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         uint32_t                xpt_generation;
  97
  98         /* number of high powered commands that can go through right now */
  99         struct mtx              xpt_highpower_lock;
 100         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 101         int                     num_highpower;
 102
 103         /* queue for handling async rescan requests. */
 104         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 105         int buses_to_config;
 106         int buses_config_done;
 107
 108         /* Registered busses */
 109         TAILQ_HEAD(,cam_eb)     xpt_busses;
 110         u_int                   bus_generation;
 111
 112         struct intr_config_hook *xpt_config_hook;
 113
 114         int                     boot_delay;
 115         struct callout          boot_callout;
 116
 117         struct mtx              xpt_topo_lock;
 118         struct mtx              xpt_lock;
 119         struct taskqueue        *xpt_taskq;
 120 };
 121
 122 typedef enum {
 123         DM_RET_COPY             = 0x01,
 124         DM_RET_FLAG_MASK        = 0x0f,
 125         DM_RET_NONE             = 0x00,
 126         DM_RET_STOP             = 0x10,
 127         DM_RET_DESCEND          = 0x20,
 128         DM_RET_ERROR            = 0x30,
 129         DM_RET_ACTION_MASK      = 0xf0
 130 } dev_match_ret;
 131
 132 typedef enum {
 133         XPT_DEPTH_BUS,
 134         XPT_DEPTH_TARGET,
 135         XPT_DEPTH_DEVICE,
 136         XPT_DEPTH_PERIPH
 137 } xpt_traverse_depth;
 138
 139 struct xpt_traverse_config {
 140         xpt_traverse_depth      depth;
 141         void                    *tr_func;
 142         void                    *tr_arg;
 143 };
 144
 145 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 146 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 147 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 148 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 149 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 150
 151 /* Transport layer configuration information */
 152 static struct xpt_softc xsoftc;
 153
 154 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 155
 156 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
 157 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 158            &xsoftc.boot_delay, 0, "Bus registration wait time");
 159 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 160             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 161
 162 struct cam_doneq {
 163         struct mtx_padalign     cam_doneq_mtx;
 164         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 165         int                     cam_doneq_sleep;
 166 };
 167
 168 static struct cam_doneq cam_doneqs[MAXCPU];
 169 static int cam_num_doneqs;
 170 static struct proc *cam_proc;
 171
 172 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
 173 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 174            &cam_num_doneqs, 0, "Number of completion queues/threads");
 175
 176 struct cam_periph *xpt_periph;
 177
 178 static periph_init_t xpt_periph_init;
 179
 180 static struct periph_driver xpt_driver =
 181 {
 182         xpt_periph_init, "xpt",
 183         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 184         CAM_PERIPH_DRV_EARLY
 185 };
 186
 187 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 188
 189 static d_open_t xptopen;
 190 static d_close_t xptclose;
 191 static d_ioctl_t xptioctl;
 192 static d_ioctl_t xptdoioctl;
 193
 194 static struct cdevsw xpt_cdevsw = {
 195         .d_version =    D_VERSION,
 196         .d_flags =      0,
 197         .d_open =       xptopen,
 198         .d_close =      xptclose,
 199         .d_ioctl =      xptioctl,
 200         .d_name =       "xpt",
 201 };
 202
 203 /* Storage for debugging datastructures */
 204 struct cam_path *cam_dpath;
 205 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 206 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
 207 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
 208         &cam_dflags, 0, "Enabled debug flags");
 209 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 210 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
 211 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
 212         &cam_debug_delay, 0, "Delay in us after each debug message");
 213
 214 /* Our boot-time initialization hook */
 215 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 216
 217 static moduledata_t cam_moduledata = {
 218         "cam",
 219         cam_module_event_handler,
 220         NULL
 221 };
 222
 223 static int      xpt_init(void *);
 224
 225 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 226 MODULE_VERSION(cam, 1);
 227
 228
 229 static void             xpt_async_bcast(struct async_list *async_head,
 230                                         u_int32_t async_code,
 231                                         struct cam_path *path,
 232                                         void *async_arg);
 233 static path_id_t xptnextfreepathid(void);
 234 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 235 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 236 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 237 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 238 static void      xpt_run_allocq_task(void *context, int pending);
 239 static void      xpt_run_devq(struct cam_devq *devq);
 240 static timeout_t xpt_release_devq_timeout;
 241 static void      xpt_release_simq_timeout(void *arg) __unused;
 242 static void      xpt_acquire_bus(struct cam_eb *bus);
 243 static void      xpt_release_bus(struct cam_eb *bus);
 244 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 245 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 246                     int run_queue);
 247 static struct cam_et*
 248                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 249 static void      xpt_acquire_target(struct cam_et *target);
 250 static void      xpt_release_target(struct cam_et *target);
 251 static struct cam_eb*
 252                  xpt_find_bus(path_id_t path_id);
 253 static struct cam_et*
 254                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 255 static struct cam_ed*
 256                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 257 static void      xpt_config(void *arg);
 258 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 259                                  u_int32_t new_priority);
 260 static xpt_devicefunc_t xptpassannouncefunc;
 261 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 262 static void      xptpoll(struct cam_sim *sim);
 263 static void      camisr_runqueue(void);
 264 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 265 static void      xpt_done_td(void *);
 266 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 267                                     u_int num_patterns, struct cam_eb *bus);
 268 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 269                                        u_int num_patterns,
 270                                        struct cam_ed *device);
 271 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 272                                        u_int num_patterns,
 273                                        struct cam_periph *periph);
 274 static xpt_busfunc_t    xptedtbusfunc;
 275 static xpt_targetfunc_t xptedttargetfunc;
 276 static xpt_devicefunc_t xptedtdevicefunc;
 277 static xpt_periphfunc_t xptedtperiphfunc;
 278 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 279 static xpt_periphfunc_t xptplistperiphfunc;
 280 static int              xptedtmatch(struct ccb_dev_match *cdm);
 281 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 282 static int              xptbustraverse(struct cam_eb *start_bus,
 283                                        xpt_busfunc_t *tr_func, void *arg);
 284 static int              xpttargettraverse(struct cam_eb *bus,
 285                                           struct cam_et *start_target,
 286                                           xpt_targetfunc_t *tr_func, void *arg);
 287 static int              xptdevicetraverse(struct cam_et *target,
 288                                           struct cam_ed *start_device,
 289                                           xpt_devicefunc_t *tr_func, void *arg);
 290 static int              xptperiphtraverse(struct cam_ed *device,
 291                                           struct cam_periph *start_periph,
 292                                           xpt_periphfunc_t *tr_func, void *arg);
 293 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 294                                         xpt_pdrvfunc_t *tr_func, void *arg);
 295 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 296                                             struct cam_periph *start_periph,
 297                                             xpt_periphfunc_t *tr_func,
 298                                             void *arg);
 299 static xpt_busfunc_t    xptdefbusfunc;
 300 static xpt_targetfunc_t xptdeftargetfunc;
 301 static xpt_devicefunc_t xptdefdevicefunc;
 302 static xpt_periphfunc_t xptdefperiphfunc;
 303 static void             xpt_finishconfig_task(void *context, int pending);
 304 static void             xpt_dev_async_default(u_int32_t async_code,
 305                                               struct cam_eb *bus,
 306                                               struct cam_et *target,
 307                                               struct cam_ed *device,
 308                                               void *async_arg);
 309 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 310                                                  struct cam_et *target,
 311                                                  lun_id_t lun_id);
 312 static xpt_devicefunc_t xptsetasyncfunc;
 313 static xpt_busfunc_t    xptsetasyncbusfunc;
 314 static cam_status       xptregister(struct cam_periph *periph,
 315                                     void *arg);
 316 static __inline int device_is_queued(struct cam_ed *device);
 317
 318 static __inline int
 319 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 320 {
 321         int     retval;
 322
 323         mtx_assert(&devq->send_mtx, MA_OWNED);
 324         if ((dev->ccbq.queue.entries > 0) &&
 325             (dev->ccbq.dev_openings > 0) &&
 326             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 327                 /*
 328                  * The priority of a device waiting for controller
 329                  * resources is that of the highest priority CCB
 330                  * enqueued.
 331                  */
 332                 retval =
 333                     xpt_schedule_dev(&devq->send_queue,
 334                                      &dev->devq_entry,
 335                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 336         } else {
 337                 retval = 0;
 338         }
 339         return (retval);
 340 }
 341
 342 static __inline int
 343 device_is_queued(struct cam_ed *device)
 344 {
 345         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 346 }
 347
 348 static void
 349 xpt_periph_init()
 350 {
 351         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 352 }
 353
 354 static int
 355 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 356 {
 357
 358         /*
 359          * Only allow read-write access.
 360          */
 361         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 362                 return(EPERM);
 363
 364         /*
 365          * We don't allow nonblocking access.
 366          */
 367         if ((flags & O_NONBLOCK) != 0) {
 368                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 369                 return(ENODEV);
 370         }
 371
 372         return(0);
 373 }
 374
 375 static int
 376 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 377 {
 378
 379         return(0);
 380 }
 381
 382 /*
 383  * Don't automatically grab the xpt softc lock here even though this is going
 384  * through the xpt device.  The xpt device is really just a back door for
 385  * accessing other devices and SIMs, so the right thing to do is to grab
 386  * the appropriate SIM lock once the bus/SIM is located.
 387  */
 388 static int
 389 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 390 {
 391         int error;
 392
 393         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 394                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 395         }
 396         return (error);
 397 }
 398
 399 static int
 400 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 401 {
 402         int error;
 403
 404         error = 0;
 405
 406         switch(cmd) {
 407         /*
 408          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 409          * to accept CCB types that don't quite make sense to send through a
 410          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 411          * in the CAM spec.
 412          */
 413         case CAMIOCOMMAND: {
 414                 union ccb *ccb;
 415                 union ccb *inccb;
 416                 struct cam_eb *bus;
 417
 418                 inccb = (union ccb *)addr;
 419
 420                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 421                 if (bus == NULL)
 422                         return (EINVAL);
 423
 424                 switch (inccb->ccb_h.func_code) {
 425                 case XPT_SCAN_BUS:
 426                 case XPT_RESET_BUS:
 427                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 428                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 429                                 xpt_release_bus(bus);
 430                                 return (EINVAL);
 431                         }
 432                         break;
 433                 case XPT_SCAN_TGT:
 434                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 435                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 436                                 xpt_release_bus(bus);
 437                                 return (EINVAL);
 438                         }
 439                         break;
 440                 default:
 441                         break;
 442                 }
 443
 444                 switch(inccb->ccb_h.func_code) {
 445                 case XPT_SCAN_BUS:
 446                 case XPT_RESET_BUS:
 447                 case XPT_PATH_INQ:
 448                 case XPT_ENG_INQ:
 449                 case XPT_SCAN_LUN:
 450                 case XPT_SCAN_TGT:
 451
 452                         ccb = xpt_alloc_ccb();
 453
 454                         /*
 455                          * Create a path using the bus, target, and lun the
 456                          * user passed in.
 457                          */
 458                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 459                                             inccb->ccb_h.path_id,
 460                                             inccb->ccb_h.target_id,
 461                                             inccb->ccb_h.target_lun) !=
 462                                             CAM_REQ_CMP){
 463                                 error = EINVAL;
 464                                 xpt_free_ccb(ccb);
 465                                 break;
 466                         }
 467                         /* Ensure all of our fields are correct */
 468                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 469                                       inccb->ccb_h.pinfo.priority);
 470                         xpt_merge_ccb(ccb, inccb);
 471                         xpt_path_lock(ccb->ccb_h.path);
 472                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 473                         xpt_path_unlock(ccb->ccb_h.path);
 474                         bcopy(ccb, inccb, sizeof(union ccb));
 475                         xpt_free_path(ccb->ccb_h.path);
 476                         xpt_free_ccb(ccb);
 477                         break;
 478
 479                 case XPT_DEBUG: {
 480                         union ccb ccb;
 481
 482                         /*
 483                          * This is an immediate CCB, so it's okay to
 484                          * allocate it on the stack.
 485                          */
 486
 487                         /*
 488                          * Create a path using the bus, target, and lun the
 489                          * user passed in.
 490                          */
 491                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 492                                             inccb->ccb_h.path_id,
 493                                             inccb->ccb_h.target_id,
 494                                             inccb->ccb_h.target_lun) !=
 495                                             CAM_REQ_CMP){
 496                                 error = EINVAL;
 497                                 break;
 498                         }
 499                         /* Ensure all of our fields are correct */
 500                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 501                                       inccb->ccb_h.pinfo.priority);
 502                         xpt_merge_ccb(&ccb, inccb);
 503                         xpt_action(&ccb);
 504                         bcopy(&ccb, inccb, sizeof(union ccb));
 505                         xpt_free_path(ccb.ccb_h.path);
 506                         break;
 507
 508                 }
 509                 case XPT_DEV_MATCH: {
 510                         struct cam_periph_map_info mapinfo;
 511                         struct cam_path *old_path;
 512
 513                         /*
 514                          * We can't deal with physical addresses for this
 515                          * type of transaction.
 516                          */
 517                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 518                             CAM_DATA_VADDR) {
 519                                 error = EINVAL;
 520                                 break;
 521                         }
 522
 523                         /*
 524                          * Save this in case the caller had it set to
 525                          * something in particular.
 526                          */
 527                         old_path = inccb->ccb_h.path;
 528
 529                         /*
 530                          * We really don't need a path for the matching
 531                          * code.  The path is needed because of the
 532                          * debugging statements in xpt_action().  They
 533                          * assume that the CCB has a valid path.
 534                          */
 535                         inccb->ccb_h.path = xpt_periph->path;
 536
 537                         bzero(&mapinfo, sizeof(mapinfo));
 538
 539                         /*
 540                          * Map the pattern and match buffers into kernel
 541                          * virtual address space.
 542                          */
 543                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 544
 545                         if (error) {
 546                                 inccb->ccb_h.path = old_path;
 547                                 break;
 548                         }
 549
 550                         /*
 551                          * This is an immediate CCB, we can send it on directly.
 552                          */
 553                         xpt_action(inccb);
 554
 555                         /*
 556                          * Map the buffers back into user space.
 557                          */
 558                         cam_periph_unmapmem(inccb, &mapinfo);
 559
 560                         inccb->ccb_h.path = old_path;
 561
 562                         error = 0;
 563                         break;
 564                 }
 565                 default:
 566                         error = ENOTSUP;
 567                         break;
 568                 }
 569                 xpt_release_bus(bus);
 570                 break;
 571         }
 572         /*
 573          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 574          * with the periphal driver name and unit name filled in.  The other
 575          * fields don't really matter as input.  The passthrough driver name
 576          * ("pass"), and unit number are passed back in the ccb.  The current
 577          * device generation number, and the index into the device peripheral
 578          * driver list, and the status are also passed back.  Note that
 579          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 580          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 581          * (or rather should be) impossible for the device peripheral driver
 582          * list to change since we look at the whole thing in one pass, and
 583          * we do it with lock protection.
 584          *
 585          */
 586         case CAMGETPASSTHRU: {
 587                 union ccb *ccb;
 588                 struct cam_periph *periph;
 589                 struct periph_driver **p_drv;
 590                 char   *name;
 591                 u_int unit;
 592                 int base_periph_found;
 593
 594                 ccb = (union ccb *)addr;
 595                 unit = ccb->cgdl.unit_number;
 596                 name = ccb->cgdl.periph_name;
 597                 base_periph_found = 0;
 598
 599                 /*
 600                  * Sanity check -- make sure we don't get a null peripheral
 601                  * driver name.
 602                  */
 603                 if (*ccb->cgdl.periph_name == '\0') {
 604                         error = EINVAL;
 605                         break;
 606                 }
 607
 608                 /* Keep the list from changing while we traverse it */
 609                 xpt_lock_buses();
 610
 611                 /* first find our driver in the list of drivers */
 612                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 613                         if (strcmp((*p_drv)->driver_name, name) == 0)
 614                                 break;
 615
 616                 if (*p_drv == NULL) {
 617                         xpt_unlock_buses();
 618                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 619                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 620                         *ccb->cgdl.periph_name = '\0';
 621                         ccb->cgdl.unit_number = 0;
 622                         error = ENOENT;
 623                         break;
 624                 }
 625
 626                 /*
 627                  * Run through every peripheral instance of this driver
 628                  * and check to see whether it matches the unit passed
 629                  * in by the user.  If it does, get out of the loops and
 630                  * find the passthrough driver associated with that
 631                  * peripheral driver.
 632                  */
 633                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 634                      periph = TAILQ_NEXT(periph, unit_links)) {
 635
 636                         if (periph->unit_number == unit)
 637                                 break;
 638                 }
 639                 /*
 640                  * If we found the peripheral driver that the user passed
 641                  * in, go through all of the peripheral drivers for that
 642                  * particular device and look for a passthrough driver.
 643                  */
 644                 if (periph != NULL) {
 645                         struct cam_ed *device;
 646                         int i;
 647
 648                         base_periph_found = 1;
 649                         device = periph->path->device;
 650                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 651                              periph != NULL;
 652                              periph = SLIST_NEXT(periph, periph_links), i++) {
 653                                 /*
 654                                  * Check to see whether we have a
 655                                  * passthrough device or not.
 656                                  */
 657                                 if (strcmp(periph->periph_name, "pass") == 0) {
 658                                         /*
 659                                          * Fill in the getdevlist fields.
 660                                          */
 661                                         strcpy(ccb->cgdl.periph_name,
 662                                                periph->periph_name);
 663                                         ccb->cgdl.unit_number =
 664                                                 periph->unit_number;
 665                                         if (SLIST_NEXT(periph, periph_links))
 666                                                 ccb->cgdl.status =
 667                                                         CAM_GDEVLIST_MORE_DEVS;
 668                                         else
 669                                                 ccb->cgdl.status =
 670                                                        CAM_GDEVLIST_LAST_DEVICE;
 671                                         ccb->cgdl.generation =
 672                                                 device->generation;
 673                                         ccb->cgdl.index = i;
 674                                         /*
 675                                          * Fill in some CCB header fields
 676                                          * that the user may want.
 677                                          */
 678                                         ccb->ccb_h.path_id =
 679                                                 periph->path->bus->path_id;
 680                                         ccb->ccb_h.target_id =
 681                                                 periph->path->target->target_id;
 682                                         ccb->ccb_h.target_lun =
 683                                                 periph->path->device->lun_id;
 684                                         ccb->ccb_h.status = CAM_REQ_CMP;
 685                                         break;
 686                                 }
 687                         }
 688                 }
 689
 690                 /*
 691                  * If the periph is null here, one of two things has
 692                  * happened.  The first possibility is that we couldn't
 693                  * find the unit number of the particular peripheral driver
 694                  * that the user is asking about.  e.g. the user asks for
 695                  * the passthrough driver for "da11".  We find the list of
 696                  * "da" peripherals all right, but there is no unit 11.
 697                  * The other possibility is that we went through the list
 698                  * of peripheral drivers attached to the device structure,
 699                  * but didn't find one with the name "pass".  Either way,
 700                  * we return ENOENT, since we couldn't find something.
 701                  */
 702                 if (periph == NULL) {
 703                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 704                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 705                         *ccb->cgdl.periph_name = '\0';
 706                         ccb->cgdl.unit_number = 0;
 707                         error = ENOENT;
 708                         /*
 709                          * It is unfortunate that this is even necessary,
 710                          * but there are many, many clueless users out there.
 711                          * If this is true, the user is looking for the
 712                          * passthrough driver, but doesn't have one in his
 713                          * kernel.
