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 "opt_printf.h"
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include <sys/param.h>
  36 #include <sys/bio.h>
  37 #include <sys/bus.h>
  38 #include <sys/systm.h>
  39 #include <sys/types.h>
  40 #include <sys/malloc.h>
  41 #include <sys/kernel.h>
  42 #include <sys/time.h>
  43 #include <sys/conf.h>
  44 #include <sys/fcntl.h>
  45 #include <sys/interrupt.h>
  46 #include <sys/proc.h>
  47 #include <sys/sbuf.h>
  48 #include <sys/smp.h>
  49 #include <sys/taskqueue.h>
  50
  51 #include <sys/lock.h>
  52 #include <sys/mutex.h>
  53 #include <sys/sysctl.h>
  54 #include <sys/kthread.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_periph.h>
  59 #include <cam/cam_queue.h>
  60 #include <cam/cam_sim.h>
  61 #include <cam/cam_xpt.h>
  62 #include <cam/cam_xpt_sim.h>
  63 #include <cam/cam_xpt_periph.h>
  64 #include <cam/cam_xpt_internal.h>
  65 #include <cam/cam_debug.h>
  66 #include <cam/cam_compat.h>
  67
  68 #include <cam/scsi/scsi_all.h>
  69 #include <cam/scsi/scsi_message.h>
  70 #include <cam/scsi/scsi_pass.h>
  71
  72 #include <machine/md_var.h>     /* geometry translation */
  73 #include <machine/stdarg.h>     /* for xpt_print below */
  74
  75 #include "opt_cam.h"
  76
  77 /* Wild guess based on not wanting to grow the stack too much */
  78 #define XPT_PRINT_MAXLEN        512
  79 #ifdef PRINTF_BUFR_SIZE
  80 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  81 #else
  82 #define XPT_PRINT_LEN   128
  83 #endif
  84 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  85
  86 /*
  87  * This is the maximum number of high powered commands (e.g. start unit)
  88  * that can be outstanding at a particular time.
  89  */
  90 #ifndef CAM_MAX_HIGHPOWER
  91 #define CAM_MAX_HIGHPOWER  4
  92 #endif
  93
  94 /* Datastructures internal to the xpt layer */
  95 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  96 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  97 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  98 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  99
 100 /* Object for defering XPT actions to a taskqueue */
 101 struct xpt_task {
 102         struct task     task;
 103         void            *data1;
 104         uintptr_t       data2;
 105 };
 106
 107 struct xpt_softc {
 108         uint32_t                xpt_generation;
 109
 110         /* number of high powered commands that can go through right now */
 111         struct mtx              xpt_highpower_lock;
 112         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 113         int                     num_highpower;
 114
 115         /* queue for handling async rescan requests. */
 116         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 117         int buses_to_config;
 118         int buses_config_done;
 119
 120         /*
 121          * Registered buses
 122          *
 123          * N.B., "busses" is an archaic spelling of "buses".  In new code
 124          * "buses" is preferred.
 125          */
 126         TAILQ_HEAD(,cam_eb)     xpt_busses;
 127         u_int                   bus_generation;
 128
 129         struct intr_config_hook *xpt_config_hook;
 130
 131         int                     boot_delay;
 132         struct callout          boot_callout;
 133
 134         struct mtx              xpt_topo_lock;
 135         struct mtx              xpt_lock;
 136         struct taskqueue        *xpt_taskq;
 137 };
 138
 139 typedef enum {
 140         DM_RET_COPY             = 0x01,
 141         DM_RET_FLAG_MASK        = 0x0f,
 142         DM_RET_NONE             = 0x00,
 143         DM_RET_STOP             = 0x10,
 144         DM_RET_DESCEND          = 0x20,
 145         DM_RET_ERROR            = 0x30,
 146         DM_RET_ACTION_MASK      = 0xf0
 147 } dev_match_ret;
 148
 149 typedef enum {
 150         XPT_DEPTH_BUS,
 151         XPT_DEPTH_TARGET,
 152         XPT_DEPTH_DEVICE,
 153         XPT_DEPTH_PERIPH
 154 } xpt_traverse_depth;
 155
 156 struct xpt_traverse_config {
 157         xpt_traverse_depth      depth;
 158         void                    *tr_func;
 159         void                    *tr_arg;
 160 };
 161
 162 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 163 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 164 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 165 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 166 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 167
 168 /* Transport layer configuration information */
 169 static struct xpt_softc xsoftc;
 170
 171 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 172
 173 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 174            &xsoftc.boot_delay, 0, "Bus registration wait time");
 175 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 176             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 177
 178 struct cam_doneq {
 179         struct mtx_padalign     cam_doneq_mtx;
 180         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 181         int                     cam_doneq_sleep;
 182 };
 183
 184 static struct cam_doneq cam_doneqs[MAXCPU];
 185 static int cam_num_doneqs;
 186 static struct proc *cam_proc;
 187
 188 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 189            &cam_num_doneqs, 0, "Number of completion queues/threads");
 190
 191 struct cam_periph *xpt_periph;
 192
 193 static periph_init_t xpt_periph_init;
 194
 195 static struct periph_driver xpt_driver =
 196 {
 197         xpt_periph_init, "xpt",
 198         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 199         CAM_PERIPH_DRV_EARLY
 200 };
 201
 202 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 203
 204 static d_open_t xptopen;
 205 static d_close_t xptclose;
 206 static d_ioctl_t xptioctl;
 207 static d_ioctl_t xptdoioctl;
 208
 209 static struct cdevsw xpt_cdevsw = {
 210         .d_version =    D_VERSION,
 211         .d_flags =      0,
 212         .d_open =       xptopen,
 213         .d_close =      xptclose,
 214         .d_ioctl =      xptioctl,
 215         .d_name =       "xpt",
 216 };
 217
 218 /* Storage for debugging datastructures */
 219 struct cam_path *cam_dpath;
 220 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 221 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 222         &cam_dflags, 0, "Enabled debug flags");
 223 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 224 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 225         &cam_debug_delay, 0, "Delay in us after each debug message");
 226
 227 /* Our boot-time initialization hook */
 228 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 229
 230 static moduledata_t cam_moduledata = {
 231         "cam",
 232         cam_module_event_handler,
 233         NULL
 234 };
 235
 236 static int      xpt_init(void *);
 237
 238 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 239 MODULE_VERSION(cam, 1);
 240
 241
 242 static void             xpt_async_bcast(struct async_list *async_head,
 243                                         u_int32_t async_code,
 244                                         struct cam_path *path,
 245                                         void *async_arg);
 246 static path_id_t xptnextfreepathid(void);
 247 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 248 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 249 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 250 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 251 static void      xpt_run_allocq_task(void *context, int pending);
 252 static void      xpt_run_devq(struct cam_devq *devq);
 253 static timeout_t xpt_release_devq_timeout;
 254 static void      xpt_release_simq_timeout(void *arg) __unused;
 255 static void      xpt_acquire_bus(struct cam_eb *bus);
 256 static void      xpt_release_bus(struct cam_eb *bus);
 257 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 258 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 259                     int run_queue);
 260 static struct cam_et*
 261                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 262 static void      xpt_acquire_target(struct cam_et *target);
 263 static void      xpt_release_target(struct cam_et *target);
 264 static struct cam_eb*
 265                  xpt_find_bus(path_id_t path_id);
 266 static struct cam_et*
 267                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 268 static struct cam_ed*
 269                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 270 static void      xpt_config(void *arg);
 271 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 272                                  u_int32_t new_priority);
 273 static xpt_devicefunc_t xptpassannouncefunc;
 274 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 275 static void      xptpoll(struct cam_sim *sim);
 276 static void      camisr_runqueue(void);
 277 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 278 static void      xpt_done_td(void *);
 279 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 280                                     u_int num_patterns, struct cam_eb *bus);
 281 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 282                                        u_int num_patterns,
 283                                        struct cam_ed *device);
 284 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 285                                        u_int num_patterns,
 286                                        struct cam_periph *periph);
 287 static xpt_busfunc_t    xptedtbusfunc;
 288 static xpt_targetfunc_t xptedttargetfunc;
 289 static xpt_devicefunc_t xptedtdevicefunc;
 290 static xpt_periphfunc_t xptedtperiphfunc;
 291 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 292 static xpt_periphfunc_t xptplistperiphfunc;
 293 static int              xptedtmatch(struct ccb_dev_match *cdm);
 294 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 295 static int              xptbustraverse(struct cam_eb *start_bus,
 296                                        xpt_busfunc_t *tr_func, void *arg);
 297 static int              xpttargettraverse(struct cam_eb *bus,
 298                                           struct cam_et *start_target,
 299                                           xpt_targetfunc_t *tr_func, void *arg);
 300 static int              xptdevicetraverse(struct cam_et *target,
 301                                           struct cam_ed *start_device,
 302                                           xpt_devicefunc_t *tr_func, void *arg);
 303 static int              xptperiphtraverse(struct cam_ed *device,
 304                                           struct cam_periph *start_periph,
 305                                           xpt_periphfunc_t *tr_func, void *arg);
 306 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 307                                         xpt_pdrvfunc_t *tr_func, void *arg);
 308 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 309                                             struct cam_periph *start_periph,
 310                                             xpt_periphfunc_t *tr_func,
 311                                             void *arg);
 312 static xpt_busfunc_t    xptdefbusfunc;
 313 static xpt_targetfunc_t xptdeftargetfunc;
 314 static xpt_devicefunc_t xptdefdevicefunc;
 315 static xpt_periphfunc_t xptdefperiphfunc;
 316 static void             xpt_finishconfig_task(void *context, int pending);
 317 static void             xpt_dev_async_default(u_int32_t async_code,
 318                                               struct cam_eb *bus,
 319                                               struct cam_et *target,
 320                                               struct cam_ed *device,
 321                                               void *async_arg);
 322 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 323                                                  struct cam_et *target,
 324                                                  lun_id_t lun_id);
 325 static xpt_devicefunc_t xptsetasyncfunc;
 326 static xpt_busfunc_t    xptsetasyncbusfunc;
 327 static cam_status       xptregister(struct cam_periph *periph,
 328                                     void *arg);
 329 static const char *     xpt_action_name(uint32_t action);
 330 static __inline int device_is_queued(struct cam_ed *device);
 331
 332 static __inline int
 333 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 334 {
 335         int     retval;
 336
 337         mtx_assert(&devq->send_mtx, MA_OWNED);
 338         if ((dev->ccbq.queue.entries > 0) &&
 339             (dev->ccbq.dev_openings > 0) &&
 340             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 341                 /*
 342                  * The priority of a device waiting for controller
 343                  * resources is that of the highest priority CCB
 344                  * enqueued.
 345                  */
 346                 retval =
 347                     xpt_schedule_dev(&devq->send_queue,
 348                                      &dev->devq_entry,
 349                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 350         } else {
 351                 retval = 0;
 352         }
 353         return (retval);
 354 }
 355
 356 static __inline int
 357 device_is_queued(struct cam_ed *device)
 358 {
 359         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 360 }
 361
 362 static void
 363 xpt_periph_init()
 364 {
 365         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 366 }
 367
 368 static int
 369 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 370 {
 371
 372         /*
 373          * Only allow read-write access.
 374          */
 375         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 376                 return(EPERM);
 377
 378         /*
 379          * We don't allow nonblocking access.
 380          */
 381         if ((flags & O_NONBLOCK) != 0) {
 382                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 383                 return(ENODEV);
 384         }
 385
 386         return(0);
 387 }
 388
 389 static int
 390 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 391 {
 392
 393         return(0);
 394 }
 395
 396 /*
 397  * Don't automatically grab the xpt softc lock here even though this is going
 398  * through the xpt device.  The xpt device is really just a back door for
 399  * accessing other devices and SIMs, so the right thing to do is to grab
 400  * the appropriate SIM lock once the bus/SIM is located.
 401  */
 402 static int
 403 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 404 {
 405         int error;
 406
 407         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 408                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 409         }
 410         return (error);
 411 }
 412
 413 static int
 414 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 415 {
 416         int error;
 417
 418         error = 0;
 419
 420         switch(cmd) {
 421         /*
 422          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 423          * to accept CCB types that don't quite make sense to send through a
 424          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 425          * in the CAM spec.
 426          */
 427         case CAMIOCOMMAND: {
 428                 union ccb *ccb;
 429                 union ccb *inccb;
 430                 struct cam_eb *bus;
 431
 432                 inccb = (union ccb *)addr;
 433 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 434                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 435                         inccb->csio.bio = NULL;
 436 #endif
 437
 438                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 439                         return (EINVAL);
 440
 441                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 442                 if (bus == NULL)
 443                         return (EINVAL);
 444
 445                 switch (inccb->ccb_h.func_code) {
 446                 case XPT_SCAN_BUS:
 447                 case XPT_RESET_BUS:
 448                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 449                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 450                                 xpt_release_bus(bus);
 451                                 return (EINVAL);
 452                         }
 453                         break;
 454                 case XPT_SCAN_TGT:
 455                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 456                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 457                                 xpt_release_bus(bus);
 458                                 return (EINVAL);
 459                         }
 460                         break;
 461                 default:
 462                         break;
 463                 }
 464
 465                 switch(inccb->ccb_h.func_code) {
 466                 case XPT_SCAN_BUS:
 467                 case XPT_RESET_BUS:
 468                 case XPT_PATH_INQ:
 469                 case XPT_ENG_INQ:
 470                 case XPT_SCAN_LUN:
 471                 case XPT_SCAN_TGT:
 472
 473                         ccb = xpt_alloc_ccb();
 474
 475                         /*
 476                          * Create a path using the bus, target, and lun the
 477                          * user passed in.
 478                          */
 479                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 480                                             inccb->ccb_h.path_id,
 481                                             inccb->ccb_h.target_id,
 482                                             inccb->ccb_h.target_lun) !=
 483                                             CAM_REQ_CMP){
 484                                 error = EINVAL;
 485                                 xpt_free_ccb(ccb);
 486                                 break;
 487                         }
 488                         /* Ensure all of our fields are correct */
 489                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 490                                       inccb->ccb_h.pinfo.priority);
 491                         xpt_merge_ccb(ccb, inccb);
 492                         xpt_path_lock(ccb->ccb_h.path);
 493                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 494                         xpt_path_unlock(ccb->ccb_h.path);
 495                         bcopy(ccb, inccb, sizeof(union ccb));
 496                         xpt_free_path(ccb->ccb_h.path);
 497                         xpt_free_ccb(ccb);
 498                         break;
 499
 500                 case XPT_DEBUG: {
 501                         union ccb ccb;
 502
 503                         /*
 504                          * This is an immediate CCB, so it's okay to
 505                          * allocate it on the stack.
 506                          */
 507
 508                         /*
 509                          * Create a path using the bus, target, and lun the
 510                          * user passed in.
 511                          */
 512                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 513                                             inccb->ccb_h.path_id,
 514                                             inccb->ccb_h.target_id,
 515                                             inccb->ccb_h.target_lun) !=
 516                                             CAM_REQ_CMP){
 517                                 error = EINVAL;
 518                                 break;
 519                         }
 520                         /* Ensure all of our fields are correct */
 521                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 522                                       inccb->ccb_h.pinfo.priority);
 523                         xpt_merge_ccb(&ccb, inccb);
 524                         xpt_action(&ccb);
 525                         bcopy(&ccb, inccb, sizeof(union ccb));
 526                         xpt_free_path(ccb.ccb_h.path);
 527                         break;
 528
 529                 }
 530                 case XPT_DEV_MATCH: {
 531                         struct cam_periph_map_info mapinfo;
 532                         struct cam_path *old_path;
 533
 534                         /*
 535                          * We can't deal with physical addresses for this
 536                          * type of transaction.
 537                          */
 538                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 539                             CAM_DATA_VADDR) {
 540                                 error = EINVAL;
 541                                 break;
 542                         }
 543
 544                         /*
 545                          * Save this in case the caller had it set to
 546                          * something in particular.
 547                          */
 548                         old_path = inccb->ccb_h.path;
 549
 550                         /*
 551                          * We really don't need a path for the matching
 552                          * code.  The path is needed because of the
 553                          * debugging statements in xpt_action().  They
 554                          * assume that the CCB has a valid path.
 555                          */
 556                         inccb->ccb_h.path = xpt_periph->path;
 557
 558                         bzero(&mapinfo, sizeof(mapinfo));
 559
 560                         /*
 561                          * Map the pattern and match buffers into kernel
 562                          * virtual address space.
 563                          */
 564                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 565
 566                         if (error) {
 567                                 inccb->ccb_h.path = old_path;
 568                                 break;
 569                         }
 570
 571                         /*
 572                          * This is an immediate CCB, we can send it on directly.
 573                          */
 574                         xpt_action(inccb);
 575
 576                         /*
 577                          * Map the buffers back into user space.
 578                          */
 579                         cam_periph_unmapmem(inccb, &mapinfo);
 580
 581                         inccb->ccb_h.path = old_path;
 582
 583                         error = 0;
 584                         break;
 585                 }
 586                 default:
 587                         error = ENOTSUP;
 588                         break;
 589                 }
 590                 xpt_release_bus(bus);
 591                 break;
 592         }
 593         /*
 594          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 595          * with the periphal driver name and unit name filled in.  The other
 596          * fields don't really matter as input.  The passthrough driver name
 597          * ("pass"), and unit number are passed back in the ccb.  The current
 598          * device generation number, and the index into the device peripheral
 599          * driver list, and the status are also passed back.  Note that
 600          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 601          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 602          * (or rather should be) impossible for the device peripheral driver
 603          * list to change since we look at the whole thing in one pass, and
 604          * we do it with lock protection.
 605          *
 606          */
 607         case CAMGETPASSTHRU: {
 608                 union ccb *ccb;
 609                 struct cam_periph *periph;
 610                 struct periph_driver **p_drv;
 611                 char   *name;
 612                 u_int unit;
 613                 int base_periph_found;
 614
 615                 ccb = (union ccb *)addr;
 616                 unit = ccb->cgdl.unit_number;
 617                 name = ccb->cgdl.periph_name;
 618                 base_periph_found = 0;
 619 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 620                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 621                         ccb->csio.bio = NULL;
 622 #endif
 623
 624                 /*
 625                  * Sanity check -- make sure we don't get a null peripheral
 626                  * driver name.
 627                  */
 628                 if (*ccb->cgdl.periph_name == '\0') {
 629                         error = EINVAL;
 630                         break;
 631                 }
 632
 633                 /* Keep the list from changing while we traverse it */
 634                 xpt_lock_buses();
 635
 636                 /* first find our driver in the list of drivers */
 637                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 638                         if (strcmp((*p_drv)->driver_name, name) == 0)
 639                                 break;
 640
 641                 if (*p_drv == NULL) {
 642                         xpt_unlock_buses();
 643                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 644                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 645                         *ccb->cgdl.periph_name = '\0';
 646                         ccb->cgdl.unit_number = 0;
 647                         error = ENOENT;
 648                         break;
 649                 }
 650
 651                 /*
 652                  * Run through every peripheral instance of this driver
 653                  * and check to see whether it matches the unit passed
 654                  * in by the user.  If it does, get out of the loops and
 655                  * find the passthrough driver associated with that
 656                  * peripheral driver.
 657                  */
 658                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 659                      periph = TAILQ_NEXT(periph, unit_links)) {
 660
 661                         if (periph->unit_number == unit)
 662                                 break;
 663                 }
 664                 /*
 665                  * If we found the peripheral driver that the user passed
 666                  * in, go through all of the peripheral drivers for that
 667                  * particular device and look for a passthrough driver.
 668                  */
 669                 if (periph != NULL) {
 670                         struct cam_ed *device;
 671                         int i;
 672
 673                         base_periph_found = 1;
 674                         device = periph->path->device;
 675                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 676                              periph != NULL;
 677                              periph = SLIST_NEXT(periph, periph_links), i++) {
 678                                 /*
 679                                  * Check to see whether we have a
 680                                  * passthrough device or not.
 681                                  */
 682                                 if (strcmp(periph->periph_name, "pass") == 0) {
 683                                         /*
 684                                          * Fill in the getdevlist fields.
