 if (work_ccb == NULL) {
3219                         printf("device on run queue with no ccbs???\n");
3220                         continue;
3221                 }
3222
3223                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3224
3225                         mtx_lock(&xsoftc.xpt_highpower_lock);
3226                         if (xsoftc.num_highpower <= 0) {
3227                                 /*
3228                                  * We got a high power command, but we
3229                                  * don't have any available slots.  Freeze
3230                                  * the device queue until we have a slot
3231                                  * available.
3232                                  */
3233                                 xpt_freeze_devq_device(device, 1);
3234                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3235                                                    highpowerq_entry);
3236
3237                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3238                                 continue;
3239                         } else {
3240                                 /*
3241                                  * Consume a high power slot while
3242                                  * this ccb runs.
3243                                  */
3244                                 xsoftc.num_highpower--;
3245                         }
3246                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3247                 }
3248                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3249                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3250                 devq->send_openings--;
3251                 devq->send_active++;
3252                 xpt_schedule_devq(devq, device);
3253                 mtx_unlock(&devq->send_mtx);
3254
3255                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3256                         /*
3257                          * The client wants to freeze the queue
3258                          * after this CCB is sent.
3259                          */
3260                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3261                 }
3262
3263                 /* In Target mode, the peripheral driver knows best... */
3264                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3265                         if ((device->inq_flags & SID_CmdQue) != 0
3266                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3267                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3268                         else
3269                                 /*
3270                                  * Clear this in case of a retried CCB that
3271                                  * failed due to a rejected tag.
3272                                  */
3273                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3274                 }
3275
3276                 switch (work_ccb->ccb_h.func_code) {
3277                 case XPT_SCSI_IO:
3278                         CAM_DEBUG(work_ccb->ccb_h.path,
3279                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3280                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3281                                           &device->inq_data),
3282                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3283                                              cdb_str, sizeof(cdb_str))));
3284                         break;
3285                 case XPT_ATA_IO:
3286                         CAM_DEBUG(work_ccb->ccb_h.path,
3287                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3288                              ata_op_string(&work_ccb->ataio.cmd),
3289                              ata_cmd_string(&work_ccb->ataio.cmd,
3290                                             cdb_str, sizeof(cdb_str))));
3291                         break;
3292                 default:
3293                         break;
3294                 }
3295
3296                 /*
3297                  * Device queues can be shared among multiple SIM instances
3298                  * that reside on different busses.  Use the SIM from the
3299                  * queued device, rather than the one from the calling bus.
3300                  */
3301                 sim = device->sim;
3302                 lock = (mtx_owned(sim->mtx) == 0);
3303                 if (lock)
3304                         CAM_SIM_LOCK(sim);
3305                 (*(sim->sim_action))(sim, work_ccb);
3306                 if (lock)
3307                         CAM_SIM_UNLOCK(sim);
3308                 mtx_lock(&devq->send_mtx);
3309         }
3310         devq->send_queue.qfrozen_cnt--;
3311 }
3312
3313 /*
3314  * This function merges stuff from the slave ccb into the master ccb, while
3315  * keeping important fields in the master ccb constant.
3316  */
3317 void
3318 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3319 {
3320
3321         /*
3322          * Pull fields that are valid for peripheral drivers to set
3323          * into the master CCB along with the CCB "payload".
3324          */
3325         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3326         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3327         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3328         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3329         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3330               sizeof(union ccb) - sizeof(struct ccb_hdr));
3331 }
3332
3333 void
3334 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3335 {
3336
3337         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3338         ccb_h->pinfo.priority = priority;
3339         ccb_h->path = path;
3340         ccb_h->path_id = path->bus->path_id;
3341         if (path->target)
3342                 ccb_h->target_id = path->target->target_id;
3343         else
3344                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3345         if (path->device) {
3346                 ccb_h->target_lun = path->device->lun_id;
3347                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3348         } else {
3349                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3350         }
3351         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3352         ccb_h->flags = 0;
3353         ccb_h->xflags = 0;
3354 }
3355
3356 /* Path manipulation functions */
3357 cam_status
3358 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3359                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3360 {
3361         struct     cam_path *path;
3362         cam_status status;
3363
3364         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3365
3366         if (path == NULL) {
3367                 status = CAM_RESRC_UNAVAIL;
3368                 return(status);
3369         }
3370         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3371         if (status != CAM_REQ_CMP) {
3372                 free(path, M_CAMPATH);
3373                 path = NULL;
3374         }
3375         *new_path_ptr = path;
3376         return (status);
3377 }
3378
3379 cam_status
3380 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3381                          struct cam_periph *periph, path_id_t path_id,
3382                          target_id_t target_id, lun_id_t lun_id)
3383 {
3384
3385         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3386             lun_id));
3387 }
3388
3389 cam_status
3390 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3391                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3392 {
3393         struct       cam_eb *bus;
3394         struct       cam_et *target;
3395         struct       cam_ed *device;
3396         cam_status   status;
3397
3398         status = CAM_REQ_CMP;   /* Completed without error */
3399         target = NULL;          /* Wildcarded */
3400         device = NULL;          /* Wildcarded */
3401
3402         /*
3403          * We will potentially modify the EDT, so block interrupts
3404          * that may attempt to create cam paths.
3405          */
3406         bus = xpt_find_bus(path_id);
3407         if (bus == NULL) {
3408                 status = CAM_PATH_INVALID;
3409         } else {
3410                 xpt_lock_buses();
3411                 mtx_lock(&bus->eb_mtx);
3412                 target = xpt_find_target(bus, target_id);
3413                 if (target == NULL) {
3414                         /* Create one */
3415                         struct cam_et *new_target;
3416
3417                         new_target = xpt_alloc_target(bus, target_id);
3418                         if (new_target == NULL) {
3419                                 status = CAM_RESRC_UNAVAIL;
3420                         } else {
3421                                 target = new_target;
3422                         }
3423                 }
3424                 xpt_unlock_buses();
3425                 if (target != NULL) {
3426                         device = xpt_find_device(target, lun_id);
3427                         if (device == NULL) {
3428                                 /* Create one */
3429                                 struct cam_ed *new_device;
3430
3431                                 new_device =
3432                                     (*(bus->xport->alloc_device))(bus,
3433                                                                       target,
3434                                                                       lun_id);
3435                                 if (new_device == NULL) {
3436                                         status = CAM_RESRC_UNAVAIL;
3437                                 } else {
3438                                         device = new_device;
3439                                 }
3440                         }
3441                 }
3442                 mtx_unlock(&bus->eb_mtx);
3443         }
3444
3445         /*
3446          * Only touch the user's data if we are successful.