 714                          */
 715                         if (base_periph_found == 1) {
 716                                 printf("xptioctl: pass driver is not in the "
 717                                        "kernel\n");
 718                                 printf("xptioctl: put \"device pass\" in "
 719                                        "your kernel config file\n");
 720                         }
 721                 }
 722                 xpt_unlock_buses();
 723                 break;
 724                 }
 725         default:
 726                 error = ENOTTY;
 727                 break;
 728         }
 729
 730         return(error);
 731 }
 732
 733 static int
 734 cam_module_event_handler(module_t mod, int what, void *arg)
 735 {
 736         int error;
 737
 738         switch (what) {
 739         case MOD_LOAD:
 740                 if ((error = xpt_init(NULL)) != 0)
 741                         return (error);
 742                 break;
 743         case MOD_UNLOAD:
 744                 return EBUSY;
 745         default:
 746                 return EOPNOTSUPP;
 747         }
 748
 749         return 0;
 750 }
 751
 752 static void
 753 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 754 {
 755
 756         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 757                 xpt_free_path(done_ccb->ccb_h.path);
 758                 xpt_free_ccb(done_ccb);
 759         } else {
 760                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 761                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 762         }
 763         xpt_release_boot();
 764 }
 765
 766 /* thread to handle bus rescans */
 767 static void
 768 xpt_scanner_thread(void *dummy)
 769 {
 770         union ccb       *ccb;
 771         struct cam_path  path;
 772
 773         xpt_lock_buses();
 774         for (;;) {
 775                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 776                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 777                                "-", 0);
 778                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 779                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 780                         xpt_unlock_buses();
 781
 782                         /*
 783                          * Since lock can be dropped inside and path freed
 784                          * by completion callback even before return here,
 785                          * take our own path copy for reference.
 786                          */
 787                         xpt_copy_path(&path, ccb->ccb_h.path);
 788                         xpt_path_lock(&path);
 789                         xpt_action(ccb);
 790                         xpt_path_unlock(&path);
 791                         xpt_release_path(&path);
 792
 793                         xpt_lock_buses();
 794                 }
 795         }
 796 }
 797
 798 void
 799 xpt_rescan(union ccb *ccb)
 800 {
 801         struct ccb_hdr *hdr;
 802
 803         /* Prepare request */
 804         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 805             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 806                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 807         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 808             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 809                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 810         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 811             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 812                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 813         else {
 814                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 815                 xpt_free_path(ccb->ccb_h.path);
 816                 xpt_free_ccb(ccb);
 817                 return;
 818         }
 819         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 820         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 821         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 822         /* Don't make duplicate entries for the same paths. */
 823         xpt_lock_buses();
 824         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 825                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 826                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 827                                 wakeup(&xsoftc.ccb_scanq);
 828                                 xpt_unlock_buses();
 829                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 830                                 xpt_free_path(ccb->ccb_h.path);
 831                                 xpt_free_ccb(ccb);
 832                                 return;
 833                         }
 834                 }
 835         }
 836         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 837         xsoftc.buses_to_config++;
 838         wakeup(&xsoftc.ccb_scanq);
 839         xpt_unlock_buses();
 840 }
 841
 842 /* Functions accessed by the peripheral drivers */
 843 static int
 844 xpt_init(void *dummy)
 845 {
 846         struct cam_sim *xpt_sim;
 847         struct cam_path *path;
 848         struct cam_devq *devq;
 849         cam_status status;
 850         int error, i;
 851
 852         TAILQ_INIT(&xsoftc.xpt_busses);
 853         TAILQ_INIT(&xsoftc.ccb_scanq);
 854         STAILQ_INIT(&xsoftc.highpowerq);
 855         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 856
 857         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 858         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 859         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 860             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 861
 862 #ifdef CAM_BOOT_DELAY
 863         /*
 864          * Override this value at compile time to assist our users
 865          * who don't use loader to boot a kernel.
 866          */
 867         xsoftc.boot_delay = CAM_BOOT_DELAY;
 868 #endif
 869         /*
 870          * The xpt layer is, itself, the equivalent of a SIM.
 871          * Allow 16 ccbs in the ccb pool for it.  This should
 872          * give decent parallelism when we probe busses and
 873          * perform other XPT functions.
 874          */
 875         devq = cam_simq_alloc(16);
 876         xpt_sim = cam_sim_alloc(xptaction,
 877                                 xptpoll,
 878                                 "xpt",
 879                                 /*softc*/NULL,
 880                                 /*unit*/0,
 881                                 /*mtx*/&xsoftc.xpt_lock,
 882                                 /*max_dev_transactions*/0,
 883                                 /*max_tagged_dev_transactions*/0,
 884                                 devq);
 885         if (xpt_sim == NULL)
 886                 return (ENOMEM);
 887
 888         mtx_lock(&xsoftc.xpt_lock);
 889         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 890                 mtx_unlock(&xsoftc.xpt_lock);
 891                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 892                        " failing attach\n", status);
 893                 return (EINVAL);
 894         }
 895         mtx_unlock(&xsoftc.xpt_lock);
 896
 897         /*
 898          * Looking at the XPT from the SIM layer, the XPT is
 899          * the equivalent of a peripheral driver.  Allocate
 900          * a peripheral driver entry for us.
 901          */
 902         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 903                                       CAM_TARGET_WILDCARD,
 904                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 905                 printf("xpt_init: xpt_create_path failed with status %#x,"
 906                        " failing attach\n", status);
 907                 return (EINVAL);
 908         }
 909         xpt_path_lock(path);
 910         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 911                          path, NULL, 0, xpt_sim);
 912         xpt_path_unlock(path);
 913         xpt_free_path(path);
 914
 915         if (cam_num_doneqs < 1)
 916                 cam_num_doneqs = 1 + mp_ncpus / 6;
 917         else if (cam_num_doneqs > MAXCPU)
 918                 cam_num_doneqs = MAXCPU;
 919         for (i = 0; i < cam_num_doneqs; i++) {
 920                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 921                     MTX_DEF);
 922                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 923                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 924                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 925                 if (error != 0) {
 926                         cam_num_doneqs = i;
 927                         break;
 928                 }
 929         }
 930         if (cam_num_doneqs < 1) {
 931                 printf("xpt_init: Cannot init completion queues "
 932                        "- failing attach\n");
 933                 return (ENOMEM);
 934         }
 935         /*
 936          * Register a callback for when interrupts are enabled.
 937          */
 938         xsoftc.xpt_config_hook =
 939             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 940                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 941         if (xsoftc.xpt_config_hook == NULL) {
 942                 printf("xpt_init: Cannot malloc config hook "
 943                        "- failing attach\n");
 944                 return (ENOMEM);
 945         }
 946         xsoftc.xpt_config_hook->ich_func = xpt_config;
 947         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 948                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 949                 printf("xpt_init: config_intrhook_establish failed "
 950                        "- failing attach\n");
 951         }
 952
 953         return (0);
 954 }
 955
 956 static cam_status
 957 xptregister(struct cam_periph *periph, void *arg)
 958 {
 959         struct cam_sim *xpt_sim;
 960
 961         if (periph == NULL) {
 962                 printf("xptregister: periph was NULL!!\n");
 963                 return(CAM_REQ_CMP_ERR);
 964         }
 965
 966         xpt_sim = (struct cam_sim *)arg;
 967         xpt_sim->softc = periph;
 968         xpt_periph = periph;
 969         periph->softc = NULL;
 970
 971         return(CAM_REQ_CMP);
 972 }
 973
 974 int32_t
 975 xpt_add_periph(struct cam_periph *periph)
 976 {
 977         struct cam_ed *device;
 978         int32_t  status;
 979
 980         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
 981         device = periph->path->device;
 982         status = CAM_REQ_CMP;
 983         if (device != NULL) {
 984                 mtx_lock(&device->target->bus->eb_mtx);
 985                 device->generation++;
 986                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
 987                 mtx_unlock(&device->target->bus->eb_mtx);
 988                 atomic_add_32(&xsoftc.xpt_generation, 1);
 989         }
 990
 991         return (status);
 992 }
 993
 994 void
 995 xpt_remove_periph(struct cam_periph *periph)
 996 {
 997         struct cam_ed *device;
 998
 999         device = periph->path->device;
1000         if (device != NULL) {
1001                 mtx_lock(&device->target->bus->eb_mtx);
1002                 device->generation++;
1003                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1004                 mtx_unlock(&device->target->bus->eb_mtx);
1005                 atomic_add_32(&xsoftc.xpt_generation, 1);
1006         }
1007 }
1008
1009
1010 void
1011 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1012 {
1013         struct  cam_path *path = periph->path;
1014
1015         cam_periph_assert(periph, MA_OWNED);
1016         periph->flags |= CAM_PERIPH_ANNOUNCED;
1017
1018         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1019                periph->periph_name, periph->unit_number,
1020                path->bus->sim->sim_name,
1021                path->bus->sim->unit_number,
1022                path->bus->sim->bus_id,
1023                path->bus->path_id,
1024                path->target->target_id,
1025                (uintmax_t)path->device->lun_id);
1026         printf("%s%d: ", periph->periph_name, periph->unit_number);
1027         if (path->device->protocol == PROTO_SCSI)
1028                 scsi_print_inquiry(&path->device->inq_data);
1029         else if (path->device->protocol == PROTO_ATA ||
1030             path->device->protocol == PROTO_SATAPM)
1031                 ata_print_ident(&path->device->ident_data);
1032         else if (path->device->protocol == PROTO_SEMB)
1033                 semb_print_ident(
1034                     (struct sep_identify_data *)&path->device->ident_data);
1035         else
1036                 printf("Unknown protocol device\n");
1037         if (path->device->serial_num_len > 0) {
1038                 /* Don't wrap the screen  - print only the first 60 chars */
1039                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1040                        periph->unit_number, path->device->serial_num);
1041         }
1042         /* Announce transport details. */
1043         (*(path->bus->xport->announce))(periph);
1044         /* Announce command queueing. */
1045         if (path->device->inq_flags & SID_CmdQue
1046          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1047                 printf("%s%d: Command Queueing enabled\n",
1048                        periph->periph_name, periph->unit_number);
1049         }
1050         /* Announce caller's details if they've passed in. */
1051         if (announce_string != NULL)
1052                 printf("%s%d: %s\n", periph->periph_name,
1053                        periph->unit_number, announce_string);
1054 }
1055
1056 void
1057 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1058 {
1059         if (quirks != 0) {
1060                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1061                     periph->unit_number, quirks, bit_string);
1062         }
1063 }
1064
1065 void
1066 xpt_denounce_periph(struct cam_periph *periph)
1067 {
1068         struct  cam_path *path = periph->path;
1069
1070         cam_periph_assert(periph, MA_OWNED);
1071         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1072                periph->periph_name, periph->unit_number,
1073                path->bus->sim->sim_name,
1074                path->bus->sim->unit_number,
1075                path->bus->sim->bus_id,
1076                path->bus->path_id,
1077                path->target->target_id,
1078                (uintmax_t)path->device->lun_id);
1079         printf("%s%d: ", periph->periph_name, periph->unit_number);
1080         if (path->device->protocol == PROTO_SCSI)
1081                 scsi_print_inquiry_short(&path->device->inq_data);
1082         else if (path->device->protocol == PROTO_ATA ||
1083             path->device->protocol == PROTO_SATAPM)
1084                 ata_print_ident_short(&path->device->ident_data);
1085         else if (path->device->protocol == PROTO_SEMB)
1086                 semb_print_ident_short(
1087                     (struct sep_identify_data *)&path->device->ident_data);
1088         else
1089                 printf("Unknown protocol device");
1090         if (path->device->serial_num_len > 0)
1091                 printf(" s/n %.60s", path->device->serial_num);
1092         printf(" detached\n");
1093 }
1094
1095
1096 int
1097 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1098 {
1099         int ret = -1, l, o;
1100         struct ccb_dev_advinfo cdai;
1101         struct scsi_vpd_id_descriptor *idd;
1102
1103         xpt_path_assert(path, MA_OWNED);
1104
1105         memset(&cdai, 0, sizeof(cdai));
1106         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1107         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1108         cdai.flags = CDAI_FLAG_NONE;
1109         cdai.bufsiz = len;
1110
1111         if (!strcmp(attr, "GEOM::ident"))
1112                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1113         else if (!strcmp(attr, "GEOM::physpath"))
1114                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1115         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1116                  strcmp(attr, "GEOM::lunname") == 0) {
1117                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1118                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1119         } else
1120                 goto out;
1121
1122         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1123         if (cdai.buf == NULL) {
1124                 ret = ENOMEM;
1125                 goto out;
1126         }
1127         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1128         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1129                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1130         if (cdai.provsiz == 0)
1131                 goto out;
1132         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1133                 if (strcmp(attr, "GEOM::lunid") == 0) {
1134                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1135                             cdai.provsiz, scsi_devid_is_lun_naa);
1136                         if (idd == NULL)
1137                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1139                         if (idd == NULL)
1140                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1141                                     cdai.provsiz, scsi_devid_is_lun_uuid);
1142                         if (idd == NULL)
1143                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1144                                     cdai.provsiz, scsi_devid_is_lun_md5);
1145                 } else
1146                         idd = NULL;
1147                 if (idd == NULL)
1148                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1149                             cdai.provsiz, scsi_devid_is_lun_t10);
1150                 if (idd == NULL)
1151                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1152                             cdai.provsiz, scsi_devid_is_lun_name);
1153                 if (idd == NULL)
1154                         goto out;
1155                 ret = 0;
1156                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1157                         if (idd->length < len) {
1158                                 for (l = 0; l < idd->length; l++)
1159                                         buf[l] = idd->identifier[l] ?
1160                                             idd->identifier[l] : ' ';
1161                                 buf[l] = 0;
1162                         } else
1163                                 ret = EFAULT;
1164                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1165                         l = strnlen(idd->identifier, idd->length);
1166                         if (l < len) {
1167                                 bcopy(idd->identifier, buf, l);
1168                                 buf[l] = 0;
1169                         } else
1170                                 ret = EFAULT;
1171                 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1172                     && idd->identifier[0] == 0x10) {
1173                         if ((idd->length - 2) * 2 + 4 < len) {
1174                                 for (l = 2, o = 0; l < idd->length; l++) {
1175                                         if (l == 6 || l == 8 || l == 10 || l == 12)
1176                                             o += sprintf(buf + o, "-");
1177                                         o += sprintf(buf + o, "%02x",
1178                                             idd->identifier[l]);
1179                                 }
1180                         } else
1181                                 ret = EFAULT;
1182                 } else {
1183                         if (idd->length * 2 < len) {
1184                                 for (l = 0; l < idd->length; l++)
1185                                         sprintf(buf + l * 2, "%02x",
1186                                             idd->identifier[l]);
1187                         } else
1188                                 ret = EFAULT;
1189                 }
1190         } else {
1191                 ret = 0;
1192                 if (strlcpy(buf, cdai.buf, len) >= len)
1193                         ret = EFAULT;
1194         }
1195
1196 out:
1197         if (cdai.buf != NULL)
1198                 free(cdai.buf, M_CAMXPT);
1199         return ret;
1200 }
1201
1202 static dev_match_ret
1203 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1204             struct cam_eb *bus)
1205 {
1206         dev_match_ret retval;
1207         u_int i;
1208
1209         retval = DM_RET_NONE;
1210
1211         /*
1212          * If we aren't given something to match against, that's an error.
1213          */
1214         if (bus == NULL)
1215                 return(DM_RET_ERROR);
1216
1217         /*
1218          * If there are no match entries, then this bus matches no
1219          * matter what.
1220          */
1221         if ((patterns == NULL) || (num_patterns == 0))
1222                 return(DM_RET_DESCEND | DM_RET_COPY);
1223
1224         for (i = 0; i < num_patterns; i++) {
1225                 struct bus_match_pattern *cur_pattern;
1226
1227                 /*
1228                  * If the pattern in question isn't for a bus node, we
1229                  * aren't interested.  However, we do indicate to the
1230                  * calling routine that we should continue descending the
1231                  * tree, since the user wants to match against lower-level
1232                  * EDT elements.
1233                  */
1234                 if (patterns[i].type != DEV_MATCH_BUS) {
1235                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1236                                 retval |= DM_RET_DESCEND;
1237                         continue;
1238                 }
1239
1240                 cur_pattern = &patterns[i].pattern.bus_pattern;
1241
1242                 /*
1243                  * If they want to match any bus node, we give them any
1244                  * device node.
1245                  */
1246                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1247                         /* set the copy flag */
1248                         retval |= DM_RET_COPY;
1249
1250                         /*
1251                          * If we've already decided on an action, go ahead
1252                          * and return.
1253                          */
1254                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1255                                 return(retval);
1256                 }
1257
1258                 /*
1259                  * Not sure why someone would do this...
1260                  */
1261                 if (cur_pattern->flags == BUS_MATCH_NONE)
1262                         continue;
1263
1264                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1265                  && (cur_pattern->path_id != bus->path_id))
1266                         continue;
1267
1268                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1269                  && (cur_pattern->bus_id != bus->sim->bus_id))
1270                         continue;
1271
1272                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1273                  && (cur_pattern->unit_number != bus->sim->unit_number))
1274                         continue;
1275
1276                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1277                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1278                              DEV_IDLEN) != 0))
1279                         continue;
1280
1281                 /*
1282                  * If we get to this point, the user definitely wants
1283                  * information on this bus.  So tell the caller to copy the
1284                  * data out.
1285                  */
1286                 retval |= DM_RET_COPY;
1287
1288                 /*
1289                  * If the return action has been set to descend, then we
1290                  * know that we've already seen a non-bus matching
1291                  * expression, therefore we need to further descend the tree.
1292                  * This won't change by continuing around the loop, so we
1293                  * go ahead and return.  If we haven't seen a non-bus
1294                  * matching expression, we keep going around the loop until
1295                  * we exhaust the matching expressions.  We'll set the stop
1296                  * flag once we fall out of the loop.
1297                  */
1298                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1299                         return(retval);
1300         }
1301
1302         /*
1303          * If the return action hasn't been set to descend yet, that means
1304          * we haven't seen anything other than bus matching patterns.  So
1305          * tell the caller to stop descending the tree -- the user doesn't
1306          * want to match against lower level tree elements.
1307          */
1308         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1309                 retval |= DM_RET_STOP;
1310
1311         return(retval);
1312 }
1313
1314 static dev_match_ret
1315 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1316                struct cam_ed *device)
1317 {
1318         dev_match_ret retval;
1319         u_int i;
1320
1321         retval = DM_RET_NONE;
1322
1323         /*
1324          * If we aren't given something to match against, that's an error.
1325          */
1326         if (device == NULL)
1327                 return(DM_RET_ERROR);
1328
1329         /*
1330          * If there are no match entries, then this device matches no
1331          * matter what.
1332          */
1333         if ((patterns == NULL) || (num_patterns == 0))
1334                 return(DM_RET_DESCEND | DM_RET_COPY);
1335
1336         for (i = 0; i < num_patterns; i++) {
1337                 struct device_match_pattern *cur_pattern;
1338                 struct scsi_vpd_device_id *device_id_page;
1339
1340                 /*
1341                  * If the pattern in question isn't for a device node, we
1342                  * aren't interested.
1343                  */
1344                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1345                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1346                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1347                                 retval |= DM_RET_DESCEND;
1348                         continue;
1349                 }
1350
1351                 cur_pattern = &patterns[i].pattern.device_pattern;
1352
1353                 /* Error out if mutually exclusive options are specified. */
1354                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1355                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1356                         return(DM_RET_ERROR);
1357
1358                 /*
1359                  * If they want to match any device node, we give them any
1360                  * device node.