 685                                          */
 686                                         strcpy(ccb->cgdl.periph_name,
 687                                                periph->periph_name);
 688                                         ccb->cgdl.unit_number =
 689                                                 periph->unit_number;
 690                                         if (SLIST_NEXT(periph, periph_links))
 691                                                 ccb->cgdl.status =
 692                                                         CAM_GDEVLIST_MORE_DEVS;
 693                                         else
 694                                                 ccb->cgdl.status =
 695                                                        CAM_GDEVLIST_LAST_DEVICE;
 696                                         ccb->cgdl.generation =
 697                                                 device->generation;
 698                                         ccb->cgdl.index = i;
 699                                         /*
 700                                          * Fill in some CCB header fields
 701                                          * that the user may want.
 702                                          */
 703                                         ccb->ccb_h.path_id =
 704                                                 periph->path->bus->path_id;
 705                                         ccb->ccb_h.target_id =
 706                                                 periph->path->target->target_id;
 707                                         ccb->ccb_h.target_lun =
 708                                                 periph->path->device->lun_id;
 709                                         ccb->ccb_h.status = CAM_REQ_CMP;
 710                                         break;
 711                                 }
 712                         }
 713                 }
 714
 715                 /*
 716                  * If the periph is null here, one of two things has
 717                  * happened.  The first possibility is that we couldn't
 718                  * find the unit number of the particular peripheral driver
 719                  * that the user is asking about.  e.g. the user asks for
 720                  * the passthrough driver for "da11".  We find the list of
 721                  * "da" peripherals all right, but there is no unit 11.
 722                  * The other possibility is that we went through the list
 723                  * of peripheral drivers attached to the device structure,
 724                  * but didn't find one with the name "pass".  Either way,
 725                  * we return ENOENT, since we couldn't find something.
 726                  */
 727                 if (periph == NULL) {
 728                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 729                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 730                         *ccb->cgdl.periph_name = '\0';
 731                         ccb->cgdl.unit_number = 0;
 732                         error = ENOENT;
 733                         /*
 734                          * It is unfortunate that this is even necessary,
 735                          * but there are many, many clueless users out there.
 736                          * If this is true, the user is looking for the
 737                          * passthrough driver, but doesn't have one in his
 738                          * kernel.
 739                          */
 740                         if (base_periph_found == 1) {
 741                                 printf("xptioctl: pass driver is not in the "
 742                                        "kernel\n");
 743                                 printf("xptioctl: put \"device pass\" in "
 744                                        "your kernel config file\n");
 745                         }
 746                 }
 747                 xpt_unlock_buses();
 748                 break;
 749                 }
 750         default:
 751                 error = ENOTTY;
 752                 break;
 753         }
 754
 755         return(error);
 756 }
 757
 758 static int
 759 cam_module_event_handler(module_t mod, int what, void *arg)
 760 {
 761         int error;
 762
 763         switch (what) {
 764         case MOD_LOAD:
 765                 if ((error = xpt_init(NULL)) != 0)
 766                         return (error);
 767                 break;
 768         case MOD_UNLOAD:
 769                 return EBUSY;
 770         default:
 771                 return EOPNOTSUPP;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static struct xpt_proto *
 778 xpt_proto_find(cam_proto proto)
 779 {
 780         struct xpt_proto **pp;
 781
 782         SET_FOREACH(pp, cam_xpt_proto_set) {
 783                 if ((*pp)->proto == proto)
 784                         return *pp;
 785         }
 786
 787         return NULL;
 788 }
 789
 790 static void
 791 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 792 {
 793
 794         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 795                 xpt_free_path(done_ccb->ccb_h.path);
 796                 xpt_free_ccb(done_ccb);
 797         } else {
 798                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 799                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 800         }
 801         xpt_release_boot();
 802 }
 803
 804 /* thread to handle bus rescans */
 805 static void
 806 xpt_scanner_thread(void *dummy)
 807 {
 808         union ccb       *ccb;
 809         struct cam_path  path;
 810
 811         xpt_lock_buses();
 812         for (;;) {
 813                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 814                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 815                                "-", 0);
 816                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 817                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 818                         xpt_unlock_buses();
 819
 820                         /*
 821                          * Since lock can be dropped inside and path freed
 822                          * by completion callback even before return here,
 823                          * take our own path copy for reference.
 824                          */
 825                         xpt_copy_path(&path, ccb->ccb_h.path);
 826                         xpt_path_lock(&path);
 827                         xpt_action(ccb);
 828                         xpt_path_unlock(&path);
 829                         xpt_release_path(&path);
 830
 831                         xpt_lock_buses();
 832                 }
 833         }
 834 }
 835
 836 void
 837 xpt_rescan(union ccb *ccb)
 838 {
 839         struct ccb_hdr *hdr;
 840
 841         /* Prepare request */
 842         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 843             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 844                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 845         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 846             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 847                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 848         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 849             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 850                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 851         else {
 852                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 853                 xpt_free_path(ccb->ccb_h.path);
 854                 xpt_free_ccb(ccb);
 855                 return;
 856         }
 857         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 858             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 859                 xpt_action_name(ccb->ccb_h.func_code)));
 860
 861         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 862         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 863         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 864         /* Don't make duplicate entries for the same paths. */
 865         xpt_lock_buses();
 866         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 867                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 868                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 869                                 wakeup(&xsoftc.ccb_scanq);
 870                                 xpt_unlock_buses();
 871                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 872                                 xpt_free_path(ccb->ccb_h.path);
 873                                 xpt_free_ccb(ccb);
 874                                 return;
 875                         }
 876                 }
 877         }
 878         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 879         xsoftc.buses_to_config++;
 880         wakeup(&xsoftc.ccb_scanq);
 881         xpt_unlock_buses();
 882 }
 883
 884 /* Functions accessed by the peripheral drivers */
 885 static int
 886 xpt_init(void *dummy)
 887 {
 888         struct cam_sim *xpt_sim;
 889         struct cam_path *path;
 890         struct cam_devq *devq;
 891         cam_status status;
 892         int error, i;
 893
 894         TAILQ_INIT(&xsoftc.xpt_busses);
 895         TAILQ_INIT(&xsoftc.ccb_scanq);
 896         STAILQ_INIT(&xsoftc.highpowerq);
 897         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 898
 899         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 900         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 901         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 902             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 903
 904 #ifdef CAM_BOOT_DELAY
 905         /*
 906          * Override this value at compile time to assist our users
 907          * who don't use loader to boot a kernel.
 908          */
 909         xsoftc.boot_delay = CAM_BOOT_DELAY;
 910 #endif
 911         /*
 912          * The xpt layer is, itself, the equivalent of a SIM.
 913          * Allow 16 ccbs in the ccb pool for it.  This should
 914          * give decent parallelism when we probe buses and
 915          * perform other XPT functions.
 916          */
 917         devq = cam_simq_alloc(16);
 918         xpt_sim = cam_sim_alloc(xptaction,
 919                                 xptpoll,
 920                                 "xpt",
 921                                 /*softc*/NULL,
 922                                 /*unit*/0,
 923                                 /*mtx*/&xsoftc.xpt_lock,
 924                                 /*max_dev_transactions*/0,
 925                                 /*max_tagged_dev_transactions*/0,
 926                                 devq);
 927         if (xpt_sim == NULL)
 928                 return (ENOMEM);
 929
 930         mtx_lock(&xsoftc.xpt_lock);
 931         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 932                 mtx_unlock(&xsoftc.xpt_lock);
 933                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 934                        " failing attach\n", status);
 935                 return (EINVAL);
 936         }
 937         mtx_unlock(&xsoftc.xpt_lock);
 938
 939         /*
 940          * Looking at the XPT from the SIM layer, the XPT is
 941          * the equivalent of a peripheral driver.  Allocate
 942          * a peripheral driver entry for us.
 943          */
 944         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 945                                       CAM_TARGET_WILDCARD,
 946                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 947                 printf("xpt_init: xpt_create_path failed with status %#x,"
 948                        " failing attach\n", status);
 949                 return (EINVAL);
 950         }
 951         xpt_path_lock(path);
 952         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 953                          path, NULL, 0, xpt_sim);
 954         xpt_path_unlock(path);
 955         xpt_free_path(path);
 956
 957         if (cam_num_doneqs < 1)
 958                 cam_num_doneqs = 1 + mp_ncpus / 6;
 959         else if (cam_num_doneqs > MAXCPU)
 960                 cam_num_doneqs = MAXCPU;
 961         for (i = 0; i < cam_num_doneqs; i++) {
 962                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 963                     MTX_DEF);
 964                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 965                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 966                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 967                 if (error != 0) {
 968                         cam_num_doneqs = i;
 969                         break;
 970                 }
 971         }
 972         if (cam_num_doneqs < 1) {
 973                 printf("xpt_init: Cannot init completion queues "
 974                        "- failing attach\n");
 975                 return (ENOMEM);
 976         }
 977         /*
 978          * Register a callback for when interrupts are enabled.
 979          */
 980         xsoftc.xpt_config_hook =
 981             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 982                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 983         if (xsoftc.xpt_config_hook == NULL) {
 984                 printf("xpt_init: Cannot malloc config hook "
 985                        "- failing attach\n");
 986                 return (ENOMEM);
 987         }
 988         xsoftc.xpt_config_hook->ich_func = xpt_config;
 989         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 990                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 991                 printf("xpt_init: config_intrhook_establish failed "
 992                        "- failing attach\n");
 993         }
 994
 995         return (0);
 996 }
 997
 998 static cam_status
 999 xptregister(struct cam_periph *periph, void *arg)
1000 {
1001         struct cam_sim *xpt_sim;
1002
1003         if (periph == NULL) {
1004                 printf("xptregister: periph was NULL!!\n");
1005                 return(CAM_REQ_CMP_ERR);
1006         }
1007
1008         xpt_sim = (struct cam_sim *)arg;
1009         xpt_sim->softc = periph;
1010         xpt_periph = periph;
1011         periph->softc = NULL;
1012
1013         return(CAM_REQ_CMP);
1014 }
1015
1016 int32_t
1017 xpt_add_periph(struct cam_periph *periph)
1018 {
1019         struct cam_ed *device;
1020         int32_t  status;
1021
1022         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1023         device = periph->path->device;
1024         status = CAM_REQ_CMP;
1025         if (device != NULL) {
1026                 mtx_lock(&device->target->bus->eb_mtx);
1027                 device->generation++;
1028                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1029                 mtx_unlock(&device->target->bus->eb_mtx);
1030                 atomic_add_32(&xsoftc.xpt_generation, 1);
1031         }
1032
1033         return (status);
1034 }
1035
1036 void
1037 xpt_remove_periph(struct cam_periph *periph)
1038 {
1039         struct cam_ed *device;
1040
1041         device = periph->path->device;
1042         if (device != NULL) {
1043                 mtx_lock(&device->target->bus->eb_mtx);
1044                 device->generation++;
1045                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1046                 mtx_unlock(&device->target->bus->eb_mtx);
1047                 atomic_add_32(&xsoftc.xpt_generation, 1);
1048         }
1049 }
1050
1051
1052 void
1053 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1054 {
1055         struct  cam_path *path = periph->path;
1056         struct  xpt_proto *proto;
1057
1058         cam_periph_assert(periph, MA_OWNED);
1059         periph->flags |= CAM_PERIPH_ANNOUNCED;
1060
1061         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1062                periph->periph_name, periph->unit_number,
1063                path->bus->sim->sim_name,
1064                path->bus->sim->unit_number,
1065                path->bus->sim->bus_id,
1066                path->bus->path_id,
1067                path->target->target_id,
1068                (uintmax_t)path->device->lun_id);
1069         printf("%s%d: ", periph->periph_name, periph->unit_number);
1070         proto = xpt_proto_find(path->device->protocol);
1071         if (proto)
1072                 proto->ops->announce(path->device);
1073         else
1074                 printf("%s%d: Unknown protocol device %d\n",
1075                     periph->periph_name, periph->unit_number,
1076                     path->device->protocol);
1077         if (path->device->serial_num_len > 0) {
1078                 /* Don't wrap the screen  - print only the first 60 chars */
1079                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1080                        periph->unit_number, path->device->serial_num);
1081         }
1082         /* Announce transport details. */
1083         path->bus->xport->ops->announce(periph);
1084         /* Announce command queueing. */
1085         if (path->device->inq_flags & SID_CmdQue
1086          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1087                 printf("%s%d: Command Queueing enabled\n",
1088                        periph->periph_name, periph->unit_number);
1089         }
1090         /* Announce caller's details if they've passed in. */
1091         if (announce_string != NULL)
1092                 printf("%s%d: %s\n", periph->periph_name,
1093                        periph->unit_number, announce_string);
1094 }
1095
1096 void
1097 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1098 {
1099         if (quirks != 0) {
1100                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1101                     periph->unit_number, quirks, bit_string);
1102         }
1103 }
1104
1105 void
1106 xpt_denounce_periph(struct cam_periph *periph)
1107 {
1108         struct  cam_path *path = periph->path;
1109         struct  xpt_proto *proto;
1110
1111         cam_periph_assert(periph, MA_OWNED);
1112         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1113                periph->periph_name, periph->unit_number,
1114                path->bus->sim->sim_name,
1115                path->bus->sim->unit_number,
1116                path->bus->sim->bus_id,
1117                path->bus->path_id,
1118                path->target->target_id,
1119                (uintmax_t)path->device->lun_id);
1120         printf("%s%d: ", periph->periph_name, periph->unit_number);
1121         proto = xpt_proto_find(path->device->protocol);
1122         if (proto)
1123                 proto->ops->denounce(path->device);
1124         else
1125                 printf("%s%d: Unknown protocol device %d\n",
1126                     periph->periph_name, periph->unit_number,
1127                     path->device->protocol);
1128         if (path->device->serial_num_len > 0)
1129                 printf(" s/n %.60s", path->device->serial_num);
1130         printf(" detached\n");
1131 }
1132
1133
1134 int
1135 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1136 {
1137         int ret = -1, l, o;
1138         struct ccb_dev_advinfo cdai;
1139         struct scsi_vpd_id_descriptor *idd;
1140
1141         xpt_path_assert(path, MA_OWNED);
1142
1143         memset(&cdai, 0, sizeof(cdai));
1144         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1145         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1146         cdai.flags = CDAI_FLAG_NONE;
1147         cdai.bufsiz = len;
1148
1149         if (!strcmp(attr, "GEOM::ident"))
1150                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1151         else if (!strcmp(attr, "GEOM::physpath"))
1152                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1153         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1154                  strcmp(attr, "GEOM::lunname") == 0) {
1155                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1156                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1157         } else
1158                 goto out;
1159
1160         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1161         if (cdai.buf == NULL) {
1162                 ret = ENOMEM;
1163                 goto out;
1164         }
1165         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1166         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1167                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1168         if (cdai.provsiz == 0)
1169                 goto out;
1170         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1171                 if (strcmp(attr, "GEOM::lunid") == 0) {
1172                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1173                             cdai.provsiz, scsi_devid_is_lun_naa);
1174                         if (idd == NULL)
1175                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1176                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1177                         if (idd == NULL)
1178                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1179                                     cdai.provsiz, scsi_devid_is_lun_uuid);
1180                         if (idd == NULL)
1181                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1182                                     cdai.provsiz, scsi_devid_is_lun_md5);
1183                 } else
1184                         idd = NULL;
1185                 if (idd == NULL)
1186                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1187                             cdai.provsiz, scsi_devid_is_lun_t10);
1188                 if (idd == NULL)
1189                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1190                             cdai.provsiz, scsi_devid_is_lun_name);
1191                 if (idd == NULL)
1192                         goto out;
1193                 ret = 0;
1194                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1195                         if (idd->length < len) {
1196                                 for (l = 0; l < idd->length; l++)
1197                                         buf[l] = idd->identifier[l] ?
1198                                             idd->identifier[l] : ' ';
1199                                 buf[l] = 0;
1200                         } else
1201                                 ret = EFAULT;
1202                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1203                         l = strnlen(idd->identifier, idd->length);
1204                         if (l < len) {
1205                                 bcopy(idd->identifier, buf, l);
1206                                 buf[l] = 0;
1207                         } else
1208                                 ret = EFAULT;
1209                 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1210                     && idd->identifier[0] == 0x10) {
1211                         if ((idd->length - 2) * 2 + 4 < len) {
1212                                 for (l = 2, o = 0; l < idd->length; l++) {
1213                                         if (l == 6 || l == 8 || l == 10 || l == 12)
1214                                             o += sprintf(buf + o, "-");
1215                                         o += sprintf(buf + o, "%02x",
1216                                             idd->identifier[l]);
1217                                 }
1218                         } else
1219                                 ret = EFAULT;
1220                 } else {
1221                         if (idd->length * 2 < len) {
1222                                 for (l = 0; l < idd->length; l++)
1223                                         sprintf(buf + l * 2, "%02x",
1224                                             idd->identifier[l]);
1225                         } else
1226                                 ret = EFAULT;
1227                 }
1228         } else {
1229                 ret = 0;
1230                 if (strlcpy(buf, cdai.buf, len) >= len)
1231                         ret = EFAULT;
1232         }
1233
1234 out:
1235         if (cdai.buf != NULL)
1236                 free(cdai.buf, M_CAMXPT);
1237         return ret;
1238 }
1239
1240 static dev_match_ret
1241 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1242             struct cam_eb *bus)
1243 {
1244         dev_match_ret retval;
1245         u_int i;
1246
1247         retval = DM_RET_NONE;
1248
1249         /*
1250          * If we aren't given something to match against, that's an error.
1251          */
1252         if (bus == NULL)
1253                 return(DM_RET_ERROR);
1254
1255         /*
1256          * If there are no match entries, then this bus matches no
1257          * matter what.
1258          */
1259         if ((patterns == NULL) || (num_patterns == 0))
1260                 return(DM_RET_DESCEND | DM_RET_COPY);
1261
1262         for (i = 0; i < num_patterns; i++) {
1263                 struct bus_match_pattern *cur_pattern;
1264
1265                 /*
1266                  * If the pattern in question isn't for a bus node, we
1267                  * aren't interested.  However, we do indicate to the
1268                  * calling routine that we should continue descending the
1269                  * tree, since the user wants to match against lower-level
1270                  * EDT elements.
1271                  */
1272                 if (patterns[i].type != DEV_MATCH_BUS) {
1273                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1274                                 retval |= DM_RET_DESCEND;
1275                         continue;
1276                 }
1277
1278                 cur_pattern = &patterns[i].pattern.bus_pattern;
1279
1280                 /*
1281                  * If they want to match any bus node, we give them any
1282                  * device node.
1283                  */
1284                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1285                         /* set the copy flag */
1286                         retval |= DM_RET_COPY;
1287
1288                         /*
1289                          * If we've already decided on an action, go ahead
1290                          * and return.
1291                          */
1292                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1293                                 return(retval);
1294                 }
1295
1296                 /*
1297                  * Not sure why someone would do this...
1298                  */
1299                 if (cur_pattern->flags == BUS_MATCH_NONE)
1300                         continue;
1301
1302                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1303                  && (cur_pattern->path_id != bus->path_id))
1304                         continue;
1305
1306                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1307                  && (cur_pattern->bus_id != bus->sim->bus_id))
1308                         continue;
1309
1310                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1311                  && (cur_pattern->unit_number != bus->sim->unit_number))
1312                         continue;
1313
1314                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1315                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1316                              DEV_IDLEN) != 0))
1317                         continue;
1318
1319                 /*
1320                  * If we get to this point, the user definitely wants
1321                  * information on this bus.  So tell the caller to copy the
1322                  * data out.
1323                  */
1324                 retval |= DM_RET_COPY;
1325
1326                 /*
1327                  * If the return action has been set to descend, then we
1328                  * know that we've already seen a non-bus matching
1329                  * expression, therefore we need to further descend the tree.
1330                  * This won't change by continuing around the loop, so we
1331                  * go ahead and return.  If we haven't seen a non-bus
1332                  * matching expression, we keep going around the loop until
1333                  * we exhaust the matching expressions.  We'll set the stop
1334                  * flag once we fall out of the loop.
1335                  */
1336                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1337                         return(retval);
1338         }
1339
1340         /*
1341          * If the return action hasn't been set to descend yet, that means
1342          * we haven't seen anything other than bus matching patterns.  So
1343          * tell the caller to stop descending the tree -- the user doesn't
1344          * want to match against lower level tree elements.
