sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/bus.h>
  35 #include <sys/systm.h>
  36 #include <sys/types.h>
  37 #include <sys/malloc.h>
  38 #include <sys/kernel.h>
  39 #include <sys/time.h>
  40 #include <sys/conf.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/interrupt.h>
  43 #include <sys/proc.h>
  44 #include <sys/sbuf.h>
  45 #include <sys/smp.h>
  46 #include <sys/taskqueue.h>
  47
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/kthread.h>
  52
  53 #include <cam/cam.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/cam_periph.h>
  56 #include <cam/cam_queue.h>
  57 #include <cam/cam_sim.h>
  58 #include <cam/cam_xpt.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt_periph.h>
  61 #include <cam/cam_xpt_internal.h>
  62 #include <cam/cam_debug.h>
  63 #include <cam/cam_compat.h>
  64
  65 #include <cam/scsi/scsi_all.h>
  66 #include <cam/scsi/scsi_message.h>
  67 #include <cam/scsi/scsi_pass.h>
  68
  69 #include <machine/md_var.h>     /* geometry translation */
  70 #include <machine/stdarg.h>     /* for xpt_print below */
  71
  72 #include "opt_cam.h"
  73
  74 /*
  75  * This is the maximum number of high powered commands (e.g. start unit)
  76  * that can be outstanding at a particular time.
  77  */
  78 #ifndef CAM_MAX_HIGHPOWER
  79 #define CAM_MAX_HIGHPOWER  4
  80 #endif
  81
  82 /* Datastructures internal to the xpt layer */
  83 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  84 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  85 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  86 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  87
  88 /* Object for defering XPT actions to a taskqueue */
  89 struct xpt_task {
  90         struct task     task;
  91         void            *data1;
  92         uintptr_t       data2;
  93 };
  94
  95 struct xpt_softc {
  96         uint32_t                xpt_generation;
  97
  98         /* number of high powered commands that can go through right now */
  99         struct mtx              xpt_highpower_lock;
 100         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 101         int                     num_highpower;
 102
 103         /* queue for handling async rescan requests. */
 104         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 105         int buses_to_config;
 106         int buses_config_done;
 107
 108         /* Registered busses */
 109         TAILQ_HEAD(,cam_eb)     xpt_busses;
 110         u_int                   bus_generation;
 111
 112         struct intr_config_hook *xpt_config_hook;
 113
 114         int                     boot_delay;
 115         struct callout          boot_callout;
 116
 117         struct mtx              xpt_topo_lock;
 118         struct mtx              xpt_lock;
 119         struct taskqueue        *xpt_taskq;
 120 };
 121
 122 typedef enum {
 123         DM_RET_COPY             = 0x01,
 124         DM_RET_FLAG_MASK        = 0x0f,
 125         DM_RET_NONE             = 0x00,
 126         DM_RET_STOP             = 0x10,
 127         DM_RET_DESCEND          = 0x20,
 128         DM_RET_ERROR            = 0x30,
 129         DM_RET_ACTION_MASK      = 0xf0
 130 } dev_match_ret;
 131
 132 typedef enum {
 133         XPT_DEPTH_BUS,
 134         XPT_DEPTH_TARGET,
 135         XPT_DEPTH_DEVICE,
 136         XPT_DEPTH_PERIPH
 137 } xpt_traverse_depth;
 138
 139 struct xpt_traverse_config {
 140         xpt_traverse_depth      depth;
 141         void                    *tr_func;
 142         void                    *tr_arg;
 143 };
 144
 145 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 146 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 147 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 148 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 149 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 150
 151 /* Transport layer configuration information */
 152 static struct xpt_softc xsoftc;
 153
 154 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 155
 156 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 157            &xsoftc.boot_delay, 0, "Bus registration wait time");
 158 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 159             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 160
 161 struct cam_doneq {
 162         struct mtx_padalign     cam_doneq_mtx;
 163         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 164         int                     cam_doneq_sleep;
 165 };
 166
 167 static struct cam_doneq cam_doneqs[MAXCPU];
 168 static int cam_num_doneqs;
 169 static struct proc *cam_proc;
 170
 171 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 172            &cam_num_doneqs, 0, "Number of completion queues/threads");
 173
 174 struct cam_periph *xpt_periph;
 175
 176 static periph_init_t xpt_periph_init;
 177
 178 static struct periph_driver xpt_driver =
 179 {
 180         xpt_periph_init, "xpt",
 181         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 182         CAM_PERIPH_DRV_EARLY
 183 };
 184
 185 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 186
 187 static d_open_t xptopen;
 188 static d_close_t xptclose;
 189 static d_ioctl_t xptioctl;
 190 static d_ioctl_t xptdoioctl;
 191
 192 static struct cdevsw xpt_cdevsw = {
 193         .d_version =    D_VERSION,
 194         .d_flags =      0,
 195         .d_open =       xptopen,
 196         .d_close =      xptclose,
 197         .d_ioctl =      xptioctl,
 198         .d_name =       "xpt",
 199 };
 200
 201 /* Storage for debugging datastructures */
 202 struct cam_path *cam_dpath;
 203 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 204 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 205         &cam_dflags, 0, "Enabled debug flags");
 206 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 207 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 208         &cam_debug_delay, 0, "Delay in us after each debug message");
 209
 210 /* Our boot-time initialization hook */
 211 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 212
 213 static moduledata_t cam_moduledata = {
 214         "cam",
 215         cam_module_event_handler,
 216         NULL
 217 };
 218
 219 static int      xpt_init(void *);
 220
 221 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 222 MODULE_VERSION(cam, 1);
 223
 224
 225 static void             xpt_async_bcast(struct async_list *async_head,
 226                                         u_int32_t async_code,
 227                                         struct cam_path *path,
 228                                         void *async_arg);
 229 static path_id_t xptnextfreepathid(void);
 230 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 231 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 232 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 233 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 234 static void      xpt_run_allocq_task(void *context, int pending);
 235 static void      xpt_run_devq(struct cam_devq *devq);
 236 static timeout_t xpt_release_devq_timeout;
 237 static void      xpt_release_simq_timeout(void *arg) __unused;
 238 static void      xpt_acquire_bus(struct cam_eb *bus);
 239 static void      xpt_release_bus(struct cam_eb *bus);
 240 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 241 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 242                     int run_queue);
 243 static struct cam_et*
 244                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 245 static void      xpt_acquire_target(struct cam_et *target);
 246 static void      xpt_release_target(struct cam_et *target);
 247 static struct cam_eb*
 248                  xpt_find_bus(path_id_t path_id);
 249 static struct cam_et*
 250                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 251 static struct cam_ed*
 252                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 253 static void      xpt_config(void *arg);
 254 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 255                                  u_int32_t new_priority);
 256 static xpt_devicefunc_t xptpassannouncefunc;
 257 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 258 static void      xptpoll(struct cam_sim *sim);
 259 static void      camisr_runqueue(void);
 260 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 261 static void      xpt_done_td(void *);
 262 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 263                                     u_int num_patterns, struct cam_eb *bus);
 264 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 265                                        u_int num_patterns,
 266                                        struct cam_ed *device);
 267 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 268                                        u_int num_patterns,
 269                                        struct cam_periph *periph);
 270 static xpt_busfunc_t    xptedtbusfunc;
 271 static xpt_targetfunc_t xptedttargetfunc;
 272 static xpt_devicefunc_t xptedtdevicefunc;
 273 static xpt_periphfunc_t xptedtperiphfunc;
 274 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 275 static xpt_periphfunc_t xptplistperiphfunc;
 276 static int              xptedtmatch(struct ccb_dev_match *cdm);
 277 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 278 static int              xptbustraverse(struct cam_eb *start_bus,
 279                                        xpt_busfunc_t *tr_func, void *arg);
 280 static int              xpttargettraverse(struct cam_eb *bus,
 281                                           struct cam_et *start_target,
 282                                           xpt_targetfunc_t *tr_func, void *arg);
 283 static int              xptdevicetraverse(struct cam_et *target,
 284                                           struct cam_ed *start_device,
 285                                           xpt_devicefunc_t *tr_func, void *arg);
 286 static int              xptperiphtraverse(struct cam_ed *device,
 287                                           struct cam_periph *start_periph,
 288                                           xpt_periphfunc_t *tr_func, void *arg);
 289 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 290                                         xpt_pdrvfunc_t *tr_func, void *arg);
 291 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 292                                             struct cam_periph *start_periph,
 293                                             xpt_periphfunc_t *tr_func,
 294                                             void *arg);
 295 static xpt_busfunc_t    xptdefbusfunc;
 296 static xpt_targetfunc_t xptdeftargetfunc;
 297 static xpt_devicefunc_t xptdefdevicefunc;
 298 static xpt_periphfunc_t xptdefperiphfunc;
 299 static void             xpt_finishconfig_task(void *context, int pending);
 300 static void             xpt_dev_async_default(u_int32_t async_code,
 301                                               struct cam_eb *bus,
 302                                               struct cam_et *target,
 303                                               struct cam_ed *device,
 304                                               void *async_arg);
 305 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 306                                                  struct cam_et *target,
 307                                                  lun_id_t lun_id);
 308 static xpt_devicefunc_t xptsetasyncfunc;
 309 static xpt_busfunc_t    xptsetasyncbusfunc;
 310 static cam_status       xptregister(struct cam_periph *periph,
 311                                     void *arg);
 312 static __inline int device_is_queued(struct cam_ed *device);
 313
 314 static __inline int
 315 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 316 {
 317         int     retval;
 318
 319         mtx_assert(&devq->send_mtx, MA_OWNED);
 320         if ((dev->ccbq.queue.entries > 0) &&
 321             (dev->ccbq.dev_openings > 0) &&
 322             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 323                 /*
 324                  * The priority of a device waiting for controller
 325                  * resources is that of the highest priority CCB
 326                  * enqueued.
 327                  */
 328                 retval =
 329                     xpt_schedule_dev(&devq->send_queue,
 330                                      &dev->devq_entry,
 331                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 332         } else {
 333                 retval = 0;
 334         }
 335         return (retval);
 336 }
 337
 338 static __inline int
 339 device_is_queued(struct cam_ed *device)
 340 {
 341         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 342 }
 343
 344 static void
 345 xpt_periph_init()
 346 {
 347         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 348 }
 349
 350 static int
 351 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 352 {
 353
 354         /*
 355          * Only allow read-write access.
 356          */
 357         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 358                 return(EPERM);
 359
 360         /*
 361          * We don't allow nonblocking access.
 362          */
 363         if ((flags & O_NONBLOCK) != 0) {
 364                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 365                 return(ENODEV);
 366         }
 367
 368         return(0);
 369 }
 370
 371 static int
 372 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 373 {
 374
 375         return(0);
 376 }
 377
 378 /*
 379  * Don't automatically grab the xpt softc lock here even though this is going
 380  * through the xpt device.  The xpt device is really just a back door for
 381  * accessing other devices and SIMs, so the right thing to do is to grab
 382  * the appropriate SIM lock once the bus/SIM is located.
 383  */
 384 static int
 385 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 386 {
 387         int error;
 388
 389         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 390                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 391         }
 392         return (error);
 393 }
 394
 395 static int
 396 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 397 {
 398         int error;
 399
 400         error = 0;
 401
 402         switch(cmd) {
 403         /*
 404          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 405          * to accept CCB types that don't quite make sense to send through a
 406          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 407          * in the CAM spec.
 408          */
 409         case CAMIOCOMMAND: {
 410                 union ccb *ccb;
 411                 union ccb *inccb;
 412                 struct cam_eb *bus;
 413
 414                 inccb = (union ccb *)addr;
 415
 416                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 417                 if (bus == NULL)
 418                         return (EINVAL);
 419
 420                 switch (inccb->ccb_h.func_code) {
 421                 case XPT_SCAN_BUS:
 422                 case XPT_RESET_BUS:
 423                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 424                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 425                                 xpt_release_bus(bus);
 426                                 return (EINVAL);
 427                         }
 428                         break;
 429                 case XPT_SCAN_TGT:
 430                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 431                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 432                                 xpt_release_bus(bus);
 433                                 return (EINVAL);
 434                         }
 435                         break;
 436                 default:
 437                         break;
 438                 }
 439
 440                 switch(inccb->ccb_h.func_code) {
 441                 case XPT_SCAN_BUS:
 442                 case XPT_RESET_BUS:
 443                 case XPT_PATH_INQ:
 444                 case XPT_ENG_INQ:
 445                 case XPT_SCAN_LUN:
 446                 case XPT_SCAN_TGT:
 447
 448                         ccb = xpt_alloc_ccb();
 449
 450                         /*
 451                          * Create a path using the bus, target, and lun the
 452                          * user passed in.