1361                  */
1362                 if (cur_pattern->flags == DEV_MATCH_ANY)
1363                         goto copy_dev_node;
1364
1365                 /*
1366                  * Not sure why someone would do this...
1367                  */
1368                 if (cur_pattern->flags == DEV_MATCH_NONE)
1369                         continue;
1370
1371                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1372                  && (cur_pattern->path_id != device->target->bus->path_id))
1373                         continue;
1374
1375                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1376                  && (cur_pattern->target_id != device->target->target_id))
1377                         continue;
1378
1379                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1380                  && (cur_pattern->target_lun != device->lun_id))
1381                         continue;
1382
1383                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1384                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1385                                     (caddr_t)&cur_pattern->data.inq_pat,
1386                                     1, sizeof(cur_pattern->data.inq_pat),
1387                                     scsi_static_inquiry_match) == NULL))
1388                         continue;
1389
1390                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1391                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1392                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1393                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1394                                       device->device_id_len
1395                                     - SVPD_DEVICE_ID_HDR_LEN,
1396                                       cur_pattern->data.devid_pat.id,
1397                                       cur_pattern->data.devid_pat.id_len) != 0))
1398                         continue;
1399
1400 copy_dev_node:
1401                 /*
1402                  * If we get to this point, the user definitely wants
1403                  * information on this device.  So tell the caller to copy
1404                  * the data out.
1405                  */
1406                 retval |= DM_RET_COPY;
1407
1408                 /*
1409                  * If the return action has been set to descend, then we
1410                  * know that we've already seen a peripheral matching
1411                  * expression, therefore we need to further descend the tree.
1412                  * This won't change by continuing around the loop, so we
1413                  * go ahead and return.  If we haven't seen a peripheral
1414                  * matching expression, we keep going around the loop until
1415                  * we exhaust the matching expressions.  We'll set the stop
1416                  * flag once we fall out of the loop.
1417                  */
1418                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1419                         return(retval);
1420         }
1421
1422         /*
1423          * If the return action hasn't been set to descend yet, that means
1424          * we haven't seen any peripheral matching patterns.  So tell the
1425          * caller to stop descending the tree -- the user doesn't want to
1426          * match against lower level tree elements.
1427          */
1428         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1429                 retval |= DM_RET_STOP;
1430
1431         return(retval);
1432 }
1433
1434 /*
1435  * Match a single peripheral against any number of match patterns.
1436  */
1437 static dev_match_ret
1438 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1439                struct cam_periph *periph)
1440 {
1441         dev_match_ret retval;
1442         u_int i;
1443
1444         /*
1445          * If we aren't given something to match against, that's an error.
1446          */
1447         if (periph == NULL)
1448                 return(DM_RET_ERROR);
1449
1450         /*
1451          * If there are no match entries, then this peripheral matches no
1452          * matter what.
1453          */
1454         if ((patterns == NULL) || (num_patterns == 0))
1455                 return(DM_RET_STOP | DM_RET_COPY);
1456
1457         /*
1458          * There aren't any nodes below a peripheral node, so there's no
1459          * reason to descend the tree any further.
1460          */
1461         retval = DM_RET_STOP;
1462
1463         for (i = 0; i < num_patterns; i++) {
1464                 struct periph_match_pattern *cur_pattern;
1465
1466                 /*
1467                  * If the pattern in question isn't for a peripheral, we
1468                  * aren't interested.
1469                  */
1470                 if (patterns[i].type != DEV_MATCH_PERIPH)
1471                         continue;
1472
1473                 cur_pattern = &patterns[i].pattern.periph_pattern;
1474
1475                 /*
1476                  * If they want to match on anything, then we will do so.
1477                  */
1478                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1479                         /* set the copy flag */
1480                         retval |= DM_RET_COPY;
1481
1482                         /*
1483                          * We've already set the return action to stop,
1484                          * since there are no nodes below peripherals in
1485                          * the tree.
1486                          */
1487                         return(retval);
1488                 }
1489
1490                 /*
1491                  * Not sure why someone would do this...
1492                  */
1493                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1494                         continue;
1495
1496                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1497                  && (cur_pattern->path_id != periph->path->bus->path_id))
1498                         continue;
1499
1500                 /*
1501                  * For the target and lun id's, we have to make sure the
1502                  * target and lun pointers aren't NULL.  The xpt peripheral
1503                  * has a wildcard target and device.
1504                  */
1505                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1506                  && ((periph->path->target == NULL)
1507                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1508                         continue;
1509
1510                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1511                  && ((periph->path->device == NULL)
1512                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1513                         continue;
1514
1515                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1516                  && (cur_pattern->unit_number != periph->unit_number))
1517                         continue;
1518
1519                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1520                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1521                              DEV_IDLEN) != 0))
1522                         continue;
1523
1524                 /*
1525                  * If we get to this point, the user definitely wants
1526                  * information on this peripheral.  So tell the caller to
1527                  * copy the data out.
1528                  */
1529                 retval |= DM_RET_COPY;
1530
1531                 /*
1532                  * The return action has already been set to stop, since
1533                  * peripherals don't have any nodes below them in the EDT.
1534                  */
1535                 return(retval);
1536         }
1537
1538         /*
1539          * If we get to this point, the peripheral that was passed in
1540          * doesn't match any of the patterns.
1541          */
1542         return(retval);
1543 }
1544
1545 static int
1546 xptedtbusfunc(struct cam_eb *bus, void *arg)
1547 {
1548         struct ccb_dev_match *cdm;
1549         struct cam_et *target;
1550         dev_match_ret retval;
1551
1552         cdm = (struct ccb_dev_match *)arg;
1553
1554         /*
1555          * If our position is for something deeper in the tree, that means
1556          * that we've already seen this node.  So, we keep going down.
1557          */
1558         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1559          && (cdm->pos.cookie.bus == bus)
1560          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1561          && (cdm->pos.cookie.target != NULL))
1562                 retval = DM_RET_DESCEND;
1563         else
1564                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1565
1566         /*
1567          * If we got an error, bail out of the search.
1568          */
1569         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1570                 cdm->status = CAM_DEV_MATCH_ERROR;
1571                 return(0);
1572         }
1573
1574         /*
1575          * If the copy flag is set, copy this bus out.
1576          */
1577         if (retval & DM_RET_COPY) {
1578                 int spaceleft, j;
1579
1580                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1581                         sizeof(struct dev_match_result));
1582
1583                 /*
1584                  * If we don't have enough space to put in another
1585                  * match result, save our position and tell the
1586                  * user there are more devices to check.
1587                  */
1588                 if (spaceleft < sizeof(struct dev_match_result)) {
1589                         bzero(&cdm->pos, sizeof(cdm->pos));
1590                         cdm->pos.position_type =
1591                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1592
1593                         cdm->pos.cookie.bus = bus;
1594                         cdm->pos.generations[CAM_BUS_GENERATION]=
1595                                 xsoftc.bus_generation;
1596                         cdm->status = CAM_DEV_MATCH_MORE;
1597                         return(0);
1598                 }
1599                 j = cdm->num_matches;
1600                 cdm->num_matches++;
1601                 cdm->matches[j].type = DEV_MATCH_BUS;
1602                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1603                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1604                 cdm->matches[j].result.bus_result.unit_number =
1605                         bus->sim->unit_number;
1606                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1607                         bus->sim->sim_name, DEV_IDLEN);
1608         }
1609
1610         /*
1611          * If the user is only interested in busses, there's no
1612          * reason to descend to the next level in the tree.
1613          */
1614         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1615                 return(1);
1616
1617         /*
1618          * If there is a target generation recorded, check it to
1619          * make sure the target list hasn't changed.
1620          */
1621         mtx_lock(&bus->eb_mtx);
1622         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1623          && (cdm->pos.cookie.bus == bus)
1624          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1625          && (cdm->pos.cookie.target != NULL)) {
1626                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1627                     bus->generation)) {
1628                         mtx_unlock(&bus->eb_mtx);
1629                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1630                         return (0);
1631                 }
1632                 target = (struct cam_et *)cdm->pos.cookie.target;
1633                 target->refcount++;
1634         } else
1635                 target = NULL;
1636         mtx_unlock(&bus->eb_mtx);
1637
1638         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1639 }
1640
1641 static int
1642 xptedttargetfunc(struct cam_et *target, void *arg)
1643 {
1644         struct ccb_dev_match *cdm;
1645         struct cam_eb *bus;
1646         struct cam_ed *device;
1647
1648         cdm = (struct ccb_dev_match *)arg;
1649         bus = target->bus;
1650
1651         /*
1652          * If there is a device list generation recorded, check it to
1653          * make sure the device list hasn't changed.
1654          */
1655         mtx_lock(&bus->eb_mtx);
1656         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1657          && (cdm->pos.cookie.bus == bus)
1658          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1659          && (cdm->pos.cookie.target == target)
1660          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1661          && (cdm->pos.cookie.device != NULL)) {
1662                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1663                     target->generation) {
1664                         mtx_unlock(&bus->eb_mtx);
1665                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1666                         return(0);
1667                 }
1668                 device = (struct cam_ed *)cdm->pos.cookie.device;
1669                 device->refcount++;
1670         } else
1671                 device = NULL;
1672         mtx_unlock(&bus->eb_mtx);
1673
1674         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1675 }
1676
1677 static int
1678 xptedtdevicefunc(struct cam_ed *device, void *arg)
1679 {
1680         struct cam_eb *bus;
1681         struct cam_periph *periph;
1682         struct ccb_dev_match *cdm;
1683         dev_match_ret retval;
1684
1685         cdm = (struct ccb_dev_match *)arg;
1686         bus = device->target->bus;
1687
1688         /*
1689          * If our position is for something deeper in the tree, that means
1690          * that we've already seen this node.  So, we keep going down.
1691          */
1692         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1693          && (cdm->pos.cookie.device == device)
1694          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1695          && (cdm->pos.cookie.periph != NULL))
1696                 retval = DM_RET_DESCEND;
1697         else
1698                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1699                                         device);
1700
1701         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1702                 cdm->status = CAM_DEV_MATCH_ERROR;
1703                 return(0);
1704         }
1705
1706         /*
1707          * If the copy flag is set, copy this device out.
1708          */
1709         if (retval & DM_RET_COPY) {
1710                 int spaceleft, j;
1711
1712                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1713                         sizeof(struct dev_match_result));
1714
1715                 /*
1716                  * If we don't have enough space to put in another
1717                  * match result, save our position and tell the
1718                  * user there are more devices to check.
1719                  */
1720                 if (spaceleft < sizeof(struct dev_match_result)) {
1721                         bzero(&cdm->pos, sizeof(cdm->pos));
1722                         cdm->pos.position_type =
1723                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1724                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1725
1726                         cdm->pos.cookie.bus = device->target->bus;
1727                         cdm->pos.generations[CAM_BUS_GENERATION]=
1728                                 xsoftc.bus_generation;
1729                         cdm->pos.cookie.target = device->target;
1730                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1731                                 device->target->bus->generation;
1732                         cdm->pos.cookie.device = device;
1733                         cdm->pos.generations[CAM_DEV_GENERATION] =
1734                                 device->target->generation;
1735                         cdm->status = CAM_DEV_MATCH_MORE;
1736                         return(0);
1737                 }
1738                 j = cdm->num_matches;
1739                 cdm->num_matches++;
1740                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1741                 cdm->matches[j].result.device_result.path_id =
1742                         device->target->bus->path_id;
1743                 cdm->matches[j].result.device_result.target_id =
1744                         device->target->target_id;
1745                 cdm->matches[j].result.device_result.target_lun =
1746                         device->lun_id;
1747                 cdm->matches[j].result.device_result.protocol =
1748                         device->protocol;
1749                 bcopy(&device->inq_data,
1750                       &cdm->matches[j].result.device_result.inq_data,
1751                       sizeof(struct scsi_inquiry_data));
1752                 bcopy(&device->ident_data,
1753                       &cdm->matches[j].result.device_result.ident_data,
1754                       sizeof(struct ata_params));
1755
1756                 /* Let the user know whether this device is unconfigured */
1757                 if (device->flags & CAM_DEV_UNCONFIGURED)
1758                         cdm->matches[j].result.device_result.flags =
1759                                 DEV_RESULT_UNCONFIGURED;
1760                 else
1761                         cdm->matches[j].result.device_result.flags =
1762                                 DEV_RESULT_NOFLAG;
1763         }
1764
1765         /*
1766          * If the user isn't interested in peripherals, don't descend
1767          * the tree any further.
1768          */
1769         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1770                 return(1);
1771
1772         /*
1773          * If there is a peripheral list generation recorded, make sure
1774          * it hasn't changed.
1775          */
1776         xpt_lock_buses();
1777         mtx_lock(&bus->eb_mtx);
1778         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1779          && (cdm->pos.cookie.bus == bus)
1780          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1781          && (cdm->pos.cookie.target == device->target)
1782          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1783          && (cdm->pos.cookie.device == device)
1784          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1785          && (cdm->pos.cookie.periph != NULL)) {
1786                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1787                     device->generation) {
1788                         mtx_unlock(&bus->eb_mtx);
1789                         xpt_unlock_buses();
1790                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1791                         return(0);
1792                 }
1793                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1794                 periph->refcount++;
1795         } else
1796                 periph = NULL;
1797         mtx_unlock(&bus->eb_mtx);
1798         xpt_unlock_buses();
1799
1800         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1801 }
1802
1803 static int
1804 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1805 {
1806         struct ccb_dev_match *cdm;
1807         dev_match_ret retval;
1808
1809         cdm = (struct ccb_dev_match *)arg;
1810
1811         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1812
1813         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1814                 cdm->status = CAM_DEV_MATCH_ERROR;
1815                 return(0);
1816         }
1817
1818         /*
1819          * If the copy flag is set, copy this peripheral out.
1820          */
1821         if (retval & DM_RET_COPY) {
1822                 int spaceleft, j;
1823
1824                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1825                         sizeof(struct dev_match_result));
1826
1827                 /*
1828                  * If we don't have enough space to put in another
1829                  * match result, save our position and tell the
1830                  * user there are more devices to check.
1831                  */
1832                 if (spaceleft < sizeof(struct dev_match_result)) {
1833                         bzero(&cdm->pos, sizeof(cdm->pos));
1834                         cdm->pos.position_type =
1835                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1836                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1837                                 CAM_DEV_POS_PERIPH;
1838
1839                         cdm->pos.cookie.bus = periph->path->bus;
1840                         cdm->pos.generations[CAM_BUS_GENERATION]=
1841                                 xsoftc.bus_generation;
1842                         cdm->pos.cookie.target = periph->path->target;
1843                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1844                                 periph->path->bus->generation;
1845                         cdm->pos.cookie.device = periph->path->device;
1846                         cdm->pos.generations[CAM_DEV_GENERATION] =
1847                                 periph->path->target->generation;
1848                         cdm->pos.cookie.periph = periph;
1849                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1850                                 periph->path->device->generation;
1851                         cdm->status = CAM_DEV_MATCH_MORE;
1852                         return(0);
1853                 }
1854
1855                 j = cdm->num_matches;
1856                 cdm->num_matches++;
1857                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1858                 cdm->matches[j].result.periph_result.path_id =
1859                         periph->path->bus->path_id;
1860                 cdm->matches[j].result.periph_result.target_id =
1861                         periph->path->target->target_id;
1862                 cdm->matches[j].result.periph_result.target_lun =
1863                         periph->path->device->lun_id;
1864                 cdm->matches[j].result.periph_result.unit_number =
1865                         periph->unit_number;
1866                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1867                         periph->periph_name, DEV_IDLEN);
1868         }
1869
1870         return(1);
1871 }
1872
1873 static int
1874 xptedtmatch(struct ccb_dev_match *cdm)
1875 {
1876         struct cam_eb *bus;
1877         int ret;
1878
1879         cdm->num_matches = 0;
1880
1881         /*
1882          * Check the bus list generation.  If it has changed, the user
1883          * needs to reset everything and start over.
1884          */
1885         xpt_lock_buses();
1886         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1887          && (cdm->pos.cookie.bus != NULL)) {
1888                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1889                     xsoftc.bus_generation) {
1890                         xpt_unlock_buses();
1891                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1892                         return(0);
1893                 }
1894                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1895                 bus->refcount++;
1896         } else
1897                 bus = NULL;
1898         xpt_unlock_buses();
1899
1900         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1901
1902         /*
1903          * If we get back 0, that means that we had to stop before fully
1904          * traversing the EDT.  It also means that one of the subroutines
1905          * has set the status field to the proper value.  If we get back 1,
1906          * we've fully traversed the EDT and copied out any matching entries.
1907          */
1908         if (ret == 1)
1909                 cdm->status = CAM_DEV_MATCH_LAST;
1910
1911         return(ret);
1912 }
1913
1914 static int
1915 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1916 {
1917         struct cam_periph *periph;
1918         struct ccb_dev_match *cdm;
1919
1920         cdm = (struct ccb_dev_match *)arg;
1921
1922         xpt_lock_buses();
1923         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1924          && (cdm->pos.cookie.pdrv == pdrv)
1925          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1926          && (cdm->pos.cookie.periph != NULL)) {
1927                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1928                     (*pdrv)->generation) {
1929                         xpt_unlock_buses();
1930                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1931                         return(0);
1932                 }
1933                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1934                 periph->refcount++;
1935         } else
1936                 periph = NULL;
1937         xpt_unlock_buses();
1938
1939         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1940 }
1941
1942 static int
1943 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1944 {
1945         struct ccb_dev_match *cdm;
1946         dev_match_ret retval;
1947
1948         cdm = (struct ccb_dev_match *)arg;
1949
1950         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1951
1952         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1953                 cdm->status = CAM_DEV_MATCH_ERROR;
1954                 return(0);
1955         }
1956
1957         /*
1958          * If the copy flag is set, copy this peripheral out.
1959          */
1960         if (retval & DM_RET_COPY) {
1961                 int spaceleft, j;
1962
1963                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1964                         sizeof(struct dev_match_result));
1965
1966                 /*
1967                  * If we don't have enough space to put in another
1968                  * match result, save our position and tell the
1969                  * user there are more devices to check.
1970                  */
1971                 if (spaceleft < sizeof(struct dev_match_result)) {
1972                         struct periph_driver **pdrv;
1973
1974                         pdrv = NULL;
1975                         bzero(&cdm->pos, sizeof(cdm->pos));
1976                         cdm->pos.position_type =
1977                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1978                                 CAM_DEV_POS_PERIPH;
1979
1980                         /*
1981                          * This may look a bit non-sensical, but it is
1982                          * actually quite logical.  There are very few
1983                          * peripheral drivers, and bloating every peripheral
1984                          * structure with a pointer back to its parent
1985                          * peripheral driver linker set entry would cost
1986                          * more in the long run than doing this quick lookup.
1987                          */
1988                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1989                                 if (strcmp((*pdrv)->driver_name,
1990                                     periph->periph_name) == 0)
1991                                         break;
1992                         }
1993
1994                         if (*pdrv == NULL) {
1995                                 cdm->status = CAM_DEV_MATCH_ERROR;
1996                                 return(0);
1997                         }
1998
1999                         cdm->pos.cookie.pdrv = pdrv;
2000                         /*
2001                          * The periph generation slot does double duty, as
2002                          * does the periph pointer slot.  They are used for
2003                          * both edt and pdrv lookups and positioning.
2004                          */
2005                         cdm->pos.cookie.periph = periph;
2006                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2007                                 (*pdrv)->generation;
2008                         cdm->status = CAM_DEV_MATCH_MORE;
2009                         return(0);
2010                 }
2011
2012                 j = cdm->num_matches;
2013                 cdm->num_matches++;
2014                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2015                 cdm->matches[j].result.periph_result.path_id =
2016                         periph->path->bus->path_id;
2017
2018                 /*
2019                  * The transport layer peripheral doesn't have a target or
2020                  * lun.