1345          */
1346         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1347                 retval |= DM_RET_STOP;
1348
1349         return(retval);
1350 }
1351
1352 static dev_match_ret
1353 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1354                struct cam_ed *device)
1355 {
1356         dev_match_ret retval;
1357         u_int i;
1358
1359         retval = DM_RET_NONE;
1360
1361         /*
1362          * If we aren't given something to match against, that's an error.
1363          */
1364         if (device == NULL)
1365                 return(DM_RET_ERROR);
1366
1367         /*
1368          * If there are no match entries, then this device matches no
1369          * matter what.
1370          */
1371         if ((patterns == NULL) || (num_patterns == 0))
1372                 return(DM_RET_DESCEND | DM_RET_COPY);
1373
1374         for (i = 0; i < num_patterns; i++) {
1375                 struct device_match_pattern *cur_pattern;
1376                 struct scsi_vpd_device_id *device_id_page;
1377
1378                 /*
1379                  * If the pattern in question isn't for a device node, we
1380                  * aren't interested.
1381                  */
1382                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1383                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1384                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1385                                 retval |= DM_RET_DESCEND;
1386                         continue;
1387                 }
1388
1389                 cur_pattern = &patterns[i].pattern.device_pattern;
1390
1391                 /* Error out if mutually exclusive options are specified. */
1392                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1393                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1394                         return(DM_RET_ERROR);
1395
1396                 /*
1397                  * If they want to match any device node, we give them any
1398                  * device node.
1399                  */
1400                 if (cur_pattern->flags == DEV_MATCH_ANY)
1401                         goto copy_dev_node;
1402
1403                 /*
1404                  * Not sure why someone would do this...
1405                  */
1406                 if (cur_pattern->flags == DEV_MATCH_NONE)
1407                         continue;
1408
1409                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1410                  && (cur_pattern->path_id != device->target->bus->path_id))
1411                         continue;
1412
1413                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1414                  && (cur_pattern->target_id != device->target->target_id))
1415                         continue;
1416
1417                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1418                  && (cur_pattern->target_lun != device->lun_id))
1419                         continue;
1420
1421                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1422                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1423                                     (caddr_t)&cur_pattern->data.inq_pat,
1424                                     1, sizeof(cur_pattern->data.inq_pat),
1425                                     scsi_static_inquiry_match) == NULL))
1426                         continue;
1427
1428                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1429                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1430                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1431                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1432                                       device->device_id_len
1433                                     - SVPD_DEVICE_ID_HDR_LEN,
1434                                       cur_pattern->data.devid_pat.id,
1435                                       cur_pattern->data.devid_pat.id_len) != 0))
1436                         continue;
1437
1438 copy_dev_node:
1439                 /*
1440                  * If we get to this point, the user definitely wants
1441                  * information on this device.  So tell the caller to copy
1442                  * the data out.
1443                  */
1444                 retval |= DM_RET_COPY;
1445
1446                 /*
1447                  * If the return action has been set to descend, then we
1448                  * know that we've already seen a peripheral matching
1449                  * expression, therefore we need to further descend the tree.
1450                  * This won't change by continuing around the loop, so we
1451                  * go ahead and return.  If we haven't seen a peripheral
1452                  * matching expression, we keep going around the loop until
1453                  * we exhaust the matching expressions.  We'll set the stop
1454                  * flag once we fall out of the loop.
1455                  */
1456                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1457                         return(retval);
1458         }
1459
1460         /*
1461          * If the return action hasn't been set to descend yet, that means
1462          * we haven't seen any peripheral matching patterns.  So tell the
1463          * caller to stop descending the tree -- the user doesn't want to
1464          * match against lower level tree elements.
1465          */
1466         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1467                 retval |= DM_RET_STOP;
1468
1469         return(retval);
1470 }
1471
1472 /*
1473  * Match a single peripheral against any number of match patterns.
1474  */
1475 static dev_match_ret
1476 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1477                struct cam_periph *periph)
1478 {
1479         dev_match_ret retval;
1480         u_int i;
1481
1482         /*
1483          * If we aren't given something to match against, that's an error.
1484          */
1485         if (periph == NULL)
1486                 return(DM_RET_ERROR);
1487
1488         /*
1489          * If there are no match entries, then this peripheral matches no
1490          * matter what.
1491          */
1492         if ((patterns == NULL) || (num_patterns == 0))
1493                 return(DM_RET_STOP | DM_RET_COPY);
1494
1495         /*
1496          * There aren't any nodes below a peripheral node, so there's no
1497          * reason to descend the tree any further.
1498          */
1499         retval = DM_RET_STOP;
1500
1501         for (i = 0; i < num_patterns; i++) {
1502                 struct periph_match_pattern *cur_pattern;
1503
1504                 /*
1505                  * If the pattern in question isn't for a peripheral, we
1506                  * aren't interested.
1507                  */
1508                 if (patterns[i].type != DEV_MATCH_PERIPH)
1509                         continue;
1510
1511                 cur_pattern = &patterns[i].pattern.periph_pattern;
1512
1513                 /*
1514                  * If they want to match on anything, then we will do so.
1515                  */
1516                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1517                         /* set the copy flag */
1518                         retval |= DM_RET_COPY;
1519
1520                         /*
1521                          * We've already set the return action to stop,
1522                          * since there are no nodes below peripherals in
1523                          * the tree.
1524                          */
1525                         return(retval);
1526                 }
1527
1528                 /*
1529                  * Not sure why someone would do this...
1530                  */
1531                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1532                         continue;
1533
1534                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1535                  && (cur_pattern->path_id != periph->path->bus->path_id))
1536                         continue;
1537
1538                 /*
1539                  * For the target and lun id's, we have to make sure the
1540                  * target and lun pointers aren't NULL.  The xpt peripheral
1541                  * has a wildcard target and device.
1542                  */
1543                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1544                  && ((periph->path->target == NULL)
1545                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1546                         continue;
1547
1548                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1549                  && ((periph->path->device == NULL)
1550                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1551                         continue;
1552
1553                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1554                  && (cur_pattern->unit_number != periph->unit_number))
1555                         continue;
1556
1557                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1558                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1559                              DEV_IDLEN) != 0))
1560                         continue;
1561
1562                 /*
1563                  * If we get to this point, the user definitely wants
1564                  * information on this peripheral.  So tell the caller to
1565                  * copy the data out.
1566                  */
1567                 retval |= DM_RET_COPY;
1568
1569                 /*
1570                  * The return action has already been set to stop, since
1571                  * peripherals don't have any nodes below them in the EDT.
1572                  */
1573                 return(retval);
1574         }
1575
1576         /*
1577          * If we get to this point, the peripheral that was passed in
1578          * doesn't match any of the patterns.
1579          */
1580         return(retval);
1581 }
1582
1583 static int
1584 xptedtbusfunc(struct cam_eb *bus, void *arg)
1585 {
1586         struct ccb_dev_match *cdm;
1587         struct cam_et *target;
1588         dev_match_ret retval;
1589
1590         cdm = (struct ccb_dev_match *)arg;
1591
1592         /*
1593          * If our position is for something deeper in the tree, that means
1594          * that we've already seen this node.  So, we keep going down.
1595          */
1596         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1597          && (cdm->pos.cookie.bus == bus)
1598          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1599          && (cdm->pos.cookie.target != NULL))
1600                 retval = DM_RET_DESCEND;
1601         else
1602                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1603
1604         /*
1605          * If we got an error, bail out of the search.
1606          */
1607         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1608                 cdm->status = CAM_DEV_MATCH_ERROR;
1609                 return(0);
1610         }
1611
1612         /*
1613          * If the copy flag is set, copy this bus out.
1614          */
1615         if (retval & DM_RET_COPY) {
1616                 int spaceleft, j;
1617
1618                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1619                         sizeof(struct dev_match_result));
1620
1621                 /*
1622                  * If we don't have enough space to put in another
1623                  * match result, save our position and tell the
1624                  * user there are more devices to check.
1625                  */
1626                 if (spaceleft < sizeof(struct dev_match_result)) {
1627                         bzero(&cdm->pos, sizeof(cdm->pos));
1628                         cdm->pos.position_type =
1629                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1630
1631                         cdm->pos.cookie.bus = bus;
1632                         cdm->pos.generations[CAM_BUS_GENERATION]=
1633                                 xsoftc.bus_generation;
1634                         cdm->status = CAM_DEV_MATCH_MORE;
1635                         return(0);
1636                 }
1637                 j = cdm->num_matches;
1638                 cdm->num_matches++;
1639                 cdm->matches[j].type = DEV_MATCH_BUS;
1640                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1641                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1642                 cdm->matches[j].result.bus_result.unit_number =
1643                         bus->sim->unit_number;
1644                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1645                         bus->sim->sim_name, DEV_IDLEN);
1646         }
1647
1648         /*
1649          * If the user is only interested in buses, there's no
1650          * reason to descend to the next level in the tree.
1651          */
1652         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1653                 return(1);
1654
1655         /*
1656          * If there is a target generation recorded, check it to
1657          * make sure the target list hasn't changed.
1658          */
1659         mtx_lock(&bus->eb_mtx);
1660         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1661          && (cdm->pos.cookie.bus == bus)
1662          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1663          && (cdm->pos.cookie.target != NULL)) {
1664                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1665                     bus->generation)) {
1666                         mtx_unlock(&bus->eb_mtx);
1667                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1668                         return (0);
1669                 }
1670                 target = (struct cam_et *)cdm->pos.cookie.target;
1671                 target->refcount++;
1672         } else
1673                 target = NULL;
1674         mtx_unlock(&bus->eb_mtx);
1675
1676         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1677 }
1678
1679 static int
1680 xptedttargetfunc(struct cam_et *target, void *arg)
1681 {
1682         struct ccb_dev_match *cdm;
1683         struct cam_eb *bus;
1684         struct cam_ed *device;
1685
1686         cdm = (struct ccb_dev_match *)arg;
1687         bus = target->bus;
1688
1689         /*
1690          * If there is a device list generation recorded, check it to
1691          * make sure the device list hasn't changed.
1692          */
1693         mtx_lock(&bus->eb_mtx);
1694         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1695          && (cdm->pos.cookie.bus == bus)
1696          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1697          && (cdm->pos.cookie.target == target)
1698          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1699          && (cdm->pos.cookie.device != NULL)) {
1700                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1701                     target->generation) {
1702                         mtx_unlock(&bus->eb_mtx);
1703                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1704                         return(0);
1705                 }
1706                 device = (struct cam_ed *)cdm->pos.cookie.device;
1707                 device->refcount++;
1708         } else
1709                 device = NULL;
1710         mtx_unlock(&bus->eb_mtx);
1711
1712         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1713 }
1714
1715 static int
1716 xptedtdevicefunc(struct cam_ed *device, void *arg)
1717 {
1718         struct cam_eb *bus;
1719         struct cam_periph *periph;
1720         struct ccb_dev_match *cdm;
1721         dev_match_ret retval;
1722
1723         cdm = (struct ccb_dev_match *)arg;
1724         bus = device->target->bus;
1725
1726         /*
1727          * If our position is for something deeper in the tree, that means
1728          * that we've already seen this node.  So, we keep going down.
1729          */
1730         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1731          && (cdm->pos.cookie.device == device)
1732          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1733          && (cdm->pos.cookie.periph != NULL))
1734                 retval = DM_RET_DESCEND;
1735         else
1736                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1737                                         device);
1738
1739         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1740                 cdm->status = CAM_DEV_MATCH_ERROR;
1741                 return(0);
1742         }
1743
1744         /*
1745          * If the copy flag is set, copy this device out.
1746          */
1747         if (retval & DM_RET_COPY) {
1748                 int spaceleft, j;
1749
1750                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1751                         sizeof(struct dev_match_result));
1752
1753                 /*
1754                  * If we don't have enough space to put in another
1755                  * match result, save our position and tell the
1756                  * user there are more devices to check.
1757                  */
1758                 if (spaceleft < sizeof(struct dev_match_result)) {
1759                         bzero(&cdm->pos, sizeof(cdm->pos));
1760                         cdm->pos.position_type =
1761                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1762                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1763
1764                         cdm->pos.cookie.bus = device->target->bus;
1765                         cdm->pos.generations[CAM_BUS_GENERATION]=
1766                                 xsoftc.bus_generation;
1767                         cdm->pos.cookie.target = device->target;
1768                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1769                                 device->target->bus->generation;
1770                         cdm->pos.cookie.device = device;
1771                         cdm->pos.generations[CAM_DEV_GENERATION] =
1772                                 device->target->generation;
1773                         cdm->status = CAM_DEV_MATCH_MORE;
1774                         return(0);
1775                 }
1776                 j = cdm->num_matches;
1777                 cdm->num_matches++;
1778                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1779                 cdm->matches[j].result.device_result.path_id =
1780                         device->target->bus->path_id;
1781                 cdm->matches[j].result.device_result.target_id =
1782                         device->target->target_id;
1783                 cdm->matches[j].result.device_result.target_lun =
1784                         device->lun_id;
1785                 cdm->matches[j].result.device_result.protocol =
1786                         device->protocol;
1787                 bcopy(&device->inq_data,
1788                       &cdm->matches[j].result.device_result.inq_data,
1789                       sizeof(struct scsi_inquiry_data));
1790                 bcopy(&device->ident_data,
1791                       &cdm->matches[j].result.device_result.ident_data,
1792                       sizeof(struct ata_params));
1793
1794                 /* Let the user know whether this device is unconfigured */
1795                 if (device->flags & CAM_DEV_UNCONFIGURED)
1796                         cdm->matches[j].result.device_result.flags =
1797                                 DEV_RESULT_UNCONFIGURED;
1798                 else
1799                         cdm->matches[j].result.device_result.flags =
1800                                 DEV_RESULT_NOFLAG;
1801         }
1802
1803         /*
1804          * If the user isn't interested in peripherals, don't descend
1805          * the tree any further.
1806          */
1807         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1808                 return(1);
1809
1810         /*
1811          * If there is a peripheral list generation recorded, make sure
1812          * it hasn't changed.
1813          */
1814         xpt_lock_buses();
1815         mtx_lock(&bus->eb_mtx);
1816         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1817          && (cdm->pos.cookie.bus == bus)
1818          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1819          && (cdm->pos.cookie.target == device->target)
1820          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1821          && (cdm->pos.cookie.device == device)
1822          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1823          && (cdm->pos.cookie.periph != NULL)) {
1824                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1825                     device->generation) {
1826                         mtx_unlock(&bus->eb_mtx);
1827                         xpt_unlock_buses();
1828                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1829                         return(0);
1830                 }
1831                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1832                 periph->refcount++;
1833         } else
1834                 periph = NULL;
1835         mtx_unlock(&bus->eb_mtx);
1836         xpt_unlock_buses();
1837
1838         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1839 }
1840
1841 static int
1842 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1843 {
1844         struct ccb_dev_match *cdm;
1845         dev_match_ret retval;
1846
1847         cdm = (struct ccb_dev_match *)arg;
1848
1849         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1850
1851         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1852                 cdm->status = CAM_DEV_MATCH_ERROR;
1853                 return(0);
1854         }
1855
1856         /*
1857          * If the copy flag is set, copy this peripheral out.
1858          */
1859         if (retval & DM_RET_COPY) {
1860                 int spaceleft, j;
1861
1862                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1863                         sizeof(struct dev_match_result));
1864
1865                 /*
1866                  * If we don't have enough space to put in another
1867                  * match result, save our position and tell the
1868                  * user there are more devices to check.
1869                  */
1870                 if (spaceleft < sizeof(struct dev_match_result)) {
1871                         bzero(&cdm->pos, sizeof(cdm->pos));
1872                         cdm->pos.position_type =
1873                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1874                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1875                                 CAM_DEV_POS_PERIPH;
1876
1877                         cdm->pos.cookie.bus = periph->path->bus;
1878                         cdm->pos.generations[CAM_BUS_GENERATION]=
1879                                 xsoftc.bus_generation;
1880                         cdm->pos.cookie.target = periph->path->target;
1881                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1882                                 periph->path->bus->generation;
1883                         cdm->pos.cookie.device = periph->path->device;
1884                         cdm->pos.generations[CAM_DEV_GENERATION] =
1885                                 periph->path->target->generation;
1886                         cdm->pos.cookie.periph = periph;
1887                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1888                                 periph->path->device->generation;
1889                         cdm->status = CAM_DEV_MATCH_MORE;
1890                         return(0);
1891                 }
1892
1893                 j = cdm->num_matches;
1894                 cdm->num_matches++;
1895                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1896                 cdm->matches[j].result.periph_result.path_id =
1897                         periph->path->bus->path_id;
1898                 cdm->matches[j].result.periph_result.target_id =
1899                         periph->path->target->target_id;
1900                 cdm->matches[j].result.periph_result.target_lun =
1901                         periph->path->device->lun_id;
1902                 cdm->matches[j].result.periph_result.unit_number =
1903                         periph->unit_number;
1904                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1905                         periph->periph_name, DEV_IDLEN);
1906         }
1907
1908         return(1);
1909 }
1910
1911 static int
1912 xptedtmatch(struct ccb_dev_match *cdm)
1913 {
1914         struct cam_eb *bus;
1915         int ret;
1916
1917         cdm->num_matches = 0;
1918
1919         /*
1920          * Check the bus list generation.  If it has changed, the user
1921          * needs to reset everything and start over.
1922          */
1923         xpt_lock_buses();
1924         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1925          && (cdm->pos.cookie.bus != NULL)) {
1926                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1927                     xsoftc.bus_generation) {
1928                         xpt_unlock_buses();
1929                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1930                         return(0);
1931                 }
1932                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1933                 bus->refcount++;
1934         } else
1935                 bus = NULL;
1936         xpt_unlock_buses();
1937
1938         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1939
1940         /*
1941          * If we get back 0, that means that we had to stop before fully
1942          * traversing the EDT.  It also means that one of the subroutines
1943          * has set the status field to the proper value.  If we get back 1,
1944          * we've fully traversed the EDT and copied out any matching entries.
1945          */
1946         if (ret == 1)
1947                 cdm->status = CAM_DEV_MATCH_LAST;
1948
1949         return(ret);
1950 }
1951
1952 static int
1953 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1954 {
1955         struct cam_periph *periph;
1956         struct ccb_dev_match *cdm;
1957
1958         cdm = (struct ccb_dev_match *)arg;
1959
1960         xpt_lock_buses();
1961         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1962          && (cdm->pos.cookie.pdrv == pdrv)
1963          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1964          && (cdm->pos.cookie.periph != NULL)) {
1965                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1966                     (*pdrv)->generation) {
1967                         xpt_unlock_buses();
1968                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1969                         return(0);
1970                 }
1971                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1972                 periph->refcount++;
1973         } else
1974                 periph = NULL;
1975         xpt_unlock_buses();
1976
1977         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1978 }
1979
1980 static int
1981 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1982 {
1983         struct ccb_dev_match *cdm;
1984         dev_match_ret retval;
1985
1986         cdm = (struct ccb_dev_match *)arg;
1987
1988         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1989
1990         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1991                 cdm->status = CAM_DEV_MATCH_ERROR;
1992                 return(0);
1993         }
1994
1995         /*
1996          * If the copy flag is set, copy this peripheral out.
1997          */
1998         if (retval & DM_RET_COPY) {
1999                 int spaceleft, j;
2000
2001                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2002                         sizeof(struct dev_match_result));
2003
2004                 /*
2005                  * If we don't have enough space to put in another
2006                  * match result, save our position and tell the
2007                  * user there are more devices to check.
2008                  */
2009                 if (spaceleft < sizeof(struct dev_match_result)) {
2010                         struct periph_driver **pdrv;
2011
2012                         pdrv = NULL;
2013                         bzero(&cdm->pos, sizeof(cdm->pos));
2014                         cdm->pos.position_type =
2015                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2016                                 CAM_DEV_POS_PERIPH;
2017
2018                         /*
2019                          * This may look a bit non-sensical, but it is
2020                          * actually quite logical.  There are very few
2021                          * peripheral drivers, and bloating every peripheral
2022                          * structure with a pointer back to its parent
2023                          * peripheral driver linker set entry would cost
2024                          * more in the long run than doing this quick lookup.