 453                          */
 454                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 455                                             inccb->ccb_h.path_id,
 456                                             inccb->ccb_h.target_id,
 457                                             inccb->ccb_h.target_lun) !=
 458                                             CAM_REQ_CMP){
 459                                 error = EINVAL;
 460                                 xpt_free_ccb(ccb);
 461                                 break;
 462                         }
 463                         /* Ensure all of our fields are correct */
 464                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 465                                       inccb->ccb_h.pinfo.priority);
 466                         xpt_merge_ccb(ccb, inccb);
 467                         xpt_path_lock(ccb->ccb_h.path);
 468                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 469                         xpt_path_unlock(ccb->ccb_h.path);
 470                         bcopy(ccb, inccb, sizeof(union ccb));
 471                         xpt_free_path(ccb->ccb_h.path);
 472                         xpt_free_ccb(ccb);
 473                         break;
 474
 475                 case XPT_DEBUG: {
 476                         union ccb ccb;
 477
 478                         /*
 479                          * This is an immediate CCB, so it's okay to
 480                          * allocate it on the stack.
 481                          */
 482
 483                         /*
 484                          * Create a path using the bus, target, and lun the
 485                          * user passed in.
 486                          */
 487                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 488                                             inccb->ccb_h.path_id,
 489                                             inccb->ccb_h.target_id,
 490                                             inccb->ccb_h.target_lun) !=
 491                                             CAM_REQ_CMP){
 492                                 error = EINVAL;
 493                                 break;
 494                         }
 495                         /* Ensure all of our fields are correct */
 496                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 497                                       inccb->ccb_h.pinfo.priority);
 498                         xpt_merge_ccb(&ccb, inccb);
 499                         xpt_action(&ccb);
 500                         bcopy(&ccb, inccb, sizeof(union ccb));
 501                         xpt_free_path(ccb.ccb_h.path);
 502                         break;
 503
 504                 }
 505                 case XPT_DEV_MATCH: {
 506                         struct cam_periph_map_info mapinfo;
 507                         struct cam_path *old_path;
 508
 509                         /*
 510                          * We can't deal with physical addresses for this
 511                          * type of transaction.
 512                          */
 513                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 514                             CAM_DATA_VADDR) {
 515                                 error = EINVAL;
 516                                 break;
 517                         }
 518
 519                         /*
 520                          * Save this in case the caller had it set to
 521                          * something in particular.
 522                          */
 523                         old_path = inccb->ccb_h.path;
 524
 525                         /*
 526                          * We really don't need a path for the matching
 527                          * code.  The path is needed because of the
 528                          * debugging statements in xpt_action().  They
 529                          * assume that the CCB has a valid path.
 530                          */
 531                         inccb->ccb_h.path = xpt_periph->path;
 532
 533                         bzero(&mapinfo, sizeof(mapinfo));
 534
 535                         /*
 536                          * Map the pattern and match buffers into kernel
 537                          * virtual address space.
 538                          */
 539                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 540
 541                         if (error) {
 542                                 inccb->ccb_h.path = old_path;
 543                                 break;
 544                         }
 545
 546                         /*
 547                          * This is an immediate CCB, we can send it on directly.
 548                          */
 549                         xpt_action(inccb);
 550
 551                         /*
 552                          * Map the buffers back into user space.
 553                          */
 554                         cam_periph_unmapmem(inccb, &mapinfo);
 555
 556                         inccb->ccb_h.path = old_path;
 557
 558                         error = 0;
 559                         break;
 560                 }
 561                 default:
 562                         error = ENOTSUP;
 563                         break;
 564                 }
 565                 xpt_release_bus(bus);
 566                 break;
 567         }
 568         /*
 569          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 570          * with the periphal driver name and unit name filled in.  The other
 571          * fields don't really matter as input.  The passthrough driver name
 572          * ("pass"), and unit number are passed back in the ccb.  The current
 573          * device generation number, and the index into the device peripheral
 574          * driver list, and the status are also passed back.  Note that
 575          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 576          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 577          * (or rather should be) impossible for the device peripheral driver
 578          * list to change since we look at the whole thing in one pass, and
 579          * we do it with lock protection.
 580          *
 581          */
 582         case CAMGETPASSTHRU: {
 583                 union ccb *ccb;
 584                 struct cam_periph *periph;
 585                 struct periph_driver **p_drv;
 586                 char   *name;
 587                 u_int unit;
 588                 int base_periph_found;
 589
 590                 ccb = (union ccb *)addr;
 591                 unit = ccb->cgdl.unit_number;
 592                 name = ccb->cgdl.periph_name;
 593                 base_periph_found = 0;
 594
 595                 /*
 596                  * Sanity check -- make sure we don't get a null peripheral
 597                  * driver name.
 598                  */
 599                 if (*ccb->cgdl.periph_name == '\0') {
 600                         error = EINVAL;
 601                         break;
 602                 }
 603
 604                 /* Keep the list from changing while we traverse it */
 605                 xpt_lock_buses();
 606
 607                 /* first find our driver in the list of drivers */
 608                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 609                         if (strcmp((*p_drv)->driver_name, name) == 0)
 610                                 break;
 611
 612                 if (*p_drv == NULL) {
 613                         xpt_unlock_buses();
 614                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 615                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 616                         *ccb->cgdl.periph_name = '\0';
 617                         ccb->cgdl.unit_number = 0;
 618                         error = ENOENT;
 619                         break;
 620                 }
 621
 622                 /*
 623                  * Run through every peripheral instance of this driver
 624                  * and check to see whether it matches the unit passed
 625                  * in by the user.  If it does, get out of the loops and
 626                  * find the passthrough driver associated with that
 627                  * peripheral driver.
 628                  */
 629                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 630                      periph = TAILQ_NEXT(periph, unit_links)) {
 631
 632                         if (periph->unit_number == unit)
 633                                 break;
 634                 }
 635                 /*
 636                  * If we found the peripheral driver that the user passed
 637                  * in, go through all of the peripheral drivers for that
 638                  * particular device and look for a passthrough driver.
 639                  */
 640                 if (periph != NULL) {
 641                         struct cam_ed *device;
 642                         int i;
 643
 644                         base_periph_found = 1;
 645                         device = periph->path->device;
 646                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 647                              periph != NULL;
 648                              periph = SLIST_NEXT(periph, periph_links), i++) {
 649                                 /*
 650                                  * Check to see whether we have a
 651                                  * passthrough device or not.
 652                                  */
 653                                 if (strcmp(periph->periph_name, "pass") == 0) {
 654                                         /*
 655                                          * Fill in the getdevlist fields.
 656                                          */
 657                                         strcpy(ccb->cgdl.periph_name,
 658                                                periph->periph_name);
 659                                         ccb->cgdl.unit_number =
 660                                                 periph->unit_number;
 661                                         if (SLIST_NEXT(periph, periph_links))
 662                                                 ccb->cgdl.status =
 663                                                         CAM_GDEVLIST_MORE_DEVS;
 664                                         else
 665                                                 ccb->cgdl.status =
 666                                                        CAM_GDEVLIST_LAST_DEVICE;
 667                                         ccb->cgdl.generation =
 668                                                 device->generation;
 669                                         ccb->cgdl.index = i;
 670                                         /*
 671                                          * Fill in some CCB header fields
 672                                          * that the user may want.
 673                                          */
 674                                         ccb->ccb_h.path_id =
 675                                                 periph->path->bus->path_id;
 676                                         ccb->ccb_h.target_id =
 677                                                 periph->path->target->target_id;
 678                                         ccb->ccb_h.target_lun =
 679                                                 periph->path->device->lun_id;
 680                                         ccb->ccb_h.status = CAM_REQ_CMP;
 681                                         break;
 682                                 }
 683                         }
 684                 }
 685
 686                 /*
 687                  * If the periph is null here, one of two things has
 688                  * happened.  The first possibility is that we couldn't
 689                  * find the unit number of the particular peripheral driver
 690                  * that the user is asking about.  e.g. the user asks for
 691                  * the passthrough driver for "da11".  We find the list of
 692                  * "da" peripherals all right, but there is no unit 11.
 693                  * The other possibility is that we went through the list
 694                  * of peripheral drivers attached to the device structure,
 695                  * but didn't find one with the name "pass".  Either way,
 696                  * we return ENOENT, since we couldn't find something.
 697                  */
 698                 if (periph == NULL) {
 699                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 700                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 701                         *ccb->cgdl.periph_name = '\0';
 702                         ccb->cgdl.unit_number = 0;
 703                         error = ENOENT;
 704                         /*
 705                          * It is unfortunate that this is even necessary,
 706                          * but there are many, many clueless users out there.
 707                          * If this is true, the user is looking for the
 708                          * passthrough driver, but doesn't have one in his
 709                          * kernel.
 710                          */
 711                         if (base_periph_found == 1) {
 712                                 printf("xptioctl: pass driver is not in the "
 713                                        "kernel\n");
 714                                 printf("xptioctl: put \"device pass\" in "
 715                                        "your kernel config file\n");
 716                         }
 717                 }
 718                 xpt_unlock_buses();
 719                 break;
 720                 }
 721         default:
 722                 error = ENOTTY;
 723                 break;
 724         }
 725
 726         return(error);
 727 }
 728
 729 static int
 730 cam_module_event_handler(module_t mod, int what, void *arg)
 731 {
 732         int error;
 733
 734         switch (what) {
 735         case MOD_LOAD:
 736                 if ((error = xpt_init(NULL)) != 0)
 737                         return (error);
 738                 break;
 739         case MOD_UNLOAD:
 740                 return EBUSY;
 741         default:
 742                 return EOPNOTSUPP;
 743         }
 744
 745         return 0;
 746 }
 747
 748 static void
 749 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 750 {
 751
 752         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 753                 xpt_free_path(done_ccb->ccb_h.path);
 754                 xpt_free_ccb(done_ccb);
 755         } else {
 756                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 757                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 758         }
 759         xpt_release_boot();
 760 }
 761
 762 /* thread to handle bus rescans */
 763 static void
 764 xpt_scanner_thread(void *dummy)
 765 {
 766         union ccb       *ccb;
 767         struct cam_path  path;
 768
 769         xpt_lock_buses();
 770         for (;;) {
 771                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 772                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 773                                "-", 0);
 774                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 775                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 776                         xpt_unlock_buses();
 777
 778                         /*
 779                          * Since lock can be dropped inside and path freed
 780                          * by completion callback even before return here,
 781                          * take our own path copy for reference.
 782                          */
 783                         xpt_copy_path(&path, ccb->ccb_h.path);
 784                         xpt_path_lock(&path);
 785                         xpt_action(ccb);
 786                         xpt_path_unlock(&path);
 787                         xpt_release_path(&path);
 788
 789                         xpt_lock_buses();
 790                 }
 791         }
 792 }
 793
 794 void
 795 xpt_rescan(union ccb *ccb)
 796 {
 797         struct ccb_hdr *hdr;
 798
 799         /* Prepare request */
 800         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 801             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 802                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 803         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 804             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 805                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 806         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 807             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 808                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 809         else {
 810                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 811                 xpt_free_path(ccb->ccb_h.path);
 812                 xpt_free_ccb(ccb);
 813                 return;
 814         }
 815         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 816         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 817         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 818         /* Don't make duplicate entries for the same paths. */
 819         xpt_lock_buses();
 820         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 821                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 822                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 823                                 wakeup(&xsoftc.ccb_scanq);
 824                                 xpt_unlock_buses();
 825                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 826                                 xpt_free_path(ccb->ccb_h.path);
 827                                 xpt_free_ccb(ccb);
 828                                 return;
 829                         }
 830                 }
 831         }
 832         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 833         xsoftc.buses_to_config++;
 834         wakeup(&xsoftc.ccb_scanq);
 835         xpt_unlock_buses();
 836 }
 837
 838 /* Functions accessed by the peripheral drivers */
 839 static int
 840 xpt_init(void *dummy)
 841 {
 842         struct cam_sim *xpt_sim;
 843         struct cam_path *path;
 844         struct cam_devq *devq;
 845         cam_status status;
 846         int error, i;
 847
 848         TAILQ_INIT(&xsoftc.xpt_busses);
 849         TAILQ_INIT(&xsoftc.ccb_scanq);
 850         STAILQ_INIT(&xsoftc.highpowerq);
 851         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 852
 853         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 854         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 855         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 856             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 857
 858 #ifdef CAM_BOOT_DELAY
 859         /*
 860          * Override this value at compile time to assist our users
 861          * who don't use loader to boot a kernel.