2021                  */
2022                 if (periph->path->target)
2023                         cdm->matches[j].result.periph_result.target_id =
2024                                 periph->path->target->target_id;
2025                 else
2026                         cdm->matches[j].result.periph_result.target_id =
2027                                 CAM_TARGET_WILDCARD;
2028
2029                 if (periph->path->device)
2030                         cdm->matches[j].result.periph_result.target_lun =
2031                                 periph->path->device->lun_id;
2032                 else
2033                         cdm->matches[j].result.periph_result.target_lun =
2034                                 CAM_LUN_WILDCARD;
2035
2036                 cdm->matches[j].result.periph_result.unit_number =
2037                         periph->unit_number;
2038                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2039                         periph->periph_name, DEV_IDLEN);
2040         }
2041
2042         return(1);
2043 }
2044
2045 static int
2046 xptperiphlistmatch(struct ccb_dev_match *cdm)
2047 {
2048         int ret;
2049
2050         cdm->num_matches = 0;
2051
2052         /*
2053          * At this point in the edt traversal function, we check the bus
2054          * list generation to make sure that no busses have been added or
2055          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2056          * For the peripheral driver list traversal function, however, we
2057          * don't have to worry about new peripheral driver types coming or
2058          * going; they're in a linker set, and therefore can't change
2059          * without a recompile.
2060          */
2061
2062         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2063          && (cdm->pos.cookie.pdrv != NULL))
2064                 ret = xptpdrvtraverse(
2065                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2066                                 xptplistpdrvfunc, cdm);
2067         else
2068                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2069
2070         /*
2071          * If we get back 0, that means that we had to stop before fully
2072          * traversing the peripheral driver tree.  It also means that one of
2073          * the subroutines has set the status field to the proper value.  If
2074          * we get back 1, we've fully traversed the EDT and copied out any
2075          * matching entries.
2076          */
2077         if (ret == 1)
2078                 cdm->status = CAM_DEV_MATCH_LAST;
2079
2080         return(ret);
2081 }
2082
2083 static int
2084 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2085 {
2086         struct cam_eb *bus, *next_bus;
2087         int retval;
2088
2089         retval = 1;
2090         if (start_bus)
2091                 bus = start_bus;
2092         else {
2093                 xpt_lock_buses();
2094                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2095                 if (bus == NULL) {
2096                         xpt_unlock_buses();
2097                         return (retval);
2098                 }
2099                 bus->refcount++;
2100                 xpt_unlock_buses();
2101         }
2102         for (; bus != NULL; bus = next_bus) {
2103                 retval = tr_func(bus, arg);
2104                 if (retval == 0) {
2105                         xpt_release_bus(bus);
2106                         break;
2107                 }
2108                 xpt_lock_buses();
2109                 next_bus = TAILQ_NEXT(bus, links);
2110                 if (next_bus)
2111                         next_bus->refcount++;
2112                 xpt_unlock_buses();
2113                 xpt_release_bus(bus);
2114         }
2115         return(retval);
2116 }
2117
2118 static int
2119 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2120                   xpt_targetfunc_t *tr_func, void *arg)
2121 {
2122         struct cam_et *target, *next_target;
2123         int retval;
2124
2125         retval = 1;
2126         if (start_target)
2127                 target = start_target;
2128         else {
2129                 mtx_lock(&bus->eb_mtx);
2130                 target = TAILQ_FIRST(&bus->et_entries);
2131                 if (target == NULL) {
2132                         mtx_unlock(&bus->eb_mtx);
2133                         return (retval);
2134                 }
2135                 target->refcount++;
2136                 mtx_unlock(&bus->eb_mtx);
2137         }
2138         for (; target != NULL; target = next_target) {
2139                 retval = tr_func(target, arg);
2140                 if (retval == 0) {
2141                         xpt_release_target(target);
2142                         break;
2143                 }
2144                 mtx_lock(&bus->eb_mtx);
2145                 next_target = TAILQ_NEXT(target, links);
2146                 if (next_target)
2147                         next_target->refcount++;
2148                 mtx_unlock(&bus->eb_mtx);
2149                 xpt_release_target(target);
2150         }
2151         return(retval);
2152 }
2153
2154 static int
2155 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2156                   xpt_devicefunc_t *tr_func, void *arg)
2157 {
2158         struct cam_eb *bus;
2159         struct cam_ed *device, *next_device;
2160         int retval;
2161
2162         retval = 1;
2163         bus = target->bus;
2164         if (start_device)
2165                 device = start_device;
2166         else {
2167                 mtx_lock(&bus->eb_mtx);
2168                 device = TAILQ_FIRST(&target->ed_entries);
2169                 if (device == NULL) {
2170                         mtx_unlock(&bus->eb_mtx);
2171                         return (retval);
2172                 }
2173                 device->refcount++;
2174                 mtx_unlock(&bus->eb_mtx);
2175         }
2176         for (; device != NULL; device = next_device) {
2177                 mtx_lock(&device->device_mtx);
2178                 retval = tr_func(device, arg);
2179                 mtx_unlock(&device->device_mtx);
2180                 if (retval == 0) {
2181                         xpt_release_device(device);
2182                         break;
2183                 }
2184                 mtx_lock(&bus->eb_mtx);
2185                 next_device = TAILQ_NEXT(device, links);
2186                 if (next_device)
2187                         next_device->refcount++;
2188                 mtx_unlock(&bus->eb_mtx);
2189                 xpt_release_device(device);
2190         }
2191         return(retval);
2192 }
2193
2194 static int
2195 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2196                   xpt_periphfunc_t *tr_func, void *arg)
2197 {
2198         struct cam_eb *bus;
2199         struct cam_periph *periph, *next_periph;
2200         int retval;
2201
2202         retval = 1;
2203
2204         bus = device->target->bus;
2205         if (start_periph)
2206                 periph = start_periph;
2207         else {
2208                 xpt_lock_buses();
2209                 mtx_lock(&bus->eb_mtx);
2210                 periph = SLIST_FIRST(&device->periphs);
2211                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2212                         periph = SLIST_NEXT(periph, periph_links);
2213                 if (periph == NULL) {
2214                         mtx_unlock(&bus->eb_mtx);
2215                         xpt_unlock_buses();
2216                         return (retval);
2217                 }
2218                 periph->refcount++;
2219                 mtx_unlock(&bus->eb_mtx);
2220                 xpt_unlock_buses();
2221         }
2222         for (; periph != NULL; periph = next_periph) {
2223                 retval = tr_func(periph, arg);
2224                 if (retval == 0) {
2225                         cam_periph_release_locked(periph);
2226                         break;
2227                 }
2228                 xpt_lock_buses();
2229                 mtx_lock(&bus->eb_mtx);
2230                 next_periph = SLIST_NEXT(periph, periph_links);
2231                 while (next_periph != NULL &&
2232                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2233                         next_periph = SLIST_NEXT(next_periph, periph_links);
2234                 if (next_periph)
2235                         next_periph->refcount++;
2236                 mtx_unlock(&bus->eb_mtx);
2237                 xpt_unlock_buses();
2238                 cam_periph_release_locked(periph);
2239         }
2240         return(retval);
2241 }
2242
2243 static int
2244 xptpdrvtraverse(struct periph_driver **start_pdrv,
2245                 xpt_pdrvfunc_t *tr_func, void *arg)
2246 {
2247         struct periph_driver **pdrv;
2248         int retval;
2249
2250         retval = 1;
2251
2252         /*
2253          * We don't traverse the peripheral driver list like we do the
2254          * other lists, because it is a linker set, and therefore cannot be
2255          * changed during runtime.  If the peripheral driver list is ever
2256          * re-done to be something other than a linker set (i.e. it can
2257          * change while the system is running), the list traversal should
2258          * be modified to work like the other traversal functions.
2259          */
2260         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2261              *pdrv != NULL; pdrv++) {
2262                 retval = tr_func(pdrv, arg);
2263
2264                 if (retval == 0)
2265                         return(retval);
2266         }
2267
2268         return(retval);
2269 }
2270
2271 static int
2272 xptpdperiphtraverse(struct periph_driver **pdrv,
2273                     struct cam_periph *start_periph,
2274                     xpt_periphfunc_t *tr_func, void *arg)
2275 {
2276         struct cam_periph *periph, *next_periph;
2277         int retval;
2278
2279         retval = 1;
2280
2281         if (start_periph)
2282                 periph = start_periph;
2283         else {
2284                 xpt_lock_buses();
2285                 periph = TAILQ_FIRST(&(*pdrv)->units);
2286                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2287                         periph = TAILQ_NEXT(periph, unit_links);
2288                 if (periph == NULL) {
2289                         xpt_unlock_buses();
2290                         return (retval);
2291                 }
2292                 periph->refcount++;
2293                 xpt_unlock_buses();
2294         }
2295         for (; periph != NULL; periph = next_periph) {
2296                 cam_periph_lock(periph);
2297                 retval = tr_func(periph, arg);
2298                 cam_periph_unlock(periph);
2299                 if (retval == 0) {
2300                         cam_periph_release(periph);
2301                         break;
2302                 }
2303                 xpt_lock_buses();
2304                 next_periph = TAILQ_NEXT(periph, unit_links);
2305                 while (next_periph != NULL &&
2306                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2307                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2308                 if (next_periph)
2309                         next_periph->refcount++;
2310                 xpt_unlock_buses();
2311                 cam_periph_release(periph);
2312         }
2313         return(retval);
2314 }
2315
2316 static int
2317 xptdefbusfunc(struct cam_eb *bus, void *arg)
2318 {
2319         struct xpt_traverse_config *tr_config;
2320
2321         tr_config = (struct xpt_traverse_config *)arg;
2322
2323         if (tr_config->depth == XPT_DEPTH_BUS) {
2324                 xpt_busfunc_t *tr_func;
2325
2326                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2327
2328                 return(tr_func(bus, tr_config->tr_arg));
2329         } else
2330                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2331 }
2332
2333 static int
2334 xptdeftargetfunc(struct cam_et *target, void *arg)
2335 {
2336         struct xpt_traverse_config *tr_config;
2337
2338         tr_config = (struct xpt_traverse_config *)arg;
2339
2340         if (tr_config->depth == XPT_DEPTH_TARGET) {
2341                 xpt_targetfunc_t *tr_func;
2342
2343                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2344
2345                 return(tr_func(target, tr_config->tr_arg));
2346         } else
2347                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2348 }
2349
2350 static int
2351 xptdefdevicefunc(struct cam_ed *device, void *arg)
2352 {
2353         struct xpt_traverse_config *tr_config;
2354
2355         tr_config = (struct xpt_traverse_config *)arg;
2356
2357         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2358                 xpt_devicefunc_t *tr_func;
2359
2360                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2361
2362                 return(tr_func(device, tr_config->tr_arg));
2363         } else
2364                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2365 }
2366
2367 static int
2368 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2369 {
2370         struct xpt_traverse_config *tr_config;
2371         xpt_periphfunc_t *tr_func;
2372
2373         tr_config = (struct xpt_traverse_config *)arg;
2374
2375         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2376
2377         /*
2378          * Unlike the other default functions, we don't check for depth
2379          * here.  The peripheral driver level is the last level in the EDT,
2380          * so if we're here, we should execute the function in question.
2381          */
2382         return(tr_func(periph, tr_config->tr_arg));
2383 }
2384
2385 /*
2386  * Execute the given function for every bus in the EDT.
2387  */
2388 static int
2389 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2390 {
2391         struct xpt_traverse_config tr_config;
2392
2393         tr_config.depth = XPT_DEPTH_BUS;
2394         tr_config.tr_func = tr_func;
2395         tr_config.tr_arg = arg;
2396
2397         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2398 }
2399
2400 /*
2401  * Execute the given function for every device in the EDT.
2402  */
2403 static int
2404 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2405 {
2406         struct xpt_traverse_config tr_config;
2407
2408         tr_config.depth = XPT_DEPTH_DEVICE;
2409         tr_config.tr_func = tr_func;
2410         tr_config.tr_arg = arg;
2411
2412         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2413 }
2414
2415 static int
2416 xptsetasyncfunc(struct cam_ed *device, void *arg)
2417 {
2418         struct cam_path path;
2419         struct ccb_getdev cgd;
2420         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2421
2422         /*
2423          * Don't report unconfigured devices (Wildcard devs,
2424          * devices only for target mode, device instances
2425          * that have been invalidated but are waiting for
2426          * their last reference count to be released).
2427          */
2428         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2429                 return (1);
2430
2431         xpt_compile_path(&path,
2432                          NULL,
2433                          device->target->bus->path_id,
2434                          device->target->target_id,
2435                          device->lun_id);
2436         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2437         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2438         xpt_action((union ccb *)&cgd);
2439         csa->callback(csa->callback_arg,
2440                             AC_FOUND_DEVICE,
2441                             &path, &cgd);
2442         xpt_release_path(&path);
2443
2444         return(1);
2445 }
2446
2447 static int
2448 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2449 {
2450         struct cam_path path;
2451         struct ccb_pathinq cpi;
2452         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2453
2454         xpt_compile_path(&path, /*periph*/NULL,
2455                          bus->path_id,
2456                          CAM_TARGET_WILDCARD,
2457                          CAM_LUN_WILDCARD);
2458         xpt_path_lock(&path);
2459         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2460         cpi.ccb_h.func_code = XPT_PATH_INQ;
2461         xpt_action((union ccb *)&cpi);
2462         csa->callback(csa->callback_arg,
2463                             AC_PATH_REGISTERED,
2464                             &path, &cpi);
2465         xpt_path_unlock(&path);
2466         xpt_release_path(&path);
2467
2468         return(1);
2469 }
2470
2471 void
2472 xpt_action(union ccb *start_ccb)
2473 {
2474
2475         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2476
2477         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2478         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2479 }
2480
2481 void
2482 xpt_action_default(union ccb *start_ccb)
2483 {
2484         struct cam_path *path;
2485         struct cam_sim *sim;
2486         struct mtx *mtx;
2487
2488         path = start_ccb->ccb_h.path;
2489         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2490
2491         switch (start_ccb->ccb_h.func_code) {
2492         case XPT_SCSI_IO:
2493         {
2494                 struct cam_ed *device;
2495
2496                 /*
2497                  * For the sake of compatibility with SCSI-1
2498                  * devices that may not understand the identify
2499                  * message, we include lun information in the
2500                  * second byte of all commands.  SCSI-1 specifies
2501                  * that luns are a 3 bit value and reserves only 3
2502                  * bits for lun information in the CDB.  Later
2503                  * revisions of the SCSI spec allow for more than 8
2504                  * luns, but have deprecated lun information in the
2505                  * CDB.  So, if the lun won't fit, we must omit.
2506                  *
2507                  * Also be aware that during initial probing for devices,
2508                  * the inquiry information is unknown but initialized to 0.
2509                  * This means that this code will be exercised while probing
2510                  * devices with an ANSI revision greater than 2.
2511                  */
2512                 device = path->device;
2513                 if (device->protocol_version <= SCSI_REV_2
2514                  && start_ccb->ccb_h.target_lun < 8
2515                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2516
2517                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2518                             start_ccb->ccb_h.target_lun << 5;
2519                 }
2520                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2521         }
2522         /* FALLTHROUGH */
2523         case XPT_TARGET_IO:
2524         case XPT_CONT_TARGET_IO:
2525                 start_ccb->csio.sense_resid = 0;
2526                 start_ccb->csio.resid = 0;
2527                 /* FALLTHROUGH */
2528         case XPT_ATA_IO:
2529                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2530                         start_ccb->ataio.resid = 0;
2531                 /* FALLTHROUGH */
2532         case XPT_RESET_DEV:
2533         case XPT_ENG_EXEC:
2534         case XPT_SMP_IO:
2535         {
2536                 struct cam_devq *devq;
2537
2538                 devq = path->bus->sim->devq;
2539                 mtx_lock(&devq->send_mtx);
2540                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2541                 if (xpt_schedule_devq(devq, path->device) != 0)
2542                         xpt_run_devq(devq);
2543                 mtx_unlock(&devq->send_mtx);
2544                 break;
2545         }
2546         case XPT_CALC_GEOMETRY:
2547                 /* Filter out garbage */
2548                 if (start_ccb->ccg.block_size == 0
2549                  || start_ccb->ccg.volume_size == 0) {
2550                         start_ccb->ccg.cylinders = 0;
2551                         start_ccb->ccg.heads = 0;
2552                         start_ccb->ccg.secs_per_track = 0;
2553                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2554                         break;
2555                 }
2556 #if defined(PC98) || defined(__sparc64__)
2557                 /*
2558                  * In a PC-98 system, geometry translation depens on
2559                  * the "real" device geometry obtained from mode page 4.
2560                  * SCSI geometry translation is performed in the
2561                  * initialization routine of the SCSI BIOS and the result
2562                  * stored in host memory.  If the translation is available
2563                  * in host memory, use it.  If not, rely on the default
2564                  * translation the device driver performs.
2565                  * For sparc64, we may need adjust the geometry of large
2566                  * disks in order to fit the limitations of the 16-bit
2567                  * fields of the VTOC8 disk label.
2568                  */
2569                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2570                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2571                         break;
2572                 }
2573 #endif
2574                 goto call_sim;
2575         case XPT_ABORT:
2576         {
2577                 union ccb* abort_ccb;
2578
2579                 abort_ccb = start_ccb->cab.abort_ccb;
2580                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2581
2582                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2583                                 struct cam_ccbq *ccbq;
2584                                 struct cam_ed *device;
2585
2586                                 device = abort_ccb->ccb_h.path->device;
2587                                 ccbq = &device->ccbq;
2588                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2589                                 abort_ccb->ccb_h.status =
2590                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2591                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2592                                 xpt_done(abort_ccb);
2593                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2594                                 break;
2595                         }
2596                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2597                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2598                                 /*
2599                                  * We've caught this ccb en route to
2600                                  * the SIM.  Flag it for abort and the
2601                                  * SIM will do so just before starting
2602                                  * real work on the CCB.
2603                                  */
2604                                 abort_ccb->ccb_h.status =
2605                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2606                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2607                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2608                                 break;
2609                         }
2610                 }
2611                 if (XPT_FC_IS_QUEUED(abort_ccb)
2612                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2613                         /*
2614                          * It's already completed but waiting
2615                          * for our SWI to get to it.
2616                          */
2617                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2618                         break;
2619                 }
2620                 /*
2621                  * If we weren't able to take care of the abort request
2622                  * in the XPT, pass the request down to the SIM for processing.