2025                          */
2026                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2027                                 if (strcmp((*pdrv)->driver_name,
2028                                     periph->periph_name) == 0)
2029                                         break;
2030                         }
2031
2032                         if (*pdrv == NULL) {
2033                                 cdm->status = CAM_DEV_MATCH_ERROR;
2034                                 return(0);
2035                         }
2036
2037                         cdm->pos.cookie.pdrv = pdrv;
2038                         /*
2039                          * The periph generation slot does double duty, as
2040                          * does the periph pointer slot.  They are used for
2041                          * both edt and pdrv lookups and positioning.
2042                          */
2043                         cdm->pos.cookie.periph = periph;
2044                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2045                                 (*pdrv)->generation;
2046                         cdm->status = CAM_DEV_MATCH_MORE;
2047                         return(0);
2048                 }
2049
2050                 j = cdm->num_matches;
2051                 cdm->num_matches++;
2052                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2053                 cdm->matches[j].result.periph_result.path_id =
2054                         periph->path->bus->path_id;
2055
2056                 /*
2057                  * The transport layer peripheral doesn't have a target or
2058                  * lun.
2059                  */
2060                 if (periph->path->target)
2061                         cdm->matches[j].result.periph_result.target_id =
2062                                 periph->path->target->target_id;
2063                 else
2064                         cdm->matches[j].result.periph_result.target_id =
2065                                 CAM_TARGET_WILDCARD;
2066
2067                 if (periph->path->device)
2068                         cdm->matches[j].result.periph_result.target_lun =
2069                                 periph->path->device->lun_id;
2070                 else
2071                         cdm->matches[j].result.periph_result.target_lun =
2072                                 CAM_LUN_WILDCARD;
2073
2074                 cdm->matches[j].result.periph_result.unit_number =
2075                         periph->unit_number;
2076                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2077                         periph->periph_name, DEV_IDLEN);
2078         }
2079
2080         return(1);
2081 }
2082
2083 static int
2084 xptperiphlistmatch(struct ccb_dev_match *cdm)
2085 {
2086         int ret;
2087
2088         cdm->num_matches = 0;
2089
2090         /*
2091          * At this point in the edt traversal function, we check the bus
2092          * list generation to make sure that no buses have been added or
2093          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2094          * For the peripheral driver list traversal function, however, we
2095          * don't have to worry about new peripheral driver types coming or
2096          * going; they're in a linker set, and therefore can't change
2097          * without a recompile.
2098          */
2099
2100         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2101          && (cdm->pos.cookie.pdrv != NULL))
2102                 ret = xptpdrvtraverse(
2103                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2104                                 xptplistpdrvfunc, cdm);
2105         else
2106                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2107
2108         /*
2109          * If we get back 0, that means that we had to stop before fully
2110          * traversing the peripheral driver tree.  It also means that one of
2111          * the subroutines has set the status field to the proper value.  If
2112          * we get back 1, we've fully traversed the EDT and copied out any
2113          * matching entries.
2114          */
2115         if (ret == 1)
2116                 cdm->status = CAM_DEV_MATCH_LAST;
2117
2118         return(ret);
2119 }
2120
2121 static int
2122 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2123 {
2124         struct cam_eb *bus, *next_bus;
2125         int retval;
2126
2127         retval = 1;
2128         if (start_bus)
2129                 bus = start_bus;
2130         else {
2131                 xpt_lock_buses();
2132                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2133                 if (bus == NULL) {
2134                         xpt_unlock_buses();
2135                         return (retval);
2136                 }
2137                 bus->refcount++;
2138                 xpt_unlock_buses();
2139         }
2140         for (; bus != NULL; bus = next_bus) {
2141                 retval = tr_func(bus, arg);
2142                 if (retval == 0) {
2143                         xpt_release_bus(bus);
2144                         break;
2145                 }
2146                 xpt_lock_buses();
2147                 next_bus = TAILQ_NEXT(bus, links);
2148                 if (next_bus)
2149                         next_bus->refcount++;
2150                 xpt_unlock_buses();
2151                 xpt_release_bus(bus);
2152         }
2153         return(retval);
2154 }
2155
2156 static int
2157 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2158                   xpt_targetfunc_t *tr_func, void *arg)
2159 {
2160         struct cam_et *target, *next_target;
2161         int retval;
2162
2163         retval = 1;
2164         if (start_target)
2165                 target = start_target;
2166         else {
2167                 mtx_lock(&bus->eb_mtx);
2168                 target = TAILQ_FIRST(&bus->et_entries);
2169                 if (target == NULL) {
2170                         mtx_unlock(&bus->eb_mtx);
2171                         return (retval);
2172                 }
2173                 target->refcount++;
2174                 mtx_unlock(&bus->eb_mtx);
2175         }
2176         for (; target != NULL; target = next_target) {
2177                 retval = tr_func(target, arg);
2178                 if (retval == 0) {
2179                         xpt_release_target(target);
2180                         break;
2181                 }
2182                 mtx_lock(&bus->eb_mtx);
2183                 next_target = TAILQ_NEXT(target, links);
2184                 if (next_target)
2185                         next_target->refcount++;
2186                 mtx_unlock(&bus->eb_mtx);
2187                 xpt_release_target(target);
2188         }
2189         return(retval);
2190 }
2191
2192 static int
2193 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2194                   xpt_devicefunc_t *tr_func, void *arg)
2195 {
2196         struct cam_eb *bus;
2197         struct cam_ed *device, *next_device;
2198         int retval;
2199
2200         retval = 1;
2201         bus = target->bus;
2202         if (start_device)
2203                 device = start_device;
2204         else {
2205                 mtx_lock(&bus->eb_mtx);
2206                 device = TAILQ_FIRST(&target->ed_entries);
2207                 if (device == NULL) {
2208                         mtx_unlock(&bus->eb_mtx);
2209                         return (retval);
2210                 }
2211                 device->refcount++;
2212                 mtx_unlock(&bus->eb_mtx);
2213         }
2214         for (; device != NULL; device = next_device) {
2215                 mtx_lock(&device->device_mtx);
2216                 retval = tr_func(device, arg);
2217                 mtx_unlock(&device->device_mtx);
2218                 if (retval == 0) {
2219                         xpt_release_device(device);
2220                         break;
2221                 }
2222                 mtx_lock(&bus->eb_mtx);
2223                 next_device = TAILQ_NEXT(device, links);
2224                 if (next_device)
2225                         next_device->refcount++;
2226                 mtx_unlock(&bus->eb_mtx);
2227                 xpt_release_device(device);
2228         }
2229         return(retval);
2230 }
2231
2232 static int
2233 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2234                   xpt_periphfunc_t *tr_func, void *arg)
2235 {
2236         struct cam_eb *bus;
2237         struct cam_periph *periph, *next_periph;
2238         int retval;
2239
2240         retval = 1;
2241
2242         bus = device->target->bus;
2243         if (start_periph)
2244                 periph = start_periph;
2245         else {
2246                 xpt_lock_buses();
2247                 mtx_lock(&bus->eb_mtx);
2248                 periph = SLIST_FIRST(&device->periphs);
2249                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2250                         periph = SLIST_NEXT(periph, periph_links);
2251                 if (periph == NULL) {
2252                         mtx_unlock(&bus->eb_mtx);
2253                         xpt_unlock_buses();
2254                         return (retval);
2255                 }
2256                 periph->refcount++;
2257                 mtx_unlock(&bus->eb_mtx);
2258                 xpt_unlock_buses();
2259         }
2260         for (; periph != NULL; periph = next_periph) {
2261                 retval = tr_func(periph, arg);
2262                 if (retval == 0) {
2263                         cam_periph_release_locked(periph);
2264                         break;
2265                 }
2266                 xpt_lock_buses();
2267                 mtx_lock(&bus->eb_mtx);
2268                 next_periph = SLIST_NEXT(periph, periph_links);
2269                 while (next_periph != NULL &&
2270                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2271                         next_periph = SLIST_NEXT(next_periph, periph_links);
2272                 if (next_periph)
2273                         next_periph->refcount++;
2274                 mtx_unlock(&bus->eb_mtx);
2275                 xpt_unlock_buses();
2276                 cam_periph_release_locked(periph);
2277         }
2278         return(retval);
2279 }
2280
2281 static int
2282 xptpdrvtraverse(struct periph_driver **start_pdrv,
2283                 xpt_pdrvfunc_t *tr_func, void *arg)
2284 {
2285         struct periph_driver **pdrv;
2286         int retval;
2287
2288         retval = 1;
2289
2290         /*
2291          * We don't traverse the peripheral driver list like we do the
2292          * other lists, because it is a linker set, and therefore cannot be
2293          * changed during runtime.  If the peripheral driver list is ever
2294          * re-done to be something other than a linker set (i.e. it can
2295          * change while the system is running), the list traversal should
2296          * be modified to work like the other traversal functions.
2297          */
2298         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2299              *pdrv != NULL; pdrv++) {
2300                 retval = tr_func(pdrv, arg);
2301
2302                 if (retval == 0)
2303                         return(retval);
2304         }
2305
2306         return(retval);
2307 }
2308
2309 static int
2310 xptpdperiphtraverse(struct periph_driver **pdrv,
2311                     struct cam_periph *start_periph,
2312                     xpt_periphfunc_t *tr_func, void *arg)
2313 {
2314         struct cam_periph *periph, *next_periph;
2315         int retval;
2316
2317         retval = 1;
2318
2319         if (start_periph)
2320                 periph = start_periph;
2321         else {
2322                 xpt_lock_buses();
2323                 periph = TAILQ_FIRST(&(*pdrv)->units);
2324                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2325                         periph = TAILQ_NEXT(periph, unit_links);
2326                 if (periph == NULL) {
2327                         xpt_unlock_buses();
2328                         return (retval);
2329                 }
2330                 periph->refcount++;
2331                 xpt_unlock_buses();
2332         }
2333         for (; periph != NULL; periph = next_periph) {
2334                 cam_periph_lock(periph);
2335                 retval = tr_func(periph, arg);
2336                 cam_periph_unlock(periph);
2337                 if (retval == 0) {
2338                         cam_periph_release(periph);
2339                         break;
2340                 }
2341                 xpt_lock_buses();
2342                 next_periph = TAILQ_NEXT(periph, unit_links);
2343                 while (next_periph != NULL &&
2344                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2345                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2346                 if (next_periph)
2347                         next_periph->refcount++;
2348                 xpt_unlock_buses();
2349                 cam_periph_release(periph);
2350         }
2351         return(retval);
2352 }
2353
2354 static int
2355 xptdefbusfunc(struct cam_eb *bus, void *arg)
2356 {
2357         struct xpt_traverse_config *tr_config;
2358
2359         tr_config = (struct xpt_traverse_config *)arg;
2360
2361         if (tr_config->depth == XPT_DEPTH_BUS) {
2362                 xpt_busfunc_t *tr_func;
2363
2364                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2365
2366                 return(tr_func(bus, tr_config->tr_arg));
2367         } else
2368                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2369 }
2370
2371 static int
2372 xptdeftargetfunc(struct cam_et *target, void *arg)
2373 {
2374         struct xpt_traverse_config *tr_config;
2375
2376         tr_config = (struct xpt_traverse_config *)arg;
2377
2378         if (tr_config->depth == XPT_DEPTH_TARGET) {
2379                 xpt_targetfunc_t *tr_func;
2380
2381                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2382
2383                 return(tr_func(target, tr_config->tr_arg));
2384         } else
2385                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2386 }
2387
2388 static int
2389 xptdefdevicefunc(struct cam_ed *device, void *arg)
2390 {
2391         struct xpt_traverse_config *tr_config;
2392
2393         tr_config = (struct xpt_traverse_config *)arg;
2394
2395         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2396                 xpt_devicefunc_t *tr_func;
2397
2398                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2399
2400                 return(tr_func(device, tr_config->tr_arg));
2401         } else
2402                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2403 }
2404
2405 static int
2406 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2407 {
2408         struct xpt_traverse_config *tr_config;
2409         xpt_periphfunc_t *tr_func;
2410
2411         tr_config = (struct xpt_traverse_config *)arg;
2412
2413         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2414
2415         /*
2416          * Unlike the other default functions, we don't check for depth
2417          * here.  The peripheral driver level is the last level in the EDT,
2418          * so if we're here, we should execute the function in question.
2419          */
2420         return(tr_func(periph, tr_config->tr_arg));
2421 }
2422
2423 /*
2424  * Execute the given function for every bus in the EDT.
2425  */
2426 static int
2427 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2428 {
2429         struct xpt_traverse_config tr_config;
2430
2431         tr_config.depth = XPT_DEPTH_BUS;
2432         tr_config.tr_func = tr_func;
2433         tr_config.tr_arg = arg;
2434
2435         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2436 }
2437
2438 /*
2439  * Execute the given function for every device in the EDT.
2440  */
2441 static int
2442 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2443 {
2444         struct xpt_traverse_config tr_config;
2445
2446         tr_config.depth = XPT_DEPTH_DEVICE;
2447         tr_config.tr_func = tr_func;
2448         tr_config.tr_arg = arg;
2449
2450         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2451 }
2452
2453 static int
2454 xptsetasyncfunc(struct cam_ed *device, void *arg)
2455 {
2456         struct cam_path path;
2457         struct ccb_getdev cgd;
2458         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2459
2460         /*
2461          * Don't report unconfigured devices (Wildcard devs,
2462          * devices only for target mode, device instances
2463          * that have been invalidated but are waiting for
2464          * their last reference count to be released).
2465          */
2466         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2467                 return (1);
2468
2469         xpt_compile_path(&path,
2470                          NULL,
2471                          device->target->bus->path_id,
2472                          device->target->target_id,
2473                          device->lun_id);
2474         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2475         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2476         xpt_action((union ccb *)&cgd);
2477         csa->callback(csa->callback_arg,
2478                             AC_FOUND_DEVICE,
2479                             &path, &cgd);
2480         xpt_release_path(&path);
2481
2482         return(1);
2483 }
2484
2485 static int
2486 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2487 {
2488         struct cam_path path;
2489         struct ccb_pathinq cpi;
2490         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2491
2492         xpt_compile_path(&path, /*periph*/NULL,
2493                          bus->path_id,
2494                          CAM_TARGET_WILDCARD,
2495                          CAM_LUN_WILDCARD);
2496         xpt_path_lock(&path);
2497         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2498         cpi.ccb_h.func_code = XPT_PATH_INQ;
2499         xpt_action((union ccb *)&cpi);
2500         csa->callback(csa->callback_arg,
2501                             AC_PATH_REGISTERED,
2502                             &path, &cpi);
2503         xpt_path_unlock(&path);
2504         xpt_release_path(&path);
2505
2506         return(1);
2507 }
2508
2509 void
2510 xpt_action(union ccb *start_ccb)
2511 {
2512
2513         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2514             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2515                 xpt_action_name(start_ccb->ccb_h.func_code)));
2516
2517         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2518         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2519 }
2520
2521 void
2522 xpt_action_default(union ccb *start_ccb)
2523 {
2524         struct cam_path *path;
2525         struct cam_sim *sim;
2526         int lock;
2527
2528         path = start_ccb->ccb_h.path;
2529         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2530             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2531                 xpt_action_name(start_ccb->ccb_h.func_code)));
2532
2533         switch (start_ccb->ccb_h.func_code) {
2534         case XPT_SCSI_IO:
2535         {
2536                 struct cam_ed *device;
2537
2538                 /*
2539                  * For the sake of compatibility with SCSI-1
2540                  * devices that may not understand the identify
2541                  * message, we include lun information in the
2542                  * second byte of all commands.  SCSI-1 specifies
2543                  * that luns are a 3 bit value and reserves only 3
2544                  * bits for lun information in the CDB.  Later
2545                  * revisions of the SCSI spec allow for more than 8
2546                  * luns, but have deprecated lun information in the
2547                  * CDB.  So, if the lun won't fit, we must omit.
2548                  *
2549                  * Also be aware that during initial probing for devices,
2550                  * the inquiry information is unknown but initialized to 0.
2551                  * This means that this code will be exercised while probing
2552                  * devices with an ANSI revision greater than 2.
2553                  */
2554                 device = path->device;
2555                 if (device->protocol_version <= SCSI_REV_2
2556                  && start_ccb->ccb_h.target_lun < 8
2557                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2558
2559                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2560                             start_ccb->ccb_h.target_lun << 5;
2561                 }
2562                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2563         }
2564         /* FALLTHROUGH */
2565         case XPT_TARGET_IO:
2566         case XPT_CONT_TARGET_IO:
2567                 start_ccb->csio.sense_resid = 0;
2568                 start_ccb->csio.resid = 0;
2569                 /* FALLTHROUGH */
2570         case XPT_ATA_IO:
2571                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2572                         start_ccb->ataio.resid = 0;
2573                 /* FALLTHROUGH */
2574         case XPT_NVME_IO:
2575                 if (start_ccb->ccb_h.func_code == XPT_NVME_IO)
2576                         start_ccb->nvmeio.resid = 0;
2577                 /* FALLTHROUGH */
2578         case XPT_RESET_DEV:
2579         case XPT_ENG_EXEC:
2580         case XPT_SMP_IO:
2581         {
2582                 struct cam_devq *devq;
2583
2584                 devq = path->bus->sim->devq;
2585                 mtx_lock(&devq->send_mtx);
2586                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2587                 if (xpt_schedule_devq(devq, path->device) != 0)
2588                         xpt_run_devq(devq);
2589                 mtx_unlock(&devq->send_mtx);
2590                 break;
2591         }
2592         case XPT_CALC_GEOMETRY:
2593                 /* Filter out garbage */
2594                 if (start_ccb->ccg.block_size == 0
2595                  || start_ccb->ccg.volume_size == 0) {
2596                         start_ccb->ccg.cylinders = 0;
2597                         start_ccb->ccg.heads = 0;
2598                         start_ccb->ccg.secs_per_track = 0;
2599                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2600                         break;
2601                 }
2602 #if defined(__sparc64__)
2603                 /*
2604                  * For sparc64, we may need adjust the geometry of large
2605                  * disks in order to fit the limitations of the 16-bit
2606                  * fields of the VTOC8 disk label.
2607                  */
2608                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2609                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2610                         break;
2611                 }
2612 #endif
2613                 goto call_sim;
2614         case XPT_ABORT:
2615         {
2616                 union ccb* abort_ccb;
2617
2618                 abort_ccb = start_ccb->cab.abort_ccb;
2619                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2620                         struct cam_ed *device;
2621                         struct cam_devq *devq;
2622
2623                         device = abort_ccb->ccb_h.path->device;
2624                         devq = device->sim->devq;
2625
2626                         mtx_lock(&devq->send_mtx);
2627                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2628                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2629                                 abort_ccb->ccb_h.status =
2630                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2631                                 xpt_freeze_devq_device(device, 1);
2632                                 mtx_unlock(&devq->send_mtx);
2633                                 xpt_done(abort_ccb);
2634                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2635                                 break;
2636                         }
2637                         mtx_unlock(&devq->send_mtx);
2638
2639                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2640                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2641                                 /*
2642                                  * We've caught this ccb en route to
2643                                  * the SIM.  Flag it for abort and the
2644                                  * SIM will do so just before starting
2645                                  * real work on the CCB.
2646                                  */
2647                                 abort_ccb->ccb_h.status =
2648                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2649                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2650                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2651                                 break;
2652                         }
2653                 }
2654                 if (XPT_FC_IS_QUEUED(abort_ccb)
2655                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2656                         /*
2657                          * It's already completed but waiting
2658                          * for our SWI to get to it.
2659                          */
2660                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2661                         break;
2662                 }
2663                 /*
2664                  * If we weren't able to take care of the abort request
2665                  * in the XPT, pass the request down to the SIM for processing.