 862          */
 863         xsoftc.boot_delay = CAM_BOOT_DELAY;
 864 #endif
 865         /*
 866          * The xpt layer is, itself, the equivelent of a SIM.
 867          * Allow 16 ccbs in the ccb pool for it.  This should
 868          * give decent parallelism when we probe busses and
 869          * perform other XPT functions.
 870          */
 871         devq = cam_simq_alloc(16);
 872         xpt_sim = cam_sim_alloc(xptaction,
 873                                 xptpoll,
 874                                 "xpt",
 875                                 /*softc*/NULL,
 876                                 /*unit*/0,
 877                                 /*mtx*/&xsoftc.xpt_lock,
 878                                 /*max_dev_transactions*/0,
 879                                 /*max_tagged_dev_transactions*/0,
 880                                 devq);
 881         if (xpt_sim == NULL)
 882                 return (ENOMEM);
 883
 884         mtx_lock(&xsoftc.xpt_lock);
 885         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 886                 mtx_unlock(&xsoftc.xpt_lock);
 887                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 888                        " failing attach\n", status);
 889                 return (EINVAL);
 890         }
 891         mtx_unlock(&xsoftc.xpt_lock);
 892
 893         /*
 894          * Looking at the XPT from the SIM layer, the XPT is
 895          * the equivelent of a peripheral driver.  Allocate
 896          * a peripheral driver entry for us.
 897          */
 898         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 899                                       CAM_TARGET_WILDCARD,
 900                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 901                 printf("xpt_init: xpt_create_path failed with status %#x,"
 902                        " failing attach\n", status);
 903                 return (EINVAL);
 904         }
 905         xpt_path_lock(path);
 906         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 907                          path, NULL, 0, xpt_sim);
 908         xpt_path_unlock(path);
 909         xpt_free_path(path);
 910
 911         if (cam_num_doneqs < 1)
 912                 cam_num_doneqs = 1 + mp_ncpus / 6;
 913         else if (cam_num_doneqs > MAXCPU)
 914                 cam_num_doneqs = MAXCPU;
 915         for (i = 0; i < cam_num_doneqs; i++) {
 916                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 917                     MTX_DEF);
 918                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 919                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 920                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 921                 if (error != 0) {
 922                         cam_num_doneqs = i;
 923                         break;
 924                 }
 925         }
 926         if (cam_num_doneqs < 1) {
 927                 printf("xpt_init: Cannot init completion queues "
 928                        "- failing attach\n");
 929                 return (ENOMEM);
 930         }
 931         /*
 932          * Register a callback for when interrupts are enabled.
 933          */
 934         xsoftc.xpt_config_hook =
 935             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 936                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 937         if (xsoftc.xpt_config_hook == NULL) {
 938                 printf("xpt_init: Cannot malloc config hook "
 939                        "- failing attach\n");
 940                 return (ENOMEM);
 941         }
 942         xsoftc.xpt_config_hook->ich_func = xpt_config;
 943         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 944                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 945                 printf("xpt_init: config_intrhook_establish failed "
 946                        "- failing attach\n");
 947         }
 948
 949         return (0);
 950 }
 951
 952 static cam_status
 953 xptregister(struct cam_periph *periph, void *arg)
 954 {
 955         struct cam_sim *xpt_sim;
 956
 957         if (periph == NULL) {
 958                 printf("xptregister: periph was NULL!!\n");
 959                 return(CAM_REQ_CMP_ERR);
 960         }
 961
 962         xpt_sim = (struct cam_sim *)arg;
 963         xpt_sim->softc = periph;
 964         xpt_periph = periph;
 965         periph->softc = NULL;
 966
 967         return(CAM_REQ_CMP);
 968 }
 969
 970 int32_t
 971 xpt_add_periph(struct cam_periph *periph)
 972 {
 973         struct cam_ed *device;
 974         int32_t  status;
 975
 976         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
 977         device = periph->path->device;
 978         status = CAM_REQ_CMP;
 979         if (device != NULL) {
 980                 mtx_lock(&device->target->bus->eb_mtx);
 981                 device->generation++;
 982                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
 983                 mtx_unlock(&device->target->bus->eb_mtx);
 984                 atomic_add_32(&xsoftc.xpt_generation, 1);
 985         }
 986
 987         return (status);
 988 }
 989
 990 void
 991 xpt_remove_periph(struct cam_periph *periph)
 992 {
 993         struct cam_ed *device;
 994
 995         device = periph->path->device;
 996         if (device != NULL) {
 997                 mtx_lock(&device->target->bus->eb_mtx);
 998                 device->generation++;
 999                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1000                 mtx_unlock(&device->target->bus->eb_mtx);
1001                 atomic_add_32(&xsoftc.xpt_generation, 1);
1002         }
1003 }
1004
1005
1006 void
1007 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1008 {
1009         struct  cam_path *path = periph->path;
1010
1011         cam_periph_assert(periph, MA_OWNED);
1012         periph->flags |= CAM_PERIPH_ANNOUNCED;
1013
1014         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1015                periph->periph_name, periph->unit_number,
1016                path->bus->sim->sim_name,
1017                path->bus->sim->unit_number,
1018                path->bus->sim->bus_id,
1019                path->bus->path_id,
1020                path->target->target_id,
1021                (uintmax_t)path->device->lun_id);
1022         printf("%s%d: ", periph->periph_name, periph->unit_number);
1023         if (path->device->protocol == PROTO_SCSI)
1024                 scsi_print_inquiry(&path->device->inq_data);
1025         else if (path->device->protocol == PROTO_ATA ||
1026             path->device->protocol == PROTO_SATAPM)
1027                 ata_print_ident(&path->device->ident_data);
1028         else if (path->device->protocol == PROTO_SEMB)
1029                 semb_print_ident(
1030                     (struct sep_identify_data *)&path->device->ident_data);
1031         else
1032                 printf("Unknown protocol device\n");
1033         if (path->device->serial_num_len > 0) {
1034                 /* Don't wrap the screen  - print only the first 60 chars */
1035                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1036                        periph->unit_number, path->device->serial_num);
1037         }
1038         /* Announce transport details. */
1039         (*(path->bus->xport->announce))(periph);
1040         /* Announce command queueing. */
1041         if (path->device->inq_flags & SID_CmdQue
1042          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1043                 printf("%s%d: Command Queueing enabled\n",
1044                        periph->periph_name, periph->unit_number);
1045         }
1046         /* Announce caller's details if they've passed in. */
1047         if (announce_string != NULL)
1048                 printf("%s%d: %s\n", periph->periph_name,
1049                        periph->unit_number, announce_string);
1050 }
1051
1052 void
1053 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1054 {
1055         if (quirks != 0) {
1056                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1057                     periph->unit_number, quirks, bit_string);
1058         }
1059 }
1060
1061 void
1062 xpt_denounce_periph(struct cam_periph *periph)
1063 {
1064         struct  cam_path *path = periph->path;
1065
1066         cam_periph_assert(periph, MA_OWNED);
1067         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1068                periph->periph_name, periph->unit_number,
1069                path->bus->sim->sim_name,
1070                path->bus->sim->unit_number,
1071                path->bus->sim->bus_id,
1072                path->bus->path_id,
1073                path->target->target_id,
1074                (uintmax_t)path->device->lun_id);
1075         printf("%s%d: ", periph->periph_name, periph->unit_number);
1076         if (path->device->protocol == PROTO_SCSI)
1077                 scsi_print_inquiry_short(&path->device->inq_data);
1078         else if (path->device->protocol == PROTO_ATA ||
1079             path->device->protocol == PROTO_SATAPM)
1080                 ata_print_ident_short(&path->device->ident_data);
1081         else if (path->device->protocol == PROTO_SEMB)
1082                 semb_print_ident_short(
1083                     (struct sep_identify_data *)&path->device->ident_data);
1084         else
1085                 printf("Unknown protocol device");
1086         if (path->device->serial_num_len > 0)
1087                 printf(" s/n %.60s", path->device->serial_num);
1088         printf(" detached\n");
1089 }
1090
1091
1092 int
1093 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1094 {
1095         int ret = -1, l;
1096         struct ccb_dev_advinfo cdai;
1097         struct scsi_vpd_id_descriptor *idd;
1098
1099         xpt_path_assert(path, MA_OWNED);
1100
1101         memset(&cdai, 0, sizeof(cdai));
1102         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1103         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1104         cdai.bufsiz = len;
1105
1106         if (!strcmp(attr, "GEOM::ident"))
1107                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1108         else if (!strcmp(attr, "GEOM::physpath"))
1109                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1110         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1111                  strcmp(attr, "GEOM::lunname") == 0) {
1112                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1113                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1114         } else
1115                 goto out;
1116
1117         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1118         if (cdai.buf == NULL) {
1119                 ret = ENOMEM;
1120                 goto out;
1121         }
1122         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1123         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1124                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1125         if (cdai.provsiz == 0)
1126                 goto out;
1127         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1128                 if (strcmp(attr, "GEOM::lunid") == 0) {
1129                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1130                             cdai.provsiz, scsi_devid_is_lun_naa);
1131                         if (idd == NULL)
1132                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1133                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1134                 } else
1135                         idd = NULL;
1136                 if (idd == NULL)
1137                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138                             cdai.provsiz, scsi_devid_is_lun_t10);
1139                 if (idd == NULL)
1140                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1141                             cdai.provsiz, scsi_devid_is_lun_name);
1142                 if (idd == NULL)
1143                         goto out;
1144                 ret = 0;
1145                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1146                         if (idd->length < len) {
1147                                 for (l = 0; l < idd->length; l++)
1148                                         buf[l] = idd->identifier[l] ?
1149                                             idd->identifier[l] : ' ';
1150                                 buf[l] = 0;
1151                         } else
1152                                 ret = EFAULT;
1153                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1154                         l = strnlen(idd->identifier, idd->length);
1155                         if (l < len) {
1156                                 bcopy(idd->identifier, buf, l);
1157                                 buf[l] = 0;
1158                         } else
1159                                 ret = EFAULT;
1160                 } else {
1161                         if (idd->length * 2 < len) {
1162                                 for (l = 0; l < idd->length; l++)
1163                                         sprintf(buf + l * 2, "%02x",
1164                                             idd->identifier[l]);
1165                         } else
1166                                 ret = EFAULT;
1167                 }
1168         } else {
1169                 ret = 0;
1170                 if (strlcpy(buf, cdai.buf, len) >= len)
1171                         ret = EFAULT;
1172         }
1173
1174 out:
1175         if (cdai.buf != NULL)
1176                 free(cdai.buf, M_CAMXPT);
1177         return ret;
1178 }
1179
1180 static dev_match_ret
1181 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1182             struct cam_eb *bus)
1183 {
1184         dev_match_ret retval;
1185         int i;
1186
1187         retval = DM_RET_NONE;
1188
1189         /*
1190          * If we aren't given something to match against, that's an error.
1191          */
1192         if (bus == NULL)
1193                 return(DM_RET_ERROR);
1194
1195         /*
1196          * If there are no match entries, then this bus matches no
1197          * matter what.
1198          */
1199         if ((patterns == NULL) || (num_patterns == 0))
1200                 return(DM_RET_DESCEND | DM_RET_COPY);
1201
1202         for (i = 0; i < num_patterns; i++) {
1203                 struct bus_match_pattern *cur_pattern;
1204
1205                 /*
1206                  * If the pattern in question isn't for a bus node, we
1207                  * aren't interested.  However, we do indicate to the
1208                  * calling routine that we should continue descending the
1209                  * tree, since the user wants to match against lower-level
1210                  * EDT elements.
1211                  */
1212                 if (patterns[i].type != DEV_MATCH_BUS) {
1213                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1214                                 retval |= DM_RET_DESCEND;
1215                         continue;
1216                 }
1217
1218                 cur_pattern = &patterns[i].pattern.bus_pattern;
1219
1220                 /*
1221                  * If they want to match any bus node, we give them any
1222                  * device node.
1223                  */
1224                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1225                         /* set the copy flag */
1226                         retval |= DM_RET_COPY;
1227
1228                         /*
1229                          * If we've already decided on an action, go ahead
1230                          * and return.