2623                  */
2624         }
2625         /* FALLTHROUGH */
2626         case XPT_ACCEPT_TARGET_IO:
2627         case XPT_EN_LUN:
2628         case XPT_IMMED_NOTIFY:
2629         case XPT_NOTIFY_ACK:
2630         case XPT_RESET_BUS:
2631         case XPT_IMMEDIATE_NOTIFY:
2632         case XPT_NOTIFY_ACKNOWLEDGE:
2633         case XPT_GET_SIM_KNOB:
2634         case XPT_SET_SIM_KNOB:
2635         case XPT_GET_TRAN_SETTINGS:
2636         case XPT_SET_TRAN_SETTINGS:
2637         case XPT_PATH_INQ:
2638 call_sim:
2639                 sim = path->bus->sim;
2640                 mtx = sim->mtx;
2641                 if (mtx && !mtx_owned(mtx))
2642                         mtx_lock(mtx);
2643                 else
2644                         mtx = NULL;
2645                 (*(sim->sim_action))(sim, start_ccb);
2646                 if (mtx)
2647                         mtx_unlock(mtx);
2648                 break;
2649         case XPT_PATH_STATS:
2650                 start_ccb->cpis.last_reset = path->bus->last_reset;
2651                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2652                 break;
2653         case XPT_GDEV_TYPE:
2654         {
2655                 struct cam_ed *dev;
2656
2657                 dev = path->device;
2658                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2659                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2660                 } else {
2661                         struct ccb_getdev *cgd;
2662
2663                         cgd = &start_ccb->cgd;
2664                         cgd->protocol = dev->protocol;
2665                         cgd->inq_data = dev->inq_data;
2666                         cgd->ident_data = dev->ident_data;
2667                         cgd->inq_flags = dev->inq_flags;
2668                         cgd->ccb_h.status = CAM_REQ_CMP;
2669                         cgd->serial_num_len = dev->serial_num_len;
2670                         if ((dev->serial_num_len > 0)
2671                          && (dev->serial_num != NULL))
2672                                 bcopy(dev->serial_num, cgd->serial_num,
2673                                       dev->serial_num_len);
2674                 }
2675                 break;
2676         }
2677         case XPT_GDEV_STATS:
2678         {
2679                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2680                 struct cam_ed *dev = path->device;
2681                 struct cam_eb *bus = path->bus;
2682                 struct cam_et *tar = path->target;
2683                 struct cam_devq *devq = bus->sim->devq;
2684
2685                 mtx_lock(&devq->send_mtx);
2686                 cgds->dev_openings = dev->ccbq.dev_openings;
2687                 cgds->dev_active = dev->ccbq.dev_active;
2688                 cgds->allocated = dev->ccbq.allocated;
2689                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2690                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2691                 cgds->last_reset = tar->last_reset;
2692                 cgds->maxtags = dev->maxtags;
2693                 cgds->mintags = dev->mintags;
2694                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2695                         cgds->last_reset = bus->last_reset;
2696                 mtx_unlock(&devq->send_mtx);
2697                 cgds->ccb_h.status = CAM_REQ_CMP;
2698                 break;
2699         }
2700         case XPT_GDEVLIST:
2701         {
2702                 struct cam_periph       *nperiph;
2703                 struct periph_list      *periph_head;
2704                 struct ccb_getdevlist   *cgdl;
2705                 u_int                   i;
2706                 struct cam_ed           *device;
2707                 int                     found;
2708
2709
2710                 found = 0;
2711
2712                 /*
2713                  * Don't want anyone mucking with our data.
2714                  */
2715                 device = path->device;
2716                 periph_head = &device->periphs;
2717                 cgdl = &start_ccb->cgdl;
2718
2719                 /*
2720                  * Check and see if the list has changed since the user
2721                  * last requested a list member.  If so, tell them that the
2722                  * list has changed, and therefore they need to start over
2723                  * from the beginning.
2724                  */
2725                 if ((cgdl->index != 0) &&
2726                     (cgdl->generation != device->generation)) {
2727                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2728                         break;
2729                 }
2730
2731                 /*
2732                  * Traverse the list of peripherals and attempt to find
2733                  * the requested peripheral.
2734                  */
2735                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2736                      (nperiph != NULL) && (i <= cgdl->index);
2737                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2738                         if (i == cgdl->index) {
2739                                 strncpy(cgdl->periph_name,
2740                                         nperiph->periph_name,
2741                                         DEV_IDLEN);
2742                                 cgdl->unit_number = nperiph->unit_number;
2743                                 found = 1;
2744                         }
2745                 }
2746                 if (found == 0) {
2747                         cgdl->status = CAM_GDEVLIST_ERROR;
2748                         break;
2749                 }
2750
2751                 if (nperiph == NULL)
2752                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2753                 else
2754                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2755
2756                 cgdl->index++;
2757                 cgdl->generation = device->generation;
2758
2759                 cgdl->ccb_h.status = CAM_REQ_CMP;
2760                 break;
2761         }
2762         case XPT_DEV_MATCH:
2763         {
2764                 dev_pos_type position_type;
2765                 struct ccb_dev_match *cdm;
2766
2767                 cdm = &start_ccb->cdm;
2768
2769                 /*
2770                  * There are two ways of getting at information in the EDT.
2771                  * The first way is via the primary EDT tree.  It starts
2772                  * with a list of busses, then a list of targets on a bus,
2773                  * then devices/luns on a target, and then peripherals on a
2774                  * device/lun.  The "other" way is by the peripheral driver
2775                  * lists.  The peripheral driver lists are organized by
2776                  * peripheral driver.  (obviously)  So it makes sense to
2777                  * use the peripheral driver list if the user is looking
2778                  * for something like "da1", or all "da" devices.  If the
2779                  * user is looking for something on a particular bus/target
2780                  * or lun, it's generally better to go through the EDT tree.
2781                  */
2782
2783                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2784                         position_type = cdm->pos.position_type;
2785                 else {
2786                         u_int i;
2787
2788                         position_type = CAM_DEV_POS_NONE;
2789
2790                         for (i = 0; i < cdm->num_patterns; i++) {
2791                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2792                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2793                                         position_type = CAM_DEV_POS_EDT;
2794                                         break;
2795                                 }
2796                         }
2797
2798                         if (cdm->num_patterns == 0)
2799                                 position_type = CAM_DEV_POS_EDT;
2800                         else if (position_type == CAM_DEV_POS_NONE)
2801                                 position_type = CAM_DEV_POS_PDRV;
2802                 }
2803
2804                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2805                 case CAM_DEV_POS_EDT:
2806                         xptedtmatch(cdm);
2807                         break;
2808                 case CAM_DEV_POS_PDRV:
2809                         xptperiphlistmatch(cdm);
2810                         break;
2811                 default:
2812                         cdm->status = CAM_DEV_MATCH_ERROR;
2813                         break;
2814                 }
2815
2816                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2817                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2818                 else
2819                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2820
2821                 break;
2822         }
2823         case XPT_SASYNC_CB:
2824         {
2825                 struct ccb_setasync *csa;
2826                 struct async_node *cur_entry;
2827                 struct async_list *async_head;
2828                 u_int32_t added;
2829
2830                 csa = &start_ccb->csa;
2831                 added = csa->event_enable;
2832                 async_head = &path->device->asyncs;
2833
2834                 /*
2835                  * If there is already an entry for us, simply
2836                  * update it.
2837                  */
2838                 cur_entry = SLIST_FIRST(async_head);
2839                 while (cur_entry != NULL) {
2840                         if ((cur_entry->callback_arg == csa->callback_arg)
2841                          && (cur_entry->callback == csa->callback))
2842                                 break;
2843                         cur_entry = SLIST_NEXT(cur_entry, links);
2844                 }
2845
2846                 if (cur_entry != NULL) {
2847                         /*
2848                          * If the request has no flags set,
2849                          * remove the entry.
2850                          */
2851                         added &= ~cur_entry->event_enable;
2852                         if (csa->event_enable == 0) {
2853                                 SLIST_REMOVE(async_head, cur_entry,
2854                                              async_node, links);
2855                                 xpt_release_device(path->device);
2856                                 free(cur_entry, M_CAMXPT);
2857                         } else {
2858                                 cur_entry->event_enable = csa->event_enable;
2859                         }
2860                         csa->event_enable = added;
2861                 } else {
2862                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2863                                            M_NOWAIT);
2864                         if (cur_entry == NULL) {
2865                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2866                                 break;
2867                         }
2868                         cur_entry->event_enable = csa->event_enable;
2869                         cur_entry->event_lock = (path->bus->sim->mtx &&
2870                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
2871                         cur_entry->callback_arg = csa->callback_arg;
2872                         cur_entry->callback = csa->callback;
2873                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2874                         xpt_acquire_device(path->device);
2875                 }
2876                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2877                 break;
2878         }
2879         case XPT_REL_SIMQ:
2880         {
2881                 struct ccb_relsim *crs;
2882                 struct cam_ed *dev;
2883
2884                 crs = &start_ccb->crs;
2885                 dev = path->device;
2886                 if (dev == NULL) {
2887
2888                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2889                         break;
2890                 }
2891
2892                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2893
2894                         /* Don't ever go below one opening */
2895                         if (crs->openings > 0) {
2896                                 xpt_dev_ccbq_resize(path, crs->openings);
2897                                 if (bootverbose) {
2898                                         xpt_print(path,
2899                                             "number of openings is now %d\n",
2900                                             crs->openings);
2901                                 }
2902                         }
2903                 }
2904
2905                 mtx_lock(&dev->sim->devq->send_mtx);
2906                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2907
2908                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2909
2910                                 /*
2911                                  * Just extend the old timeout and decrement
2912                                  * the freeze count so that a single timeout
2913                                  * is sufficient for releasing the queue.
2914                                  */
2915                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2916                                 callout_stop(&dev->callout);
2917                         } else {
2918
2919                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2920                         }
2921
2922                         callout_reset_sbt(&dev->callout,
2923                             SBT_1MS * crs->release_timeout, 0,
2924                             xpt_release_devq_timeout, dev, 0);
2925
2926                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2927
2928                 }
2929
2930                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2931
2932                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2933                                 /*
2934                                  * Decrement the freeze count so that a single
2935                                  * completion is still sufficient to unfreeze
2936                                  * the queue.
2937                                  */
2938                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2939                         } else {
2940
2941                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2942                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2943                         }
2944                 }
2945
2946                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2947
2948                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2949                          || (dev->ccbq.dev_active == 0)) {
2950
2951                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2952                         } else {
2953
2954                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2955                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2956                         }
2957                 }
2958                 mtx_unlock(&dev->sim->devq->send_mtx);
2959
2960                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2961                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2962                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2963                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2964                 break;
2965         }
2966         case XPT_DEBUG: {
2967                 struct cam_path *oldpath;
2968
2969                 /* Check that all request bits are supported. */
2970                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2971                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2972                         break;
2973                 }
2974
2975                 cam_dflags = CAM_DEBUG_NONE;
2976                 if (cam_dpath != NULL) {
2977                         oldpath = cam_dpath;
2978                         cam_dpath = NULL;
2979                         xpt_free_path(oldpath);
2980                 }
2981                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2982                         if (xpt_create_path(&cam_dpath, NULL,
2983                                             start_ccb->ccb_h.path_id,
2984                                             start_ccb->ccb_h.target_id,
2985                                             start_ccb->ccb_h.target_lun) !=
2986                                             CAM_REQ_CMP) {
2987                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2988                         } else {
2989                                 cam_dflags = start_ccb->cdbg.flags;
2990                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2991                                 xpt_print(cam_dpath, "debugging flags now %x\n",
2992                                     cam_dflags);
2993                         }
2994                 } else
2995                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2996                 break;
2997         }
2998         case XPT_NOOP:
2999                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3000                         xpt_freeze_devq(path, 1);
3001                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3002                 break;
3003         case XPT_REPROBE_LUN:
3004                 xpt_async(AC_INQ_CHANGED, path, NULL);
3005                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3006                 xpt_done(start_ccb);
3007                 break;
3008         default:
3009         case XPT_SDEV_TYPE:
3010         case XPT_TERM_IO:
3011         case XPT_ENG_INQ:
3012                 /* XXX Implement */
3013                 printf("%s: CCB type %#x not supported\n", __func__,
3014                        start_ccb->ccb_h.func_code);
3015                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3016                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3017                         xpt_done(start_ccb);
3018                 }
3019                 break;
3020         }
3021 }
3022
3023 void
3024 xpt_polled_action(union ccb *start_ccb)
3025 {
3026         u_int32_t timeout;
3027         struct    cam_sim *sim;
3028         struct    cam_devq *devq;
3029         struct    cam_ed *dev;
3030         struct mtx *mtx;
3031
3032         timeout = start_ccb->ccb_h.timeout * 10;
3033         sim = start_ccb->ccb_h.path->bus->sim;
3034         devq = sim->devq;
3035         mtx = sim->mtx;
3036         dev = start_ccb->ccb_h.path->device;
3037
3038         mtx_unlock(&dev->device_mtx);
3039
3040         /*
3041          * Steal an opening so that no other queued requests
3042          * can get it before us while we simulate interrupts.
3043          */
3044         mtx_lock(&devq->send_mtx);
3045         dev->ccbq.dev_openings--;
3046         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3047             (--timeout > 0)) {
3048                 mtx_unlock(&devq->send_mtx);
3049                 DELAY(100);
3050                 if (mtx)
3051                         mtx_lock(mtx);
3052                 (*(sim->sim_poll))(sim);
3053                 if (mtx)
3054                         mtx_unlock(mtx);
3055                 camisr_runqueue();
3056                 mtx_lock(&devq->send_mtx);
3057         }
3058         dev->ccbq.dev_openings++;
3059         mtx_unlock(&devq->send_mtx);
3060
3061         if (timeout != 0) {
3062                 xpt_action(start_ccb);
3063                 while(--timeout > 0) {
3064                         if (mtx)
3065                                 mtx_lock(mtx);
3066                         (*(sim->sim_poll))(sim);
3067                         if (mtx)
3068                                 mtx_unlock(mtx);
3069                         camisr_runqueue();
3070                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3071                             != CAM_REQ_INPROG)
3072                                 break;
3073                         DELAY(100);
3074                 }
3075                 if (timeout == 0) {
3076                         /*
3077                          * XXX Is it worth adding a sim_timeout entry
3078                          * point so we can attempt recovery?  If
3079                          * this is only used for dumps, I don't think
3080                          * it is.
3081                          */
3082                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3083                 }
3084         } else {
3085                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3086         }
3087
3088         mtx_lock(&dev->device_mtx);
3089 }
3090
3091 /*
3092  * Schedule a peripheral driver to receive a ccb when its
3093  * target device has space for more transactions.
3094  */
3095 void
3096 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3097 {
3098
3099         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3100         cam_periph_assert(periph, MA_OWNED);
3101         if (new_priority < periph->scheduled_priority) {
3102                 periph->scheduled_priority = new_priority;
3103                 xpt_run_allocq(periph, 0);
3104         }
3105 }
3106
3107
3108 /*
3109  * Schedule a device to run on a given queue.
3110  * If the device was inserted as a new entry on the queue,
3111  * return 1 meaning the device queue should be run. If we
3112  * were already queued, implying someone else has already
3113  * started the queue, return 0 so the caller doesn't attempt
3114  * to run the queue.
3115  */
3116 static int
3117 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3118                  u_int32_t new_priority)
3119 {
3120         int retval;
3121         u_int32_t old_priority;
3122
3123         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3124
3125         old_priority = pinfo->priority;
3126
3127         /*
3128          * Are we already queued?
3129          */
3130         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3131                 /* Simply reorder based on new priority */
3132                 if (new_priority < old_priority) {
3133                         camq_change_priority(queue, pinfo->index,
3134                                              new_priority);
3135                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3136                                         ("changed priority to %d\n",
3137                                          new_priority));
3138                         retval = 1;
3139                 } else
3140                         retval = 0;
3141         } else {
3142                 /* New entry on the queue */
3143                 if (new_priority < old_priority)
3144                         pinfo->priority = new_priority;
3145
3146                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3147                                 ("Inserting onto queue\n"));
3148                 pinfo->generation = ++queue->generation;
3149                 camq_insert(queue, pinfo);
3150                 retval = 1;
3151         }
3152         return (retval);
3153 }
3154
3155 static void
3156 xpt_run_allocq_task(void *context, int pending)
3157 {
3158         struct cam_periph *periph = context;
3159
3160         cam_periph_lock(periph);
3161         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3162         xpt_run_allocq(periph, 1);
3163         cam_periph_unlock(periph);
3164         cam_periph_release(periph);
3165 }
3166
3167 static void
3168 xpt_run_allocq(struct cam_periph *periph, int sleep)
3169 {
3170         struct cam_ed   *device;
3171         union ccb       *ccb;
3172         uint32_t         prio;
3173
3174         cam_periph_assert(periph, MA_OWNED);
3175         if (periph->periph_allocating)
3176                 return;
3177         periph->periph_allocating = 1;
3178         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3179         device = periph->path->device;
3180         ccb = NULL;
3181 restart:
3182         while ((prio = min(periph->scheduled_priority,
3183             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3184             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3185              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3186
3187                 if (ccb == NULL &&
3188                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3189                         if (sleep) {
3190                                 ccb = xpt_get_ccb(periph);
3191                                 goto restart;
3192                         }
3193                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3194                                 break;
3195                         cam_periph_doacquire(periph);
3196                         periph->flags |= CAM_PERIPH_RUN_TASK;
3197                         taskqueue_enqueue(xsoftc.xpt_taskq,
3198                             &periph->periph_run_task);
3199                         break;
3200                 }
3201                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3202                 if (prio == periph->immediate_priority) {
3203                         periph->immediate_priority = CAM_PRIORITY_NONE;
3204                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3205                                         ("waking cam_periph_getccb()\n"));
3206                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3207                                           periph_links.sle);
3208                         wakeup(&periph->ccb_list);
3209                 } else {
3210                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3211                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3212                                         ("calling periph_start()\n"));
3213                         periph->periph_start(periph, ccb);
3214                 }
3215                 ccb = NULL;
3216         }
3217         if (ccb != NULL)
3218                 xpt_release_ccb(ccb);
3219         periph->periph_allocating = 0;
3220 }
3221
3222 static void
3223 xpt_run_devq(struct cam_devq *devq)
3224 {
3225         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3226         struct mtx *mtx;
3227
3228         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3229
3230         devq->send_queue.qfrozen_cnt++;
3231         while ((devq->send_queue.entries > 0)
3232             && (devq->send_openings > 0)
3233             && (devq->send_queue.qfrozen_cnt <= 1)) {
3234                 struct  cam_ed *device;
3235                 union ccb *work_ccb;
3236                 struct  cam_sim *sim;
3237
3238                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3239                                                            CAMQ_HEAD);
3240                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3241                                 ("running device %p\n", device));
3242
3243                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3244                 if (work_ccb == NULL) {
3245                         printf("device on run queue with no ccbs???\n");
3246                         continue;
3247                 }
3248
3249                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3250
3251                         mtx_lock(&xsoftc.xpt_highpower_lock);
3252                         if (xsoftc.num_highpower <= 0) {
3253                                 /*
3254                                  * We got a high power command, but we
3255                                  * don't have any available slots.  Freeze
3256                                  * the device queue until we have a slot
3257                                  * available.
3258                                  */
3259                                 xpt_freeze_devq_device(device, 1);
3260                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3261                                                    highpowerq_entry);
3262
3263                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3264                                 continue;
3265                         } else {
3266                                 /*
3267                                  * Consume a high power slot while
3268                                  * this ccb runs.
3269                                  */
3270                                 xsoftc.num_highpower--;
3271                         }
3272                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3273                 }
3274                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3275                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3276                 devq->send_openings--;
3277                 devq->send_active++;
3278                 xpt_schedule_devq(devq, device);
3279                 mtx_unlock(&devq->send_mtx);
3280
3281                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3282                         /*
3283                          * The client wants to freeze the queue
3284                          * after this CCB is sent.
3285                          */
3286                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3287                 }
3288
3289                 /* In Target mode, the peripheral driver knows best... */
3290                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3291                         if ((device->inq_flags & SID_CmdQue) != 0
3292                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3293                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3294                         else
3295                                 /*
3296                                  * Clear this in case of a retried CCB that
3297                                  * failed due to a rejected tag.