3447          */
3448         if (status == CAM_REQ_CMP) {
3449                 new_path->periph = perph;
3450                 new_path->bus = bus;
3451                 new_path->target = target;
3452                 new_path->device = device;
3453                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3454         } else {
3455                 if (device != NULL)
3456                         xpt_release_device(device);
3457                 if (target != NULL)
3458                         xpt_release_target(target);
3459                 if (bus != NULL)
3460                         xpt_release_bus(bus);
3461         }
3462         return (status);
3463 }
3464
3465 cam_status
3466 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3467 {
3468         struct     cam_path *new_path;
3469
3470         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3471         if (new_path == NULL)
3472                 return(CAM_RESRC_UNAVAIL);
3473         xpt_copy_path(new_path, path);
3474         *new_path_ptr = new_path;
3475         return (CAM_REQ_CMP);
3476 }
3477
3478 void
3479 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3480 {
3481
3482         *new_path = *path;
3483         if (path->bus != NULL)
3484                 xpt_acquire_bus(path->bus);
3485         if (path->target != NULL)
3486                 xpt_acquire_target(path->target);
3487         if (path->device != NULL)
3488                 xpt_acquire_device(path->device);
3489 }
3490
3491 void
3492 xpt_release_path(struct cam_path *path)
3493 {
3494         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3495         if (path->device != NULL) {
3496                 xpt_release_device(path->device);
3497                 path->device = NULL;
3498         }
3499         if (path->target != NULL) {
3500                 xpt_release_target(path->target);
3501                 path->target = NULL;
3502         }
3503         if (path->bus != NULL) {
3504                 xpt_release_bus(path->bus);
3505                 path->bus = NULL;
3506         }
3507 }
3508
3509 void
3510 xpt_free_path(struct cam_path *path)
3511 {
3512
3513         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3514         xpt_release_path(path);
3515         free(path, M_CAMPATH);
3516 }
3517
3518 void
3519 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3520     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3521 {
3522
3523         xpt_lock_buses();
3524         if (bus_ref) {
3525                 if (path->bus)
3526                         *bus_ref = path->bus->refcount;
3527                 else
3528                         *bus_ref = 0;
3529         }
3530         if (periph_ref) {
3531                 if (path->periph)
3532                         *periph_ref = path->periph->refcount;
3533                 else
3534                         *periph_ref = 0;
3535         }
3536         xpt_unlock_buses();
3537         if (target_ref) {
3538                 if (path->target)
3539                         *target_ref = path->target->refcount;
3540                 else
3541                         *target_ref = 0;
3542         }
3543         if (device_ref) {
3544                 if (path->device)
3545                         *device_ref = path->device->refcount;
3546                 else
3547                         *device_ref = 0;
3548         }
3549 }
3550
3551 /*
3552  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3553  * in path1, 2 for match with wildcards in path2.
3554  */
3555 int
3556 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3557 {
3558         int retval = 0;
3559
3560         if (path1->bus != path2->bus) {
3561                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3562                         retval = 1;
3563                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3564                         retval = 2;
3565                 else
3566                         return (-1);
3567         }
3568         if (path1->target != path2->target) {
3569                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3570                         if (retval == 0)
3571                                 retval = 1;
3572                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3573                         retval = 2;
3574                 else
3575                         return (-1);
3576         }
3577         if (path1->device != path2->device) {
3578                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3579                         if (retval == 0)
3580                                 retval = 1;
3581                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3582                         retval = 2;
3583                 else
3584                         return (-1);
3585         }
3586         return (retval);
3587 }
3588
3589 int
3590 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3591 {
3592         int retval = 0;
3593
3594         if (path->bus != dev->target->bus) {
3595                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3596                         retval = 1;
3597                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3598                         retval = 2;
3599                 else
3600                         return (-1);
3601         }
3602         if (path->target != dev->target) {
3603                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3604                         if (retval == 0)
3605                                 retval = 1;
3606                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3607                         retval = 2;
3608                 else
3609                         return (-1);
3610         }
3611         if (path->device != dev) {
3612                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3613                         if (retval == 0)
3614                                 retval = 1;
3615                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3616                         retval = 2;
3617                 else
3618                         return (-1);
3619         }
3620         return (retval);
3621 }
3622
3623 void
3624 xpt_print_path(struct cam_path *path)
3625 {
3626
3627         if (path == NULL)
3628                 printf("(nopath): ");
3629         else {
3630                 if (path->periph != NULL)
3631                         printf("(%s%d:", path->periph->periph_name,
3632                                path->periph->unit_number);
3633                 else
3634                         printf("(noperiph:");
3635
3636                 if (path->bus != NULL)
3637                         printf("%s%d:%d:", path->bus->sim->sim_name,
3638                                path->bus->sim->unit_number,
3639                                path->bus->sim->bus_id);
3640                 else
3641                         printf("nobus:");
3642
3643                 if (path->target != NULL)
3644                         printf("%d:", path->target->target_id);
3645                 else
3646                         printf("X:");
3647
3648                 if (path->device != NULL)
3649                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3650                 else
3651                         printf("X): ");
3652         }
3653 }
3654
3655 void
3656 xpt_print_device(struct cam_ed *device)
3657 {
3658
3659         if (device == NULL)
3660                 printf("(nopath): ");
3661         else {
3662                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3663                        device->sim->unit_number,
3664                        device->sim->bus_id,
3665                        device->target->target_id,
3666                        (uintmax_t)device->lun_id);
3667         }
3668 }
3669
3670 void
3671 xpt_print(struct cam_path *path, const char *fmt, ...)
3672 {
3673         va_list ap;
3674         xpt_print_path(path);
3675         va_start(ap, fmt);
3676         vprintf(fmt, ap);
3677         va_end(ap);
3678 }
3679
3680 int
3681 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3682 {
3683         struct sbuf sb;
3684
3685         sbuf_new(&sb, str, str_len, 0);
3686
3687         if (path == NULL)
3688                 sbuf_printf(&sb, "(nopath): ");
3689         else {
3690                 if (path->periph != NULL)
3691                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3692                                     path->periph->unit_number);
3693                 else
3694                         sbuf_printf(&sb, "(noperiph:");
3695
3696                 if (path->bus != NULL)
3697                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3698                                     path->bus->sim->unit_number,
3699                                     path->bus->sim->bus_id);
3700                 else
3701                         sbuf_printf(&sb, "nobus:");
3702
3703                 if (path->target != NULL)
3704                         sbuf_printf(&sb, "%d:", path->target->target_id);
3705                 else
3706                         sbuf_printf(&sb, "X:");
3707
3708                 if (path->device != NULL)
3709                         sbuf_printf(&sb, "%jx): ",
3710                             (uintmax_t)path->device->lun_id);
3711                 else
3712                         sbuf_printf(&sb, "X): ");
3713         }
3714         sbuf_finish(&sb);
3715
3716         return(sbuf_len(&sb));
3717 }
3718
3719 path_id_t
3720 xpt_path_path_id(struct cam_path *path)
3721 {
3722         return(path->bus->path_id);
3723 }
3724
3725 target_id_t
3726 xpt_path_target_id(struct cam_path *path)
3727 {
3728         if (path->target != NULL)
3729                 return (path->target->target_id);
3730         else
3731                 return (CAM_TARGET_WILDCARD);
3732 }
3733
3734 lun_id_t
3735 xpt_path_lun_id(struct cam_path *path)
3736 {
3737         if (path->device != NULL)
3738                 return (path->device->lun_id);
3739         else
3740                 return (CAM_LUN_WILDCARD);
3741 }
3742
3743 struct cam_sim *
3744 xpt_path_sim(struct cam_path *path)
3745 {
3746
3747         return (path->bus->sim);
3748 }
3749
3750 struct cam_periph*
3751 xpt_path_periph(struct cam_path *path)
3752 {
3753
3754         return (path->periph);
3755 }
3756
3757 int
3758 xpt_path_legacy_ata_id(struct cam_path *path)
3759 {
3760         struct cam_eb *bus;
3761         int bus_id;
3762
3763         if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3764             strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3765             strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3766             strcmp(path->bus->sim->sim_name, "siisch") != 0)
3767                 return (-1);
3768
3769         if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3770             path->bus->sim->unit_number < 2) {
3771                 bus_id = path->bus->sim->unit_number;
3772         } else {
3773                 bus_id = 2;
3774                 xpt_lock_buses();
3775                 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3776                         if (bus == path->bus)
3777                                 break;
3778                         if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3779                              bus->sim->unit_number >= 2) ||
3780                             strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3781                             strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3782                             strcmp(bus->sim->sim_name, "siisch") == 0)
3783                                 bus_id++;
3784                 }
3785                 xpt_unlock_buses();
3786         }
3787         if (path->target != NULL) {
3788                 if (path->target->target_id < 2)
3789                         return (bus_id * 2 + path->target->target_id);
3790                 else
3791                         return (-1);
3792         } else
3793                 return (bus_id * 2);
3794 }
3795
3796 /*
3797  * Release a CAM control block for the caller.  Remit the cost of the structure
3798  * to the device referenced by the path.  If the this device had no 'credits'
3799  * and peripheral drivers have registered async callbacks for this notification
3800  * call them now.