1231                          */
1232                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1233                                 return(retval);
1234                 }
1235
1236                 /*
1237                  * Not sure why someone would do this...
1238                  */
1239                 if (cur_pattern->flags == BUS_MATCH_NONE)
1240                         continue;
1241
1242                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1243                  && (cur_pattern->path_id != bus->path_id))
1244                         continue;
1245
1246                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1247                  && (cur_pattern->bus_id != bus->sim->bus_id))
1248                         continue;
1249
1250                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1251                  && (cur_pattern->unit_number != bus->sim->unit_number))
1252                         continue;
1253
1254                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1255                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1256                              DEV_IDLEN) != 0))
1257                         continue;
1258
1259                 /*
1260                  * If we get to this point, the user definitely wants
1261                  * information on this bus.  So tell the caller to copy the
1262                  * data out.
1263                  */
1264                 retval |= DM_RET_COPY;
1265
1266                 /*
1267                  * If the return action has been set to descend, then we
1268                  * know that we've already seen a non-bus matching
1269                  * expression, therefore we need to further descend the tree.
1270                  * This won't change by continuing around the loop, so we
1271                  * go ahead and return.  If we haven't seen a non-bus
1272                  * matching expression, we keep going around the loop until
1273                  * we exhaust the matching expressions.  We'll set the stop
1274                  * flag once we fall out of the loop.
1275                  */
1276                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1277                         return(retval);
1278         }
1279
1280         /*
1281          * If the return action hasn't been set to descend yet, that means
1282          * we haven't seen anything other than bus matching patterns.  So
1283          * tell the caller to stop descending the tree -- the user doesn't
1284          * want to match against lower level tree elements.
1285          */
1286         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1287                 retval |= DM_RET_STOP;
1288
1289         return(retval);
1290 }
1291
1292 static dev_match_ret
1293 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1294                struct cam_ed *device)
1295 {
1296         dev_match_ret retval;
1297         int i;
1298
1299         retval = DM_RET_NONE;
1300
1301         /*
1302          * If we aren't given something to match against, that's an error.
1303          */
1304         if (device == NULL)
1305                 return(DM_RET_ERROR);
1306
1307         /*
1308          * If there are no match entries, then this device matches no
1309          * matter what.
1310          */
1311         if ((patterns == NULL) || (num_patterns == 0))
1312                 return(DM_RET_DESCEND | DM_RET_COPY);
1313
1314         for (i = 0; i < num_patterns; i++) {
1315                 struct device_match_pattern *cur_pattern;
1316                 struct scsi_vpd_device_id *device_id_page;
1317
1318                 /*
1319                  * If the pattern in question isn't for a device node, we
1320                  * aren't interested.
1321                  */
1322                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1323                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1324                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1325                                 retval |= DM_RET_DESCEND;
1326                         continue;
1327                 }
1328
1329                 cur_pattern = &patterns[i].pattern.device_pattern;
1330
1331                 /* Error out if mutually exclusive options are specified. */
1332                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1333                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1334                         return(DM_RET_ERROR);
1335
1336                 /*
1337                  * If they want to match any device node, we give them any
1338                  * device node.
1339                  */
1340                 if (cur_pattern->flags == DEV_MATCH_ANY)
1341                         goto copy_dev_node;
1342
1343                 /*
1344                  * Not sure why someone would do this...
1345                  */
1346                 if (cur_pattern->flags == DEV_MATCH_NONE)
1347                         continue;
1348
1349                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1350                  && (cur_pattern->path_id != device->target->bus->path_id))
1351                         continue;
1352
1353                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1354                  && (cur_pattern->target_id != device->target->target_id))
1355                         continue;
1356
1357                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1358                  && (cur_pattern->target_lun != device->lun_id))
1359                         continue;
1360
1361                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1362                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1363                                     (caddr_t)&cur_pattern->data.inq_pat,
1364                                     1, sizeof(cur_pattern->data.inq_pat),
1365                                     scsi_static_inquiry_match) == NULL))
1366                         continue;
1367
1368                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1369                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1370                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1371                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1372                                       device->device_id_len
1373                                     - SVPD_DEVICE_ID_HDR_LEN,
1374                                       cur_pattern->data.devid_pat.id,
1375                                       cur_pattern->data.devid_pat.id_len) != 0))
1376                         continue;
1377
1378 copy_dev_node:
1379                 /*
1380                  * If we get to this point, the user definitely wants
1381                  * information on this device.  So tell the caller to copy
1382                  * the data out.
1383                  */
1384                 retval |= DM_RET_COPY;
1385
1386                 /*
1387                  * If the return action has been set to descend, then we
1388                  * know that we've already seen a peripheral matching
1389                  * expression, therefore we need to further descend the tree.
1390                  * This won't change by continuing around the loop, so we
1391                  * go ahead and return.  If we haven't seen a peripheral
1392                  * matching expression, we keep going around the loop until
1393                  * we exhaust the matching expressions.  We'll set the stop
1394                  * flag once we fall out of the loop.
1395                  */
1396                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1397                         return(retval);
1398         }
1399
1400         /*
1401          * If the return action hasn't been set to descend yet, that means
1402          * we haven't seen any peripheral matching patterns.  So tell the
1403          * caller to stop descending the tree -- the user doesn't want to
1404          * match against lower level tree elements.
1405          */
1406         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1407                 retval |= DM_RET_STOP;
1408
1409         return(retval);
1410 }
1411
1412 /*
1413  * Match a single peripheral against any number of match patterns.
1414  */
1415 static dev_match_ret
1416 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1417                struct cam_periph *periph)
1418 {
1419         dev_match_ret retval;
1420         int i;
1421
1422         /*
1423          * If we aren't given something to match against, that's an error.
1424          */
1425         if (periph == NULL)
1426                 return(DM_RET_ERROR);
1427
1428         /*
1429          * If there are no match entries, then this peripheral matches no
1430          * matter what.
1431          */
1432         if ((patterns == NULL) || (num_patterns == 0))
1433                 return(DM_RET_STOP | DM_RET_COPY);
1434
1435         /*
1436          * There aren't any nodes below a peripheral node, so there's no
1437          * reason to descend the tree any further.
1438          */
1439         retval = DM_RET_STOP;
1440
1441         for (i = 0; i < num_patterns; i++) {
1442                 struct periph_match_pattern *cur_pattern;
1443
1444                 /*
1445                  * If the pattern in question isn't for a peripheral, we
1446                  * aren't interested.
1447                  */
1448                 if (patterns[i].type != DEV_MATCH_PERIPH)
1449                         continue;
1450
1451                 cur_pattern = &patterns[i].pattern.periph_pattern;
1452
1453                 /*
1454                  * If they want to match on anything, then we will do so.
1455                  */
1456                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1457                         /* set the copy flag */
1458                         retval |= DM_RET_COPY;
1459
1460                         /*
1461                          * We've already set the return action to stop,
1462                          * since there are no nodes below peripherals in
1463                          * the tree.
1464                          */
1465                         return(retval);
1466                 }
1467
1468                 /*
1469                  * Not sure why someone would do this...
1470                  */
1471                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1472                         continue;
1473
1474                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1475                  && (cur_pattern->path_id != periph->path->bus->path_id))
1476                         continue;
1477
1478                 /*
1479                  * For the target and lun id's, we have to make sure the
1480                  * target and lun pointers aren't NULL.  The xpt peripheral
1481                  * has a wildcard target and device.
1482                  */
1483                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1484                  && ((periph->path->target == NULL)
1485                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1486                         continue;
1487
1488                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1489                  && ((periph->path->device == NULL)
1490                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1491                         continue;
1492
1493                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1494                  && (cur_pattern->unit_number != periph->unit_number))
1495                         continue;
1496
1497                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1498                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1499                              DEV_IDLEN) != 0))
1500                         continue;
1501
1502                 /*
1503                  * If we get to this point, the user definitely wants
1504                  * information on this peripheral.  So tell the caller to
1505                  * copy the data out.
1506                  */
1507                 retval |= DM_RET_COPY;
1508
1509                 /*
1510                  * The return action has already been set to stop, since
1511                  * peripherals don't have any nodes below them in the EDT.
1512                  */
1513                 return(retval);
1514         }
1515
1516         /*
1517          * If we get to this point, the peripheral that was passed in
1518          * doesn't match any of the patterns.
1519          */
1520         return(retval);
1521 }
1522
1523 static int
1524 xptedtbusfunc(struct cam_eb *bus, void *arg)
1525 {
1526         struct ccb_dev_match *cdm;
1527         struct cam_et *target;
1528         dev_match_ret retval;
1529
1530         cdm = (struct ccb_dev_match *)arg;
1531
1532         /*
1533          * If our position is for something deeper in the tree, that means
1534          * that we've already seen this node.  So, we keep going down.
1535          */
1536         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1537          && (cdm->pos.cookie.bus == bus)
1538          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1539          && (cdm->pos.cookie.target != NULL))
1540                 retval = DM_RET_DESCEND;
1541         else
1542                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1543
1544         /*
1545          * If we got an error, bail out of the search.
1546          */
1547         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1548                 cdm->status = CAM_DEV_MATCH_ERROR;
1549                 return(0);
1550         }
1551
1552         /*
1553          * If the copy flag is set, copy this bus out.
1554          */
1555         if (retval & DM_RET_COPY) {
1556                 int spaceleft, j;
1557
1558                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1559                         sizeof(struct dev_match_result));
1560
1561                 /*
1562                  * If we don't have enough space to put in another
1563                  * match result, save our position and tell the
1564                  * user there are more devices to check.
1565                  */
1566                 if (spaceleft < sizeof(struct dev_match_result)) {
1567                         bzero(&cdm->pos, sizeof(cdm->pos));
1568                         cdm->pos.position_type =
1569                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1570
1571                         cdm->pos.cookie.bus = bus;
1572                         cdm->pos.generations[CAM_BUS_GENERATION]=
1573                                 xsoftc.bus_generation;
1574                         cdm->status = CAM_DEV_MATCH_MORE;
1575                         return(0);
1576                 }
1577                 j = cdm->num_matches;
1578                 cdm->num_matches++;
1579                 cdm->matches[j].type = DEV_MATCH_BUS;
1580                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1581                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1582                 cdm->matches[j].result.bus_result.unit_number =
1583                         bus->sim->unit_number;
1584                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1585                         bus->sim->sim_name, DEV_IDLEN);
1586         }
1587
1588         /*
1589          * If the user is only interested in busses, there's no
1590          * reason to descend to the next level in the tree.
1591          */
1592         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1593                 return(1);
1594
1595         /*
1596          * If there is a target generation recorded, check it to
1597          * make sure the target list hasn't changed.
1598          */
1599         mtx_lock(&bus->eb_mtx);
1600         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1601          && (cdm->pos.cookie.bus == bus)
1602          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1603          && (cdm->pos.cookie.target != NULL)) {
1604                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1605                     bus->generation)) {
1606                         mtx_unlock(&bus->eb_mtx);
1607                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1608                         return (0);
1609                 }
1610                 target = (struct cam_et *)cdm->pos.cookie.target;
1611                 target->refcount++;
1612         } else
1613                 target = NULL;
1614         mtx_unlock(&bus->eb_mtx);
1615
1616         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1617 }
1618
1619 static int
1620 xptedttargetfunc(struct cam_et *target, void *arg)
1621 {
1622         struct ccb_dev_match *cdm;
1623         struct cam_eb *bus;
1624         struct cam_ed *device;
1625
1626         cdm = (struct ccb_dev_match *)arg;
1627         bus = target->bus;
1628
1629         /*
1630          * If there is a device list generation recorded, check it to
1631          * make sure the device list hasn't changed.
1632          */
1633         mtx_lock(&bus->eb_mtx);
1634         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1635          && (cdm->pos.cookie.bus == bus)
1636          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1637          && (cdm->pos.cookie.target == target)
1638          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1639          && (cdm->pos.cookie.device != NULL)) {
1640                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1641                     target->generation) {
1642                         mtx_unlock(&bus->eb_mtx);
1643                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1644                         return(0);
1645                 }
1646                 device = (struct cam_ed *)cdm->pos.cookie.device;
1647                 device->refcount++;
1648         } else
1649                 device = NULL;
1650         mtx_unlock(&bus->eb_mtx);
1651
1652         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1653 }
1654
1655 static int
1656 xptedtdevicefunc(struct cam_ed *device, void *arg)
1657 {
1658         struct cam_eb *bus;
1659         struct cam_periph *periph;
1660         struct ccb_dev_match *cdm;
1661         dev_match_ret retval;
1662
1663         cdm = (struct ccb_dev_match *)arg;
1664         bus = device->target->bus;
1665
1666         /*
1667          * If our position is for something deeper in the tree, that means
1668          * that we've already seen this node.  So, we keep going down.