3298                                  */
3299                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3300                 }
3301
3302                 switch (work_ccb->ccb_h.func_code) {
3303                 case XPT_SCSI_IO:
3304                         CAM_DEBUG(work_ccb->ccb_h.path,
3305                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3306                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3307                                           &device->inq_data),
3308                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3309                                              cdb_str, sizeof(cdb_str))));
3310                         break;
3311                 case XPT_ATA_IO:
3312                         CAM_DEBUG(work_ccb->ccb_h.path,
3313                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3314                              ata_op_string(&work_ccb->ataio.cmd),
3315                              ata_cmd_string(&work_ccb->ataio.cmd,
3316                                             cdb_str, sizeof(cdb_str))));
3317                         break;
3318                 default:
3319                         break;
3320                 }
3321
3322                 /*
3323                  * Device queues can be shared among multiple SIM instances
3324                  * that reside on different busses.  Use the SIM from the
3325                  * queued device, rather than the one from the calling bus.
3326                  */
3327                 sim = device->sim;
3328                 mtx = sim->mtx;
3329                 if (mtx && !mtx_owned(mtx))
3330                         mtx_lock(mtx);
3331                 else
3332                         mtx = NULL;
3333                 (*(sim->sim_action))(sim, work_ccb);
3334                 if (mtx)
3335                         mtx_unlock(mtx);
3336                 mtx_lock(&devq->send_mtx);
3337         }
3338         devq->send_queue.qfrozen_cnt--;
3339 }
3340
3341 /*
3342  * This function merges stuff from the slave ccb into the master ccb, while
3343  * keeping important fields in the master ccb constant.
3344  */
3345 void
3346 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3347 {
3348
3349         /*
3350          * Pull fields that are valid for peripheral drivers to set
3351          * into the master CCB along with the CCB "payload".
3352          */
3353         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3354         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3355         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3356         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3357         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3358               sizeof(union ccb) - sizeof(struct ccb_hdr));
3359 }
3360
3361 void
3362 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3363                     u_int32_t priority, u_int32_t flags)
3364 {
3365
3366         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3367         ccb_h->pinfo.priority = priority;
3368         ccb_h->path = path;
3369         ccb_h->path_id = path->bus->path_id;
3370         if (path->target)
3371                 ccb_h->target_id = path->target->target_id;
3372         else
3373                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3374         if (path->device) {
3375                 ccb_h->target_lun = path->device->lun_id;
3376                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3377         } else {
3378                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3379         }
3380         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3381         ccb_h->flags = flags;
3382         ccb_h->xflags = 0;
3383 }
3384
3385 void
3386 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3387 {
3388         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3389 }
3390
3391 /* Path manipulation functions */
3392 cam_status
3393 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3394                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3395 {
3396         struct     cam_path *path;
3397         cam_status status;
3398
3399         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3400
3401         if (path == NULL) {
3402                 status = CAM_RESRC_UNAVAIL;
3403                 return(status);
3404         }
3405         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3406         if (status != CAM_REQ_CMP) {
3407                 free(path, M_CAMPATH);
3408                 path = NULL;
3409         }
3410         *new_path_ptr = path;
3411         return (status);
3412 }
3413
3414 cam_status
3415 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3416                          struct cam_periph *periph, path_id_t path_id,
3417                          target_id_t target_id, lun_id_t lun_id)
3418 {
3419
3420         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3421             lun_id));
3422 }
3423
3424 cam_status
3425 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3426                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3427 {
3428         struct       cam_eb *bus;
3429         struct       cam_et *target;
3430         struct       cam_ed *device;
3431         cam_status   status;
3432
3433         status = CAM_REQ_CMP;   /* Completed without error */
3434         target = NULL;          /* Wildcarded */
3435         device = NULL;          /* Wildcarded */
3436
3437         /*
3438          * We will potentially modify the EDT, so block interrupts
3439          * that may attempt to create cam paths.
3440          */
3441         bus = xpt_find_bus(path_id);
3442         if (bus == NULL) {
3443                 status = CAM_PATH_INVALID;
3444         } else {
3445                 xpt_lock_buses();
3446                 mtx_lock(&bus->eb_mtx);
3447                 target = xpt_find_target(bus, target_id);
3448                 if (target == NULL) {
3449                         /* Create one */
3450                         struct cam_et *new_target;
3451
3452                         new_target = xpt_alloc_target(bus, target_id);
3453                         if (new_target == NULL) {
3454                                 status = CAM_RESRC_UNAVAIL;
3455                         } else {
3456                                 target = new_target;
3457                         }
3458                 }
3459                 xpt_unlock_buses();
3460                 if (target != NULL) {
3461                         device = xpt_find_device(target, lun_id);
3462                         if (device == NULL) {
3463                                 /* Create one */
3464                                 struct cam_ed *new_device;
3465
3466                                 new_device =
3467                                     (*(bus->xport->alloc_device))(bus,
3468                                                                       target,
3469                                                                       lun_id);
3470                                 if (new_device == NULL) {
3471                                         status = CAM_RESRC_UNAVAIL;
3472                                 } else {
3473                                         device = new_device;
3474                                 }
3475                         }
3476                 }
3477                 mtx_unlock(&bus->eb_mtx);
3478         }
3479
3480         /*
3481          * Only touch the user's data if we are successful.
3482          */
3483         if (status == CAM_REQ_CMP) {
3484                 new_path->periph = perph;
3485                 new_path->bus = bus;
3486                 new_path->target = target;
3487                 new_path->device = device;
3488                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3489         } else {
3490                 if (device != NULL)
3491                         xpt_release_device(device);
3492                 if (target != NULL)
3493                         xpt_release_target(target);
3494                 if (bus != NULL)
3495                         xpt_release_bus(bus);
3496         }
3497         return (status);
3498 }
3499
3500 cam_status
3501 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3502 {
3503         struct     cam_path *new_path;
3504
3505         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3506         if (new_path == NULL)
3507                 return(CAM_RESRC_UNAVAIL);
3508         xpt_copy_path(new_path, path);
3509         *new_path_ptr = new_path;
3510         return (CAM_REQ_CMP);
3511 }
3512
3513 void
3514 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3515 {
3516
3517         *new_path = *path;
3518         if (path->bus != NULL)
3519                 xpt_acquire_bus(path->bus);
3520         if (path->target != NULL)
3521                 xpt_acquire_target(path->target);
3522         if (path->device != NULL)
3523                 xpt_acquire_device(path->device);
3524 }
3525
3526 void
3527 xpt_release_path(struct cam_path *path)
3528 {
3529         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3530         if (path->device != NULL) {
3531                 xpt_release_device(path->device);
3532                 path->device = NULL;
3533         }
3534         if (path->target != NULL) {
3535                 xpt_release_target(path->target);
3536                 path->target = NULL;
3537         }
3538         if (path->bus != NULL) {
3539                 xpt_release_bus(path->bus);
3540                 path->bus = NULL;
3541         }
3542 }
3543
3544 void
3545 xpt_free_path(struct cam_path *path)
3546 {
3547
3548         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3549         xpt_release_path(path);
3550         free(path, M_CAMPATH);
3551 }
3552
3553 void
3554 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3555     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3556 {
3557
3558         xpt_lock_buses();
3559         if (bus_ref) {
3560                 if (path->bus)
3561                         *bus_ref = path->bus->refcount;
3562                 else
3563                         *bus_ref = 0;
3564         }
3565         if (periph_ref) {
3566                 if (path->periph)
3567                         *periph_ref = path->periph->refcount;
3568                 else
3569                         *periph_ref = 0;
3570         }
3571         xpt_unlock_buses();
3572         if (target_ref) {
3573                 if (path->target)
3574                         *target_ref = path->target->refcount;
3575                 else
3576                         *target_ref = 0;
3577         }
3578         if (device_ref) {
3579                 if (path->device)
3580                         *device_ref = path->device->refcount;
3581                 else
3582                         *device_ref = 0;
3583         }
3584 }
3585
3586 /*
3587  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3588  * in path1, 2 for match with wildcards in path2.
3589  */
3590 int
3591 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3592 {
3593         int retval = 0;
3594
3595         if (path1->bus != path2->bus) {
3596                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3597                         retval = 1;
3598                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3599                         retval = 2;
3600                 else
3601                         return (-1);
3602         }
3603         if (path1->target != path2->target) {
3604                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3605                         if (retval == 0)
3606                                 retval = 1;
3607                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3608                         retval = 2;
3609                 else
3610                         return (-1);
3611         }
3612         if (path1->device != path2->device) {
3613                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3614                         if (retval == 0)
3615                                 retval = 1;
3616                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3617                         retval = 2;
3618                 else
3619                         return (-1);
3620         }
3621         return (retval);
3622 }
3623
3624 int
3625 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3626 {
3627         int retval = 0;
3628
3629         if (path->bus != dev->target->bus) {
3630                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3631                         retval = 1;
3632                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3633                         retval = 2;
3634                 else
3635                         return (-1);
3636         }
3637         if (path->target != dev->target) {
3638                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3639                         if (retval == 0)
3640                                 retval = 1;
3641                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3642                         retval = 2;
3643                 else
3644                         return (-1);
3645         }
3646         if (path->device != dev) {
3647                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3648                         if (retval == 0)
3649                                 retval = 1;
3650                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3651                         retval = 2;
3652                 else
3653                         return (-1);
3654         }
3655         return (retval);
3656 }
3657
3658 void
3659 xpt_print_path(struct cam_path *path)
3660 {
3661
3662         if (path == NULL)
3663                 printf("(nopath): ");
3664         else {
3665                 if (path->periph != NULL)
3666                         printf("(%s%d:", path->periph->periph_name,
3667                                path->periph->unit_number);
3668                 else
3669                         printf("(noperiph:");
3670
3671                 if (path->bus != NULL)
3672                         printf("%s%d:%d:", path->bus->sim->sim_name,
3673                                path->bus->sim->unit_number,
3674                                path->bus->sim->bus_id);
3675                 else
3676                         printf("nobus:");
3677
3678                 if (path->target != NULL)
3679                         printf("%d:", path->target->target_id);
3680                 else
3681                         printf("X:");
3682
3683                 if (path->device != NULL)
3684                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3685                 else
3686                         printf("X): ");
3687         }
3688 }
3689
3690 void
3691 xpt_print_device(struct cam_ed *device)
3692 {
3693
3694         if (device == NULL)
3695                 printf("(nopath): ");
3696         else {
3697                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3698                        device->sim->unit_number,
3699                        device->sim->bus_id,
3700                        device->target->target_id,
3701                        (uintmax_t)device->lun_id);
3702         }
3703 }
3704
3705 void
3706 xpt_print(struct cam_path *path, const char *fmt, ...)
3707 {
3708         va_list ap;
3709         xpt_print_path(path);
3710         va_start(ap, fmt);
3711         vprintf(fmt, ap);
3712         va_end(ap);
3713 }
3714
3715 int
3716 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3717 {
3718         struct sbuf sb;
3719
3720         sbuf_new(&sb, str, str_len, 0);
3721
3722         if (path == NULL)
3723                 sbuf_printf(&sb, "(nopath): ");
3724         else {
3725                 if (path->periph != NULL)
3726                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3727                                     path->periph->unit_number);
3728                 else
3729                         sbuf_printf(&sb, "(noperiph:");
3730
3731                 if (path->bus != NULL)
3732                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3733                                     path->bus->sim->unit_number,
3734                                     path->bus->sim->bus_id);
3735                 else
3736                         sbuf_printf(&sb, "nobus:");
3737
3738                 if (path->target != NULL)
3739                         sbuf_printf(&sb, "%d:", path->target->target_id);
3740                 else
3741                         sbuf_printf(&sb, "X:");
3742
3743                 if (path->device != NULL)
3744                         sbuf_printf(&sb, "%jx): ",
3745                             (uintmax_t)path->device->lun_id);
3746                 else
3747                         sbuf_printf(&sb, "X): ");
3748         }
3749         sbuf_finish(&sb);
3750
3751         return(sbuf_len(&sb));
3752 }
3753
3754 path_id_t
3755 xpt_path_path_id(struct cam_path *path)
3756 {
3757         return(path->bus->path_id);
3758 }
3759
3760 target_id_t
3761 xpt_path_target_id(struct cam_path *path)
3762 {
3763         if (path->target != NULL)
3764                 return (path->target->target_id);
3765         else
3766                 return (CAM_TARGET_WILDCARD);
3767 }
3768
3769 lun_id_t
3770 xpt_path_lun_id(struct cam_path *path)
3771 {
3772         if (path->device != NULL)
3773                 return (path->device->lun_id);
3774         else
3775                 return (CAM_LUN_WILDCARD);
3776 }
3777
3778 struct cam_sim *
3779 xpt_path_sim(struct cam_path *path)
3780 {
3781
3782         return (path->bus->sim);
3783 }
3784
3785 struct cam_periph*
3786 xpt_path_periph(struct cam_path *path)
3787 {
3788
3789         return (path->periph);
3790 }
3791
3792 int
3793 xpt_path_legacy_ata_id(struct cam_path *path)
3794 {
3795         struct cam_eb *bus;
3796         int bus_id;
3797
3798         if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3799             strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3800             strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3801             strcmp(path->bus->sim->sim_name, "siisch") != 0)
3802                 return (-1);
3803
3804         if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3805             path->bus->sim->unit_number < 2) {
3806                 bus_id = path->bus->sim->unit_number;
3807         } else {
3808                 bus_id = 2;
3809                 xpt_lock_buses();
3810                 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3811                         if (bus == path->bus)
3812                                 break;
3813                         if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3814                              bus->sim->unit_number >= 2) ||
3815                             strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3816                             strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3817                             strcmp(bus->sim->sim_name, "siisch") == 0)
3818                                 bus_id++;
3819                 }
3820                 xpt_unlock_buses();
3821         }
3822         if (path->target != NULL) {
3823                 if (path->target->target_id < 2)
3824                         return (bus_id * 2 + path->target->target_id);
3825                 else
3826                         return (-1);
3827         } else
3828                 return (bus_id * 2);
3829 }
3830
3831 /*
3832  * Release a CAM control block for the caller.  Remit the cost of the structure
3833  * to the device referenced by the path.  If the this device had no 'credits'
3834  * and peripheral drivers have registered async callbacks for this notification
3835  * call them now.
3836  */
3837 void
3838 xpt_release_ccb(union ccb *free_ccb)
3839 {
3840         struct   cam_ed *device;
3841         struct   cam_periph *periph;
3842
3843         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3844         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3845         device = free_ccb->ccb_h.path->device;
3846         periph = free_ccb->ccb_h.path->periph;
3847
3848         xpt_free_ccb(free_ccb);
3849         periph->periph_allocated--;
3850         cam_ccbq_release_opening(&device->ccbq);
3851         xpt_run_allocq(periph, 0);
3852 }
3853
3854 /* Functions accessed by SIM drivers */
3855
3856 static struct xpt_xport xport_default = {
3857         .alloc_device = xpt_alloc_device_default,
3858         .action = xpt_action_default,
3859         .async = xpt_dev_async_default,
3860 };
3861
3862 /*
3863  * A sim structure, listing the SIM entry points and instance
3864  * identification info is passed to xpt_bus_register to hook the SIM
3865  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3866  * for this new bus and places it in the array of busses and assigns
3867  * it a path_id.  The path_id may be influenced by "hard wiring"
3868  * information specified by the user.  Once interrupt services are
3869  * available, the bus will be probed.
3870  */
3871 int32_t
3872 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3873 {
3874         struct cam_eb *new_bus;
3875         struct cam_eb *old_bus;
3876         struct ccb_pathinq cpi;
3877         struct cam_path *path;
3878         cam_status status;
3879
3880         sim->bus_id = bus;
3881         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3882                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3883         if (new_bus == NULL) {
3884                 /* Couldn't satisfy request */
3885                 return (CAM_RESRC_UNAVAIL);
3886         }
3887
3888         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3889         TAILQ_INIT(&new_bus->et_entries);
3890         cam_sim_hold(sim);
3891         new_bus->sim = sim;
3892         timevalclear(&new_bus->last_reset);
3893         new_bus->flags = 0;
3894         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3895         new_bus->generation = 0;
3896
3897         xpt_lock_buses();
3898         sim->path_id = new_bus->path_id =
3899             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3900         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3901         while (old_bus != NULL
3902             && old_bus->path_id < new_bus->path_id)
3903                 old_bus = TAILQ_NEXT(old_bus, links);
3904         if (old_bus != NULL)
3905                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3906         else
3907                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3908         xsoftc.bus_generation++;
3909         xpt_unlock_buses();
3910
3911         /*
3912          * Set a default transport so that a PATH_INQ can be issued to
3913          * the SIM.  This will then allow for probing and attaching of
3914          * a more appropriate transport.
3915          */
3916         new_bus->xport = &xport_default;
3917
3918         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3919                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3920         if (status != CAM_REQ_CMP) {
3921                 xpt_release_bus(new_bus);
3922                 free(path, M_CAMXPT);
3923                 return (CAM_RESRC_UNAVAIL);
3924         }
3925
3926         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3927         cpi.ccb_h.func_code = XPT_PATH_INQ;
3928         xpt_action((union ccb *)&cpi);
3929
3930         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3931                 switch (cpi.transport) {
3932                 case XPORT_SPI:
3933                 case XPORT_SAS:
3934                 case XPORT_FC:
3935                 case XPORT_USB:
3936                 case XPORT_ISCSI:
3937                 case XPORT_SRP:
3938                 case XPORT_PPB:
3939                         new_bus->xport = scsi_get_xport();
3940                         break;
3941                 case XPORT_ATA:
3942                 case XPORT_SATA:
3943                         new_bus->xport = ata_get_xport();
3944                         break;
3945                 default:
3946                         new_bus->xport = &xport_default;
3947                         break;
3948                 }
3949         }
3950
3951         /* Notify interested parties */
3952         if (sim->path_id != CAM_XPT_PATH_ID) {
3953
3954                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3955                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3956                         union   ccb *scan_ccb;
3957
3958                         /* Initiate bus rescan. */
3959                         scan_ccb = xpt_alloc_ccb_nowait();
3960                         if (scan_ccb != NULL) {
3961                                 scan_ccb->ccb_h.path = path;
3962                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3963                                 scan_ccb->crcn.flags = 0;
3964                                 xpt_rescan(scan_ccb);
3965                         } else {
3966                                 xpt_print(path,
3967                                           "Can't allocate CCB to scan bus\n");
3968                                 xpt_free_path(path);
3969                         }
3970                 } else
3971                         xpt_free_path(path);
3972         } else
3973                 xpt_free_path(path);
3974         return (CAM_SUCCESS);
3975 }
3976
3977 int32_t
3978 xpt_bus_deregister(path_id_t pathid)
3979 {
3980         struct cam_path bus_path;
3981         cam_status status;
3982
3983         status = xpt_compile_path(&bus_path, NULL, pathid,
3984                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3985         if (status != CAM_REQ_CMP)
3986                 return (status);
3987
3988         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3989         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3990
3991         /* Release the reference count held while registered. */
3992         xpt_release_bus(bus_path.bus);
3993         xpt_release_path(&bus_path);
3994
3995         return (CAM_REQ_CMP);
3996 }
3997
3998 static path_id_t
3999 xptnextfreepathid(void)
4000 {
4001         struct cam_eb *bus;
4002         path_id_t pathid;
4003         const char *strval;
4004
4005         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4006         pathid = 0;
4007         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4008 retry:
4009         /* Find an unoccupied pathid */
4010         while (bus != NULL && bus->path_id <= pathid) {
4011                 if (bus->path_id == pathid)
4012                         pathid++;
4013                 bus = TAILQ_NEXT(bus, links);
4014         }
4015
4016         /*
4017          * Ensure that this pathid is not reserved for
4018          * a bus that may be registered in the future.