2666                  */
2667         }
2668         /* FALLTHROUGH */
2669         case XPT_ACCEPT_TARGET_IO:
2670         case XPT_EN_LUN:
2671         case XPT_IMMED_NOTIFY:
2672         case XPT_NOTIFY_ACK:
2673         case XPT_RESET_BUS:
2674         case XPT_IMMEDIATE_NOTIFY:
2675         case XPT_NOTIFY_ACKNOWLEDGE:
2676         case XPT_GET_SIM_KNOB_OLD:
2677         case XPT_GET_SIM_KNOB:
2678         case XPT_SET_SIM_KNOB:
2679         case XPT_GET_TRAN_SETTINGS:
2680         case XPT_SET_TRAN_SETTINGS:
2681         case XPT_PATH_INQ:
2682 call_sim:
2683                 sim = path->bus->sim;
2684                 lock = (mtx_owned(sim->mtx) == 0);
2685                 if (lock)
2686                         CAM_SIM_LOCK(sim);
2687                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2688                     ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
2689                 (*(sim->sim_action))(sim, start_ccb);
2690                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2691                     ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
2692                 if (lock)
2693                         CAM_SIM_UNLOCK(sim);
2694                 break;
2695         case XPT_PATH_STATS:
2696                 start_ccb->cpis.last_reset = path->bus->last_reset;
2697                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2698                 break;
2699         case XPT_GDEV_TYPE:
2700         {
2701                 struct cam_ed *dev;
2702
2703                 dev = path->device;
2704                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2705                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2706                 } else {
2707                         struct ccb_getdev *cgd;
2708
2709                         cgd = &start_ccb->cgd;
2710                         cgd->protocol = dev->protocol;
2711                         cgd->inq_data = dev->inq_data;
2712                         cgd->ident_data = dev->ident_data;
2713                         cgd->inq_flags = dev->inq_flags;
2714                         cgd->nvme_data = dev->nvme_data;
2715                         cgd->nvme_cdata = dev->nvme_cdata;
2716                         cgd->ccb_h.status = CAM_REQ_CMP;
2717                         cgd->serial_num_len = dev->serial_num_len;
2718                         if ((dev->serial_num_len > 0)
2719                          && (dev->serial_num != NULL))
2720                                 bcopy(dev->serial_num, cgd->serial_num,
2721                                       dev->serial_num_len);
2722                 }
2723                 break;
2724         }
2725         case XPT_GDEV_STATS:
2726         {
2727                 struct cam_ed *dev;
2728
2729                 dev = path->device;
2730                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2731                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2732                 } else {
2733                         struct ccb_getdevstats *cgds;
2734                         struct cam_eb *bus;
2735                         struct cam_et *tar;
2736                         struct cam_devq *devq;
2737
2738                         cgds = &start_ccb->cgds;
2739                         bus = path->bus;
2740                         tar = path->target;
2741                         devq = bus->sim->devq;
2742                         mtx_lock(&devq->send_mtx);
2743                         cgds->dev_openings = dev->ccbq.dev_openings;
2744                         cgds->dev_active = dev->ccbq.dev_active;
2745                         cgds->allocated = dev->ccbq.allocated;
2746                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2747                         cgds->held = cgds->allocated - cgds->dev_active -
2748                             cgds->queued;
2749                         cgds->last_reset = tar->last_reset;
2750                         cgds->maxtags = dev->maxtags;
2751                         cgds->mintags = dev->mintags;
2752                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2753                                 cgds->last_reset = bus->last_reset;
2754                         mtx_unlock(&devq->send_mtx);
2755                         cgds->ccb_h.status = CAM_REQ_CMP;
2756                 }
2757                 break;
2758         }
2759         case XPT_GDEVLIST:
2760         {
2761                 struct cam_periph       *nperiph;
2762                 struct periph_list      *periph_head;
2763                 struct ccb_getdevlist   *cgdl;
2764                 u_int                   i;
2765                 struct cam_ed           *device;
2766                 int                     found;
2767
2768
2769                 found = 0;
2770
2771                 /*
2772                  * Don't want anyone mucking with our data.
2773                  */
2774                 device = path->device;
2775                 periph_head = &device->periphs;
2776                 cgdl = &start_ccb->cgdl;
2777
2778                 /*
2779                  * Check and see if the list has changed since the user
2780                  * last requested a list member.  If so, tell them that the
2781                  * list has changed, and therefore they need to start over
2782                  * from the beginning.
2783                  */
2784                 if ((cgdl->index != 0) &&
2785                     (cgdl->generation != device->generation)) {
2786                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2787                         break;
2788                 }
2789
2790                 /*
2791                  * Traverse the list of peripherals and attempt to find
2792                  * the requested peripheral.
2793                  */
2794                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2795                      (nperiph != NULL) && (i <= cgdl->index);
2796                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2797                         if (i == cgdl->index) {
2798                                 strncpy(cgdl->periph_name,
2799                                         nperiph->periph_name,
2800                                         DEV_IDLEN);
2801                                 cgdl->unit_number = nperiph->unit_number;
2802                                 found = 1;
2803                         }
2804                 }
2805                 if (found == 0) {
2806                         cgdl->status = CAM_GDEVLIST_ERROR;
2807                         break;
2808                 }
2809
2810                 if (nperiph == NULL)
2811                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2812                 else
2813                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2814
2815                 cgdl->index++;
2816                 cgdl->generation = device->generation;
2817
2818                 cgdl->ccb_h.status = CAM_REQ_CMP;
2819                 break;
2820         }
2821         case XPT_DEV_MATCH:
2822         {
2823                 dev_pos_type position_type;
2824                 struct ccb_dev_match *cdm;
2825
2826                 cdm = &start_ccb->cdm;
2827
2828                 /*
2829                  * There are two ways of getting at information in the EDT.
2830                  * The first way is via the primary EDT tree.  It starts
2831                  * with a list of buses, then a list of targets on a bus,
2832                  * then devices/luns on a target, and then peripherals on a
2833                  * device/lun.  The "other" way is by the peripheral driver
2834                  * lists.  The peripheral driver lists are organized by
2835                  * peripheral driver.  (obviously)  So it makes sense to
2836                  * use the peripheral driver list if the user is looking
2837                  * for something like "da1", or all "da" devices.  If the
2838                  * user is looking for something on a particular bus/target
2839                  * or lun, it's generally better to go through the EDT tree.
2840                  */
2841
2842                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2843                         position_type = cdm->pos.position_type;
2844                 else {
2845                         u_int i;
2846
2847                         position_type = CAM_DEV_POS_NONE;
2848
2849                         for (i = 0; i < cdm->num_patterns; i++) {
2850                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2851                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2852                                         position_type = CAM_DEV_POS_EDT;
2853                                         break;
2854                                 }
2855                         }
2856
2857                         if (cdm->num_patterns == 0)
2858                                 position_type = CAM_DEV_POS_EDT;
2859                         else if (position_type == CAM_DEV_POS_NONE)
2860                                 position_type = CAM_DEV_POS_PDRV;
2861                 }
2862
2863                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2864                 case CAM_DEV_POS_EDT:
2865                         xptedtmatch(cdm);
2866                         break;
2867                 case CAM_DEV_POS_PDRV:
2868                         xptperiphlistmatch(cdm);
2869                         break;
2870                 default:
2871                         cdm->status = CAM_DEV_MATCH_ERROR;
2872                         break;
2873                 }
2874
2875                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2876                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2877                 else
2878                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2879
2880                 break;
2881         }
2882         case XPT_SASYNC_CB:
2883         {
2884                 struct ccb_setasync *csa;
2885                 struct async_node *cur_entry;
2886                 struct async_list *async_head;
2887                 u_int32_t added;
2888
2889                 csa = &start_ccb->csa;
2890                 added = csa->event_enable;
2891                 async_head = &path->device->asyncs;
2892
2893                 /*
2894                  * If there is already an entry for us, simply
2895                  * update it.
2896                  */
2897                 cur_entry = SLIST_FIRST(async_head);
2898                 while (cur_entry != NULL) {
2899                         if ((cur_entry->callback_arg == csa->callback_arg)
2900                          && (cur_entry->callback == csa->callback))
2901                                 break;
2902                         cur_entry = SLIST_NEXT(cur_entry, links);
2903                 }
2904
2905                 if (cur_entry != NULL) {
2906                         /*
2907                          * If the request has no flags set,
2908                          * remove the entry.
2909                          */
2910                         added &= ~cur_entry->event_enable;
2911                         if (csa->event_enable == 0) {
2912                                 SLIST_REMOVE(async_head, cur_entry,
2913                                              async_node, links);
2914                                 xpt_release_device(path->device);
2915                                 free(cur_entry, M_CAMXPT);
2916                         } else {
2917                                 cur_entry->event_enable = csa->event_enable;
2918                         }
2919                         csa->event_enable = added;
2920                 } else {
2921                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2922                                            M_NOWAIT);
2923                         if (cur_entry == NULL) {
2924                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2925                                 break;
2926                         }
2927                         cur_entry->event_enable = csa->event_enable;
2928                         cur_entry->event_lock =
2929                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2930                         cur_entry->callback_arg = csa->callback_arg;
2931                         cur_entry->callback = csa->callback;
2932                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2933                         xpt_acquire_device(path->device);
2934                 }
2935                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2936                 break;
2937         }
2938         case XPT_REL_SIMQ:
2939         {
2940                 struct ccb_relsim *crs;
2941                 struct cam_ed *dev;
2942
2943                 crs = &start_ccb->crs;
2944                 dev = path->device;
2945                 if (dev == NULL) {
2946
2947                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2948                         break;
2949                 }
2950
2951                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2952
2953                         /* Don't ever go below one opening */
2954                         if (crs->openings > 0) {
2955                                 xpt_dev_ccbq_resize(path, crs->openings);
2956                                 if (bootverbose) {
2957                                         xpt_print(path,
2958                                             "number of openings is now %d\n",
2959                                             crs->openings);
2960                                 }
2961                         }
2962                 }
2963
2964                 mtx_lock(&dev->sim->devq->send_mtx);
2965                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2966
2967                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2968
2969                                 /*
2970                                  * Just extend the old timeout and decrement
2971                                  * the freeze count so that a single timeout
2972                                  * is sufficient for releasing the queue.
2973                                  */
2974                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2975                                 callout_stop(&dev->callout);
2976                         } else {
2977
2978                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2979                         }
2980
2981                         callout_reset_sbt(&dev->callout,
2982                             SBT_1MS * crs->release_timeout, 0,
2983                             xpt_release_devq_timeout, dev, 0);
2984
2985                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2986
2987                 }
2988
2989                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2990
2991                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2992                                 /*
2993                                  * Decrement the freeze count so that a single
2994                                  * completion is still sufficient to unfreeze
2995                                  * the queue.
2996                                  */
2997                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2998                         } else {
2999
3000                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3001                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3002                         }
3003                 }
3004
3005                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3006
3007                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3008                          || (dev->ccbq.dev_active == 0)) {
3009
3010                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3011                         } else {
3012
3013                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3014                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3015                         }
3016                 }
3017                 mtx_unlock(&dev->sim->devq->send_mtx);
3018
3019                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3020                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3021                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3022                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3023                 break;
3024         }
3025         case XPT_DEBUG: {
3026                 struct cam_path *oldpath;
3027
3028                 /* Check that all request bits are supported. */
3029                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3030                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3031                         break;
3032                 }
3033
3034                 cam_dflags = CAM_DEBUG_NONE;
3035                 if (cam_dpath != NULL) {
3036                         oldpath = cam_dpath;
3037                         cam_dpath = NULL;
3038                         xpt_free_path(oldpath);
3039                 }
3040                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3041                         if (xpt_create_path(&cam_dpath, NULL,
3042                                             start_ccb->ccb_h.path_id,
3043                                             start_ccb->ccb_h.target_id,
3044                                             start_ccb->ccb_h.target_lun) !=
3045                                             CAM_REQ_CMP) {
3046                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3047                         } else {
3048                                 cam_dflags = start_ccb->cdbg.flags;
3049                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3050                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3051                                     cam_dflags);
3052                         }
3053                 } else
3054                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3055                 break;
3056         }
3057         case XPT_NOOP:
3058                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3059                         xpt_freeze_devq(path, 1);
3060                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3061                 break;
3062         case XPT_REPROBE_LUN:
3063                 xpt_async(AC_INQ_CHANGED, path, NULL);
3064                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3065                 xpt_done(start_ccb);
3066                 break;
3067         default:
3068         case XPT_SDEV_TYPE:
3069         case XPT_TERM_IO:
3070         case XPT_ENG_INQ:
3071                 /* XXX Implement */
3072                 xpt_print(start_ccb->ccb_h.path,
3073                     "%s: CCB type %#x %s not supported\n", __func__,
3074                     start_ccb->ccb_h.func_code,
3075                     xpt_action_name(start_ccb->ccb_h.func_code));
3076                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3077                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3078                         xpt_done(start_ccb);
3079                 }
3080                 break;
3081         }
3082         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3083             ("xpt_action_default: func= %#x %s status %#x\n",
3084                 start_ccb->ccb_h.func_code,
3085                 xpt_action_name(start_ccb->ccb_h.func_code),
3086                 start_ccb->ccb_h.status));
3087 }
3088
3089 void
3090 xpt_polled_action(union ccb *start_ccb)
3091 {
3092         u_int32_t timeout;
3093         struct    cam_sim *sim;
3094         struct    cam_devq *devq;
3095         struct    cam_ed *dev;
3096
3097         timeout = start_ccb->ccb_h.timeout * 10;
3098         sim = start_ccb->ccb_h.path->bus->sim;
3099         devq = sim->devq;
3100         dev = start_ccb->ccb_h.path->device;
3101
3102         mtx_unlock(&dev->device_mtx);
3103
3104         /*
3105          * Steal an opening so that no other queued requests
3106          * can get it before us while we simulate interrupts.
3107          */
3108         mtx_lock(&devq->send_mtx);
3109         dev->ccbq.dev_openings--;
3110         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3111             (--timeout > 0)) {
3112                 mtx_unlock(&devq->send_mtx);
3113                 DELAY(100);
3114                 CAM_SIM_LOCK(sim);
3115                 (*(sim->sim_poll))(sim);
3116                 CAM_SIM_UNLOCK(sim);
3117                 camisr_runqueue();
3118                 mtx_lock(&devq->send_mtx);
3119         }
3120         dev->ccbq.dev_openings++;
3121         mtx_unlock(&devq->send_mtx);
3122
3123         if (timeout != 0) {
3124                 xpt_action(start_ccb);
3125                 while(--timeout > 0) {
3126                         CAM_SIM_LOCK(sim);
3127                         (*(sim->sim_poll))(sim);
3128                         CAM_SIM_UNLOCK(sim);
3129                         camisr_runqueue();
3130                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3131                             != CAM_REQ_INPROG)
3132                                 break;
3133                         DELAY(100);
3134                 }
3135                 if (timeout == 0) {
3136                         /*
3137                          * XXX Is it worth adding a sim_timeout entry
3138                          * point so we can attempt recovery?  If
3139                          * this is only used for dumps, I don't think
3140                          * it is.
3141                          */
3142                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3143                 }
3144         } else {
3145                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3146         }
3147
3148         mtx_lock(&dev->device_mtx);
3149 }
3150
3151 /*
3152  * Schedule a peripheral driver to receive a ccb when its
3153  * target device has space for more transactions.
3154  */
3155 void
3156 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3157 {
3158
3159         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3160         cam_periph_assert(periph, MA_OWNED);
3161         if (new_priority < periph->scheduled_priority) {
3162                 periph->scheduled_priority = new_priority;
3163                 xpt_run_allocq(periph, 0);
3164         }
3165 }
3166
3167
3168 /*
3169  * Schedule a device to run on a given queue.
3170  * If the device was inserted as a new entry on the queue,
3171  * return 1 meaning the device queue should be run. If we
3172  * were already queued, implying someone else has already
3173  * started the queue, return 0 so the caller doesn't attempt
3174  * to run the queue.
3175  */
3176 static int
3177 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3178                  u_int32_t new_priority)
3179 {
3180         int retval;
3181         u_int32_t old_priority;
3182
3183         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3184
3185         old_priority = pinfo->priority;
3186
3187         /*
3188          * Are we already queued?
3189          */
3190         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3191                 /* Simply reorder based on new priority */
3192                 if (new_priority < old_priority) {
3193                         camq_change_priority(queue, pinfo->index,
3194                                              new_priority);
3195                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3196                                         ("changed priority to %d\n",
3197                                          new_priority));
3198                         retval = 1;
3199                 } else
3200                         retval = 0;
3201         } else {
3202                 /* New entry on the queue */
3203                 if (new_priority < old_priority)
3204                         pinfo->priority = new_priority;
3205
3206                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3207                                 ("Inserting onto queue\n"));
3208                 pinfo->generation = ++queue->generation;
3209                 camq_insert(queue, pinfo);
3210                 retval = 1;
3211         }
3212         return (retval);
3213 }
3214
3215 static void
3216 xpt_run_allocq_task(void *context, int pending)
3217 {
3218         struct cam_periph *periph = context;
3219
3220         cam_periph_lock(periph);
3221         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3222         xpt_run_allocq(periph, 1);
3223         cam_periph_unlock(periph);
3224         cam_periph_release(periph);
3225 }
3226
3227 static void
3228 xpt_run_allocq(struct cam_periph *periph, int sleep)
3229 {
3230         struct cam_ed   *device;
3231         union ccb       *ccb;
3232         uint32_t         prio;
3233
3234         cam_periph_assert(periph, MA_OWNED);
3235         if (periph->periph_allocating)
3236                 return;
3237         periph->periph_allocating = 1;
3238         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3239         device = periph->path->device;
3240         ccb = NULL;
3241 restart:
3242         while ((prio = min(periph->scheduled_priority,
3243             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3244             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3245              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3246
3247                 if (ccb == NULL &&
3248                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3249                         if (sleep) {
3250                                 ccb = xpt_get_ccb(periph);
3251                                 goto restart;
3252                         }
3253                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3254                                 break;
3255                         cam_periph_doacquire(periph);
3256                         periph->flags |= CAM_PERIPH_RUN_TASK;
3257                         taskqueue_enqueue(xsoftc.xpt_taskq,
3258                             &periph->periph_run_task);
3259                         break;
3260                 }
3261                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3262                 if (prio == periph->immediate_priority) {
3263                         periph->immediate_priority = CAM_PRIORITY_NONE;
3264                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3265                                         ("waking cam_periph_getccb()\n"));
3266                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3267                                           periph_links.sle);
3268                         wakeup(&periph->ccb_list);
3269                 } else {
3270                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3271                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3272                                         ("calling periph_start()\n"));
3273                         periph->periph_start(periph, ccb);
3274                 }
3275                 ccb = NULL;
3276         }
3277         if (ccb != NULL)
3278                 xpt_release_ccb(ccb);
3279         periph->periph_allocating = 0;
3280 }
3281
3282 static void
3283 xpt_run_devq(struct cam_devq *devq)
3284 {
3285         int lock;
3286
3287         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3288
3289         devq->send_queue.qfrozen_cnt++;
3290         while ((devq->send_queue.entries > 0)
3291             && (devq->send_openings > 0)
3292             && (devq->send_queue.qfrozen_cnt <= 1)) {
3293                 struct  cam_ed *device;
3294                 union ccb *work_ccb;
3295                 struct  cam_sim *sim;
3296                 struct xpt_proto *proto;
3297
3298                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3299                                                            CAMQ_HEAD);
3300                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3301                                 ("running device %p\n", device));
3302
3303                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3304                 if (work_ccb == NULL) {
3305                         printf("device on run queue with no ccbs???\n");
3306                         continue;
3307                 }
3308
3309                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3310
3311                         mtx_lock(&xsoftc.xpt_highpower_lock);
3312                         if (xsoftc.num_highpower <= 0) {
3313                                 /*
3314                                  * We got a high power command, but we
3315                                  * don't have any available slots.  Freeze
3316                                  * the device queue until we have a slot
3317                                  * available.
3318                                  */
3319                                 xpt_freeze_devq_device(device, 1);
3320                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3321                                                    highpowerq_entry);
3322
3323                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3324                                 continue;
3325                         } else {
3326                                 /*
3327                                  * Consume a high power slot while
3328                                  * this ccb runs.
3329                                  */
3330                                 xsoftc.num_highpower--;
3331                         }
3332                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3333                 }
3334                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3335                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3336                 devq->send_openings--;
3337                 devq->send_active++;
3338                 xpt_schedule_devq(devq, device);
3339                 mtx_unlock(&devq->send_mtx);
3340
3341                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3342                         /*
3343                          * The client wants to freeze the queue
3344                          * after this CCB is sent.
3345                          */
3346                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3347                 }
3348
3349                 /* In Target mode, the peripheral driver knows best... */
3350                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3351                         if ((device->inq_flags & SID_CmdQue) != 0
3352                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3353                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3354                         else
3355                                 /*
3356                                  * Clear this in case of a retried CCB that
3357                                  * failed due to a rejected tag.