1669          */
1670         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1671          && (cdm->pos.cookie.device == device)
1672          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1673          && (cdm->pos.cookie.periph != NULL))
1674                 retval = DM_RET_DESCEND;
1675         else
1676                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1677                                         device);
1678
1679         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1680                 cdm->status = CAM_DEV_MATCH_ERROR;
1681                 return(0);
1682         }
1683
1684         /*
1685          * If the copy flag is set, copy this device out.
1686          */
1687         if (retval & DM_RET_COPY) {
1688                 int spaceleft, j;
1689
1690                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1691                         sizeof(struct dev_match_result));
1692
1693                 /*
1694                  * If we don't have enough space to put in another
1695                  * match result, save our position and tell the
1696                  * user there are more devices to check.
1697                  */
1698                 if (spaceleft < sizeof(struct dev_match_result)) {
1699                         bzero(&cdm->pos, sizeof(cdm->pos));
1700                         cdm->pos.position_type =
1701                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1702                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1703
1704                         cdm->pos.cookie.bus = device->target->bus;
1705                         cdm->pos.generations[CAM_BUS_GENERATION]=
1706                                 xsoftc.bus_generation;
1707                         cdm->pos.cookie.target = device->target;
1708                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1709                                 device->target->bus->generation;
1710                         cdm->pos.cookie.device = device;
1711                         cdm->pos.generations[CAM_DEV_GENERATION] =
1712                                 device->target->generation;
1713                         cdm->status = CAM_DEV_MATCH_MORE;
1714                         return(0);
1715                 }
1716                 j = cdm->num_matches;
1717                 cdm->num_matches++;
1718                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1719                 cdm->matches[j].result.device_result.path_id =
1720                         device->target->bus->path_id;
1721                 cdm->matches[j].result.device_result.target_id =
1722                         device->target->target_id;
1723                 cdm->matches[j].result.device_result.target_lun =
1724                         device->lun_id;
1725                 cdm->matches[j].result.device_result.protocol =
1726                         device->protocol;
1727                 bcopy(&device->inq_data,
1728                       &cdm->matches[j].result.device_result.inq_data,
1729                       sizeof(struct scsi_inquiry_data));
1730                 bcopy(&device->ident_data,
1731                       &cdm->matches[j].result.device_result.ident_data,
1732                       sizeof(struct ata_params));
1733
1734                 /* Let the user know whether this device is unconfigured */
1735                 if (device->flags & CAM_DEV_UNCONFIGURED)
1736                         cdm->matches[j].result.device_result.flags =
1737                                 DEV_RESULT_UNCONFIGURED;
1738                 else
1739                         cdm->matches[j].result.device_result.flags =
1740                                 DEV_RESULT_NOFLAG;
1741         }
1742
1743         /*
1744          * If the user isn't interested in peripherals, don't descend
1745          * the tree any further.
1746          */
1747         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1748                 return(1);
1749
1750         /*
1751          * If there is a peripheral list generation recorded, make sure
1752          * it hasn't changed.
1753          */
1754         xpt_lock_buses();
1755         mtx_lock(&bus->eb_mtx);
1756         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1757          && (cdm->pos.cookie.bus == bus)
1758          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1759          && (cdm->pos.cookie.target == device->target)
1760          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1761          && (cdm->pos.cookie.device == device)
1762          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1763          && (cdm->pos.cookie.periph != NULL)) {
1764                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1765                     device->generation) {
1766                         mtx_unlock(&bus->eb_mtx);
1767                         xpt_unlock_buses();
1768                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1769                         return(0);
1770                 }
1771                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1772                 periph->refcount++;
1773         } else
1774                 periph = NULL;
1775         mtx_unlock(&bus->eb_mtx);
1776         xpt_unlock_buses();
1777
1778         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1779 }
1780
1781 static int
1782 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1783 {
1784         struct ccb_dev_match *cdm;
1785         dev_match_ret retval;
1786
1787         cdm = (struct ccb_dev_match *)arg;
1788
1789         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1790
1791         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1792                 cdm->status = CAM_DEV_MATCH_ERROR;
1793                 return(0);
1794         }
1795
1796         /*
1797          * If the copy flag is set, copy this peripheral out.
1798          */
1799         if (retval & DM_RET_COPY) {
1800                 int spaceleft, j;
1801
1802                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1803                         sizeof(struct dev_match_result));
1804
1805                 /*
1806                  * If we don't have enough space to put in another
1807                  * match result, save our position and tell the
1808                  * user there are more devices to check.
1809                  */
1810                 if (spaceleft < sizeof(struct dev_match_result)) {
1811                         bzero(&cdm->pos, sizeof(cdm->pos));
1812                         cdm->pos.position_type =
1813                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1814                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1815                                 CAM_DEV_POS_PERIPH;
1816
1817                         cdm->pos.cookie.bus = periph->path->bus;
1818                         cdm->pos.generations[CAM_BUS_GENERATION]=
1819                                 xsoftc.bus_generation;
1820                         cdm->pos.cookie.target = periph->path->target;
1821                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1822                                 periph->path->bus->generation;
1823                         cdm->pos.cookie.device = periph->path->device;
1824                         cdm->pos.generations[CAM_DEV_GENERATION] =
1825                                 periph->path->target->generation;
1826                         cdm->pos.cookie.periph = periph;
1827                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1828                                 periph->path->device->generation;
1829                         cdm->status = CAM_DEV_MATCH_MORE;
1830                         return(0);
1831                 }
1832
1833                 j = cdm->num_matches;
1834                 cdm->num_matches++;
1835                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1836                 cdm->matches[j].result.periph_result.path_id =
1837                         periph->path->bus->path_id;
1838                 cdm->matches[j].result.periph_result.target_id =
1839                         periph->path->target->target_id;
1840                 cdm->matches[j].result.periph_result.target_lun =
1841                         periph->path->device->lun_id;
1842                 cdm->matches[j].result.periph_result.unit_number =
1843                         periph->unit_number;
1844                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1845                         periph->periph_name, DEV_IDLEN);
1846         }
1847
1848         return(1);
1849 }
1850
1851 static int
1852 xptedtmatch(struct ccb_dev_match *cdm)
1853 {
1854         struct cam_eb *bus;
1855         int ret;
1856
1857         cdm->num_matches = 0;
1858
1859         /*
1860          * Check the bus list generation.  If it has changed, the user
1861          * needs to reset everything and start over.
1862          */
1863         xpt_lock_buses();
1864         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1865          && (cdm->pos.cookie.bus != NULL)) {
1866                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1867                     xsoftc.bus_generation) {
1868                         xpt_unlock_buses();
1869                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1870                         return(0);
1871                 }
1872                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1873                 bus->refcount++;
1874         } else
1875                 bus = NULL;
1876         xpt_unlock_buses();
1877
1878         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1879
1880         /*
1881          * If we get back 0, that means that we had to stop before fully
1882          * traversing the EDT.  It also means that one of the subroutines
1883          * has set the status field to the proper value.  If we get back 1,
1884          * we've fully traversed the EDT and copied out any matching entries.
1885          */
1886         if (ret == 1)
1887                 cdm->status = CAM_DEV_MATCH_LAST;
1888
1889         return(ret);
1890 }
1891
1892 static int
1893 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1894 {
1895         struct cam_periph *periph;
1896         struct ccb_dev_match *cdm;
1897
1898         cdm = (struct ccb_dev_match *)arg;
1899
1900         xpt_lock_buses();
1901         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1902          && (cdm->pos.cookie.pdrv == pdrv)
1903          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1904          && (cdm->pos.cookie.periph != NULL)) {
1905                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1906                     (*pdrv)->generation) {
1907                         xpt_unlock_buses();
1908                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1909                         return(0);
1910                 }
1911                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1912                 periph->refcount++;
1913         } else
1914                 periph = NULL;
1915         xpt_unlock_buses();
1916
1917         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1918 }
1919
1920 static int
1921 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1922 {
1923         struct ccb_dev_match *cdm;
1924         dev_match_ret retval;
1925
1926         cdm = (struct ccb_dev_match *)arg;
1927
1928         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1929
1930         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1931                 cdm->status = CAM_DEV_MATCH_ERROR;
1932                 return(0);
1933         }
1934
1935         /*
1936          * If the copy flag is set, copy this peripheral out.
1937          */
1938         if (retval & DM_RET_COPY) {
1939                 int spaceleft, j;
1940
1941                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1942                         sizeof(struct dev_match_result));
1943
1944                 /*
1945                  * If we don't have enough space to put in another
1946                  * match result, save our position and tell the
1947                  * user there are more devices to check.
1948                  */
1949                 if (spaceleft < sizeof(struct dev_match_result)) {
1950                         struct periph_driver **pdrv;
1951
1952                         pdrv = NULL;
1953                         bzero(&cdm->pos, sizeof(cdm->pos));
1954                         cdm->pos.position_type =
1955                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1956                                 CAM_DEV_POS_PERIPH;
1957
1958                         /*
1959                          * This may look a bit non-sensical, but it is
1960                          * actually quite logical.  There are very few
1961                          * peripheral drivers, and bloating every peripheral
1962                          * structure with a pointer back to its parent
1963                          * peripheral driver linker set entry would cost
1964                          * more in the long run than doing this quick lookup.
1965                          */
1966                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1967                                 if (strcmp((*pdrv)->driver_name,
1968                                     periph->periph_name) == 0)
1969                                         break;
1970                         }
1971
1972                         if (*pdrv == NULL) {
1973                                 cdm->status = CAM_DEV_MATCH_ERROR;
1974                                 return(0);
1975                         }
1976
1977                         cdm->pos.cookie.pdrv = pdrv;
1978                         /*
1979                          * The periph generation slot does double duty, as
1980                          * does the periph pointer slot.  They are used for
1981                          * both edt and pdrv lookups and positioning.
1982                          */
1983                         cdm->pos.cookie.periph = periph;
1984                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1985                                 (*pdrv)->generation;
1986                         cdm->status = CAM_DEV_MATCH_MORE;
1987                         return(0);
1988                 }
1989
1990                 j = cdm->num_matches;
1991                 cdm->num_matches++;
1992                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1993                 cdm->matches[j].result.periph_result.path_id =
1994                         periph->path->bus->path_id;
1995
1996                 /*
1997                  * The transport layer peripheral doesn't have a target or
1998                  * lun.
1999                  */
2000                 if (periph->path->target)
2001                         cdm->matches[j].result.periph_result.target_id =
2002                                 periph->path->target->target_id;
2003                 else
2004                         cdm->matches[j].result.periph_result.target_id =
2005                                 CAM_TARGET_WILDCARD;
2006
2007                 if (periph->path->device)
2008                         cdm->matches[j].result.periph_result.target_lun =
2009                                 periph->path->device->lun_id;
2010                 else
2011                         cdm->matches[j].result.periph_result.target_lun =
2012                                 CAM_LUN_WILDCARD;
2013
2014                 cdm->matches[j].result.periph_result.unit_number =
2015                         periph->unit_number;
2016                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2017                         periph->periph_name, DEV_IDLEN);
2018         }
2019
2020         return(1);
2021 }
2022
2023 static int
2024 xptperiphlistmatch(struct ccb_dev_match *cdm)
2025 {
2026         int ret;
2027
2028         cdm->num_matches = 0;
2029
2030         /*
2031          * At this point in the edt traversal function, we check the bus
2032          * list generation to make sure that no busses have been added or
2033          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2034          * For the peripheral driver list traversal function, however, we
2035          * don't have to worry about new peripheral driver types coming or
2036          * going; they're in a linker set, and therefore can't change
2037          * without a recompile.
2038          */
2039
2040         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2041          && (cdm->pos.cookie.pdrv != NULL))
2042                 ret = xptpdrvtraverse(
2043                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2044                                 xptplistpdrvfunc, cdm);
2045         else
2046                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2047
2048         /*
2049          * If we get back 0, that means that we had to stop before fully
2050          * traversing the peripheral driver tree.  It also means that one of
2051          * the subroutines has set the status field to the proper value.  If
2052          * we get back 1, we've fully traversed the EDT and copied out any
2053          * matching entries.