3801  */
3802 void
3803 xpt_release_ccb(union ccb *free_ccb)
3804 {
3805         struct   cam_ed *device;
3806         struct   cam_periph *periph;
3807
3808         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3809         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3810         device = free_ccb->ccb_h.path->device;
3811         periph = free_ccb->ccb_h.path->periph;
3812
3813         xpt_free_ccb(free_ccb);
3814         periph->periph_allocated--;
3815         cam_ccbq_release_opening(&device->ccbq);
3816         xpt_run_allocq(periph, 0);
3817 }
3818
3819 /* Functions accessed by SIM drivers */
3820
3821 static struct xpt_xport xport_default = {
3822         .alloc_device = xpt_alloc_device_default,
3823         .action = xpt_action_default,
3824         .async = xpt_dev_async_default,
3825 };
3826
3827 /*
3828  * A sim structure, listing the SIM entry points and instance
3829  * identification info is passed to xpt_bus_register to hook the SIM
3830  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3831  * for this new bus and places it in the array of busses and assigns
3832  * it a path_id.  The path_id may be influenced by "hard wiring"
3833  * information specified by the user.  Once interrupt services are
3834  * available, the bus will be probed.
3835  */
3836 int32_t
3837 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3838 {
3839         struct cam_eb *new_bus;
3840         struct cam_eb *old_bus;
3841         struct ccb_pathinq cpi;
3842         struct cam_path *path;
3843         cam_status status;
3844
3845         mtx_assert(sim->mtx, MA_OWNED);
3846
3847         sim->bus_id = bus;
3848         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3849                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3850         if (new_bus == NULL) {
3851                 /* Couldn't satisfy request */
3852                 return (CAM_RESRC_UNAVAIL);
3853         }
3854
3855         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3856         TAILQ_INIT(&new_bus->et_entries);
3857         cam_sim_hold(sim);
3858         new_bus->sim = sim;
3859         timevalclear(&new_bus->last_reset);
3860         new_bus->flags = 0;
3861         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3862         new_bus->generation = 0;
3863
3864         xpt_lock_buses();
3865         sim->path_id = new_bus->path_id =
3866             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3867         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3868         while (old_bus != NULL
3869             && old_bus->path_id < new_bus->path_id)
3870                 old_bus = TAILQ_NEXT(old_bus, links);
3871         if (old_bus != NULL)
3872                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3873         else
3874                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3875         xsoftc.bus_generation++;
3876         xpt_unlock_buses();
3877
3878         /*
3879          * Set a default transport so that a PATH_INQ can be issued to
3880          * the SIM.  This will then allow for probing and attaching of
3881          * a more appropriate transport.
3882          */
3883         new_bus->xport = &xport_default;
3884
3885         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3886                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3887         if (status != CAM_REQ_CMP) {
3888                 xpt_release_bus(new_bus);
3889                 free(path, M_CAMXPT);
3890                 return (CAM_RESRC_UNAVAIL);
3891         }
3892
3893         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3894         cpi.ccb_h.func_code = XPT_PATH_INQ;
3895         xpt_action((union ccb *)&cpi);
3896
3897         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3898                 switch (cpi.transport) {
3899                 case XPORT_SPI:
3900                 case XPORT_SAS:
3901                 case XPORT_FC:
3902                 case XPORT_USB:
3903                 case XPORT_ISCSI:
3904                 case XPORT_SRP:
3905                 case XPORT_PPB:
3906                         new_bus->xport = scsi_get_xport();
3907                         break;
3908                 case XPORT_ATA:
3909                 case XPORT_SATA:
3910                         new_bus->xport = ata_get_xport();
3911                         break;
3912                 default:
3913                         new_bus->xport = &xport_default;
3914                         break;
3915                 }
3916         }
3917
3918         /* Notify interested parties */
3919         if (sim->path_id != CAM_XPT_PATH_ID) {
3920
3921                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3922                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3923                         union   ccb *scan_ccb;
3924
3925                         /* Initiate bus rescan. */
3926                         scan_ccb = xpt_alloc_ccb_nowait();
3927                         if (scan_ccb != NULL) {
3928                                 scan_ccb->ccb_h.path = path;
3929                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3930                                 scan_ccb->crcn.flags = 0;
3931                                 xpt_rescan(scan_ccb);
3932                         } else {
3933                                 xpt_print(path,
3934                                           "Can't allocate CCB to scan bus\n");
3935                                 xpt_free_path(path);
3936                         }
3937                 } else
3938                         xpt_free_path(path);
3939         } else
3940                 xpt_free_path(path);
3941         return (CAM_SUCCESS);
3942 }
3943
3944 int32_t
3945 xpt_bus_deregister(path_id_t pathid)
3946 {
3947         struct cam_path bus_path;
3948         cam_status status;
3949
3950         status = xpt_compile_path(&bus_path, NULL, pathid,
3951                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3952         if (status != CAM_REQ_CMP)
3953                 return (status);
3954
3955         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3956         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3957
3958         /* Release the reference count held while registered. */
3959         xpt_release_bus(bus_path.bus);
3960         xpt_release_path(&bus_path);
3961
3962         return (CAM_REQ_CMP);
3963 }
3964
3965 static path_id_t
3966 xptnextfreepathid(void)
3967 {
3968         struct cam_eb *bus;
3969         path_id_t pathid;
3970         const char *strval;
3971
3972         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3973         pathid = 0;
3974         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3975 retry:
3976         /* Find an unoccupied pathid */
3977         while (bus != NULL && bus->path_id <= pathid) {
3978                 if (bus->path_id == pathid)
3979                         pathid++;
3980                 bus = TAILQ_NEXT(bus, links);
3981         }
3982
3983         /*
3984          * Ensure that this pathid is not reserved for
3985          * a bus that may be registered in the future.
