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