2054          */
2055         if (ret == 1)
2056                 cdm->status = CAM_DEV_MATCH_LAST;
2057
2058         return(ret);
2059 }
2060
2061 static int
2062 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2063 {
2064         struct cam_eb *bus, *next_bus;
2065         int retval;
2066
2067         retval = 1;
2068         if (start_bus)
2069                 bus = start_bus;
2070         else {
2071                 xpt_lock_buses();
2072                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2073                 if (bus == NULL) {
2074                         xpt_unlock_buses();
2075                         return (retval);
2076                 }
2077                 bus->refcount++;
2078                 xpt_unlock_buses();
2079         }
2080         for (; bus != NULL; bus = next_bus) {
2081                 retval = tr_func(bus, arg);
2082                 if (retval == 0) {
2083                         xpt_release_bus(bus);
2084                         break;
2085                 }
2086                 xpt_lock_buses();
2087                 next_bus = TAILQ_NEXT(bus, links);
2088                 if (next_bus)
2089                         next_bus->refcount++;
2090                 xpt_unlock_buses();
2091                 xpt_release_bus(bus);
2092         }
2093         return(retval);
2094 }
2095
2096 static int
2097 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2098                   xpt_targetfunc_t *tr_func, void *arg)
2099 {
2100         struct cam_et *target, *next_target;
2101         int retval;
2102
2103         retval = 1;
2104         if (start_target)
2105                 target = start_target;
2106         else {
2107                 mtx_lock(&bus->eb_mtx);
2108                 target = TAILQ_FIRST(&bus->et_entries);
2109                 if (target == NULL) {
2110                         mtx_unlock(&bus->eb_mtx);
2111                         return (retval);
2112                 }
2113                 target->refcount++;
2114                 mtx_unlock(&bus->eb_mtx);
2115         }
2116         for (; target != NULL; target = next_target) {
2117                 retval = tr_func(target, arg);
2118                 if (retval == 0) {
2119                         xpt_release_target(target);
2120                         break;
2121                 }
2122                 mtx_lock(&bus->eb_mtx);
2123                 next_target = TAILQ_NEXT(target, links);
2124                 if (next_target)
2125                         next_target->refcount++;
2126                 mtx_unlock(&bus->eb_mtx);
2127                 xpt_release_target(target);
2128         }
2129         return(retval);
2130 }
2131
2132 static int
2133 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2134                   xpt_devicefunc_t *tr_func, void *arg)
2135 {
2136         struct cam_eb *bus;
2137         struct cam_ed *device, *next_device;
2138         int retval;
2139
2140         retval = 1;
2141         bus = target->bus;
2142         if (start_device)
2143                 device = start_device;
2144         else {
2145                 mtx_lock(&bus->eb_mtx);
2146                 device = TAILQ_FIRST(&target->ed_entries);
2147                 if (device == NULL) {
2148                         mtx_unlock(&bus->eb_mtx);
2149                         return (retval);
2150                 }
2151                 device->refcount++;
2152                 mtx_unlock(&bus->eb_mtx);
2153         }
2154         for (; device != NULL; device = next_device) {
2155                 mtx_lock(&device->device_mtx);
2156                 retval = tr_func(device, arg);
2157                 mtx_unlock(&device->device_mtx);
2158                 if (retval == 0) {
2159                         xpt_release_device(device);
2160                         break;
2161                 }
2162                 mtx_lock(&bus->eb_mtx);
2163                 next_device = TAILQ_NEXT(device, links);
2164                 if (next_device)
2165                         next_device->refcount++;
2166                 mtx_unlock(&bus->eb_mtx);
2167                 xpt_release_device(device);
2168         }
2169         return(retval);
2170 }
2171
2172 static int
2173 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2174                   xpt_periphfunc_t *tr_func, void *arg)
2175 {
2176         struct cam_eb *bus;
2177         struct cam_periph *periph, *next_periph;
2178         int retval;
2179
2180         retval = 1;
2181
2182         bus = device->target->bus;
2183         if (start_periph)
2184                 periph = start_periph;
2185         else {
2186                 xpt_lock_buses();
2187                 mtx_lock(&bus->eb_mtx);
2188                 periph = SLIST_FIRST(&device->periphs);
2189                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2190                         periph = SLIST_NEXT(periph, periph_links);
2191                 if (periph == NULL) {
2192                         mtx_unlock(&bus->eb_mtx);
2193                         xpt_unlock_buses();
2194                         return (retval);
2195                 }
2196                 periph->refcount++;
2197                 mtx_unlock(&bus->eb_mtx);
2198                 xpt_unlock_buses();
2199         }
2200         for (; periph != NULL; periph = next_periph) {
2201                 retval = tr_func(periph, arg);
2202                 if (retval == 0) {
2203                         cam_periph_release_locked(periph);
2204                         break;
2205                 }
2206                 xpt_lock_buses();
2207                 mtx_lock(&bus->eb_mtx);
2208                 next_periph = SLIST_NEXT(periph, periph_links);
2209                 while (next_periph != NULL &&
2210                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2211                         next_periph = SLIST_NEXT(next_periph, periph_links);
2212                 if (next_periph)
2213                         next_periph->refcount++;
2214                 mtx_unlock(&bus->eb_mtx);
2215                 xpt_unlock_buses();
2216                 cam_periph_release_locked(periph);
2217         }
2218         return(retval);
2219 }
2220
2221 static int
2222 xptpdrvtraverse(struct periph_driver **start_pdrv,
2223                 xpt_pdrvfunc_t *tr_func, void *arg)
2224 {
2225         struct periph_driver **pdrv;
2226         int retval;
2227
2228         retval = 1;
2229
2230         /*
2231          * We don't traverse the peripheral driver list like we do the
2232          * other lists, because it is a linker set, and therefore cannot be
2233          * changed during runtime.  If the peripheral driver list is ever
2234          * re-done to be something other than a linker set (i.e. it can
2235          * change while the system is running), the list traversal should
2236          * be modified to work like the other traversal functions.
2237          */
2238         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2239              *pdrv != NULL; pdrv++) {
2240                 retval = tr_func(pdrv, arg);
2241
2242                 if (retval == 0)
2243                         return(retval);
2244         }
2245
2246         return(retval);
2247 }
2248
2249 static int
2250 xptpdperiphtraverse(struct periph_driver **pdrv,
2251                     struct cam_periph *start_periph,
2252                     xpt_periphfunc_t *tr_func, void *arg)
2253 {
2254         struct cam_periph *periph, *next_periph;
2255         int retval;
2256
2257         retval = 1;
2258
2259         if (start_periph)
2260                 periph = start_periph;
2261         else {
2262                 xpt_lock_buses();
2263                 periph = TAILQ_FIRST(&(*pdrv)->units);
2264                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2265                         periph = TAILQ_NEXT(periph, unit_links);
2266                 if (periph == NULL) {
2267                         xpt_unlock_buses();
2268                         return (retval);
2269                 }
2270                 periph->refcount++;
2271                 xpt_unlock_buses();
2272         }
2273         for (; periph != NULL; periph = next_periph) {
2274                 cam_periph_lock(periph);
2275                 retval = tr_func(periph, arg);
2276                 cam_periph_unlock(periph);
2277                 if (retval == 0) {
2278                         cam_periph_release(periph);
2279                         break;
2280                 }
2281                 xpt_lock_buses();
2282                 next_periph = TAILQ_NEXT(periph, unit_links);
2283                 while (next_periph != NULL &&
2284                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2285                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2286                 if (next_periph)
2287                         next_periph->refcount++;
2288                 xpt_unlock_buses();
2289                 cam_periph_release(periph);
2290         }
2291         return(retval);
2292 }
2293
2294 static int
2295 xptdefbusfunc(struct cam_eb *bus, void *arg)
2296 {
2297         struct xpt_traverse_config *tr_config;
2298
2299         tr_config = (struct xpt_traverse_config *)arg;
2300
2301         if (tr_config->depth == XPT_DEPTH_BUS) {
2302                 xpt_busfunc_t *tr_func;
2303
2304                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2305
2306                 return(tr_func(bus, tr_config->tr_arg));
2307         } else
2308                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2309 }
2310
2311 static int
2312 xptdeftargetfunc(struct cam_et *target, void *arg)
2313 {
2314         struct xpt_traverse_config *tr_config;
2315
2316         tr_config = (struct xpt_traverse_config *)arg;
2317
2318         if (tr_config->depth == XPT_DEPTH_TARGET) {
2319                 xpt_targetfunc_t *tr_func;
2320
2321                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2322
2323                 return(tr_func(target, tr_config->tr_arg));
2324         } else
2325                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2326 }
2327
2328 static int
2329 xptdefdevicefunc(struct cam_ed *device, void *arg)
2330 {
2331         struct xpt_traverse_config *tr_config;
2332
2333         tr_config = (struct xpt_traverse_config *)arg;
2334
2335         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2336                 xpt_devicefunc_t *tr_func;
2337
2338                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2339
2340                 return(tr_func(device, tr_config->tr_arg));
2341         } else
2342                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2343 }
2344
2345 static int
2346 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2347 {
2348         struct xpt_traverse_config *tr_config;
2349         xpt_periphfunc_t *tr_func;
2350
2351         tr_config = (struct xpt_traverse_config *)arg;
2352
2353         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2354
2355         /*
2356          * Unlike the other default functions, we don't check for depth
2357          * here.  The peripheral driver level is the last level in the EDT,
2358          * so if we're here, we should execute the function in question.
2359          */
2360         return(tr_func(periph, tr_config->tr_arg));
2361 }
2362
2363 /*
2364  * Execute the given function for every bus in the EDT.
2365  */
2366 static int
2367 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2368 {
2369         struct xpt_traverse_config tr_config;
2370
2371         tr_config.depth = XPT_DEPTH_BUS;
2372         tr_config.tr_func = tr_func;
2373         tr_config.tr_arg = arg;
2374
2375         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2376 }
2377
2378 /*
2379  * Execute the given function for every device in the EDT.
2380  */
2381 static int
2382 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2383 {
2384         struct xpt_traverse_config tr_config;
2385
2386         tr_config.depth = XPT_DEPTH_DEVICE;
2387         tr_config.tr_func = tr_func;
2388         tr_config.tr_arg = arg;
2389
2390         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2391 }
2392
2393 static int
2394 xptsetasyncfunc(struct cam_ed *device, void *arg)
2395 {
2396         struct cam_path path;
2397         struct ccb_getdev cgd;
2398         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2399
2400         /*
2401          * Don't report unconfigured devices (Wildcard devs,
2402          * devices only for target mode, device instances
2403          * that have been invalidated but are waiting for
2404          * their last reference count to be released).
2405          */
2406         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2407                 return (1);
2408
2409         xpt_compile_path(&path,
2410                          NULL,
2411                          device->target->bus->path_id,
2412                          device->target->target_id,
2413                          device->lun_id);
2414         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2415         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2416         xpt_action((union ccb *)&cgd);
2417         csa->callback(csa->callback_arg,
2418                             AC_FOUND_DEVICE,
2419                             &path, &cgd);
2420         xpt_release_path(&path);
2421
2422         return(1);
2423 }
2424
2425 static int
2426 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2427 {
2428         struct cam_path path;
2429         struct ccb_pathinq cpi;
2430         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2431
2432         xpt_compile_path(&path, /*periph*/NULL,
2433                          bus->path_id,
2434                          CAM_TARGET_WILDCARD,
2435                          CAM_LUN_WILDCARD);
2436         xpt_path_lock(&path);
2437         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2438         cpi.ccb_h.func_code = XPT_PATH_INQ;
2439         xpt_action((union ccb *)&cpi);
2440         csa->callback(csa->callback_arg,
2441                             AC_PATH_REGISTERED,
2442                             &path, &cpi);
2443         xpt_path_unlock(&path);
2444         xpt_release_path(&path);
2445
2446         return(1);
2447 }
2448
2449 void
2450 xpt_action(union ccb *start_ccb)
2451 {
2452
2453         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2454
2455         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2456         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2457 }
2458
2459 void
2460 xpt_action_default(union ccb *start_ccb)
2461 {
2462         struct cam_path *path;
2463         struct cam_sim *sim;
2464         int lock;
2465
2466         path = start_ccb->ccb_h.path;
2467         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2468
2469         switch (start_ccb->ccb_h.func_code) {
2470         case XPT_SCSI_IO:
2471         {
2472                 struct cam_ed *device;
2473
2474                 /*
2475                  * For the sake of compatibility with SCSI-1
2476                  * devices that may not understand the identify
2477                  * message, we include lun information in the
2478                  * second byte of all commands.  SCSI-1 specifies
2479                  * that luns are a 3 bit value and reserves only 3
2480                  * bits for lun information in the CDB.  Later
2481                  * revisions of the SCSI spec allow for more than 8
2482                  * luns, but have deprecated lun information in the
2483                  * CDB.  So, if the lun won't fit, we must omit.