3986          */
3987         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3988                 ++pathid;
3989                 /* Start the search over */
3990                 goto retry;
3991         }
3992         return (pathid);
3993 }
3994
3995 static path_id_t
3996 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
3997 {
3998         path_id_t pathid;
3999         int i, dunit, val;
4000         char buf[32];
4001         const char *dname;
4002
4003         pathid = CAM_XPT_PATH_ID;
4004         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4005         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4006                 return (pathid);
4007         i = 0;
4008         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4009                 if (strcmp(dname, "scbus")) {
4010                         /* Avoid a bit of foot shooting. */
4011                         continue;
4012                 }
4013                 if (dunit < 0)          /* unwired?! */
4014                         continue;
4015                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4016                         if (sim_bus == val) {
4017                                 pathid = dunit;
4018                                 break;
4019                         }
4020                 } else if (sim_bus == 0) {
4021                         /* Unspecified matches bus 0 */
4022                         pathid = dunit;
4023                         break;
4024                 } else {
4025                         printf("Ambiguous scbus configuration for %s%d "
4026                                "bus %d, cannot wire down.  The kernel "
4027                                "config entry for scbus%d should "
4028                                "specify a controller bus.\n"
4029                                "Scbus will be assigned dynamically.\n",
4030                                sim_name, sim_unit, sim_bus, dunit);
4031                         break;
4032                 }
4033         }
4034
4035         if (pathid == CAM_XPT_PATH_ID)
4036                 pathid = xptnextfreepathid();
4037         return (pathid);
4038 }
4039
4040 static const char *
4041 xpt_async_string(u_int32_t async_code)
4042 {
4043
4044         switch (async_code) {
4045         case AC_BUS_RESET: return ("AC_BUS_RESET");
4046         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4047         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4048         case AC_SENT_BDR: return ("AC_SENT_BDR");
4049         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4050         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4051         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4052         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4053         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4054         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4055         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4056         case AC_CONTRACT: return ("AC_CONTRACT");
4057         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4058         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4059         }
4060         return ("AC_UNKNOWN");
4061 }
4062
4063 static int
4064 xpt_async_size(u_int32_t async_code)
4065 {
4066
4067         switch (async_code) {
4068         case AC_BUS_RESET: return (0);
4069         case AC_UNSOL_RESEL: return (0);
4070         case AC_SCSI_AEN: return (0);
4071         case AC_SENT_BDR: return (0);
4072         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4073         case AC_PATH_DEREGISTERED: return (0);
4074         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4075         case AC_LOST_DEVICE: return (0);
4076         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4077         case AC_INQ_CHANGED: return (0);
4078         case AC_GETDEV_CHANGED: return (0);
4079         case AC_CONTRACT: return (sizeof(struct ac_contract));
4080         case AC_ADVINFO_CHANGED: return (-1);
4081         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4082         }
4083         return (0);
4084 }
4085
4086 static int
4087 xpt_async_process_dev(struct cam_ed *device, void *arg)
4088 {
4089         union ccb *ccb = arg;
4090         struct cam_path *path = ccb->ccb_h.path;
4091         void *async_arg = ccb->casync.async_arg_ptr;
4092         u_int32_t async_code = ccb->casync.async_code;
4093         int relock;
4094
4095         if (path->device != device
4096          && path->device->lun_id != CAM_LUN_WILDCARD
4097          && device->lun_id != CAM_LUN_WILDCARD)
4098                 return (1);
4099
4100         /*
4101          * The async callback could free the device.
4102          * If it is a broadcast async, it doesn't hold
4103          * device reference, so take our own reference.
4104          */
4105         xpt_acquire_device(device);
4106
4107         /*
4108          * If async for specific device is to be delivered to
4109          * the wildcard client, take the specific device lock.
4110          * XXX: We may need a way for client to specify it.
4111          */
4112         if ((device->lun_id == CAM_LUN_WILDCARD &&
4113              path->device->lun_id != CAM_LUN_WILDCARD) ||
4114             (device->target->target_id == CAM_TARGET_WILDCARD &&
4115              path->target->target_id != CAM_TARGET_WILDCARD) ||
4116             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4117              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4118                 mtx_unlock(&device->device_mtx);
4119                 xpt_path_lock(path);
4120                 relock = 1;
4121         } else
4122                 relock = 0;
4123
4124         (*(device->target->bus->xport->async))(async_code,
4125             device->target->bus, device->target, device, async_arg);
4126         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4127
4128         if (relock) {
4129                 xpt_path_unlock(path);
4130                 mtx_lock(&device->device_mtx);
4131         }
4132         xpt_release_device(device);
4133         return (1);
4134 }
4135
4136 static int
4137 xpt_async_process_tgt(struct cam_et *target, void *arg)
4138 {
4139         union ccb *ccb = arg;
4140         struct cam_path *path = ccb->ccb_h.path;
4141
4142         if (path->target != target
4143          && path->target->target_id != CAM_TARGET_WILDCARD
4144          && target->target_id != CAM_TARGET_WILDCARD)
4145                 return (1);
4146
4147         if (ccb->casync.async_code == AC_SENT_BDR) {
4148                 /* Update our notion of when the last reset occurred */
4149                 microtime(&target->last_reset);
4150         }
4151
4152         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4153 }
4154
4155 static void
4156 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4157 {
4158         struct cam_eb *bus;
4159         struct cam_path *path;
4160         void *async_arg;
4161         u_int32_t async_code;
4162
4163         path = ccb->ccb_h.path;
4164         async_code = ccb->casync.async_code;
4165         async_arg = ccb->casync.async_arg_ptr;
4166         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4167             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4168         bus = path->bus;
4169
4170         if (async_code == AC_BUS_RESET) {
4171                 /* Update our notion of when the last reset occurred */
4172                 microtime(&bus->last_reset);
4173         }
4174
4175         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4176
4177         /*
4178          * If this wasn't a fully wildcarded async, tell all
4179          * clients that want all async events.
4180          */
4181         if (bus != xpt_periph->path->bus) {
4182                 xpt_path_lock(xpt_periph->path);
4183                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4184                 xpt_path_unlock(xpt_periph->path);
4185         }
4186
4187         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4188                 xpt_release_devq(path, 1, TRUE);
4189         else
4190                 xpt_release_simq(path->bus->sim, TRUE);
4191         if (ccb->casync.async_arg_size > 0)
4192                 free(async_arg, M_CAMXPT);
4193         xpt_free_path(path);
4194         xpt_free_ccb(ccb);
4195 }
4196
4197 static void
4198 xpt_async_bcast(struct async_list *async_head,
4199                 u_int32_t async_code,
4200                 struct cam_path *path, void *async_arg)
4201 {
4202         struct async_node *cur_entry;
4203         int lock;
4204
4205         cur_entry = SLIST_FIRST(async_head);
4206         while (cur_entry != NULL) {
4207                 struct async_node *next_entry;
4208                 /*
4209                  * Grab the next list entry before we call the current
4210                  * entry's callback.  This is because the callback function
4211                  * can delete its async callback entry.
4212                  */
4213                 next_entry = SLIST_NEXT(cur_entry, links);
4214                 if ((cur_entry->event_enable & async_code) != 0) {
4215                         lock = cur_entry->event_lock;
4216                         if (lock)
4217                                 CAM_SIM_LOCK(path->device->sim);
4218                         cur_entry->callback(cur_entry->callback_arg,
4219                                             async_code, path,
4220                                             async_arg);
4221                         if (lock)
4222                                 CAM_SIM_UNLOCK(path->device->sim);
4223                 }
4224                 cur_entry = next_entry;
4225         }
4226 }
4227
4228 void
4229 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4230 {
4231         union ccb *ccb;
4232         int size;
4233
4234         ccb = xpt_alloc_ccb_nowait();
4235         if (ccb == NULL) {
4236                 xpt_print(path, "Can't allocate CCB to send %s\n",
4237                     xpt_async_string(async_code));
4238                 return;
4239         }
4240
4241         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4242                 xpt_print(path, "Can't allocate path to send %s\n",
4243                     xpt_async_string(async_code));
4244                 xpt_free_ccb(ccb);
4245                 return;
4246         }
4247         ccb->ccb_h.path->periph = NULL;
4248         ccb->ccb_h.func_code = XPT_ASYNC;
4249         ccb->ccb_h.cbfcnp = xpt_async_process;
4250         ccb->ccb_h.flags |= CAM_UNLOCKED;
4251         ccb->casync.async_code = async_code;
4252         ccb->casync.async_arg_size = 0;
4253         size = xpt_async_size(async_code);
4254         if (size > 0 && async_arg != NULL) {
4255                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4256                 if (ccb->casync.async_arg_ptr == NULL) {
4257                         xpt_print(path, "Can't allocate argument to send %s\n",
4258                             xpt_async_string(async_code));
4259                         xpt_free_path(ccb->ccb_h.path);
4260                         xpt_free_ccb(ccb);
4261                         return;
4262                 }
4263                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4264                 ccb->casync.async_arg_size = size;
4265         } else if (size < 0)
4266                 ccb->casync.async_arg_size = size;
4267         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4268                 xpt_freeze_devq(path, 1);
4269         else
4270                 xpt_freeze_simq(path->bus->sim, 1);
4271         xpt_done(ccb);
4272 }
4273
4274 static void
4275 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4276                       struct cam_et *target, struct cam_ed *device,
4277                       void *async_arg)
4278 {
4279
4280         /*
4281          * We only need to handle events for real devices.