3358                                  */
3359                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3360                 }
3361
3362                 KASSERT(device == work_ccb->ccb_h.path->device,
3363                     ("device (%p) / path->device (%p) mismatch",
3364                         device, work_ccb->ccb_h.path->device));
3365                 proto = xpt_proto_find(device->protocol);
3366                 if (proto && proto->ops->debug_out)
3367                         proto->ops->debug_out(work_ccb);
3368
3369                 /*
3370                  * Device queues can be shared among multiple SIM instances
3371                  * that reside on different buses.  Use the SIM from the
3372                  * queued device, rather than the one from the calling bus.
3373                  */
3374                 sim = device->sim;
3375                 lock = (mtx_owned(sim->mtx) == 0);
3376                 if (lock)
3377                         CAM_SIM_LOCK(sim);
3378                 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms
3379                 (*(sim->sim_action))(sim, work_ccb);
3380                 if (lock)
3381                         CAM_SIM_UNLOCK(sim);
3382                 mtx_lock(&devq->send_mtx);
3383         }
3384         devq->send_queue.qfrozen_cnt--;
3385 }
3386
3387 /*
3388  * This function merges stuff from the slave ccb into the master ccb, while
3389  * keeping important fields in the master ccb constant.
3390  */
3391 void
3392 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3393 {
3394
3395         /*
3396          * Pull fields that are valid for peripheral drivers to set
3397          * into the master CCB along with the CCB "payload".
3398          */
3399         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3400         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3401         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3402         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3403         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3404               sizeof(union ccb) - sizeof(struct ccb_hdr));
3405 }
3406
3407 void
3408 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3409                     u_int32_t priority, u_int32_t flags)
3410 {
3411
3412         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3413         ccb_h->pinfo.priority = priority;
3414         ccb_h->path = path;
3415         ccb_h->path_id = path->bus->path_id;
3416         if (path->target)
3417                 ccb_h->target_id = path->target->target_id;
3418         else
3419                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3420         if (path->device) {
3421                 ccb_h->target_lun = path->device->lun_id;
3422                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3423         } else {
3424                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3425         }
3426         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3427         ccb_h->flags = flags;
3428         ccb_h->xflags = 0;
3429 }
3430
3431 void
3432 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3433 {
3434         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3435 }
3436
3437 /* Path manipulation functions */
3438 cam_status
3439 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3440                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3441 {
3442         struct     cam_path *path;
3443         cam_status status;
3444
3445         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3446
3447         if (path == NULL) {
3448                 status = CAM_RESRC_UNAVAIL;
3449                 return(status);
3450         }
3451         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3452         if (status != CAM_REQ_CMP) {
3453                 free(path, M_CAMPATH);
3454                 path = NULL;
3455         }
3456         *new_path_ptr = path;
3457         return (status);
3458 }
3459
3460 cam_status
3461 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3462                          struct cam_periph *periph, path_id_t path_id,
3463                          target_id_t target_id, lun_id_t lun_id)
3464 {
3465
3466         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3467             lun_id));
3468 }
3469
3470 cam_status
3471 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3472                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3473 {
3474         struct       cam_eb *bus;
3475         struct       cam_et *target;
3476         struct       cam_ed *device;
3477         cam_status   status;
3478
3479         status = CAM_REQ_CMP;   /* Completed without error */
3480         target = NULL;          /* Wildcarded */
3481         device = NULL;          /* Wildcarded */
3482
3483         /*
3484          * We will potentially modify the EDT, so block interrupts
3485          * that may attempt to create cam paths.
3486          */
3487         bus = xpt_find_bus(path_id);
3488         if (bus == NULL) {
3489                 status = CAM_PATH_INVALID;
3490         } else {
3491                 xpt_lock_buses();
3492                 mtx_lock(&bus->eb_mtx);
3493                 target = xpt_find_target(bus, target_id);
3494                 if (target == NULL) {
3495                         /* Create one */
3496                         struct cam_et *new_target;
3497
3498                         new_target = xpt_alloc_target(bus, target_id);
3499                         if (new_target == NULL) {
3500                                 status = CAM_RESRC_UNAVAIL;
3501                         } else {
3502                                 target = new_target;
3503                         }
3504                 }
3505                 xpt_unlock_buses();
3506                 if (target != NULL) {
3507                         device = xpt_find_device(target, lun_id);
3508                         if (device == NULL) {
3509                                 /* Create one */
3510                                 struct cam_ed *new_device;
3511
3512                                 new_device =
3513                                     (*(bus->xport->ops->alloc_device))(bus,
3514                                                                        target,
3515                                                                        lun_id);
3516                                 if (new_device == NULL) {
3517                                         status = CAM_RESRC_UNAVAIL;
3518                                 } else {
3519                                         device = new_device;
3520                                 }
3521                         }
3522                 }
3523                 mtx_unlock(&bus->eb_mtx);
3524         }
3525
3526         /*
3527          * Only touch the user's data if we are successful.
3528          */
3529         if (status == CAM_REQ_CMP) {
3530                 new_path->periph = perph;
3531                 new_path->bus = bus;
3532                 new_path->target = target;
3533                 new_path->device = device;
3534                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3535         } else {
3536                 if (device != NULL)
3537                         xpt_release_device(device);
3538                 if (target != NULL)
3539                         xpt_release_target(target);
3540                 if (bus != NULL)
3541                         xpt_release_bus(bus);
3542         }
3543         return (status);
3544 }
3545
3546 cam_status
3547 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3548 {
3549         struct     cam_path *new_path;
3550
3551         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3552         if (new_path == NULL)
3553                 return(CAM_RESRC_UNAVAIL);
3554         xpt_copy_path(new_path, path);
3555         *new_path_ptr = new_path;
3556         return (CAM_REQ_CMP);
3557 }
3558
3559 void
3560 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3561 {
3562
3563         *new_path = *path;
3564         if (path->bus != NULL)
3565                 xpt_acquire_bus(path->bus);
3566         if (path->target != NULL)
3567                 xpt_acquire_target(path->target);
3568         if (path->device != NULL)
3569                 xpt_acquire_device(path->device);
3570 }
3571
3572 void
3573 xpt_release_path(struct cam_path *path)
3574 {
3575         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3576         if (path->device != NULL) {
3577                 xpt_release_device(path->device);
3578                 path->device = NULL;
3579         }
3580         if (path->target != NULL) {
3581                 xpt_release_target(path->target);
3582                 path->target = NULL;
3583         }
3584         if (path->bus != NULL) {
3585                 xpt_release_bus(path->bus);
3586                 path->bus = NULL;
3587         }
3588 }
3589
3590 void
3591 xpt_free_path(struct cam_path *path)
3592 {
3593
3594         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3595         xpt_release_path(path);
3596         free(path, M_CAMPATH);
3597 }
3598
3599 void
3600 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3601     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3602 {
3603
3604         xpt_lock_buses();
3605         if (bus_ref) {
3606                 if (path->bus)
3607                         *bus_ref = path->bus->refcount;
3608                 else
3609                         *bus_ref = 0;
3610         }
3611         if (periph_ref) {
3612                 if (path->periph)
3613                         *periph_ref = path->periph->refcount;
3614                 else
3615                         *periph_ref = 0;
3616         }
3617         xpt_unlock_buses();
3618         if (target_ref) {
3619                 if (path->target)
3620                         *target_ref = path->target->refcount;
3621                 else
3622                         *target_ref = 0;
3623         }
3624         if (device_ref) {
3625                 if (path->device)
3626                         *device_ref = path->device->refcount;
3627                 else
3628                         *device_ref = 0;
3629         }
3630 }
3631
3632 /*
3633  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3634  * in path1, 2 for match with wildcards in path2.
3635  */
3636 int
3637 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3638 {
3639         int retval = 0;
3640
3641         if (path1->bus != path2->bus) {
3642                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3643                         retval = 1;
3644                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3645                         retval = 2;
3646                 else
3647                         return (-1);
3648         }
3649         if (path1->target != path2->target) {
3650                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3651                         if (retval == 0)
3652                                 retval = 1;
3653                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3654                         retval = 2;
3655                 else
3656                         return (-1);
3657         }
3658         if (path1->device != path2->device) {
3659                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3660                         if (retval == 0)
3661                                 retval = 1;
3662                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3663                         retval = 2;
3664                 else
3665                         return (-1);
3666         }
3667         return (retval);
3668 }
3669
3670 int
3671 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3672 {
3673         int retval = 0;
3674
3675         if (path->bus != dev->target->bus) {
3676                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3677                         retval = 1;
3678                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3679                         retval = 2;
3680                 else
3681                         return (-1);
3682         }
3683         if (path->target != dev->target) {
3684                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3685                         if (retval == 0)
3686                                 retval = 1;
3687                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3688                         retval = 2;
3689                 else
3690                         return (-1);
3691         }
3692         if (path->device != dev) {
3693                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3694                         if (retval == 0)
3695                                 retval = 1;
3696                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3697                         retval = 2;
3698                 else
3699                         return (-1);
3700         }
3701         return (retval);
3702 }
3703
3704 void
3705 xpt_print_path(struct cam_path *path)
3706 {
3707         struct sbuf sb;
3708         char buffer[XPT_PRINT_LEN];
3709
3710         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3711         xpt_path_sbuf(path, &sb);
3712         sbuf_finish(&sb);
3713         printf("%s", sbuf_data(&sb));
3714         sbuf_delete(&sb);
3715 }
3716
3717 void
3718 xpt_print_device(struct cam_ed *device)
3719 {
3720
3721         if (device == NULL)
3722                 printf("(nopath): ");
3723         else {
3724                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3725                        device->sim->unit_number,
3726                        device->sim->bus_id,
3727                        device->target->target_id,
3728                        (uintmax_t)device->lun_id);
3729         }
3730 }
3731
3732 void
3733 xpt_print(struct cam_path *path, const char *fmt, ...)
3734 {
3735         va_list ap;
3736         struct sbuf sb;
3737         char buffer[XPT_PRINT_LEN];
3738
3739         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3740
3741         xpt_path_sbuf(path, &sb);
3742         va_start(ap, fmt);
3743         sbuf_vprintf(&sb, fmt, ap);
3744         va_end(ap);
3745
3746         sbuf_finish(&sb);
3747         printf("%s", sbuf_data(&sb));
3748         sbuf_delete(&sb);
3749 }
3750
3751 int
3752 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3753 {
3754         struct sbuf sb;
3755         int len;
3756
3757         sbuf_new(&sb, str, str_len, 0);
3758         len = xpt_path_sbuf(path, &sb);
3759         sbuf_finish(&sb);
3760         return (len);
3761 }
3762
3763 int
3764 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3765 {
3766
3767         if (path == NULL)
3768                 sbuf_printf(sb, "(nopath): ");
3769         else {
3770                 if (path->periph != NULL)
3771                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3772                                     path->periph->unit_number);
3773                 else
3774                         sbuf_printf(sb, "(noperiph:");
3775
3776                 if (path->bus != NULL)
3777                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3778                                     path->bus->sim->unit_number,
3779                                     path->bus->sim->bus_id);
3780                 else
3781                         sbuf_printf(sb, "nobus:");
3782
3783                 if (path->target != NULL)
3784                         sbuf_printf(sb, "%d:", path->target->target_id);
3785                 else
3786                         sbuf_printf(sb, "X:");
3787
3788                 if (path->device != NULL)
3789                         sbuf_printf(sb, "%jx): ",
3790                             (uintmax_t)path->device->lun_id);
3791                 else
3792                         sbuf_printf(sb, "X): ");
3793         }
3794
3795         return(sbuf_len(sb));
3796 }
3797
3798 path_id_t
3799 xpt_path_path_id(struct cam_path *path)
3800 {
3801         return(path->bus->path_id);
3802 }
3803
3804 target_id_t
3805 xpt_path_target_id(struct cam_path *path)
3806 {
3807         if (path->target != NULL)
3808                 return (path->target->target_id);
3809         else
3810                 return (CAM_TARGET_WILDCARD);
3811 }
3812
3813 lun_id_t
3814 xpt_path_lun_id(struct cam_path *path)
3815 {
3816         if (path->device != NULL)
3817                 return (path->device->lun_id);
3818         else
3819                 return (CAM_LUN_WILDCARD);
3820 }
3821
3822 struct cam_sim *
3823 xpt_path_sim(struct cam_path *path)
3824 {
3825
3826         return (path->bus->sim);
3827 }
3828
3829 struct cam_periph*
3830 xpt_path_periph(struct cam_path *path)
3831 {
3832
3833         return (path->periph);
3834 }
3835
3836 /*
3837  * Release a CAM control block for the caller.  Remit the cost of the structure
3838  * to the device referenced by the path.  If the this device had no 'credits'
3839  * and peripheral drivers have registered async callbacks for this notification
3840  * call them now.
3841  */
3842 void
3843 xpt_release_ccb(union ccb *free_ccb)
3844 {
3845         struct   cam_ed *device;
3846         struct   cam_periph *periph;
3847
3848         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3849         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3850         device = free_ccb->ccb_h.path->device;
3851         periph = free_ccb->ccb_h.path->periph;
3852
3853         xpt_free_ccb(free_ccb);
3854         periph->periph_allocated--;
3855         cam_ccbq_release_opening(&device->ccbq);
3856         xpt_run_allocq(periph, 0);
3857 }
3858
3859 /* Functions accessed by SIM drivers */
3860
3861 static struct xpt_xport_ops xport_default_ops = {
3862         .alloc_device = xpt_alloc_device_default,
3863         .action = xpt_action_default,
3864         .async = xpt_dev_async_default,
3865 };
3866 static struct xpt_xport xport_default = {
3867         .xport = XPORT_UNKNOWN,
3868         .name = "unknown",
3869         .ops = &xport_default_ops,
3870 };
3871
3872 CAM_XPT_XPORT(xport_default);
3873
3874 /*
3875  * A sim structure, listing the SIM entry points and instance
3876  * identification info is passed to xpt_bus_register to hook the SIM
3877  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3878  * for this new bus and places it in the array of buses and assigns
3879  * it a path_id.  The path_id may be influenced by "hard wiring"
3880  * information specified by the user.  Once interrupt services are
3881  * available, the bus will be probed.
3882  */
3883 int32_t
3884 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3885 {
3886         struct cam_eb *new_bus;
3887         struct cam_eb *old_bus;
3888         struct ccb_pathinq cpi;
3889         struct cam_path *path;
3890         cam_status status;
3891
3892         mtx_assert(sim->mtx, MA_OWNED);
3893
3894         sim->bus_id = bus;
3895         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3896                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3897         if (new_bus == NULL) {
3898                 /* Couldn't satisfy request */
3899                 return (CAM_RESRC_UNAVAIL);
3900         }
3901
3902         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3903         TAILQ_INIT(&new_bus->et_entries);
3904         cam_sim_hold(sim);
3905         new_bus->sim = sim;
3906         timevalclear(&new_bus->last_reset);
3907         new_bus->flags = 0;
3908         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3909         new_bus->generation = 0;
3910
3911         xpt_lock_buses();
3912         sim->path_id = new_bus->path_id =
3913             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3914         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3915         while (old_bus != NULL
3916             && old_bus->path_id < new_bus->path_id)
3917                 old_bus = TAILQ_NEXT(old_bus, links);
3918         if (old_bus != NULL)
3919                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3920         else
3921                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3922         xsoftc.bus_generation++;
3923         xpt_unlock_buses();
3924
3925         /*
3926          * Set a default transport so that a PATH_INQ can be issued to
3927          * the SIM.  This will then allow for probing and attaching of
3928          * a more appropriate transport.
3929          */
3930         new_bus->xport = &xport_default;
3931
3932         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3933                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3934         if (status != CAM_REQ_CMP) {
3935                 xpt_release_bus(new_bus);
3936                 free(path, M_CAMXPT);
3937                 return (CAM_RESRC_UNAVAIL);
3938         }
3939
3940         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3941         cpi.ccb_h.func_code = XPT_PATH_INQ;
3942         xpt_action((union ccb *)&cpi);
3943
3944         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3945                 struct xpt_xport **xpt;
3946
3947                 SET_FOREACH(xpt, cam_xpt_xport_set) {
3948                         if ((*xpt)->xport == cpi.transport) {
3949                                 new_bus->xport = *xpt;
3950                                 break;
3951                         }
3952                 }
3953                 if (new_bus->xport == NULL) {
3954                         xpt_print(path,
3955                             "No transport found for %d\n", cpi.transport);
3956                         xpt_release_bus(new_bus);
3957                         free(path, M_CAMXPT);
3958                         return (CAM_RESRC_UNAVAIL);
3959                 }
3960         }
3961
3962         /* Notify interested parties */
3963         if (sim->path_id != CAM_XPT_PATH_ID) {
3964
3965                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3966                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3967                         union   ccb *scan_ccb;
3968
3969                         /* Initiate bus rescan. */
3970                         scan_ccb = xpt_alloc_ccb_nowait();
3971                         if (scan_ccb != NULL) {
3972                                 scan_ccb->ccb_h.path = path;
3973                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3974                                 scan_ccb->crcn.flags = 0;
3975                                 xpt_rescan(scan_ccb);
3976                         } else {
3977                                 xpt_print(path,
3978                                           "Can't allocate CCB to scan bus\n");
3979                                 xpt_free_path(path);
3980                         }
3981                 } else
3982                         xpt_free_path(path);
3983         } else
3984                 xpt_free_path(path);
3985         return (CAM_SUCCESS);
3986 }
3987
3988 int32_t
3989 xpt_bus_deregister(path_id_t pathid)
3990 {
3991         struct cam_path bus_path;
3992         cam_status status;
3993
3994         status = xpt_compile_path(&bus_path, NULL, pathid,
3995                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3996         if (status != CAM_REQ_CMP)
3997                 return (status);
3998
3999         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4000         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4001
4002         /* Release the reference count held while registered. */
4003         xpt_release_bus(bus_path.bus);
4004         xpt_release_path(&bus_path);
4005
4006         return (CAM_REQ_CMP);
4007 }
4008
4009 static path_id_t
4010 xptnextfreepathid(void)
4011 {
4012         struct cam_eb *bus;
4013         path_id_t pathid;
4014         const char *strval;
4015
4016         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4017         pathid = 0;
4018         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4019 retry:
4020         /* Find an unoccupied pathid */
4021         while (bus != NULL && bus->path_id <= pathid) {
4022                 if (bus->path_id == pathid)
4023                         pathid++;
4024                 bus = TAILQ_NEXT(bus, links);
4025         }
4026
4027         /*
4028          * Ensure that this pathid is not reserved for
4029          * a bus that may be registered in the future.