2484                  *
2485                  * Also be aware that during initial probing for devices,
2486                  * the inquiry information is unknown but initialized to 0.
2487                  * This means that this code will be exercised while probing
2488                  * devices with an ANSI revision greater than 2.
2489                  */
2490                 device = path->device;
2491                 if (device->protocol_version <= SCSI_REV_2
2492                  && start_ccb->ccb_h.target_lun < 8
2493                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2494
2495                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2496                             start_ccb->ccb_h.target_lun << 5;
2497                 }
2498                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2499         }
2500         /* FALLTHROUGH */
2501         case XPT_TARGET_IO:
2502         case XPT_CONT_TARGET_IO:
2503                 start_ccb->csio.sense_resid = 0;
2504                 start_ccb->csio.resid = 0;
2505                 /* FALLTHROUGH */
2506         case XPT_ATA_IO:
2507                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2508                         start_ccb->ataio.resid = 0;
2509                 /* FALLTHROUGH */
2510         case XPT_RESET_DEV:
2511         case XPT_ENG_EXEC:
2512         case XPT_SMP_IO:
2513         {
2514                 struct cam_devq *devq;
2515
2516                 devq = path->bus->sim->devq;
2517                 mtx_lock(&devq->send_mtx);
2518                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2519                 if (xpt_schedule_devq(devq, path->device) != 0)
2520                         xpt_run_devq(devq);
2521                 mtx_unlock(&devq->send_mtx);
2522                 break;
2523         }
2524         case XPT_CALC_GEOMETRY:
2525                 /* Filter out garbage */
2526                 if (start_ccb->ccg.block_size == 0
2527                  || start_ccb->ccg.volume_size == 0) {
2528                         start_ccb->ccg.cylinders = 0;
2529                         start_ccb->ccg.heads = 0;
2530                         start_ccb->ccg.secs_per_track = 0;
2531                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2532                         break;
2533                 }
2534 #if defined(PC98) || defined(__sparc64__)
2535                 /*
2536                  * In a PC-98 system, geometry translation depens on
2537                  * the "real" device geometry obtained from mode page 4.
2538                  * SCSI geometry translation is performed in the
2539                  * initialization routine of the SCSI BIOS and the result
2540                  * stored in host memory.  If the translation is available
2541                  * in host memory, use it.  If not, rely on the default
2542                  * translation the device driver performs.
2543                  * For sparc64, we may need adjust the geometry of large
2544                  * disks in order to fit the limitations of the 16-bit
2545                  * fields of the VTOC8 disk label.
2546                  */
2547                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2548                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2549                         break;
2550                 }
2551 #endif
2552                 goto call_sim;
2553         case XPT_ABORT:
2554         {
2555                 union ccb* abort_ccb;
2556
2557                 abort_ccb = start_ccb->cab.abort_ccb;
2558                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2559
2560                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2561                                 struct cam_ccbq *ccbq;
2562                                 struct cam_ed *device;
2563
2564                                 device = abort_ccb->ccb_h.path->device;
2565                                 ccbq = &device->ccbq;
2566                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2567                                 abort_ccb->ccb_h.status =
2568                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2569                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2570                                 xpt_done(abort_ccb);
2571                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2572                                 break;
2573                         }
2574                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2575                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2576                                 /*
2577                                  * We've caught this ccb en route to
2578                                  * the SIM.  Flag it for abort and the
2579                                  * SIM will do so just before starting
2580                                  * real work on the CCB.
2581                                  */
2582                                 abort_ccb->ccb_h.status =
2583                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2584                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2585                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2586                                 break;
2587                         }
2588                 }
2589                 if (XPT_FC_IS_QUEUED(abort_ccb)
2590                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2591                         /*
2592                          * It's already completed but waiting
2593                          * for our SWI to get to it.
2594                          */
2595                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2596                         break;
2597                 }
2598                 /*
2599                  * If we weren't able to take care of the abort request
2600                  * in the XPT, pass the request down to the SIM for processing.
2601                  */
2602         }
2603         /* FALLTHROUGH */
2604         case XPT_ACCEPT_TARGET_IO:
2605         case XPT_EN_LUN:
2606         case XPT_IMMED_NOTIFY:
2607         case XPT_NOTIFY_ACK:
2608         case XPT_RESET_BUS:
2609         case XPT_IMMEDIATE_NOTIFY:
2610         case XPT_NOTIFY_ACKNOWLEDGE:
2611         case XPT_GET_SIM_KNOB:
2612         case XPT_SET_SIM_KNOB:
2613         case XPT_GET_TRAN_SETTINGS:
2614         case XPT_SET_TRAN_SETTINGS:
2615         case XPT_PATH_INQ:
2616 call_sim:
2617                 sim = path->bus->sim;
2618                 lock = (mtx_owned(sim->mtx) == 0);
2619                 if (lock)
2620                         CAM_SIM_LOCK(sim);
2621                 (*(sim->sim_action))(sim, start_ccb);
2622                 if (lock)
2623                         CAM_SIM_UNLOCK(sim);
2624                 break;
2625         case XPT_PATH_STATS:
2626                 start_ccb->cpis.last_reset = path->bus->last_reset;
2627                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2628                 break;
2629         case XPT_GDEV_TYPE:
2630         {
2631                 struct cam_ed *dev;
2632
2633                 dev = path->device;
2634                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2635                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2636                 } else {
2637                         struct ccb_getdev *cgd;
2638
2639                         cgd = &start_ccb->cgd;
2640                         cgd->protocol = dev->protocol;
2641                         cgd->inq_data = dev->inq_data;
2642                         cgd->ident_data = dev->ident_data;
2643                         cgd->inq_flags = dev->inq_flags;
2644                         cgd->ccb_h.status = CAM_REQ_CMP;
2645                         cgd->serial_num_len = dev->serial_num_len;
2646                         if ((dev->serial_num_len > 0)
2647                          && (dev->serial_num != NULL))
2648                                 bcopy(dev->serial_num, cgd->serial_num,
2649                                       dev->serial_num_len);
2650                 }
2651                 break;
2652         }
2653         case XPT_GDEV_STATS:
2654         {
2655                 struct cam_ed *dev;
2656
2657                 dev = path->device;
2658                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2659                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2660                 } else {
2661                         struct ccb_getdevstats *cgds;
2662                         struct cam_eb *bus;
2663                         struct cam_et *tar;
2664                         struct cam_devq *devq;
2665
2666                         cgds = &start_ccb->cgds;
2667                         bus = path->bus;
2668                         tar = path->target;
2669                         devq = bus->sim->devq;
2670                         mtx_lock(&devq->send_mtx);
2671                         cgds->dev_openings = dev->ccbq.dev_openings;
2672                         cgds->dev_active = dev->ccbq.dev_active;
2673                         cgds->allocated = dev->ccbq.allocated;
2674                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2675                         cgds->held = cgds->allocated - cgds->dev_active -
2676                             cgds->queued;
2677                         cgds->last_reset = tar->last_reset;
2678                         cgds->maxtags = dev->maxtags;
2679                         cgds->mintags = dev->mintags;
2680                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2681                                 cgds->last_reset = bus->last_reset;
2682                         mtx_unlock(&devq->send_mtx);
2683                         cgds->ccb_h.status = CAM_REQ_CMP;
2684                 }
2685                 break;
2686         }
2687         case XPT_GDEVLIST:
2688         {
2689                 struct cam_periph       *nperiph;
2690                 struct periph_list      *periph_head;
2691                 struct ccb_getdevlist   *cgdl;
2692                 u_int                   i;
2693                 struct cam_ed           *device;
2694                 int                     found;
2695
2696
2697                 found = 0;
2698
2699                 /*
2700                  * Don't want anyone mucking with our data.
2701                  */
2702                 device = path->device;
2703                 periph_head = &device->periphs;
2704                 cgdl = &start_ccb->cgdl;
2705
2706                 /*
2707                  * Check and see if the list has changed since the user
2708                  * last requested a list member.  If so, tell them that the
2709                  * list has changed, and therefore they need to start over
2710                  * from the beginning.
2711                  */
2712                 if ((cgdl->index != 0) &&
2713                     (cgdl->generation != device->generation)) {
2714                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2715                         break;
2716                 }
2717
2718                 /*
2719                  * Traverse the list of peripherals and attempt to find
2720                  * the requested peripheral.
2721                  */
2722                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2723                      (nperiph != NULL) && (i <= cgdl->index);
2724                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2725                         if (i == cgdl->index) {
2726                                 strncpy(cgdl->periph_name,
2727                                         nperiph->periph_name,
2728                                         DEV_IDLEN);
2729                                 cgdl->unit_number = nperiph->unit_number;
2730                                 found = 1;
2731                         }
2732                 }
2733                 if (found == 0) {
2734                         cgdl->status = CAM_GDEVLIST_ERROR;
2735                         break;
2736                 }
2737
2738                 if (nperiph == NULL)
2739                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2740                 else
2741                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2742
2743                 cgdl->index++;
2744                 cgdl->generation = device->generation;
2745
2746                 cgdl->ccb_h.status = CAM_REQ_CMP;
2747                 break;
2748         }
2749         case XPT_DEV_MATCH:
2750         {
2751                 dev_pos_type position_type;
2752                 struct ccb_dev_match *cdm;
2753
2754                 cdm = &start_ccb->cdm;
2755
2756                 /*
2757                  * There are two ways of getting at information in the EDT.
2758                  * The first way is via the primary EDT tree.  It starts
2759                  * with a list of busses, then a list of targets on a bus,
2760                  * then devices/luns on a target, and then peripherals on a
2761                  * device/lun.  The "other" way is by the peripheral driver
2762                  * lists.  The peripheral driver lists are organized by
2763                  * peripheral driver.  (obviously)  So it makes sense to
2764                  * use the peripheral driver list if the user is looking
2765                  * for something like "da1", or all "da" devices.  If the
2766                  * user is looking for something on a particular bus/target
2767                  * or lun, it's generally better to go through the EDT tree.
2768                  */
2769
2770                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2771                         position_type = cdm->pos.position_type;
2772                 else {
2773                         u_int i;
2774
2775                         position_type = CAM_DEV_POS_NONE;
2776
2777                         for (i = 0; i < cdm->num_patterns; i++) {
2778                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2779                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2780                                         position_type = CAM_DEV_POS_EDT;
2781                                         break;
2782                                 }
2783                         }
2784
2785                         if (cdm->num_patterns == 0)
2786                                 position_type = CAM_DEV_POS_EDT;
2787                         else if (position_type == CAM_DEV_POS_NONE)
2788                                 position_type = CAM_DEV_POS_PDRV;
2789                 }
2790
2791                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2792                 case CAM_DEV_POS_EDT:
2793                         xptedtmatch(cdm);
2794                         break;
2795                 case CAM_DEV_POS_PDRV:
2796                         xptperiphlistmatch(cdm);
2797                         break;
2798                 default:
2799                         cdm->status = CAM_DEV_MATCH_ERROR;
2800                         break;
2801                 }
2802
2803                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2804                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2805                 else
2806                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2807
2808                 break;
2809         }
2810         case XPT_SASYNC_CB:
2811         {
2812                 struct ccb_setasync *csa;
2813                 struct async_node *cur_entry;
2814                 struct async_list *async_head;
2815                 u_int32_t added;
2816
2817                 csa = &start_ccb->csa;
2818                 added = csa->event_enable;
2819                 async_head = &path->device->asyncs;
2820
2821                 /*
2822                  * If there is already an entry for us, simply
2823                  * update it.
2824                  */
2825                 cur_entry = SLIST_FIRST(async_head);
2826                 while (cur_entry != NULL) {
2827                         if ((cur_entry->callback_arg == csa->callback_arg)
2828                          && (cur_entry->callback == csa->callback))
2829                                 break;
2830                         cur_entry = SLIST_NEXT(cur_entry, links);
2831                 }
2832
2833                 if (cur_entry != NULL) {
2834                         /*
2835                          * If the request has no flags set,
2836                          * remove the entry.