4282          */
4283         if (target->target_id == CAM_TARGET_WILDCARD
4284          || device->lun_id == CAM_LUN_WILDCARD)
4285                 return;
4286
4287         printf("%s called\n", __func__);
4288 }
4289
4290 static uint32_t
4291 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4292 {
4293         struct cam_devq *devq;
4294         uint32_t freeze;
4295
4296         devq = dev->sim->devq;
4297         mtx_assert(&devq->send_mtx, MA_OWNED);
4298         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4299             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4300             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4301         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4302         /* Remove frozen device from sendq. */
4303         if (device_is_queued(dev))
4304                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4305         return (freeze);
4306 }
4307
4308 u_int32_t
4309 xpt_freeze_devq(struct cam_path *path, u_int count)
4310 {
4311         struct cam_ed   *dev = path->device;
4312         struct cam_devq *devq;
4313         uint32_t         freeze;
4314
4315         devq = dev->sim->devq;
4316         mtx_lock(&devq->send_mtx);
4317         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4318         freeze = xpt_freeze_devq_device(dev, count);
4319         mtx_unlock(&devq->send_mtx);
4320         return (freeze);
4321 }
4322
4323 u_int32_t
4324 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4325 {
4326         struct cam_devq *devq;
4327         uint32_t         freeze;
4328
4329         devq = sim->devq;
4330         mtx_lock(&devq->send_mtx);
4331         freeze = (devq->send_queue.qfrozen_cnt += count);
4332         mtx_unlock(&devq->send_mtx);
4333         return (freeze);
4334 }
4335
4336 static void
4337 xpt_release_devq_timeout(void *arg)
4338 {
4339         struct cam_ed *dev;
4340         struct cam_devq *devq;
4341
4342         dev = (struct cam_ed *)arg;
4343         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4344         devq = dev->sim->devq;
4345         mtx_assert(&devq->send_mtx, MA_OWNED);
4346         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4347                 xpt_run_devq(devq);
4348 }
4349
4350 void
4351 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4352 {
4353         struct cam_ed *dev;
4354         struct cam_devq *devq;
4355
4356         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4357             count, run_queue));
4358         dev = path->device;
4359         devq = dev->sim->devq;
4360         mtx_lock(&devq->send_mtx);
4361         if (xpt_release_devq_device(dev, count, run_queue))
4362                 xpt_run_devq(dev->sim->devq);
4363         mtx_unlock(&devq->send_mtx);
4364 }
4365
4366 static int
4367 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4368 {
4369
4370         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4371         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4372             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4373             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4374         if (count > dev->ccbq.queue.qfrozen_cnt) {
4375 #ifdef INVARIANTS
4376                 printf("xpt_release_devq(): requested %u > present %u\n",
4377                     count, dev->ccbq.queue.qfrozen_cnt);
4378 #endif
4379                 count = dev->ccbq.queue.qfrozen_cnt;
4380         }
4381         dev->ccbq.queue.qfrozen_cnt -= count;
4382         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4383                 /*
4384                  * No longer need to wait for a successful
4385                  * command completion.
4386                  */
4387                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4388                 /*
4389                  * Remove any timeouts that might be scheduled
4390                  * to release this queue.
4391                  */
4392                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4393                         callout_stop(&dev->callout);
4394                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4395                 }
4396                 /*
4397                  * Now that we are unfrozen schedule the
4398                  * device so any pending transactions are
4399                  * run.
4400                  */
4401                 xpt_schedule_devq(dev->sim->devq, dev);
4402         } else
4403                 run_queue = 0;
4404         return (run_queue);
4405 }
4406
4407 void
4408 xpt_release_simq(struct cam_sim *sim, int run_queue)
4409 {
4410         struct cam_devq *devq;
4411
4412         devq = sim->devq;
4413         mtx_lock(&devq->send_mtx);
4414         if (devq->send_queue.qfrozen_cnt <= 0) {
4415 #ifdef INVARIANTS
4416                 printf("xpt_release_simq: requested 1 > present %u\n",
4417                     devq->send_queue.qfrozen_cnt);
4418 #endif
4419         } else
4420                 devq->send_queue.qfrozen_cnt--;
4421         if (devq->send_queue.qfrozen_cnt == 0) {
4422                 /*
4423                  * If there is a timeout scheduled to release this
4424                  * sim queue, remove it.  The queue frozen count is
4425                  * already at 0.
4426                  */
4427                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4428                         callout_stop(&sim->callout);
4429                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4430                 }
4431                 if (run_queue) {
4432                         /*
4433                          * Now that we are unfrozen run the send queue.
4434                          */
4435                         xpt_run_devq(sim->devq);
4436                 }
4437         }
4438         mtx_unlock(&devq->send_mtx);
4439 }
4440
4441 /*
4442  * XXX Appears to be unused.
4443  */
4444 static void
4445 xpt_release_simq_timeout(void *arg)
4446 {
4447         struct cam_sim *sim;
4448
4449         sim = (struct cam_sim *)arg;
4450         xpt_release_simq(sim, /* run_queue */ TRUE);
4451 }
4452
4453 void
4454 xpt_done(union ccb *done_ccb)
4455 {
4456         struct cam_doneq *queue;
4457         int     run, hash;
4458
4459         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4460         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4461                 return;
4462
4463         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4464             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4465         queue = &cam_doneqs[hash];
4466         mtx_lock(&queue->cam_doneq_mtx);
4467         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4468         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4469         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4470         mtx_unlock(&queue->cam_doneq_mtx);
4471         if (run)
4472                 wakeup(&queue->cam_doneq);
4473 }
4474
4475 void
4476 xpt_done_direct(union ccb *done_ccb)
4477 {
4478
4479         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4480         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4481                 return;
4482
4483         xpt_done_process(&done_ccb->ccb_h);
4484 }
4485
4486 union ccb *
4487 xpt_alloc_ccb()
4488 {
4489         union ccb *new_ccb;
4490
4491         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4492         return (new_ccb);
4493 }
4494
4495 union ccb *
4496 xpt_alloc_ccb_nowait()
4497 {
4498         union ccb *new_ccb;
4499
4500         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4501         return (new_ccb);
4502 }
4503
4504 void
4505 xpt_free_ccb(union ccb *free_ccb)
4506 {
4507         free(free_ccb, M_CAMCCB);
4508 }
4509
4510
4511
4512 /* Private XPT functions */
4513
4514 /*
4515  * Get a CAM control block for the caller. Charge the structure to the device
4516  * referenced by the path.  If we don't have sufficient resources to allocate
4517  * more ccbs, we return NULL.