4019          */
4020         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4021                 ++pathid;
4022                 /* Start the search over */
4023                 goto retry;
4024         }
4025         return (pathid);
4026 }
4027
4028 static path_id_t
4029 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4030 {
4031         path_id_t pathid;
4032         int i, dunit, val;
4033         char buf[32];
4034         const char *dname;
4035
4036         pathid = CAM_XPT_PATH_ID;
4037         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4038         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4039                 return (pathid);
4040         i = 0;
4041         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4042                 if (strcmp(dname, "scbus")) {
4043                         /* Avoid a bit of foot shooting. */
4044                         continue;
4045                 }
4046                 if (dunit < 0)          /* unwired?! */
4047                         continue;
4048                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4049                         if (sim_bus == val) {
4050                                 pathid = dunit;
4051                                 break;
4052                         }
4053                 } else if (sim_bus == 0) {
4054                         /* Unspecified matches bus 0 */
4055                         pathid = dunit;
4056                         break;
4057                 } else {
4058                         printf("Ambiguous scbus configuration for %s%d "
4059                                "bus %d, cannot wire down.  The kernel "
4060                                "config entry for scbus%d should "
4061                                "specify a controller bus.\n"
4062                                "Scbus will be assigned dynamically.\n",
4063                                sim_name, sim_unit, sim_bus, dunit);
4064                         break;
4065                 }
4066         }
4067
4068         if (pathid == CAM_XPT_PATH_ID)
4069                 pathid = xptnextfreepathid();
4070         return (pathid);
4071 }
4072
4073 static const char *
4074 xpt_async_string(u_int32_t async_code)
4075 {
4076
4077         switch (async_code) {
4078         case AC_BUS_RESET: return ("AC_BUS_RESET");
4079         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4080         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4081         case AC_SENT_BDR: return ("AC_SENT_BDR");
4082         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4083         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4084         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4085         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4086         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4087         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4088         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4089         case AC_CONTRACT: return ("AC_CONTRACT");
4090         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4091         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4092         }
4093         return ("AC_UNKNOWN");
4094 }
4095
4096 static int
4097 xpt_async_size(u_int32_t async_code)
4098 {
4099
4100         switch (async_code) {
4101         case AC_BUS_RESET: return (0);
4102         case AC_UNSOL_RESEL: return (0);
4103         case AC_SCSI_AEN: return (0);
4104         case AC_SENT_BDR: return (0);
4105         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4106         case AC_PATH_DEREGISTERED: return (0);
4107         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4108         case AC_LOST_DEVICE: return (0);
4109         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4110         case AC_INQ_CHANGED: return (0);
4111         case AC_GETDEV_CHANGED: return (0);
4112         case AC_CONTRACT: return (sizeof(struct ac_contract));
4113         case AC_ADVINFO_CHANGED: return (-1);
4114         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4115         }
4116         return (0);
4117 }
4118
4119 static int
4120 xpt_async_process_dev(struct cam_ed *device, void *arg)
4121 {
4122         union ccb *ccb = arg;
4123         struct cam_path *path = ccb->ccb_h.path;
4124         void *async_arg = ccb->casync.async_arg_ptr;
4125         u_int32_t async_code = ccb->casync.async_code;
4126         int relock;
4127
4128         if (path->device != device
4129          && path->device->lun_id != CAM_LUN_WILDCARD
4130          && device->lun_id != CAM_LUN_WILDCARD)
4131                 return (1);
4132
4133         /*
4134          * The async callback could free the device.
4135          * If it is a broadcast async, it doesn't hold
4136          * device reference, so take our own reference.
4137          */
4138         xpt_acquire_device(device);
4139
4140         /*
4141          * If async for specific device is to be delivered to
4142          * the wildcard client, take the specific device lock.
4143          * XXX: We may need a way for client to specify it.
4144          */
4145         if ((device->lun_id == CAM_LUN_WILDCARD &&
4146              path->device->lun_id != CAM_LUN_WILDCARD) ||
4147             (device->target->target_id == CAM_TARGET_WILDCARD &&
4148              path->target->target_id != CAM_TARGET_WILDCARD) ||
4149             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4150              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4151                 mtx_unlock(&device->device_mtx);
4152                 xpt_path_lock(path);
4153                 relock = 1;
4154         } else
4155                 relock = 0;
4156
4157         (*(device->target->bus->xport->async))(async_code,
4158             device->target->bus, device->target, device, async_arg);
4159         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4160
4161         if (relock) {
4162                 xpt_path_unlock(path);
4163                 mtx_lock(&device->device_mtx);
4164         }
4165         xpt_release_device(device);
4166         return (1);
4167 }
4168
4169 static int
4170 xpt_async_process_tgt(struct cam_et *target, void *arg)
4171 {
4172         union ccb *ccb = arg;
4173         struct cam_path *path = ccb->ccb_h.path;
4174
4175         if (path->target != target
4176          && path->target->target_id != CAM_TARGET_WILDCARD
4177          && target->target_id != CAM_TARGET_WILDCARD)
4178                 return (1);
4179
4180         if (ccb->casync.async_code == AC_SENT_BDR) {
4181                 /* Update our notion of when the last reset occurred */
4182                 microtime(&target->last_reset);
4183         }
4184
4185         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4186 }
4187
4188 static void
4189 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4190 {
4191         struct cam_eb *bus;
4192         struct cam_path *path;
4193         void *async_arg;
4194         u_int32_t async_code;
4195
4196         path = ccb->ccb_h.path;
4197         async_code = ccb->casync.async_code;
4198         async_arg = ccb->casync.async_arg_ptr;
4199         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4200             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4201         bus = path->bus;
4202
4203         if (async_code == AC_BUS_RESET) {
4204                 /* Update our notion of when the last reset occurred */
4205                 microtime(&bus->last_reset);
4206         }
4207
4208         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4209
4210         /*
4211          * If this wasn't a fully wildcarded async, tell all
4212          * clients that want all async events.
4213          */
4214         if (bus != xpt_periph->path->bus) {
4215                 xpt_path_lock(xpt_periph->path);
4216                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4217                 xpt_path_unlock(xpt_periph->path);
4218         }
4219
4220         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4221                 xpt_release_devq(path, 1, TRUE);
4222         else
4223                 xpt_release_simq(path->bus->sim, TRUE);
4224         if (ccb->casync.async_arg_size > 0)
4225                 free(async_arg, M_CAMXPT);
4226         xpt_free_path(path);
4227         xpt_free_ccb(ccb);
4228 }
4229
4230 static void
4231 xpt_async_bcast(struct async_list *async_head,
4232                 u_int32_t async_code,
4233                 struct cam_path *path, void *async_arg)
4234 {
4235         struct async_node *cur_entry;
4236         struct mtx *mtx;
4237
4238         cur_entry = SLIST_FIRST(async_head);
4239         while (cur_entry != NULL) {
4240                 struct async_node *next_entry;
4241                 /*
4242                  * Grab the next list entry before we call the current
4243                  * entry's callback.  This is because the callback function
4244                  * can delete its async callback entry.
4245                  */
4246                 next_entry = SLIST_NEXT(cur_entry, links);
4247                 if ((cur_entry->event_enable & async_code) != 0) {
4248                         mtx = cur_entry->event_lock ?
4249                             path->device->sim->mtx : NULL;
4250                         if (mtx)
4251                                 mtx_lock(mtx);
4252                         cur_entry->callback(cur_entry->callback_arg,
4253                                             async_code, path,
4254                                             async_arg);
4255                         if (mtx)
4256                                 mtx_unlock(mtx);
4257                 }
4258                 cur_entry = next_entry;
4259         }
4260 }
4261
4262 void
4263 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4264 {
4265         union ccb *ccb;
4266         int size;
4267
4268         ccb = xpt_alloc_ccb_nowait();
4269         if (ccb == NULL) {
4270                 xpt_print(path, "Can't allocate CCB to send %s\n",
4271                     xpt_async_string(async_code));
4272                 return;
4273         }
4274
4275         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4276                 xpt_print(path, "Can't allocate path to send %s\n",
4277                     xpt_async_string(async_code));
4278                 xpt_free_ccb(ccb);
4279                 return;
4280         }
4281         ccb->ccb_h.path->periph = NULL;
4282         ccb->ccb_h.func_code = XPT_ASYNC;
4283         ccb->ccb_h.cbfcnp = xpt_async_process;
4284         ccb->ccb_h.flags |= CAM_UNLOCKED;
4285         ccb->casync.async_code = async_code;
4286         ccb->casync.async_arg_size = 0;
4287         size = xpt_async_size(async_code);
4288         if (size > 0 && async_arg != NULL) {
4289                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4290                 if (ccb->casync.async_arg_ptr == NULL) {
4291                         xpt_print(path, "Can't allocate argument to send %s\n",
4292                             xpt_async_string(async_code));
4293                         xpt_free_path(ccb->ccb_h.path);
4294                         xpt_free_ccb(ccb);
4295                         return;
4296                 }
4297                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4298                 ccb->casync.async_arg_size = size;
4299         } else if (size < 0) {
4300                 ccb->casync.async_arg_ptr = async_arg;
4301                 ccb->casync.async_arg_size = size;
4302         }
4303         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4304                 xpt_freeze_devq(path, 1);
4305         else
4306                 xpt_freeze_simq(path->bus->sim, 1);
4307         xpt_done(ccb);
4308 }
4309
4310 static void
4311 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4312                       struct cam_et *target, struct cam_ed *device,
4313                       void *async_arg)
4314 {
4315
4316         /*
4317          * We only need to handle events for real devices.
4318          */
4319         if (target->target_id == CAM_TARGET_WILDCARD
4320          || device->lun_id == CAM_LUN_WILDCARD)
4321                 return;
4322
4323         printf("%s called\n", __func__);
4324 }
4325
4326 static uint32_t
4327 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4328 {
4329         struct cam_devq *devq;
4330         uint32_t freeze;
4331
4332         devq = dev->sim->devq;
4333         mtx_assert(&devq->send_mtx, MA_OWNED);
4334         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4335             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4336             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4337         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4338         /* Remove frozen device from sendq. */
4339         if (device_is_queued(dev))
4340                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4341         return (freeze);
4342 }
4343
4344 u_int32_t
4345 xpt_freeze_devq(struct cam_path *path, u_int count)
4346 {
4347         struct cam_ed   *dev = path->device;
4348         struct cam_devq *devq;
4349         uint32_t         freeze;
4350
4351         devq = dev->sim->devq;
4352         mtx_lock(&devq->send_mtx);
4353         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4354         freeze = xpt_freeze_devq_device(dev, count);
4355         mtx_unlock(&devq->send_mtx);
4356         return (freeze);
4357 }
4358
4359 u_int32_t
4360 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4361 {
4362         struct cam_devq *devq;
4363         uint32_t         freeze;
4364
4365         devq = sim->devq;
4366         mtx_lock(&devq->send_mtx);
4367         freeze = (devq->send_queue.qfrozen_cnt += count);
4368         mtx_unlock(&devq->send_mtx);
4369         return (freeze);
4370 }
4371
4372 static void
4373 xpt_release_devq_timeout(void *arg)
4374 {
4375         struct cam_ed *dev;
4376         struct cam_devq *devq;
4377
4378         dev = (struct cam_ed *)arg;
4379         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4380         devq = dev->sim->devq;
4381         mtx_assert(&devq->send_mtx, MA_OWNED);
4382         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4383                 xpt_run_devq(devq);
4384 }
4385
4386 void
4387 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4388 {
4389         struct cam_ed *dev;
4390         struct cam_devq *devq;
4391
4392         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4393             count, run_queue));
4394         dev = path->device;
4395         devq = dev->sim->devq;
4396         mtx_lock(&devq->send_mtx);
4397         if (xpt_release_devq_device(dev, count, run_queue))
4398                 xpt_run_devq(dev->sim->devq);
4399         mtx_unlock(&devq->send_mtx);
4400 }
4401
4402 static int
4403 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4404 {
4405
4406         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4407         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4408             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4409             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4410         if (count > dev->ccbq.queue.qfrozen_cnt) {
4411 #ifdef INVARIANTS
4412                 printf("xpt_release_devq(): requested %u > present %u\n",
4413                     count, dev->ccbq.queue.qfrozen_cnt);
4414 #endif
4415                 count = dev->ccbq.queue.qfrozen_cnt;
4416         }
4417         dev->ccbq.queue.qfrozen_cnt -= count;
4418         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4419                 /*
4420                  * No longer need to wait for a successful
4421                  * command completion.
4422                  */
4423                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4424                 /*
4425                  * Remove any timeouts that might be scheduled
4426                  * to release this queue.
4427                  */
4428                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4429                         callout_stop(&dev->callout);
4430                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4431                 }
4432                 /*
4433                  * Now that we are unfrozen schedule the
4434                  * device so any pending transactions are
4435                  * run.
4436                  */
4437                 xpt_schedule_devq(dev->sim->devq, dev);
4438         } else
4439                 run_queue = 0;
4440         return (run_queue);
4441 }
4442
4443 void
4444 xpt_release_simq(struct cam_sim *sim, int run_queue)
4445 {
4446         struct cam_devq *devq;
4447
4448         devq = sim->devq;
4449         mtx_lock(&devq->send_mtx);
4450         if (devq->send_queue.qfrozen_cnt <= 0) {
4451 #ifdef INVARIANTS
4452                 printf("xpt_release_simq: requested 1 > present %u\n",
4453                     devq->send_queue.qfrozen_cnt);
4454 #endif
4455         } else
4456                 devq->send_queue.qfrozen_cnt--;
4457         if (devq->send_queue.qfrozen_cnt == 0) {
4458                 /*
4459                  * If there is a timeout scheduled to release this
4460                  * sim queue, remove it.  The queue frozen count is
4461                  * already at 0.
4462                  */
4463                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4464                         callout_stop(&sim->callout);
4465                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4466                 }
4467                 if (run_queue) {
4468                         /*
4469                          * Now that we are unfrozen run the send queue.
4470                          */
4471                         xpt_run_devq(sim->devq);
4472                 }
4473         }
4474         mtx_unlock(&devq->send_mtx);
4475 }
4476
4477 /*
4478  * XXX Appears to be unused.
4479  */
4480 static void
4481 xpt_release_simq_timeout(void *arg)
4482 {
4483         struct cam_sim *sim;
4484
4485         sim = (struct cam_sim *)arg;
4486         xpt_release_simq(sim, /* run_queue */ TRUE);
4487 }
4488
4489 void
4490 xpt_done(union ccb *done_ccb)
4491 {
4492         struct cam_doneq *queue;
4493         int     run, hash;
4494
4495         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4496         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4497                 return;
4498
4499         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4500             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4501         queue = &cam_doneqs[hash];
4502         mtx_lock(&queue->cam_doneq_mtx);
4503         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4504         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4505         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4506         mtx_unlock(&queue->cam_doneq_mtx);
4507         if (run)
4508                 wakeup(&queue->cam_doneq);
4509 }
4510
4511 void
4512 xpt_done_direct(union ccb *done_ccb)
4513 {
4514
4515         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4516         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4517                 return;
4518
4519         xpt_done_process(&done_ccb->ccb_h);
4520 }
4521
4522 union ccb *
4523 xpt_alloc_ccb()
4524 {
4525         union ccb *new_ccb;
4526
4527         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4528         return (new_ccb);
4529 }
4530
4531 union ccb *
4532 xpt_alloc_ccb_nowait()
4533 {
4534         union ccb *new_ccb;
4535
4536         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4537         return (new_ccb);
4538 }
4539
4540 void
4541 xpt_free_ccb(union ccb *free_ccb)
4542 {
4543         free(free_ccb, M_CAMCCB);
4544 }
4545
4546
4547
4548 /* Private XPT functions */
4549
4550 /*
4551  * Get a CAM control block for the caller. Charge the structure to the device
4552  * referenced by the path.  If we don't have sufficient resources to allocate
4553  * more ccbs, we return NULL.
4554  */
4555 static union ccb *
4556 xpt_get_ccb_nowait(struct cam_periph *periph)
4557 {
4558         union ccb *new_ccb;
4559
4560         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4561         if (new_ccb == NULL)
4562                 return (NULL);
4563         periph->periph_allocated++;
4564         cam_ccbq_take_opening(&periph->path->device->ccbq);
4565         return (new_ccb);
4566 }
4567
4568 static union ccb *
4569 xpt_get_ccb(struct cam_periph *periph)
4570 {
4571         union ccb *new_ccb;
4572
4573         cam_periph_unlock(periph);
4574         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4575         cam_periph_lock(periph);
4576         periph->periph_allocated++;
4577         cam_ccbq_take_opening(&periph->path->device->ccbq);
4578         return (new_ccb);
4579 }
4580
4581 union ccb *
4582 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4583 {
4584         struct ccb_hdr *ccb_h;
4585
4586         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4587         cam_periph_assert(periph, MA_OWNED);
4588         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4589             ccb_h->pinfo.priority != priority) {
4590                 if (priority < periph->immediate_priority) {
4591                         periph->immediate_priority = priority;
4592                         xpt_run_allocq(periph, 0);
4593                 } else
4594                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4595                             "cgticb", 0);
4596         }
4597         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4598         return ((union ccb *)ccb_h);
4599 }
4600
4601 static void
4602 xpt_acquire_bus(struct cam_eb *bus)
4603 {
4604
4605         xpt_lock_buses();
4606         bus->refcount++;
4607         xpt_unlock_buses();
4608 }
4609
4610 static void
4611 xpt_release_bus(struct cam_eb *bus)
4612 {
4613
4614         xpt_lock_buses();
4615         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4616         if (--bus->refcount > 0) {
4617                 xpt_unlock_buses();
4618                 return;
4619         }
4620         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4621         xsoftc.bus_generation++;
4622         xpt_unlock_buses();
4623         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4624             ("destroying bus, but target list is not empty"));
4625         cam_sim_release(bus->sim);
4626         mtx_destroy(&bus->eb_mtx);
4627         free(bus, M_CAMXPT);
4628 }
4629
4630 static struct cam_et *
4631 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4632 {
4633         struct cam_et *cur_target, *target;
4634
4635         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4636         mtx_assert(&bus->eb_mtx, MA_OWNED);
4637         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4638                                          M_NOWAIT|M_ZERO);
4639         if (target == NULL)
4640                 return (NULL);
4641
4642         TAILQ_INIT(&target->ed_entries);
4643         target->bus = bus;
4644         target->target_id = target_id;
4645         target->refcount = 1;
4646         target->generation = 0;
4647         target->luns = NULL;
4648         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4649         timevalclear(&target->last_reset);
4650         /*
4651          * Hold a reference to our parent bus so it
4652          * will not go away before we do.