4030          */
4031         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4032                 ++pathid;
4033                 /* Start the search over */
4034                 goto retry;
4035         }
4036         return (pathid);
4037 }
4038
4039 static path_id_t
4040 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4041 {
4042         path_id_t pathid;
4043         int i, dunit, val;
4044         char buf[32];
4045         const char *dname;
4046
4047         pathid = CAM_XPT_PATH_ID;
4048         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4049         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4050                 return (pathid);
4051         i = 0;
4052         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4053                 if (strcmp(dname, "scbus")) {
4054                         /* Avoid a bit of foot shooting. */
4055                         continue;
4056                 }
4057                 if (dunit < 0)          /* unwired?! */
4058                         continue;
4059                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4060                         if (sim_bus == val) {
4061                                 pathid = dunit;
4062                                 break;
4063                         }
4064                 } else if (sim_bus == 0) {
4065                         /* Unspecified matches bus 0 */
4066                         pathid = dunit;
4067                         break;
4068                 } else {
4069                         printf("Ambiguous scbus configuration for %s%d "
4070                                "bus %d, cannot wire down.  The kernel "
4071                                "config entry for scbus%d should "
4072                                "specify a controller bus.\n"
4073                                "Scbus will be assigned dynamically.\n",
4074                                sim_name, sim_unit, sim_bus, dunit);
4075                         break;
4076                 }
4077         }
4078
4079         if (pathid == CAM_XPT_PATH_ID)
4080                 pathid = xptnextfreepathid();
4081         return (pathid);
4082 }
4083
4084 static const char *
4085 xpt_async_string(u_int32_t async_code)
4086 {
4087
4088         switch (async_code) {
4089         case AC_BUS_RESET: return ("AC_BUS_RESET");
4090         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4091         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4092         case AC_SENT_BDR: return ("AC_SENT_BDR");
4093         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4094         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4095         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4096         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4097         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4098         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4099         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4100         case AC_CONTRACT: return ("AC_CONTRACT");
4101         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4102         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4103         }
4104         return ("AC_UNKNOWN");
4105 }
4106
4107 static int
4108 xpt_async_size(u_int32_t async_code)
4109 {
4110
4111         switch (async_code) {
4112         case AC_BUS_RESET: return (0);
4113         case AC_UNSOL_RESEL: return (0);
4114         case AC_SCSI_AEN: return (0);
4115         case AC_SENT_BDR: return (0);
4116         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4117         case AC_PATH_DEREGISTERED: return (0);
4118         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4119         case AC_LOST_DEVICE: return (0);
4120         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4121         case AC_INQ_CHANGED: return (0);
4122         case AC_GETDEV_CHANGED: return (0);
4123         case AC_CONTRACT: return (sizeof(struct ac_contract));
4124         case AC_ADVINFO_CHANGED: return (-1);
4125         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4126         }
4127         return (0);
4128 }
4129
4130 static int
4131 xpt_async_process_dev(struct cam_ed *device, void *arg)
4132 {
4133         union ccb *ccb = arg;
4134         struct cam_path *path = ccb->ccb_h.path;
4135         void *async_arg = ccb->casync.async_arg_ptr;
4136         u_int32_t async_code = ccb->casync.async_code;
4137         int relock;
4138
4139         if (path->device != device
4140          && path->device->lun_id != CAM_LUN_WILDCARD
4141          && device->lun_id != CAM_LUN_WILDCARD)
4142                 return (1);
4143
4144         /*
4145          * The async callback could free the device.
4146          * If it is a broadcast async, it doesn't hold
4147          * device reference, so take our own reference.
4148          */
4149         xpt_acquire_device(device);
4150
4151         /*
4152          * If async for specific device is to be delivered to
4153          * the wildcard client, take the specific device lock.
4154          * XXX: We may need a way for client to specify it.
4155          */
4156         if ((device->lun_id == CAM_LUN_WILDCARD &&
4157              path->device->lun_id != CAM_LUN_WILDCARD) ||
4158             (device->target->target_id == CAM_TARGET_WILDCARD &&
4159              path->target->target_id != CAM_TARGET_WILDCARD) ||
4160             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4161              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4162                 mtx_unlock(&device->device_mtx);
4163                 xpt_path_lock(path);
4164                 relock = 1;
4165         } else
4166                 relock = 0;
4167
4168         (*(device->target->bus->xport->ops->async))(async_code,
4169             device->target->bus, device->target, device, async_arg);
4170         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4171
4172         if (relock) {
4173                 xpt_path_unlock(path);
4174                 mtx_lock(&device->device_mtx);
4175         }
4176         xpt_release_device(device);
4177         return (1);
4178 }
4179
4180 static int
4181 xpt_async_process_tgt(struct cam_et *target, void *arg)
4182 {
4183         union ccb *ccb = arg;
4184         struct cam_path *path = ccb->ccb_h.path;
4185
4186         if (path->target != target
4187          && path->target->target_id != CAM_TARGET_WILDCARD
4188          && target->target_id != CAM_TARGET_WILDCARD)
4189                 return (1);
4190
4191         if (ccb->casync.async_code == AC_SENT_BDR) {
4192                 /* Update our notion of when the last reset occurred */
4193                 microtime(&target->last_reset);
4194         }
4195
4196         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4197 }
4198
4199 static void
4200 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4201 {
4202         struct cam_eb *bus;
4203         struct cam_path *path;
4204         void *async_arg;
4205         u_int32_t async_code;
4206
4207         path = ccb->ccb_h.path;
4208         async_code = ccb->casync.async_code;
4209         async_arg = ccb->casync.async_arg_ptr;
4210         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4211             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4212         bus = path->bus;
4213
4214         if (async_code == AC_BUS_RESET) {
4215                 /* Update our notion of when the last reset occurred */
4216                 microtime(&bus->last_reset);
4217         }
4218
4219         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4220
4221         /*
4222          * If this wasn't a fully wildcarded async, tell all
4223          * clients that want all async events.
4224          */
4225         if (bus != xpt_periph->path->bus) {
4226                 xpt_path_lock(xpt_periph->path);
4227                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4228                 xpt_path_unlock(xpt_periph->path);
4229         }
4230
4231         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4232                 xpt_release_devq(path, 1, TRUE);
4233         else
4234                 xpt_release_simq(path->bus->sim, TRUE);
4235         if (ccb->casync.async_arg_size > 0)
4236                 free(async_arg, M_CAMXPT);
4237         xpt_free_path(path);
4238         xpt_free_ccb(ccb);
4239 }
4240
4241 static void
4242 xpt_async_bcast(struct async_list *async_head,
4243                 u_int32_t async_code,
4244                 struct cam_path *path, void *async_arg)
4245 {
4246         struct async_node *cur_entry;
4247         int lock;
4248
4249         cur_entry = SLIST_FIRST(async_head);
4250         while (cur_entry != NULL) {
4251                 struct async_node *next_entry;
4252                 /*
4253                  * Grab the next list entry before we call the current
4254                  * entry's callback.  This is because the callback function
4255                  * can delete its async callback entry.
4256                  */
4257                 next_entry = SLIST_NEXT(cur_entry, links);
4258                 if ((cur_entry->event_enable & async_code) != 0) {
4259                         lock = cur_entry->event_lock;
4260                         if (lock)
4261                                 CAM_SIM_LOCK(path->device->sim);
4262                         cur_entry->callback(cur_entry->callback_arg,
4263                                             async_code, path,
4264                                             async_arg);
4265                         if (lock)
4266                                 CAM_SIM_UNLOCK(path->device->sim);
4267                 }
4268                 cur_entry = next_entry;
4269         }
4270 }
4271
4272 void
4273 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4274 {
4275         union ccb *ccb;
4276         int size;
4277
4278         ccb = xpt_alloc_ccb_nowait();
4279         if (ccb == NULL) {
4280                 xpt_print(path, "Can't allocate CCB to send %s\n",
4281                     xpt_async_string(async_code));
4282                 return;
4283         }
4284
4285         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4286                 xpt_print(path, "Can't allocate path to send %s\n",
4287                     xpt_async_string(async_code));
4288                 xpt_free_ccb(ccb);
4289                 return;
4290         }
4291         ccb->ccb_h.path->periph = NULL;
4292         ccb->ccb_h.func_code = XPT_ASYNC;
4293         ccb->ccb_h.cbfcnp = xpt_async_process;
4294         ccb->ccb_h.flags |= CAM_UNLOCKED;
4295         ccb->casync.async_code = async_code;
4296         ccb->casync.async_arg_size = 0;
4297         size = xpt_async_size(async_code);
4298         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4299             ("xpt_async: func %#x %s aync_code %d %s\n",
4300                 ccb->ccb_h.func_code,
4301                 xpt_action_name(ccb->ccb_h.func_code),
4302                 async_code,
4303                 xpt_async_string(async_code)));
4304         if (size > 0 && async_arg != NULL) {
4305                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4306                 if (ccb->casync.async_arg_ptr == NULL) {
4307                         xpt_print(path, "Can't allocate argument to send %s\n",
4308                             xpt_async_string(async_code));
4309                         xpt_free_path(ccb->ccb_h.path);
4310                         xpt_free_ccb(ccb);
4311                         return;
4312                 }
4313                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4314                 ccb->casync.async_arg_size = size;
4315         } else if (size < 0) {
4316                 ccb->casync.async_arg_ptr = async_arg;
4317                 ccb->casync.async_arg_size = size;
4318         }
4319         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4320                 xpt_freeze_devq(path, 1);
4321         else
4322                 xpt_freeze_simq(path->bus->sim, 1);
4323         xpt_done(ccb);
4324 }
4325
4326 static void
4327 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4328                       struct cam_et *target, struct cam_ed *device,
4329                       void *async_arg)
4330 {
4331
4332         /*
4333          * We only need to handle events for real devices.
4334          */
4335         if (target->target_id == CAM_TARGET_WILDCARD
4336          || device->lun_id == CAM_LUN_WILDCARD)
4337                 return;
4338
4339         printf("%s called\n", __func__);
4340 }
4341
4342 static uint32_t
4343 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4344 {
4345         struct cam_devq *devq;
4346         uint32_t freeze;
4347
4348         devq = dev->sim->devq;
4349         mtx_assert(&devq->send_mtx, MA_OWNED);
4350         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4351             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4352             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4353         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4354         /* Remove frozen device from sendq. */
4355         if (device_is_queued(dev))
4356                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4357         return (freeze);
4358 }
4359
4360 u_int32_t
4361 xpt_freeze_devq(struct cam_path *path, u_int count)
4362 {
4363         struct cam_ed   *dev = path->device;
4364         struct cam_devq *devq;
4365         uint32_t         freeze;
4366
4367         devq = dev->sim->devq;
4368         mtx_lock(&devq->send_mtx);
4369         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4370         freeze = xpt_freeze_devq_device(dev, count);
4371         mtx_unlock(&devq->send_mtx);
4372         return (freeze);
4373 }
4374
4375 u_int32_t
4376 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4377 {
4378         struct cam_devq *devq;
4379         uint32_t         freeze;
4380
4381         devq = sim->devq;
4382         mtx_lock(&devq->send_mtx);
4383         freeze = (devq->send_queue.qfrozen_cnt += count);
4384         mtx_unlock(&devq->send_mtx);
4385         return (freeze);
4386 }
4387
4388 static void
4389 xpt_release_devq_timeout(void *arg)
4390 {
4391         struct cam_ed *dev;
4392         struct cam_devq *devq;
4393
4394         dev = (struct cam_ed *)arg;
4395         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4396         devq = dev->sim->devq;
4397         mtx_assert(&devq->send_mtx, MA_OWNED);
4398         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4399                 xpt_run_devq(devq);
4400 }
4401
4402 void
4403 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4404 {
4405         struct cam_ed *dev;
4406         struct cam_devq *devq;
4407
4408         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4409             count, run_queue));
4410         dev = path->device;
4411         devq = dev->sim->devq;
4412         mtx_lock(&devq->send_mtx);
4413         if (xpt_release_devq_device(dev, count, run_queue))
4414                 xpt_run_devq(dev->sim->devq);
4415         mtx_unlock(&devq->send_mtx);
4416 }
4417
4418 static int
4419 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4420 {
4421
4422         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4423         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4424             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4425             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4426         if (count > dev->ccbq.queue.qfrozen_cnt) {
4427 #ifdef INVARIANTS
4428                 printf("xpt_release_devq(): requested %u > present %u\n",
4429                     count, dev->ccbq.queue.qfrozen_cnt);
4430 #endif
4431                 count = dev->ccbq.queue.qfrozen_cnt;
4432         }
4433         dev->ccbq.queue.qfrozen_cnt -= count;
4434         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4435                 /*
4436                  * No longer need to wait for a successful
4437                  * command completion.
4438                  */
4439                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4440                 /*
4441                  * Remove any timeouts that might be scheduled
4442                  * to release this queue.
4443                  */
4444                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4445                         callout_stop(&dev->callout);
4446                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4447                 }
4448                 /*
4449                  * Now that we are unfrozen schedule the
4450                  * device so any pending transactions are
4451                  * run.
4452                  */
4453                 xpt_schedule_devq(dev->sim->devq, dev);
4454         } else
4455                 run_queue = 0;
4456         return (run_queue);
4457 }
4458
4459 void
4460 xpt_release_simq(struct cam_sim *sim, int run_queue)
4461 {
4462         struct cam_devq *devq;
4463
4464         devq = sim->devq;
4465         mtx_lock(&devq->send_mtx);
4466         if (devq->send_queue.qfrozen_cnt <= 0) {
4467 #ifdef INVARIANTS
4468                 printf("xpt_release_simq: requested 1 > present %u\n",
4469                     devq->send_queue.qfrozen_cnt);
4470 #endif
4471         } else
4472                 devq->send_queue.qfrozen_cnt--;
4473         if (devq->send_queue.qfrozen_cnt == 0) {
4474                 /*
4475                  * If there is a timeout scheduled to release this
4476                  * sim queue, remove it.  The queue frozen count is
4477                  * already at 0.
4478                  */
4479                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4480                         callout_stop(&sim->callout);
4481                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4482                 }
4483                 if (run_queue) {
4484                         /*
4485                          * Now that we are unfrozen run the send queue.
4486                          */
4487                         xpt_run_devq(sim->devq);
4488                 }
4489         }
4490         mtx_unlock(&devq->send_mtx);
4491 }
4492
4493 /*
4494  * XXX Appears to be unused.
4495  */
4496 static void
4497 xpt_release_simq_timeout(void *arg)
4498 {
4499         struct cam_sim *sim;
4500
4501         sim = (struct cam_sim *)arg;
4502         xpt_release_simq(sim, /* run_queue */ TRUE);
4503 }
4504
4505 void
4506 xpt_done(union ccb *done_ccb)
4507 {
4508         struct cam_doneq *queue;
4509         int     run, hash;
4510
4511 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4512         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4513             done_ccb->csio.bio != NULL)
4514                 biotrack(done_ccb->csio.bio, __func__);
4515 #endif
4516
4517         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4518             ("xpt_done: func= %#x %s status %#x\n",
4519                 done_ccb->ccb_h.func_code,
4520                 xpt_action_name(done_ccb->ccb_h.func_code),
4521                 done_ccb->ccb_h.status));
4522         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4523                 return;
4524
4525         /* Store the time the ccb was in the sim */
4526         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4527         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4528             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4529         queue = &cam_doneqs[hash];
4530         mtx_lock(&queue->cam_doneq_mtx);
4531         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4532         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4533         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4534         mtx_unlock(&queue->cam_doneq_mtx);
4535         if (run)
4536                 wakeup(&queue->cam_doneq);
4537 }
4538
4539 void
4540 xpt_done_direct(union ccb *done_ccb)
4541 {
4542
4543         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4544             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4545         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4546                 return;
4547
4548         /* Store the time the ccb was in the sim */
4549         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4550         xpt_done_process(&done_ccb->ccb_h);
4551 }
4552
4553 union ccb *
4554 xpt_alloc_ccb()
4555 {
4556         union ccb *new_ccb;
4557
4558         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4559         return (new_ccb);
4560 }
4561
4562 union ccb *
4563 xpt_alloc_ccb_nowait()
4564 {
4565         union ccb *new_ccb;
4566
4567         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4568         return (new_ccb);
4569 }
4570
4571 void
4572 xpt_free_ccb(union ccb *free_ccb)
4573 {
4574         free(free_ccb, M_CAMCCB);
4575 }
4576
4577
4578
4579 /* Private XPT functions */
4580
4581 /*
4582  * Get a CAM control block for the caller. Charge the structure to the device
4583  * referenced by the path.  If we don't have sufficient resources to allocate
4584  * more ccbs, we return NULL.
4585  */
4586 static union ccb *
4587 xpt_get_ccb_nowait(struct cam_periph *periph)
4588 {
4589         union ccb *new_ccb;
4590
4591         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4592         if (new_ccb == NULL)
4593                 return (NULL);
4594         periph->periph_allocated++;
4595         cam_ccbq_take_opening(&periph->path->device->ccbq);
4596         return (new_ccb);
4597 }
4598
4599 static union ccb *
4600 xpt_get_ccb(struct cam_periph *periph)
4601 {
4602         union ccb *new_ccb;
4603
4604         cam_periph_unlock(periph);
4605         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4606         cam_periph_lock(periph);
4607         periph->periph_allocated++;
4608         cam_ccbq_take_opening(&periph->path->device->ccbq);
4609         return (new_ccb);
4610 }
4611
4612 union ccb *
4613 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4614 {
4615         struct ccb_hdr *ccb_h;
4616
4617         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4618         cam_periph_assert(periph, MA_OWNED);
4619         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4620             ccb_h->pinfo.priority != priority) {
4621                 if (priority < periph->immediate_priority) {
4622                         periph->immediate_priority = priority;
4623                         xpt_run_allocq(periph, 0);
4624                 } else
4625                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4626                             "cgticb", 0);
4627         }
4628         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4629         return ((union ccb *)ccb_h);
4630 }
4631
4632 static void
4633 xpt_acquire_bus(struct cam_eb *bus)
4634 {
4635
4636         xpt_lock_buses();
4637         bus->refcount++;
4638         xpt_unlock_buses();
4639 }
4640
4641 static void
4642 xpt_release_bus(struct cam_eb *bus)
4643 {
4644
4645         xpt_lock_buses();
4646         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4647         if (--bus->refcount > 0) {
4648                 xpt_unlock_buses();
4649                 return;
4650         }
4651         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4652         xsoftc.bus_generation++;
4653         xpt_unlock_buses();
4654         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4655             ("destroying bus, but target list is not empty"));
4656         cam_sim_release(bus->sim);
4657         mtx_destroy(&bus->eb_mtx);
4658         free(bus, M_CAMXPT);
4659 }
4660
4661 static struct cam_et *
4662 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4663 {
4664         struct cam_et *cur_target, *target;
4665
4666         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4667         mtx_assert(&bus->eb_mtx, MA_OWNED);
4668         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4669                                          M_NOWAIT|M_ZERO);
4670         if (target == NULL)
4671                 return (NULL);
4672
4673         TAILQ_INIT(&target->ed_entries);
4674         target->bus = bus;
4675         target->target_id = target_id;
4676         target->refcount = 1;
4677         target->generation = 0;
4678         target->luns = NULL;
4679         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4680         timevalclear(&target->last_reset);
4681         /*
4682          * Hold a reference to our parent bus so it
4683          * will not go away before we do.
4684          */
4685         bus->refcount++;
4686
4687         /* Insertion sort into our bus's target list */
4688         cur_target = TAILQ_FIRST(&bus->et_entries);
4689         while (cur_target != NULL && cur_target->target_id < target_id)
4690                 cur_target = TAILQ_NEXT(cur_target, links);
4691         if (cur_target != NULL) {
4692                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4693         } else {
4694                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4695         }
4696         bus->generation++;
4697         return (target);
4698 }
4699
4700 static void
4701 xpt_acquire_target(struct cam_et *target)
4702 {
4703         struct cam_eb *bus = target->bus;
4704
4705         mtx_lock(&bus->eb_mtx);
4706         target->refcount++;
4707         mtx_unlock(&bus->eb_mtx);
4708 }
4709
4710 static void
4711 xpt_release_target(struct cam_et *target)
4712 {
4713         struct cam_eb *bus = target->bus;
4714
4715         mtx_lock(&bus->eb_mtx);
4716         if (--target->refcount > 0) {
4717                 mtx_unlock(&bus->eb_mtx);
4718                 return;
4719         }
4720         TAILQ_REMOVE(&bus->et_entries, target, links);
4721         bus->generation++;
4722         mtx_unlock(&bus->eb_mtx);
4723         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4724             ("destroying target, but device list is not empty"));
4725         xpt_release_bus(bus);
4726         mtx_destroy(&target->luns_mtx);
4727         if (target->luns)
4728                 free(target->luns, M_CAMXPT);
4729         free(target, M_CAMXPT);
4730 }
4731
4732 static struct cam_ed *
4733 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4734                          lun_id_t lun_id)
4735 {
4736         struct cam_ed *device;
4737
4738         device = xpt_alloc_device(bus, target, lun_id);
4739         if (device == NULL)
4740                 return (NULL);
4741
4742         device->mintags = 1;
4743         device->maxtags = 1;
4744         return (device);
4745 }
4746
4747 static void
4748 xpt_destroy_device(void *context, int pending)
4749 {
4750         struct cam_ed   *device = context;
4751
4752         mtx_lock(&device->device_mtx);
4753         mtx_destroy(&device->device_mtx);
4754         free(device, M_CAMDEV);
4755 }
4756
4757 struct cam_ed *
4758 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4759 {
4760         struct cam_ed   *cur_device, *device;
4761         struct cam_devq *devq;
4762         cam_status status;
4763
4764         mtx_assert(&bus->eb_mtx, MA_OWNED);
4765         /* Make space for us in the device queue on our bus */
4766         devq = bus->sim->devq;
4767         mtx_lock(&devq->send_mtx);
4768         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4769         mtx_unlock(&devq->send_mtx);
4770         if (status != CAM_REQ_CMP)
4771                 return (NULL);
4772
4773         device = (struct cam_ed *)malloc(sizeof(*device),
4774                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4775         if (device == NULL)
4776                 return (NULL);
4777
4778         cam_init_pinfo(&device->devq_entry);
4779         device->target = target;
4780         device->lun_id = lun_id;
4781         device->sim = bus->sim;
4782         if (cam_ccbq_init(&device->ccbq,
4783                           bus->sim->max_dev_openings) != 0) {
4784                 free(device, M_CAMDEV);
4785                 return (NULL);
4786         }
4787         SLIST_INIT(&device->asyncs);
4788         SLIST_INIT(&device->periphs);
4789         device->generation = 0;
4790         device->flags = CAM_DEV_UNCONFIGURED;
4791         device->tag_delay_count = 0;
4792         device->tag_saved_openings = 0;
4793         device->refcount = 1;
4794         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4795         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4796         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4797         /*
4798          * Hold a reference to our parent bus so it
4799          * will not go away before we do.