4518  */
4519 static union ccb *
4520 xpt_get_ccb_nowait(struct cam_periph *periph)
4521 {
4522         union ccb *new_ccb;
4523
4524         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_NOWAIT);
4525         if (new_ccb == NULL)
4526                 return (NULL);
4527         periph->periph_allocated++;
4528         cam_ccbq_take_opening(&periph->path->device->ccbq);
4529         return (new_ccb);
4530 }
4531
4532 static union ccb *
4533 xpt_get_ccb(struct cam_periph *periph)
4534 {
4535         union ccb *new_ccb;
4536
4537         cam_periph_unlock(periph);
4538         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_WAITOK);
4539         cam_periph_lock(periph);
4540         periph->periph_allocated++;
4541         cam_ccbq_take_opening(&periph->path->device->ccbq);
4542         return (new_ccb);
4543 }
4544
4545 union ccb *
4546 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4547 {
4548         struct ccb_hdr *ccb_h;
4549
4550         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4551         cam_periph_assert(periph, MA_OWNED);
4552         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4553             ccb_h->pinfo.priority != priority) {
4554                 if (priority < periph->immediate_priority) {
4555                         periph->immediate_priority = priority;
4556                         xpt_run_allocq(periph, 0);
4557                 } else
4558                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4559                             "cgticb", 0);
4560         }
4561         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4562         return ((union ccb *)ccb_h);
4563 }
4564
4565 static void
4566 xpt_acquire_bus(struct cam_eb *bus)
4567 {
4568
4569         xpt_lock_buses();
4570         bus->refcount++;
4571         xpt_unlock_buses();
4572 }
4573
4574 static void
4575 xpt_release_bus(struct cam_eb *bus)
4576 {
4577
4578         xpt_lock_buses();
4579         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4580         if (--bus->refcount > 0) {
4581                 xpt_unlock_buses();
4582                 return;
4583         }
4584         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4585         xsoftc.bus_generation++;
4586         xpt_unlock_buses();
4587         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4588             ("destroying bus, but target list is not empty"));
4589         cam_sim_release(bus->sim);
4590         mtx_destroy(&bus->eb_mtx);
4591         free(bus, M_CAMXPT);
4592 }
4593
4594 static struct cam_et *
4595 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4596 {
4597         struct cam_et *cur_target, *target;
4598
4599         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4600         mtx_assert(&bus->eb_mtx, MA_OWNED);
4601         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4602                                          M_NOWAIT|M_ZERO);
4603         if (target == NULL)
4604                 return (NULL);
4605
4606         TAILQ_INIT(&target->ed_entries);
4607         target->bus = bus;
4608         target->target_id = target_id;
4609         target->refcount = 1;
4610         target->generation = 0;
4611         target->luns = NULL;
4612         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4613         timevalclear(&target->last_reset);
4614         /*
4615          * Hold a reference to our parent bus so it
4616          * will not go away before we do.
4617          */
4618         bus->refcount++;
4619
4620         /* Insertion sort into our bus's target list */
4621         cur_target = TAILQ_FIRST(&bus->et_entries);
4622         while (cur_target != NULL && cur_target->target_id < target_id)
4623                 cur_target = TAILQ_NEXT(cur_target, links);
4624         if (cur_target != NULL) {
4625                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4626         } else {
4627                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4628         }
4629         bus->generation++;
4630         return (target);
4631 }
4632
4633 static void
4634 xpt_acquire_target(struct cam_et *target)
4635 {
4636         struct cam_eb *bus = target->bus;
4637
4638         mtx_lock(&bus->eb_mtx);
4639         target->refcount++;
4640         mtx_unlock(&bus->eb_mtx);
4641 }
4642
4643 static void
4644 xpt_release_target(struct cam_et *target)
4645 {
4646         struct cam_eb *bus = target->bus;
4647
4648         mtx_lock(&bus->eb_mtx);
4649         if (--target->refcount > 0) {
4650                 mtx_unlock(&bus->eb_mtx);
4651                 return;
4652         }
4653         TAILQ_REMOVE(&bus->et_entries, target, links);
4654         bus->generation++;
4655         mtx_unlock(&bus->eb_mtx);
4656         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4657             ("destroying target, but device list is not empty"));
4658         xpt_release_bus(bus);
4659         mtx_destroy(&target->luns_mtx);
4660         if (target->luns)
4661                 free(target->luns, M_CAMXPT);
4662         free(target, M_CAMXPT);
4663 }
4664
4665 static struct cam_ed *
4666 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4667                          lun_id_t lun_id)
4668 {
4669         struct cam_ed *device;
4670
4671         device = xpt_alloc_device(bus, target, lun_id);
4672         if (device == NULL)
4673                 return (NULL);
4674
4675         device->mintags = 1;
4676         device->maxtags = 1;
4677         return (device);
4678 }
4679
4680 static void
4681 xpt_destroy_device(void *context, int pending)
4682 {
4683         struct cam_ed   *device = context;
4684
4685         mtx_lock(&device->device_mtx);
4686         mtx_destroy(&device->device_mtx);
4687         free(device, M_CAMDEV);
4688 }
4689
4690 struct cam_ed *
4691 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4692 {
4693         struct cam_ed   *cur_device, *device;
4694         struct cam_devq *devq;
4695         cam_status status;
4696
4697         mtx_assert(&bus->eb_mtx, MA_OWNED);
4698         /* Make space for us in the device queue on our bus */
4699         devq = bus->sim->devq;
4700         mtx_lock(&devq->send_mtx);
4701         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4702         mtx_unlock(&devq->send_mtx);
4703         if (status != CAM_REQ_CMP)
4704                 return (NULL);
4705
4706         device = (struct cam_ed *)malloc(sizeof(*device),
4707                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4708         if (device == NULL)
4709                 return (NULL);
4710
4711         cam_init_pinfo(&device->devq_entry);
4712         device->target = target;
4713         device->lun_id = lun_id;
4714         device->sim = bus->sim;
4715         if (cam_ccbq_init(&device->ccbq,
4716                           bus->sim->max_dev_openings) != 0) {
4717                 free(device, M_CAMDEV);
4718                 return (NULL);
4719         }
4720         SLIST_INIT(&device->asyncs);
4721         SLIST_INIT(&device->periphs);
4722         device->generation = 0;
4723         device->flags = CAM_DEV_UNCONFIGURED;
4724         device->tag_delay_count = 0;
4725         device->tag_saved_openings = 0;
4726         device->refcount = 1;
4727         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4728         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4729         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4730         /*
4731          * Hold a reference to our parent bus so it
4732          * will not go away before we do.
4733          */
4734         target->refcount++;
4735
4736         cur_device = TAILQ_FIRST(&target->ed_entries);
4737         while (cur_device != NULL && cur_device->lun_id < lun_id)
4738                 cur_device = TAILQ_NEXT(cur_device, links);
4739         if (cur_device != NULL)
4740                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4741         else
4742                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4743         target->generation++;
4744         return (device);
4745 }
4746
4747 void
4748 xpt_acquire_device(struct cam_ed *device)
4749 {
4750         struct cam_eb *bus = device->target->bus;
4751
4752         mtx_lock(&bus->eb_mtx);
4753         device->refcount++;
4754         mtx_unlock(&bus->eb_mtx);
4755 }
4756
4757 void
4758 xpt_release_device(struct cam_ed *device)
4759 {
4760         struct cam_eb *bus = device->target->bus;
4761         struct cam_devq *devq;
4762
4763         mtx_lock(&bus->eb_mtx);
4764         if (--device->refcount > 0) {
4765                 mtx_unlock(&bus->eb_mtx);
4766                 return;
4767         }
4768
4769         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4770         device->target->generation++;
4771         mtx_unlock(&bus->eb_mtx);
4772
4773         /* Release our slot in the devq */
4774         devq = bus->sim->devq;
4775         mtx_lock(&devq->send_mtx);
4776         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4777         mtx_unlock(&devq->send_mtx);
4778
4779         KASSERT(SLIST_EMPTY(&device->periphs),
4780             ("destroying device, but periphs list is not empty"));
4781         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4782             ("destroying device while still queued for ccbs"));
4783
4784         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4785                 callout_stop(&device->callout);
4786
4787         xpt_release_target(device->target);
4788
4789         cam_ccbq_fini(&device->ccbq);
4790         /*
4791          * Free allocated memory.  free(9) does nothing if the
4792          * supplied pointer is NULL, so it is safe to call without
4793          * checking.