4653          */
4654         bus->refcount++;
4655
4656         /* Insertion sort into our bus's target list */
4657         cur_target = TAILQ_FIRST(&bus->et_entries);
4658         while (cur_target != NULL && cur_target->target_id < target_id)
4659                 cur_target = TAILQ_NEXT(cur_target, links);
4660         if (cur_target != NULL) {
4661                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4662         } else {
4663                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4664         }
4665         bus->generation++;
4666         return (target);
4667 }
4668
4669 static void
4670 xpt_acquire_target(struct cam_et *target)
4671 {
4672         struct cam_eb *bus = target->bus;
4673
4674         mtx_lock(&bus->eb_mtx);
4675         target->refcount++;
4676         mtx_unlock(&bus->eb_mtx);
4677 }
4678
4679 static void
4680 xpt_release_target(struct cam_et *target)
4681 {
4682         struct cam_eb *bus = target->bus;
4683
4684         mtx_lock(&bus->eb_mtx);
4685         if (--target->refcount > 0) {
4686                 mtx_unlock(&bus->eb_mtx);
4687                 return;
4688         }
4689         TAILQ_REMOVE(&bus->et_entries, target, links);
4690         bus->generation++;
4691         mtx_unlock(&bus->eb_mtx);
4692         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4693             ("destroying target, but device list is not empty"));
4694         xpt_release_bus(bus);
4695         mtx_destroy(&target->luns_mtx);
4696         if (target->luns)
4697                 free(target->luns, M_CAMXPT);
4698         free(target, M_CAMXPT);
4699 }
4700
4701 static struct cam_ed *
4702 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4703                          lun_id_t lun_id)
4704 {
4705         struct cam_ed *device;
4706
4707         device = xpt_alloc_device(bus, target, lun_id);
4708         if (device == NULL)
4709                 return (NULL);
4710
4711         device->mintags = 1;
4712         device->maxtags = 1;
4713         return (device);
4714 }
4715
4716 static void
4717 xpt_destroy_device(void *context, int pending)
4718 {
4719         struct cam_ed   *device = context;
4720
4721         mtx_lock(&device->device_mtx);
4722         mtx_destroy(&device->device_mtx);
4723         free(device, M_CAMDEV);
4724 }
4725
4726 struct cam_ed *
4727 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4728 {
4729         struct cam_ed   *cur_device, *device;
4730         struct cam_devq *devq;
4731         cam_status status;
4732
4733         mtx_assert(&bus->eb_mtx, MA_OWNED);
4734         /* Make space for us in the device queue on our bus */
4735         devq = bus->sim->devq;
4736         mtx_lock(&devq->send_mtx);
4737         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4738         mtx_unlock(&devq->send_mtx);
4739         if (status != CAM_REQ_CMP)
4740                 return (NULL);
4741
4742         device = (struct cam_ed *)malloc(sizeof(*device),
4743                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4744         if (device == NULL)
4745                 return (NULL);
4746
4747         cam_init_pinfo(&device->devq_entry);
4748         device->target = target;
4749         device->lun_id = lun_id;
4750         device->sim = bus->sim;
4751         if (cam_ccbq_init(&device->ccbq,
4752                           bus->sim->max_dev_openings) != 0) {
4753                 free(device, M_CAMDEV);
4754                 return (NULL);
4755         }
4756         SLIST_INIT(&device->asyncs);
4757         SLIST_INIT(&device->periphs);
4758         device->generation = 0;
4759         device->flags = CAM_DEV_UNCONFIGURED;
4760         device->tag_delay_count = 0;
4761         device->tag_saved_openings = 0;
4762         device->refcount = 1;
4763         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4764         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4765         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4766         /*
4767          * Hold a reference to our parent bus so it
4768          * will not go away before we do.
4769          */
4770         target->refcount++;
4771
4772         cur_device = TAILQ_FIRST(&target->ed_entries);
4773         while (cur_device != NULL && cur_device->lun_id < lun_id)
4774                 cur_device = TAILQ_NEXT(cur_device, links);
4775         if (cur_device != NULL)
4776                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4777         else
4778                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4779         target->generation++;
4780         return (device);
4781 }
4782
4783 void
4784 xpt_acquire_device(struct cam_ed *device)
4785 {
4786         struct cam_eb *bus = device->target->bus;
4787
4788         mtx_lock(&bus->eb_mtx);
4789         device->refcount++;
4790         mtx_unlock(&bus->eb_mtx);
4791 }
4792
4793 void
4794 xpt_release_device(struct cam_ed *device)
4795 {
4796         struct cam_eb *bus = device->target->bus;
4797         struct cam_devq *devq;
4798
4799         mtx_lock(&bus->eb_mtx);
4800         if (--device->refcount > 0) {
4801                 mtx_unlock(&bus->eb_mtx);
4802                 return;
4803         }
4804
4805         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4806         device->target->generation++;
4807         mtx_unlock(&bus->eb_mtx);
4808
4809         /* Release our slot in the devq */
4810         devq = bus->sim->devq;
4811         mtx_lock(&devq->send_mtx);
4812         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4813         mtx_unlock(&devq->send_mtx);
4814
4815         KASSERT(SLIST_EMPTY(&device->periphs),
4816             ("destroying device, but periphs list is not empty"));
4817         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4818             ("destroying device while still queued for ccbs"));
4819
4820         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4821                 callout_stop(&device->callout);
4822
4823         xpt_release_target(device->target);
4824
4825         cam_ccbq_fini(&device->ccbq);
4826         /*
4827          * Free allocated memory.  free(9) does nothing if the
4828          * supplied pointer is NULL, so it is safe to call without
4829          * checking.
4830          */
4831         free(device->supported_vpds, M_CAMXPT);
4832         free(device->device_id, M_CAMXPT);
4833         free(device->ext_inq, M_CAMXPT);
4834         free(device->physpath, M_CAMXPT);
4835         free(device->rcap_buf, M_CAMXPT);
4836         free(device->serial_num, M_CAMXPT);
4837         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4838 }
4839
4840 u_int32_t
4841 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4842 {
4843         int     result;
4844         struct  cam_ed *dev;
4845
4846         dev = path->device;
4847         mtx_lock(&dev->sim->devq->send_mtx);
4848         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4849         mtx_unlock(&dev->sim->devq->send_mtx);
4850         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4851          || (dev->inq_flags & SID_CmdQue) != 0)
4852                 dev->tag_saved_openings = newopenings;
4853         return (result);
4854 }
4855
4856 static struct cam_eb *
4857 xpt_find_bus(path_id_t path_id)
4858 {
4859         struct cam_eb *bus;
4860
4861         xpt_lock_buses();
4862         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4863              bus != NULL;
4864              bus = TAILQ_NEXT(bus, links)) {
4865                 if (bus->path_id == path_id) {
4866                         bus->refcount++;
4867                         break;
4868                 }
4869         }
4870         xpt_unlock_buses();
4871         return (bus);
4872 }
4873
4874 static struct cam_et *
4875 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4876 {
4877         struct cam_et *target;
4878
4879         mtx_assert(&bus->eb_mtx, MA_OWNED);
4880         for (target = TAILQ_FIRST(&bus->et_entries);
4881              target != NULL;
4882              target = TAILQ_NEXT(target, links)) {
4883                 if (target->target_id == target_id) {
4884                         target->refcount++;
4885                         break;
4886                 }
4887         }
4888         return (target);
4889 }
4890
4891 static struct cam_ed *
4892 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4893 {
4894         struct cam_ed *device;
4895
4896         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4897         for (device = TAILQ_FIRST(&target->ed_entries);
4898              device != NULL;
4899              device = TAILQ_NEXT(device, links)) {
4900                 if (device->lun_id == lun_id) {
4901                         device->refcount++;
4902                         break;
4903                 }
4904         }
4905         return (device);
4906 }
4907
4908 void
4909 xpt_start_tags(struct cam_path *path)
4910 {
4911         struct ccb_relsim crs;
4912         struct cam_ed *device;
4913         struct cam_sim *sim;
4914         int    newopenings;
4915
4916         device = path->device;
4917         sim = path->bus->sim;
4918         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4919         xpt_freeze_devq(path, /*count*/1);
4920         device->inq_flags |= SID_CmdQue;
4921         if (device->tag_saved_openings != 0)
4922                 newopenings = device->tag_saved_openings;
4923         else
4924                 newopenings = min(device->maxtags,
4925                                   sim->max_tagged_dev_openings);
4926         xpt_dev_ccbq_resize(path, newopenings);
4927         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4928         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4929         crs.ccb_h.func_code = XPT_REL_SIMQ;
4930         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4931         crs.openings
4932             = crs.release_timeout
4933             = crs.qfrozen_cnt
4934             = 0;
4935         xpt_action((union ccb *)&crs);
4936 }
4937
4938 void
4939 xpt_stop_tags(struct cam_path *path)
4940 {
4941         struct ccb_relsim crs;
4942         struct cam_ed *device;
4943         struct cam_sim *sim;
4944
4945         device = path->device;
4946         sim = path->bus->sim;
4947         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4948         device->tag_delay_count = 0;
4949         xpt_freeze_devq(path, /*count*/1);
4950         device->inq_flags &= ~SID_CmdQue;
4951         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4952         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4953         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4954         crs.ccb_h.func_code = XPT_REL_SIMQ;
4955         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4956         crs.openings
4957             = crs.release_timeout
4958             = crs.qfrozen_cnt
4959             = 0;
4960         xpt_action((union ccb *)&crs);
4961 }
4962
4963 static void
4964 xpt_boot_delay(void *arg)
4965 {
4966
4967         xpt_release_boot();
4968 }
4969
4970 static void
4971 xpt_config(void *arg)
4972 {
4973         /*
4974          * Now that interrupts are enabled, go find our devices
4975          */
4976         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4977                 printf("xpt_config: failed to create taskqueue thread.\n");
4978
4979         /* Setup debugging path */
4980         if (cam_dflags != CAM_DEBUG_NONE) {
4981                 if (xpt_create_path(&cam_dpath, NULL,
4982                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4983                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4984                         printf("xpt_config: xpt_create_path() failed for debug"
4985                                " target %d:%d:%d, debugging disabled\n",
4986                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4987                         cam_dflags = CAM_DEBUG_NONE;
4988                 }
4989         } else
4990                 cam_dpath = NULL;
4991
4992         periphdriver_init(1);
4993         xpt_hold_boot();
4994         callout_init(&xsoftc.boot_callout, 1);
4995         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4996             xpt_boot_delay, NULL, 0);
4997         /* Fire up rescan thread. */
4998         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4999             "cam", "scanner")) {
5000                 printf("xpt_config: failed to create rescan thread.\n");
5001         }
5002 }
5003
5004 void
5005 xpt_hold_boot(void)
5006 {
5007         xpt_lock_buses();
5008         xsoftc.buses_to_config++;
5009         xpt_unlock_buses();
5010 }
5011
5012 void
5013 xpt_release_boot(void)
5014 {
5015         xpt_lock_buses();
5016         xsoftc.buses_to_config--;
5017         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5018                 struct  xpt_task *task;
5019
5020                 xsoftc.buses_config_done = 1;
5021                 xpt_unlock_buses();
5022                 /* Call manually because we don't have any busses */
5023                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5024                 if (task != NULL) {
5025                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5026                         taskqueue_enqueue(taskqueue_thread, &task->task);
5027                 }
5028         } else
5029                 xpt_unlock_buses();
5030 }
5031
5032 /*
5033  * If the given device only has one peripheral attached to it, and if that
5034  * peripheral is the passthrough driver, announce it.  This insures that the
5035  * user sees some sort of announcement for every peripheral in their system.
5036  */
5037 static int
5038 xptpassannouncefunc(struct cam_ed *device, void *arg)
5039 {
5040         struct cam_periph *periph;
5041         int i;
5042
5043         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5044              periph = SLIST_NEXT(periph, periph_links), i++);
5045
5046         periph = SLIST_FIRST(&device->periphs);
5047         if ((i == 1)
5048          && (strncmp(periph->periph_name, "pass", 4) == 0))
5049                 xpt_announce_periph(periph, NULL);
5050
5051         return(1);
5052 }
5053
5054 static void
5055 xpt_finishconfig_task(void *context, int pending)
5056 {
5057
5058         periphdriver_init(2);
5059         /*
5060          * Check for devices with no "standard" peripheral driver
5061          * attached.  For any devices like that, announce the
5062          * passthrough driver so the user will see something.
5063          */
5064         if (!bootverbose)
5065                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5066
5067         /* Release our hook so that the boot can continue. */
5068         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5069         free(xsoftc.xpt_config_hook, M_CAMXPT);
5070         xsoftc.xpt_config_hook = NULL;
5071
5072         free(context, M_CAMXPT);
5073 }
5074
5075 cam_status
5076 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5077                    struct cam_path *path)
5078 {
5079         struct ccb_setasync csa;
5080         cam_status status;
5081         int xptpath = 0;
5082
5083         if (path == NULL) {
5084                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5085                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5086                 if (status != CAM_REQ_CMP)
5087                         return (status);
5088                 xpt_path_lock(path);
5089                 xptpath = 1;
5090         }
5091
5092         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5093         csa.ccb_h.func_code = XPT_SASYNC_CB;
5094         csa.event_enable = event;
5095         csa.callback = cbfunc;
5096         csa.callback_arg = cbarg;
5097         xpt_action((union ccb *)&csa);
5098         status = csa.ccb_h.status;
5099
5100         if (xptpath) {
5101                 xpt_path_unlock(path);
5102                 xpt_free_path(path);
5103         }
5104
5105         if ((status == CAM_REQ_CMP) &&
5106             (csa.event_enable & AC_FOUND_DEVICE)) {
5107                 /*
5108                  * Get this peripheral up to date with all
5109                  * the currently existing devices.
5110                  */
5111                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5112         }
5113         if ((status == CAM_REQ_CMP) &&
5114             (csa.event_enable & AC_PATH_REGISTERED)) {
5115                 /*
5116                  * Get this peripheral up to date with all
5117                  * the currently existing busses.
5118                  */
5119                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5120         }
5121
5122         return (status);
5123 }
5124
5125 static void
5126 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5127 {
5128         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5129
5130         switch (work_ccb->ccb_h.func_code) {
5131         /* Common cases first */
5132         case XPT_PATH_INQ:              /* Path routing inquiry */
5133         {
5134                 struct ccb_pathinq *cpi;
5135
5136                 cpi = &work_ccb->cpi;
5137                 cpi->version_num = 1; /* XXX??? */
5138                 cpi->hba_inquiry = 0;
5139                 cpi->target_sprt = 0;
5140                 cpi->hba_misc = 0;
5141                 cpi->hba_eng_cnt = 0;
5142                 cpi->max_target = 0;
5143                 cpi->max_lun = 0;
5144                 cpi->initiator_id = 0;
5145                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5146                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5147                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5148                 cpi->unit_number = sim->unit_number;
5149                 cpi->bus_id = sim->bus_id;
5150                 cpi->base_transfer_speed = 0;
5151                 cpi->protocol = PROTO_UNSPECIFIED;
5152                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5153                 cpi->transport = XPORT_UNSPECIFIED;
5154                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5155                 cpi->ccb_h.status = CAM_REQ_CMP;
5156                 xpt_done(work_ccb);
5157                 break;
5158         }
5159         default:
5160                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5161                 xpt_done(work_ccb);
5162                 break;
5163         }
5164 }
5165
5166 /*
5167  * The xpt as a "controller" has no interrupt sources, so polling
5168  * is a no-op.
5169  */
5170 static void
5171 xptpoll(struct cam_sim *sim)
5172 {
5173 }
5174
5175 void
5176 xpt_lock_buses(void)
5177 {
5178         mtx_lock(&xsoftc.xpt_topo_lock);
5179 }
5180
5181 void
5182 xpt_unlock_buses(void)
5183 {
5184         mtx_unlock(&xsoftc.xpt_topo_lock);
5185 }
5186
5187 struct mtx *
5188 xpt_path_mtx(struct cam_path *path)
5189 {
5190
5191         return (&path->device->device_mtx);
5192 }
5193
5194 static void
5195 xpt_done_process(struct ccb_hdr *ccb_h)
5196 {
5197         struct cam_sim *sim;
5198         struct cam_devq *devq;
5199         struct mtx *mtx = NULL;
5200
5201         if (ccb_h->flags & CAM_HIGH_POWER) {
5202                 struct highpowerlist    *hphead;
5203                 struct cam_ed           *device;
5204
5205                 mtx_lock(&xsoftc.xpt_highpower_lock);
5206                 hphead = &xsoftc.highpowerq;
5207
5208                 device = STAILQ_FIRST(hphead);
5209
5210                 /*
5211                  * Increment the count since this command is done.
5212                  */
5213                 xsoftc.num_highpower++;
5214
5215                 /*
5216                  * Any high powered commands queued up?
5217                  */
5218                 if (device != NULL) {
5219
5220                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5221                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5222
5223                         mtx_lock(&device->sim->devq->send_mtx);
5224                         xpt_release_devq_device(device,
5225                                          /*count*/1, /*runqueue*/TRUE);
5226                         mtx_unlock(&device->sim->devq->send_mtx);
5227                 } else
5228                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5229         }
5230
5231         sim = ccb_h->path->bus->sim;
5232
5233         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5234                 xpt_release_simq(sim, /*run_queue*/FALSE);
5235                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5236         }
5237
5238         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5239          && (ccb_h->status & CAM_DEV_QFRZN)) {
5240                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5241                 ccb_h->status &= ~CAM_DEV_QFRZN;
5242         }
5243
5244         devq = sim->devq;
5245         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5246                 struct cam_ed *dev = ccb_h->path->device;
5247
5248                 mtx_lock(&devq->send_mtx);
5249                 devq->send_active--;
5250                 devq->send_openings++;
5251                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5252
5253                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5254                   && (dev->ccbq.dev_active == 0))) {
5255                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5256                         xpt_release_devq_device(dev, /*count*/1,
5257                                          /*run_queue*/FALSE);
5258                 }
5259
5260                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5261                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5262                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5263                         xpt_release_devq_device(dev, /*count*/1,
5264                                          /*run_queue*/FALSE);
5265                 }
5266
5267                 if (!device_is_queued(dev))
5268                         (void)xpt_schedule_devq(devq, dev);
5269                 xpt_run_devq(devq);
5270                 mtx_unlock(&devq->send_mtx);
5271
5272                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5273                         mtx = xpt_path_mtx(ccb_h->path);
5274                         mtx_lock(mtx);
5275
5276                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5277                          && (--dev->tag_delay_count == 0))
5278                                 xpt_start_tags(ccb_h->path);
5279                 }
5280         }
5281
5282         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5283                 if (mtx == NULL) {
5284                         mtx = xpt_path_mtx(ccb_h->path);
5285                         mtx_lock(mtx);
5286                 }
5287         } else {
5288                 if (mtx != NULL) {
5289                         mtx_unlock(mtx);
5290                         mtx = NULL;
5291                 }
5292         }
5293
5294         /* Call the peripheral driver's callback */
5295         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5296         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5297         if (mtx != NULL)
5298                 mtx_unlock(mtx);
5299 }
5300
5301 void
5302 xpt_done_td(void *arg)
5303 {
5304         struct cam_doneq *queue = arg;
5305         struct ccb_hdr *ccb_h;
5306         STAILQ_HEAD(, ccb_hdr)  doneq;
5307
5308         STAILQ_INIT(&doneq);
5309         mtx_lock(&queue->cam_doneq_mtx);
5310         while (1) {
5311                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5312                         queue->cam_doneq_sleep = 1;
5313                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5314                             PRIBIO, "-", 0);
5315                         queue->cam_doneq_sleep = 0;
5316                 }
5317                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5318                 mtx_unlock(&queue->cam_doneq_mtx);
5319
5320                 THREAD_NO_SLEEPING();
5321                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5322                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5323                         xpt_done_process(ccb_h);
5324                 }
5325                 THREAD_SLEEPING_OK();
5326
5327                 mtx_lock(&queue->cam_doneq_mtx);
5328         }
5329 }
5330
5331 static void
5332 camisr_runqueue(void)
5333 {
5334         struct  ccb_hdr *ccb_h;
5335         struct cam_doneq *queue;
5336         int i;
5337
5338         /* Process global queues. */
5339         for (i = 0; i < cam_num_doneqs; i++) {
5340                 queue = &cam_doneqs[i];
5341                 mtx_lock(&queue->cam_doneq_mtx);
5342                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5343                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5344                         mtx_unlock(&queue->cam_doneq_mtx);
5345                         xpt_done_process(ccb_h);
5346                         mtx_lock(&queue->cam_doneq_mtx);
5347                 }
5348                 mtx_unlock(&queue->cam_doneq_mtx);
5349         }
5350 }