4800          */
4801         target->refcount++;
4802
4803         cur_device = TAILQ_FIRST(&target->ed_entries);
4804         while (cur_device != NULL && cur_device->lun_id < lun_id)
4805                 cur_device = TAILQ_NEXT(cur_device, links);
4806         if (cur_device != NULL)
4807                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4808         else
4809                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4810         target->generation++;
4811         return (device);
4812 }
4813
4814 void
4815 xpt_acquire_device(struct cam_ed *device)
4816 {
4817         struct cam_eb *bus = device->target->bus;
4818
4819         mtx_lock(&bus->eb_mtx);
4820         device->refcount++;
4821         mtx_unlock(&bus->eb_mtx);
4822 }
4823
4824 void
4825 xpt_release_device(struct cam_ed *device)
4826 {
4827         struct cam_eb *bus = device->target->bus;
4828         struct cam_devq *devq;
4829
4830         mtx_lock(&bus->eb_mtx);
4831         if (--device->refcount > 0) {
4832                 mtx_unlock(&bus->eb_mtx);
4833                 return;
4834         }
4835
4836         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4837         device->target->generation++;
4838         mtx_unlock(&bus->eb_mtx);
4839
4840         /* Release our slot in the devq */
4841         devq = bus->sim->devq;
4842         mtx_lock(&devq->send_mtx);
4843         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4844         mtx_unlock(&devq->send_mtx);
4845
4846         KASSERT(SLIST_EMPTY(&device->periphs),
4847             ("destroying device, but periphs list is not empty"));
4848         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4849             ("destroying device while still queued for ccbs"));
4850
4851         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4852                 callout_stop(&device->callout);
4853
4854         xpt_release_target(device->target);
4855
4856         cam_ccbq_fini(&device->ccbq);
4857         /*
4858          * Free allocated memory.  free(9) does nothing if the
4859          * supplied pointer is NULL, so it is safe to call without
4860          * checking.
4861          */
4862         free(device->supported_vpds, M_CAMXPT);
4863         free(device->device_id, M_CAMXPT);
4864         free(device->ext_inq, M_CAMXPT);
4865         free(device->physpath, M_CAMXPT);
4866         free(device->rcap_buf, M_CAMXPT);
4867         free(device->serial_num, M_CAMXPT);
4868         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4869 }
4870
4871 u_int32_t
4872 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4873 {
4874         int     result;
4875         struct  cam_ed *dev;
4876
4877         dev = path->device;
4878         mtx_lock(&dev->sim->devq->send_mtx);
4879         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4880         mtx_unlock(&dev->sim->devq->send_mtx);
4881         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4882          || (dev->inq_flags & SID_CmdQue) != 0)
4883                 dev->tag_saved_openings = newopenings;
4884         return (result);
4885 }
4886
4887 static struct cam_eb *
4888 xpt_find_bus(path_id_t path_id)
4889 {
4890         struct cam_eb *bus;
4891
4892         xpt_lock_buses();
4893         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4894              bus != NULL;
4895              bus = TAILQ_NEXT(bus, links)) {
4896                 if (bus->path_id == path_id) {
4897                         bus->refcount++;
4898                         break;
4899                 }
4900         }
4901         xpt_unlock_buses();
4902         return (bus);
4903 }
4904
4905 static struct cam_et *
4906 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4907 {
4908         struct cam_et *target;
4909
4910         mtx_assert(&bus->eb_mtx, MA_OWNED);
4911         for (target = TAILQ_FIRST(&bus->et_entries);
4912              target != NULL;
4913              target = TAILQ_NEXT(target, links)) {
4914                 if (target->target_id == target_id) {
4915                         target->refcount++;
4916                         break;
4917                 }
4918         }
4919         return (target);
4920 }
4921
4922 static struct cam_ed *
4923 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4924 {
4925         struct cam_ed *device;
4926
4927         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4928         for (device = TAILQ_FIRST(&target->ed_entries);
4929              device != NULL;
4930              device = TAILQ_NEXT(device, links)) {
4931                 if (device->lun_id == lun_id) {
4932                         device->refcount++;
4933                         break;
4934                 }
4935         }
4936         return (device);
4937 }
4938
4939 void
4940 xpt_start_tags(struct cam_path *path)
4941 {
4942         struct ccb_relsim crs;
4943         struct cam_ed *device;
4944         struct cam_sim *sim;
4945         int    newopenings;
4946
4947         device = path->device;
4948         sim = path->bus->sim;
4949         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4950         xpt_freeze_devq(path, /*count*/1);
4951         device->inq_flags |= SID_CmdQue;
4952         if (device->tag_saved_openings != 0)
4953                 newopenings = device->tag_saved_openings;
4954         else
4955                 newopenings = min(device->maxtags,
4956                                   sim->max_tagged_dev_openings);
4957         xpt_dev_ccbq_resize(path, newopenings);
4958         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4959         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4960         crs.ccb_h.func_code = XPT_REL_SIMQ;
4961         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4962         crs.openings
4963             = crs.release_timeout
4964             = crs.qfrozen_cnt
4965             = 0;
4966         xpt_action((union ccb *)&crs);
4967 }
4968
4969 void
4970 xpt_stop_tags(struct cam_path *path)
4971 {
4972         struct ccb_relsim crs;
4973         struct cam_ed *device;
4974         struct cam_sim *sim;
4975
4976         device = path->device;
4977         sim = path->bus->sim;
4978         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4979         device->tag_delay_count = 0;
4980         xpt_freeze_devq(path, /*count*/1);
4981         device->inq_flags &= ~SID_CmdQue;
4982         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4983         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4984         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4985         crs.ccb_h.func_code = XPT_REL_SIMQ;
4986         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4987         crs.openings
4988             = crs.release_timeout
4989             = crs.qfrozen_cnt
4990             = 0;
4991         xpt_action((union ccb *)&crs);
4992 }
4993
4994 static void
4995 xpt_boot_delay(void *arg)
4996 {
4997
4998         xpt_release_boot();
4999 }
5000
5001 static void
5002 xpt_config(void *arg)
5003 {
5004         /*
5005          * Now that interrupts are enabled, go find our devices
5006          */
5007         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5008                 printf("xpt_config: failed to create taskqueue thread.\n");
5009
5010         /* Setup debugging path */
5011         if (cam_dflags != CAM_DEBUG_NONE) {
5012                 if (xpt_create_path(&cam_dpath, NULL,
5013                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5014                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5015                         printf("xpt_config: xpt_create_path() failed for debug"
5016                                " target %d:%d:%d, debugging disabled\n",
5017                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5018                         cam_dflags = CAM_DEBUG_NONE;
5019                 }
5020         } else
5021                 cam_dpath = NULL;
5022
5023         periphdriver_init(1);
5024         xpt_hold_boot();
5025         callout_init(&xsoftc.boot_callout, 1);
5026         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5027             xpt_boot_delay, NULL, 0);
5028         /* Fire up rescan thread. */
5029         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5030             "cam", "scanner")) {
5031                 printf("xpt_config: failed to create rescan thread.\n");
5032         }
5033 }
5034
5035 void
5036 xpt_hold_boot(void)
5037 {
5038         xpt_lock_buses();
5039         xsoftc.buses_to_config++;
5040         xpt_unlock_buses();
5041 }
5042
5043 void
5044 xpt_release_boot(void)
5045 {
5046         xpt_lock_buses();
5047         xsoftc.buses_to_config--;
5048         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5049                 struct  xpt_task *task;
5050
5051                 xsoftc.buses_config_done = 1;
5052                 xpt_unlock_buses();
5053                 /* Call manually because we don't have any buses */
5054                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5055                 if (task != NULL) {
5056                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5057                         taskqueue_enqueue(taskqueue_thread, &task->task);
5058                 }
5059         } else
5060                 xpt_unlock_buses();
5061 }
5062
5063 /*
5064  * If the given device only has one peripheral attached to it, and if that
5065  * peripheral is the passthrough driver, announce it.  This insures that the
5066  * user sees some sort of announcement for every peripheral in their system.
5067  */
5068 static int
5069 xptpassannouncefunc(struct cam_ed *device, void *arg)
5070 {
5071         struct cam_periph *periph;
5072         int i;
5073
5074         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5075              periph = SLIST_NEXT(periph, periph_links), i++);
5076
5077         periph = SLIST_FIRST(&device->periphs);
5078         if ((i == 1)
5079          && (strncmp(periph->periph_name, "pass", 4) == 0))
5080                 xpt_announce_periph(periph, NULL);
5081
5082         return(1);
5083 }
5084
5085 static void
5086 xpt_finishconfig_task(void *context, int pending)
5087 {
5088
5089         periphdriver_init(2);
5090         /*
5091          * Check for devices with no "standard" peripheral driver
5092          * attached.  For any devices like that, announce the
5093          * passthrough driver so the user will see something.
5094          */
5095         if (!bootverbose)
5096                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5097
5098         /* Release our hook so that the boot can continue. */
5099         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5100         free(xsoftc.xpt_config_hook, M_CAMXPT);
5101         xsoftc.xpt_config_hook = NULL;
5102
5103         free(context, M_CAMXPT);
5104 }
5105
5106 cam_status
5107 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5108                    struct cam_path *path)
5109 {
5110         struct ccb_setasync csa;
5111         cam_status status;
5112         int xptpath = 0;
5113
5114         if (path == NULL) {
5115                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5116                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5117                 if (status != CAM_REQ_CMP)
5118                         return (status);
5119                 xpt_path_lock(path);
5120                 xptpath = 1;
5121         }
5122
5123         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5124         csa.ccb_h.func_code = XPT_SASYNC_CB;
5125         csa.event_enable = event;
5126         csa.callback = cbfunc;
5127         csa.callback_arg = cbarg;
5128         xpt_action((union ccb *)&csa);
5129         status = csa.ccb_h.status;
5130
5131         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5132             ("xpt_register_async: func %p\n", cbfunc));
5133
5134         if (xptpath) {
5135                 xpt_path_unlock(path);
5136                 xpt_free_path(path);
5137         }
5138
5139         if ((status == CAM_REQ_CMP) &&
5140             (csa.event_enable & AC_FOUND_DEVICE)) {
5141                 /*
5142                  * Get this peripheral up to date with all
5143                  * the currently existing devices.
5144                  */
5145                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5146         }
5147         if ((status == CAM_REQ_CMP) &&
5148             (csa.event_enable & AC_PATH_REGISTERED)) {
5149                 /*
5150                  * Get this peripheral up to date with all
5151                  * the currently existing buses.
5152                  */
5153                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5154         }
5155
5156         return (status);
5157 }
5158
5159 static void
5160 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5161 {
5162         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5163
5164         switch (work_ccb->ccb_h.func_code) {
5165         /* Common cases first */
5166         case XPT_PATH_INQ:              /* Path routing inquiry */
5167         {
5168                 struct ccb_pathinq *cpi;
5169
5170                 cpi = &work_ccb->cpi;
5171                 cpi->version_num = 1; /* XXX??? */
5172                 cpi->hba_inquiry = 0;
5173                 cpi->target_sprt = 0;
5174                 cpi->hba_misc = 0;
5175                 cpi->hba_eng_cnt = 0;
5176                 cpi->max_target = 0;
5177                 cpi->max_lun = 0;
5178                 cpi->initiator_id = 0;
5179                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5180                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5181                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5182                 cpi->unit_number = sim->unit_number;
5183                 cpi->bus_id = sim->bus_id;
5184                 cpi->base_transfer_speed = 0;
5185                 cpi->protocol = PROTO_UNSPECIFIED;
5186                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5187                 cpi->transport = XPORT_UNSPECIFIED;
5188                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5189                 cpi->ccb_h.status = CAM_REQ_CMP;
5190                 xpt_done(work_ccb);
5191                 break;
5192         }
5193         default:
5194                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5195                 xpt_done(work_ccb);
5196                 break;
5197         }
5198 }
5199
5200 /*
5201  * The xpt as a "controller" has no interrupt sources, so polling
5202  * is a no-op.
5203  */
5204 static void
5205 xptpoll(struct cam_sim *sim)
5206 {
5207 }
5208
5209 void
5210 xpt_lock_buses(void)
5211 {
5212         mtx_lock(&xsoftc.xpt_topo_lock);
5213 }
5214
5215 void
5216 xpt_unlock_buses(void)
5217 {
5218         mtx_unlock(&xsoftc.xpt_topo_lock);
5219 }
5220
5221 struct mtx *
5222 xpt_path_mtx(struct cam_path *path)
5223 {
5224
5225         return (&path->device->device_mtx);
5226 }
5227
5228 static void
5229 xpt_done_process(struct ccb_hdr *ccb_h)
5230 {
5231         struct cam_sim *sim;
5232         struct cam_devq *devq;
5233         struct mtx *mtx = NULL;
5234
5235 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5236         struct ccb_scsiio *csio;
5237
5238         if (ccb_h->func_code == XPT_SCSI_IO) {
5239                 csio = &((union ccb *)ccb_h)->csio;
5240                 if (csio->bio != NULL)
5241                         biotrack(csio->bio, __func__);
5242         }
5243 #endif
5244
5245         if (ccb_h->flags & CAM_HIGH_POWER) {
5246                 struct highpowerlist    *hphead;
5247                 struct cam_ed           *device;
5248
5249                 mtx_lock(&xsoftc.xpt_highpower_lock);
5250                 hphead = &xsoftc.highpowerq;
5251
5252                 device = STAILQ_FIRST(hphead);
5253
5254                 /*
5255                  * Increment the count since this command is done.
5256                  */
5257                 xsoftc.num_highpower++;
5258
5259                 /*
5260                  * Any high powered commands queued up?
5261                  */
5262                 if (device != NULL) {
5263
5264                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5265                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5266
5267                         mtx_lock(&device->sim->devq->send_mtx);
5268                         xpt_release_devq_device(device,
5269                                          /*count*/1, /*runqueue*/TRUE);
5270                         mtx_unlock(&device->sim->devq->send_mtx);
5271                 } else
5272                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5273         }
5274
5275         sim = ccb_h->path->bus->sim;
5276
5277         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5278                 xpt_release_simq(sim, /*run_queue*/FALSE);
5279                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5280         }
5281
5282         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5283          && (ccb_h->status & CAM_DEV_QFRZN)) {
5284                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5285                 ccb_h->status &= ~CAM_DEV_QFRZN;
5286         }
5287
5288         devq = sim->devq;
5289         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5290                 struct cam_ed *dev = ccb_h->path->device;
5291
5292                 mtx_lock(&devq->send_mtx);
5293                 devq->send_active--;
5294                 devq->send_openings++;
5295                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5296
5297                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5298                   && (dev->ccbq.dev_active == 0))) {
5299                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5300                         xpt_release_devq_device(dev, /*count*/1,
5301                                          /*run_queue*/FALSE);
5302                 }
5303
5304                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5305                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5306                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5307                         xpt_release_devq_device(dev, /*count*/1,
5308                                          /*run_queue*/FALSE);
5309                 }
5310
5311                 if (!device_is_queued(dev))
5312                         (void)xpt_schedule_devq(devq, dev);
5313                 xpt_run_devq(devq);
5314                 mtx_unlock(&devq->send_mtx);
5315
5316                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5317                         mtx = xpt_path_mtx(ccb_h->path);
5318                         mtx_lock(mtx);
5319
5320                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5321                          && (--dev->tag_delay_count == 0))
5322                                 xpt_start_tags(ccb_h->path);
5323                 }
5324         }
5325
5326         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5327                 if (mtx == NULL) {
5328                         mtx = xpt_path_mtx(ccb_h->path);
5329                         mtx_lock(mtx);
5330                 }
5331         } else {
5332                 if (mtx != NULL) {
5333                         mtx_unlock(mtx);
5334                         mtx = NULL;
5335                 }
5336         }
5337
5338         /* Call the peripheral driver's callback */
5339         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5340         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5341         if (mtx != NULL)
5342                 mtx_unlock(mtx);
5343 }
5344
5345 void
5346 xpt_done_td(void *arg)
5347 {
5348         struct cam_doneq *queue = arg;
5349         struct ccb_hdr *ccb_h;
5350         STAILQ_HEAD(, ccb_hdr)  doneq;
5351
5352         STAILQ_INIT(&doneq);
5353         mtx_lock(&queue->cam_doneq_mtx);
5354         while (1) {
5355                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5356                         queue->cam_doneq_sleep = 1;
5357                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5358                             PRIBIO, "-", 0);
5359                         queue->cam_doneq_sleep = 0;
5360                 }
5361                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5362                 mtx_unlock(&queue->cam_doneq_mtx);
5363
5364                 THREAD_NO_SLEEPING();
5365                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5366                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5367                         xpt_done_process(ccb_h);
5368                 }
5369                 THREAD_SLEEPING_OK();
5370
5371                 mtx_lock(&queue->cam_doneq_mtx);
5372         }
5373 }
5374
5375 static void
5376 camisr_runqueue(void)
5377 {
5378         struct  ccb_hdr *ccb_h;
5379         struct cam_doneq *queue;
5380         int i;
5381
5382         /* Process global queues. */
5383         for (i = 0; i < cam_num_doneqs; i++) {
5384                 queue = &cam_doneqs[i];
5385                 mtx_lock(&queue->cam_doneq_mtx);
5386                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5387                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5388                         mtx_unlock(&queue->cam_doneq_mtx);
5389                         xpt_done_process(ccb_h);
5390                         mtx_lock(&queue->cam_doneq_mtx);
5391                 }
5392                 mtx_unlock(&queue->cam_doneq_mtx);
5393         }
5394 }
5395
5396 struct kv
5397 {
5398         uint32_t v;
5399         const char *name;
5400 };
5401
5402 static struct kv map[] = {
5403         { XPT_NOOP, "XPT_NOOP" },
5404         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5405         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5406         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5407         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5408         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5409         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5410         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5411         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5412         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5413         { XPT_DEBUG, "XPT_DEBUG" },
5414         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5415         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5416         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5417         { XPT_ASYNC, "XPT_ASYNC" },
5418         { XPT_ABORT, "XPT_ABORT" },
5419         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5420         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5421         { XPT_TERM_IO, "XPT_TERM_IO" },
5422         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5423         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5424         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5425         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5426         { XPT_ATA_IO, "XPT_ATA_IO" },
5427         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5428         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5429         { XPT_NVME_IO, "XPT_NVME_IO" },
5430         { XPT_MMCSD_IO, "XPT_MMCSD_IO" },
5431         { XPT_SMP_IO, "XPT_SMP_IO" },
5432         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5433         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5434         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5435         { XPT_EN_LUN, "XPT_EN_LUN" },
5436         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5437         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5438         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5439         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5440         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5441         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5442         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5443         { 0, 0 }
5444 };
5445
5446 static const char *
5447 xpt_action_name(uint32_t action)
5448 {
5449         static char buffer[32]; /* Only for unknown messages -- racy */
5450         struct kv *walker = map;
5451
5452         while (walker->name != NULL) {
5453                 if (walker->v == action)
5454                         return (walker->name);
5455                 walker++;
5456         }
5457
5458         snprintf(buffer, sizeof(buffer), "%#x", action);
5459         return (buffer);
5460 }