4794          */
4795         free(device->supported_vpds, M_CAMXPT);
4796         free(device->device_id, M_CAMXPT);
4797         free(device->ext_inq, M_CAMXPT);
4798         free(device->physpath, M_CAMXPT);
4799         free(device->rcap_buf, M_CAMXPT);
4800         free(device->serial_num, M_CAMXPT);
4801         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4802 }
4803
4804 u_int32_t
4805 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4806 {
4807         int     result;
4808         struct  cam_ed *dev;
4809
4810         dev = path->device;
4811         mtx_lock(&dev->sim->devq->send_mtx);
4812         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4813         mtx_unlock(&dev->sim->devq->send_mtx);
4814         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4815          || (dev->inq_flags & SID_CmdQue) != 0)
4816                 dev->tag_saved_openings = newopenings;
4817         return (result);
4818 }
4819
4820 static struct cam_eb *
4821 xpt_find_bus(path_id_t path_id)
4822 {
4823         struct cam_eb *bus;
4824
4825         xpt_lock_buses();
4826         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4827              bus != NULL;
4828              bus = TAILQ_NEXT(bus, links)) {
4829                 if (bus->path_id == path_id) {
4830                         bus->refcount++;
4831                         break;
4832                 }
4833         }
4834         xpt_unlock_buses();
4835         return (bus);
4836 }
4837
4838 static struct cam_et *
4839 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4840 {
4841         struct cam_et *target;
4842
4843         mtx_assert(&bus->eb_mtx, MA_OWNED);
4844         for (target = TAILQ_FIRST(&bus->et_entries);
4845              target != NULL;
4846              target = TAILQ_NEXT(target, links)) {
4847                 if (target->target_id == target_id) {
4848                         target->refcount++;
4849                         break;
4850                 }
4851         }
4852         return (target);
4853 }
4854
4855 static struct cam_ed *
4856 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4857 {
4858         struct cam_ed *device;
4859
4860         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4861         for (device = TAILQ_FIRST(&target->ed_entries);
4862              device != NULL;
4863              device = TAILQ_NEXT(device, links)) {
4864                 if (device->lun_id == lun_id) {
4865                         device->refcount++;
4866                         break;
4867                 }
4868         }
4869         return (device);
4870 }
4871
4872 void
4873 xpt_start_tags(struct cam_path *path)
4874 {
4875         struct ccb_relsim crs;
4876         struct cam_ed *device;
4877         struct cam_sim *sim;
4878         int    newopenings;
4879
4880         device = path->device;
4881         sim = path->bus->sim;
4882         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4883         xpt_freeze_devq(path, /*count*/1);
4884         device->inq_flags |= SID_CmdQue;
4885         if (device->tag_saved_openings != 0)
4886                 newopenings = device->tag_saved_openings;
4887         else
4888                 newopenings = min(device->maxtags,
4889                                   sim->max_tagged_dev_openings);
4890         xpt_dev_ccbq_resize(path, newopenings);
4891         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4892         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4893         crs.ccb_h.func_code = XPT_REL_SIMQ;
4894         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4895         crs.openings
4896             = crs.release_timeout
4897             = crs.qfrozen_cnt
4898             = 0;
4899         xpt_action((union ccb *)&crs);
4900 }
4901
4902 void
4903 xpt_stop_tags(struct cam_path *path)
4904 {
4905         struct ccb_relsim crs;
4906         struct cam_ed *device;
4907         struct cam_sim *sim;
4908
4909         device = path->device;
4910         sim = path->bus->sim;
4911         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4912         device->tag_delay_count = 0;
4913         xpt_freeze_devq(path, /*count*/1);
4914         device->inq_flags &= ~SID_CmdQue;
4915         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4916         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4917         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4918         crs.ccb_h.func_code = XPT_REL_SIMQ;
4919         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4920         crs.openings
4921             = crs.release_timeout
4922             = crs.qfrozen_cnt
4923             = 0;
4924         xpt_action((union ccb *)&crs);
4925 }
4926
4927 static void
4928 xpt_boot_delay(void *arg)
4929 {
4930
4931         xpt_release_boot();
4932 }
4933
4934 static void
4935 xpt_config(void *arg)
4936 {
4937         /*
4938          * Now that interrupts are enabled, go find our devices
4939          */
4940         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4941                 printf("xpt_config: failed to create taskqueue thread.\n");
4942
4943         /* Setup debugging path */
4944         if (cam_dflags != CAM_DEBUG_NONE) {
4945                 if (xpt_create_path(&cam_dpath, NULL,
4946                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4947                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4948                         printf("xpt_config: xpt_create_path() failed for debug"
4949                                " target %d:%d:%d, debugging disabled\n",
4950                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4951                         cam_dflags = CAM_DEBUG_NONE;
4952                 }
4953         } else
4954                 cam_dpath = NULL;
4955
4956         periphdriver_init(1);
4957         xpt_hold_boot();
4958         callout_init(&xsoftc.boot_callout, 1);
4959         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4960             xpt_boot_delay, NULL, 0);
4961         /* Fire up rescan thread. */
4962         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4963             "cam", "scanner")) {
4964                 printf("xpt_config: failed to create rescan thread.\n");
4965         }
4966 }
4967
4968 void
4969 xpt_hold_boot(void)
4970 {
4971         xpt_lock_buses();
4972         xsoftc.buses_to_config++;
4973         xpt_unlock_buses();
4974 }
4975
4976 void
4977 xpt_release_boot(void)
4978 {
4979         xpt_lock_buses();
4980         xsoftc.buses_to_config--;
4981         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4982                 struct  xpt_task *task;
4983
4984                 xsoftc.buses_config_done = 1;
4985                 xpt_unlock_buses();
4986                 /* Call manually because we don't have any busses */
4987                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4988                 if (task != NULL) {
4989                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4990                         taskqueue_enqueue(taskqueue_thread, &task->task);
4991                 }
4992         } else
4993                 xpt_unlock_buses();
4994 }
4995
4996 /*
4997  * If the given device only has one peripheral attached to it, and if that
4998  * peripheral is the passthrough driver, announce it.  This insures that the
4999  * user sees some sort of announcement for every peripheral in their system.
5000  */
5001 static int
5002 xptpassannouncefunc(struct cam_ed *device, void *arg)
5003 {
5004         struct cam_periph *periph;
5005         int i;
5006
5007         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5008              periph = SLIST_NEXT(periph, periph_links), i++);
5009
5010         periph = SLIST_FIRST(&device->periphs);
5011         if ((i == 1)
5012          && (strncmp(periph->periph_name, "pass", 4) == 0))
5013                 xpt_announce_periph(periph, NULL);
5014
5015         return(1);
5016 }
5017
5018 static void
5019 xpt_finishconfig_task(void *context, int pending)
5020 {
5021
5022         periphdriver_init(2);
5023         /*
5024          * Check for devices with no "standard" peripheral driver
5025          * attached.  For any devices like that, announce the
5026          * passthrough driver so the user will see something.
5027          */
5028         if (!bootverbose)
5029                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5030
5031         /* Release our hook so that the boot can continue. */
5032         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5033         free(xsoftc.xpt_config_hook, M_CAMXPT);
5034         xsoftc.xpt_config_hook = NULL;
5035
5036         free(context, M_CAMXPT);
5037 }
5038
5039 cam_status
5040 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5041                    struct cam_path *path)
5042 {
5043         struct ccb_setasync csa;
5044         cam_status status;
5045         int xptpath = 0;
5046
5047         if (path == NULL) {
5048                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5049                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5050                 if (status != CAM_REQ_CMP)
5051                         return (status);
5052                 xpt_path_lock(path);
5053                 xptpath = 1;
5054         }
5055
5056         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5057         csa.ccb_h.func_code = XPT_SASYNC_CB;
5058         csa.event_enable = event;
5059         csa.callback = cbfunc;
5060         csa.callback_arg = cbarg;
5061         xpt_action((union ccb *)&csa);
5062         status = csa.ccb_h.status;
5063
5064         if (xptpath) {
5065                 xpt_path_unlock(path);
5066                 xpt_free_path(path);
5067         }
5068
5069         if ((status == CAM_REQ_CMP) &&
5070             (csa.event_enable & AC_FOUND_DEVICE)) {
5071                 /*
5072                  * Get this peripheral up to date with all
5073                  * the currently existing devices.
5074                  */
5075                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5076         }
5077         if ((status == CAM_REQ_CMP) &&
5078             (csa.event_enable & AC_PATH_REGISTERED)) {
5079                 /*
5080                  * Get this peripheral up to date with all
5081                  * the currently existing busses.
5082                  */
5083                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5084         }
5085
5086         return (status);
5087 }
5088
5089 static void
5090 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5091 {
5092         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5093
5094         switch (work_ccb->ccb_h.func_code) {
5095         /* Common cases first */
5096         case XPT_PATH_INQ:              /* Path routing inquiry */
5097         {
5098                 struct ccb_pathinq *cpi;
5099
5100                 cpi = &work_ccb->cpi;
5101                 cpi->version_num = 1; /* XXX??? */
5102                 cpi->hba_inquiry = 0;
5103                 cpi->target_sprt = 0;
5104                 cpi->hba_misc = 0;
5105                 cpi->hba_eng_cnt = 0;
5106                 cpi->max_target = 0;
5107                 cpi->max_lun = 0;
5108                 cpi->initiator_id = 0;
5109                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5110                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5111                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5112                 cpi->unit_number = sim->unit_number;
5113                 cpi->bus_id = sim->bus_id;
5114                 cpi->base_transfer_speed = 0;
5115                 cpi->protocol = PROTO_UNSPECIFIED;
5116                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5117                 cpi->transport = XPORT_UNSPECIFIED;
5118                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5119                 cpi->ccb_h.status = CAM_REQ_CMP;
5120                 xpt_done(work_ccb);
5121                 break;
5122         }
5123         default:
5124                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5125                 xpt_done(work_ccb);
5126                 break;
5127         }
5128 }
5129
5130 /*
5131  * The xpt as a "controller" has no interrupt sources, so polling
5132  * is a no-op.
5133  */
5134 static void
5135 xptpoll(struct cam_sim *sim)
5136 {
5137 }
5138
5139 void
5140 xpt_lock_buses(void)
5141 {
5142         mtx_lock(&xsoftc.xpt_topo_lock);
5143 }
5144
5145 void
5146 xpt_unlock_buses(void)
5147 {
5148         mtx_unlock(&xsoftc.xpt_topo_lock);
5149 }
5150
5151 struct mtx *
5152 xpt_path_mtx(struct cam_path *path)
5153 {
5154
5155         return (&path->device->device_mtx);
5156 }
5157
5158 static void
5159 xpt_done_process(struct ccb_hdr *ccb_h)
5160 {
5161         struct cam_sim *sim;
5162         struct cam_devq *devq;
5163         struct mtx *mtx = NULL;
5164
5165         if (ccb_h->flags & CAM_HIGH_POWER) {
5166                 struct highpowerlist    *hphead;
5167                 struct cam_ed           *device;
5168
5169                 mtx_lock(&xsoftc.xpt_highpower_lock);
5170                 hphead = &xsoftc.highpowerq;
5171
5172                 device = STAILQ_FIRST(hphead);
5173
5174                 /*
5175                  * Increment the count since this command is done.
5176                  */
5177                 xsoftc.num_highpower++;
5178
5179                 /*
5180                  * Any high powered commands queued up?
5181                  */
5182                 if (device != NULL) {
5183
5184                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5185                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5186
5187                         mtx_lock(&device->sim->devq->send_mtx);
5188                         xpt_release_devq_device(device,
5189                                          /*count*/1, /*runqueue*/TRUE);
5190                         mtx_unlock(&device->sim->devq->send_mtx);
5191                 } else
5192                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5193         }
5194
5195         sim = ccb_h->path->bus->sim;
5196
5197         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5198                 xpt_release_simq(sim, /*run_queue*/FALSE);
5199                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5200         }
5201
5202         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5203          && (ccb_h->status & CAM_DEV_QFRZN)) {
5204                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5205                 ccb_h->status &= ~CAM_DEV_QFRZN;
5206         }
5207
5208         devq = sim->devq;
5209         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5210                 struct cam_ed *dev = ccb_h->path->device;
5211
5212                 mtx_lock(&devq->send_mtx);
5213                 devq->send_active--;
5214                 devq->send_openings++;
5215                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5216
5217                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5218                   && (dev->ccbq.dev_active == 0))) {
5219                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5220                         xpt_release_devq_device(dev, /*count*/1,
5221                                          /*run_queue*/FALSE);
5222                 }
5223
5224                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5225                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5226                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5227                         xpt_release_devq_device(dev, /*count*/1,
5228                                          /*run_queue*/FALSE);
5229                 }
5230
5231                 if (!device_is_queued(dev))
5232                         (void)xpt_schedule_devq(devq, dev);
5233                 xpt_run_devq(devq);
5234                 mtx_unlock(&devq->send_mtx);
5235
5236                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5237                         mtx = xpt_path_mtx(ccb_h->path);
5238                         mtx_lock(mtx);
5239
5240                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5241                          && (--dev->tag_delay_count == 0))
5242                                 xpt_start_tags(ccb_h->path);
5243                 }
5244         }
5245
5246         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5247                 if (mtx == NULL) {
5248                         mtx = xpt_path_mtx(ccb_h->path);
5249                         mtx_lock(mtx);
5250                 }
5251         } else {
5252                 if (mtx != NULL) {
5253                         mtx_unlock(mtx);
5254                         mtx = NULL;
5255                 }
5256         }
5257
5258         /* Call the peripheral driver's callback */
5259         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5260         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5261         if (mtx != NULL)
5262                 mtx_unlock(mtx);
5263 }
5264
5265 void
5266 xpt_done_td(void *arg)
5267 {
5268         struct cam_doneq *queue = arg;
5269         struct ccb_hdr *ccb_h;
5270         STAILQ_HEAD(, ccb_hdr)  doneq;
5271
5272         STAILQ_INIT(&doneq);
5273         mtx_lock(&queue->cam_doneq_mtx);
5274         while (1) {
5275                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5276                         queue->cam_doneq_sleep = 1;
5277                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5278                             PRIBIO, "-", 0);
5279                         queue->cam_doneq_sleep = 0;
5280                 }
5281                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5282                 mtx_unlock(&queue->cam_doneq_mtx);
5283
5284                 THREAD_NO_SLEEPING();
5285                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5286                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5287                         xpt_done_process(ccb_h);
5288                 }
5289                 THREAD_SLEEPING_OK();
5290
5291                 mtx_lock(&queue->cam_doneq_mtx);
5292         }
5293 }
5294
5295 static void
5296 camisr_runqueue(void)
5297 {
5298         struct  ccb_hdr *ccb_h;
5299         struct cam_doneq *queue;
5300         int i;
5301
5302         /* Process global queues. */
5303         for (i = 0; i < cam_num_doneqs; i++) {
5304                 queue = &cam_doneqs[i];
5305                 mtx_lock(&queue->cam_doneq_mtx);
5306                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5307                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5308                         mtx_unlock(&queue->cam_doneq_mtx);
5309                         xpt_done_process(ccb_h);
5310                         mtx_lock(&queue->cam_doneq_mtx);
5311                 }
5312                 mtx_unlock(&queue->cam_doneq_mtx);
5313         }
5314 }