2837                          */
2838                         added &= ~cur_entry->event_enable;
2839                         if (csa->event_enable == 0) {
2840                                 SLIST_REMOVE(async_head, cur_entry,
2841                                              async_node, links);
2842                                 xpt_release_device(path->device);
2843                                 free(cur_entry, M_CAMXPT);
2844                         } else {
2845                                 cur_entry->event_enable = csa->event_enable;
2846                         }
2847                         csa->event_enable = added;
2848                 } else {
2849                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2850                                            M_NOWAIT);
2851                         if (cur_entry == NULL) {
2852                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2853                                 break;
2854                         }
2855                         cur_entry->event_enable = csa->event_enable;
2856                         cur_entry->event_lock =
2857                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2858                         cur_entry->callback_arg = csa->callback_arg;
2859                         cur_entry->callback = csa->callback;
2860                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2861                         xpt_acquire_device(path->device);
2862                 }
2863                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2864                 break;
2865         }
2866         case XPT_REL_SIMQ:
2867         {
2868                 struct ccb_relsim *crs;
2869                 struct cam_ed *dev;
2870
2871                 crs = &start_ccb->crs;
2872                 dev = path->device;
2873                 if (dev == NULL) {
2874
2875                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2876                         break;
2877                 }
2878
2879                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2880
2881                         /* Don't ever go below one opening */
2882                         if (crs->openings > 0) {
2883                                 xpt_dev_ccbq_resize(path, crs->openings);
2884                                 if (bootverbose) {
2885                                         xpt_print(path,
2886                                             "number of openings is now %d\n",
2887                                             crs->openings);
2888                                 }
2889                         }
2890                 }
2891
2892                 mtx_lock(&dev->sim->devq->send_mtx);
2893                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2894
2895                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2896
2897                                 /*
2898                                  * Just extend the old timeout and decrement
2899                                  * the freeze count so that a single timeout
2900                                  * is sufficient for releasing the queue.
2901                                  */
2902                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2903                                 callout_stop(&dev->callout);
2904                         } else {
2905
2906                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2907                         }
2908
2909                         callout_reset_sbt(&dev->callout,
2910                             SBT_1MS * crs->release_timeout, 0,
2911                             xpt_release_devq_timeout, dev, 0);
2912
2913                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2914
2915                 }
2916
2917                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2918
2919                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2920                                 /*
2921                                  * Decrement the freeze count so that a single
2922                                  * completion is still sufficient to unfreeze
2923                                  * the queue.
2924                                  */
2925                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2926                         } else {
2927
2928                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2929                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2930                         }
2931                 }
2932
2933                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2934
2935                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2936                          || (dev->ccbq.dev_active == 0)) {
2937
2938                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2939                         } else {
2940
2941                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2942                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2943                         }
2944                 }
2945                 mtx_unlock(&dev->sim->devq->send_mtx);
2946
2947                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2948                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2949                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2950                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2951                 break;
2952         }
2953         case XPT_DEBUG: {
2954                 struct cam_path *oldpath;
2955
2956                 /* Check that all request bits are supported. */
2957                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2958                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2959                         break;
2960                 }
2961
2962                 cam_dflags = CAM_DEBUG_NONE;
2963                 if (cam_dpath != NULL) {
2964                         oldpath = cam_dpath;
2965                         cam_dpath = NULL;
2966                         xpt_free_path(oldpath);
2967                 }
2968                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2969                         if (xpt_create_path(&cam_dpath, NULL,
2970                                             start_ccb->ccb_h.path_id,
2971                                             start_ccb->ccb_h.target_id,
2972                                             start_ccb->ccb_h.target_lun) !=
2973                                             CAM_REQ_CMP) {
2974                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2975                         } else {
2976                                 cam_dflags = start_ccb->cdbg.flags;
2977                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2978                                 xpt_print(cam_dpath, "debugging flags now %x\n",
2979                                     cam_dflags);
2980                         }
2981                 } else
2982                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2983                 break;
2984         }
2985         case XPT_NOOP:
2986                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2987                         xpt_freeze_devq(path, 1);
2988                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2989                 break;
2990         default:
2991         case XPT_SDEV_TYPE:
2992         case XPT_TERM_IO:
2993         case XPT_ENG_INQ:
2994                 /* XXX Implement */
2995                 printf("%s: CCB type %#x not supported\n", __func__,
2996                        start_ccb->ccb_h.func_code);
2997                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
2998                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
2999                         xpt_done(start_ccb);
3000                 }
3001                 break;
3002         }
3003 }
3004
3005 void
3006 xpt_polled_action(union ccb *start_ccb)
3007 {
3008         u_int32_t timeout;
3009         struct    cam_sim *sim;
3010         struct    cam_devq *devq;
3011         struct    cam_ed *dev;
3012
3013         timeout = start_ccb->ccb_h.timeout * 10;
3014         sim = start_ccb->ccb_h.path->bus->sim;
3015         devq = sim->devq;
3016         dev = start_ccb->ccb_h.path->device;
3017
3018         mtx_unlock(&dev->device_mtx);
3019
3020         /*
3021          * Steal an opening so that no other queued requests
3022          * can get it before us while we simulate interrupts.
3023          */
3024         mtx_lock(&devq->send_mtx);
3025         dev->ccbq.dev_openings--;
3026         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3027             (--timeout > 0)) {
3028                 mtx_unlock(&devq->send_mtx);
3029                 DELAY(100);
3030                 CAM_SIM_LOCK(sim);
3031                 (*(sim->sim_poll))(sim);
3032                 CAM_SIM_UNLOCK(sim);
3033                 camisr_runqueue();
3034                 mtx_lock(&devq->send_mtx);
3035         }
3036         dev->ccbq.dev_openings++;
3037         mtx_unlock(&devq->send_mtx);
3038
3039         if (timeout != 0) {
3040                 xpt_action(start_ccb);
3041                 while(--timeout > 0) {
3042                         CAM_SIM_LOCK(sim);
3043                         (*(sim->sim_poll))(sim);
3044                         CAM_SIM_UNLOCK(sim);
3045                         camisr_runqueue();
3046                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3047                             != CAM_REQ_INPROG)
3048                                 break;
3049                         DELAY(100);
3050                 }
3051                 if (timeout == 0) {
3052                         /*
3053                          * XXX Is it worth adding a sim_timeout entry
3054                          * point so we can attempt recovery?  If
3055                          * this is only used for dumps, I don't think
3056                          * it is.
3057                          */
3058                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3059                 }
3060         } else {
3061                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3062         }
3063
3064         mtx_lock(&dev->device_mtx);
3065 }
3066
3067 /*
3068  * Schedule a peripheral driver to receive a ccb when its
3069  * target device has space for more transactions.
3070  */
3071 void
3072 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3073 {
3074
3075         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3076         cam_periph_assert(periph, MA_OWNED);
3077         if (new_priority < periph->scheduled_priority) {
3078                 periph->scheduled_priority = new_priority;
3079                 xpt_run_allocq(periph, 0);
3080         }
3081 }
3082
3083
3084 /*
3085  * Schedule a device to run on a given queue.
3086  * If the device was inserted as a new entry on the queue,
3087  * return 1 meaning the device queue should be run. If we
3088  * were already queued, implying someone else has already
3089  * started the queue, return 0 so the caller doesn't attempt
3090  * to run the queue.
3091  */
3092 static int
3093 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3094                  u_int32_t new_priority)
3095 {
3096         int retval;
3097         u_int32_t old_priority;
3098
3099         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3100
3101         old_priority = pinfo->priority;
3102
3103         /*
3104          * Are we already queued?
3105          */
3106         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3107                 /* Simply reorder based on new priority */
3108                 if (new_priority < old_priority) {
3109                         camq_change_priority(queue, pinfo->index,
3110                                              new_priority);
3111                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3112                                         ("changed priority to %d\n",
3113                                          new_priority));
3114                         retval = 1;
3115                 } else
3116                         retval = 0;
3117         } else {
3118                 /* New entry on the queue */
3119                 if (new_priority < old_priority)
3120                         pinfo->priority = new_priority;
3121
3122                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3123                                 ("Inserting onto queue\n"));
3124                 pinfo->generation = ++queue->generation;
3125                 camq_insert(queue, pinfo);
3126                 retval = 1;
3127         }
3128         return (retval);
3129 }
3130
3131 static void
3132 xpt_run_allocq_task(void *context, int pending)
3133 {
3134         struct cam_periph *periph = context;
3135
3136         cam_periph_lock(periph);
3137         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3138         xpt_run_allocq(periph, 1);
3139         cam_periph_unlock(periph);
3140         cam_periph_release(periph);
3141 }
3142
3143 static void
3144 xpt_run_allocq(struct cam_periph *periph, int sleep)
3145 {
3146         struct cam_ed   *device;
3147         union ccb       *ccb;
3148         uint32_t         prio;
3149
3150         cam_periph_assert(periph, MA_OWNED);
3151         if (periph->periph_allocating)
3152                 return;
3153         periph->periph_allocating = 1;
3154         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3155         device = periph->path->device;
3156         ccb = NULL;
3157 restart:
3158         while ((prio = min(periph->scheduled_priority,
3159             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3160             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3161              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3162
3163                 if (ccb == NULL &&
3164                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3165                         if (sleep) {
3166                                 ccb = xpt_get_ccb(periph);
3167                                 goto restart;
3168                         }
3169                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3170                                 break;
3171                         cam_periph_doacquire(periph);
3172                         periph->flags |= CAM_PERIPH_RUN_TASK;
3173                         taskqueue_enqueue(xsoftc.xpt_taskq,
3174                             &periph->periph_run_task);
3175                         break;
3176                 }
3177                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3178                 if (prio == periph->immediate_priority) {
3179                         periph->immediate_priority = CAM_PRIORITY_NONE;
3180                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3181                                         ("waking cam_periph_getccb()\n"));
3182                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3183                                           periph_links.sle);
3184                         wakeup(&periph->ccb_list);
3185                 } else {
3186                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3187                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3188                                         ("calling periph_start()\n"));
3189                         periph->periph_start(periph, ccb);
3190                 }
3191                 ccb = NULL;
3192         }
3193         if (ccb != NULL)
3194                 xpt_release_ccb(ccb);
3195         periph->periph_allocating = 0;
3196 }
3197
3198 static void
3199 xpt_run_devq(struct cam_devq *devq)
3200 {
3201         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3202         int lock;
3203
3204         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3205
3206         devq->send_queue.qfrozen_cnt++;
3207         while ((devq->send_queue.entries > 0)
3208             && (devq->send_openings > 0)
3209             && (devq->send_queue.qfrozen_cnt <= 1)) {
3210                 struct  cam_ed *device;
3211                 union ccb *work_ccb;
3212                 struct  cam_sim *sim;
3213
3214                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3215                                                            CAMQ_HEAD);
3216                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3217                                 ("running device %p\n", device));
3218
3219                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3220                 if (work_ccb == NULL) {
3221                         printf("device on run queue with no ccbs???\n");
3222                         continue;
3223                 }
3224
3225                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3226
3227                         mtx_lock(&xsoftc.xpt_highpower_lock);
3228                         if (xsoftc.num_highpower <= 0) {
3229                                 /*
3230                                  * We got a high power command, but we
3231                                  * don't have any available slots.  Freeze
3232                                  * the device queue until we have a slot
3233                                  * available.
3234                                  */
3235                                 xpt_freeze_devq_device(device, 1);
3236                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3237                                                    highpowerq_entry);
3238
3239                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3240                                 continue;
3241                         } else {
3242                                 /*
3243                                  * Consume a high power slot while
3244                                  * this ccb runs.
3245                                  */
3246                                 xsoftc.num_highpower--;
3247                         }
3248                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3249                 }
3250                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3251                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3252                 devq->send_openings--;
3253                 devq->send_active++;
3254                 xpt_schedule_devq(devq, device);
3255                 mtx_unlock(&devq->send_mtx);
3256
3257                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3258                         /*
3259                          * The client wants to freeze the queue
3260                          * after this CCB is sent.
3261                          */
3262                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3263                 }
3264
3265                 /* In Target mode, the peripheral driver knows best... */
3266                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3267                         if ((device->inq_flags & SID_CmdQue) != 0
3268                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3269                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3270                         else
3271                                 /*
3272                                  * Clear this in case of a retried CCB that
3273                                  * failed due to a rejected tag.
3274                                  */
3275                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3276                 }
3277
3278                 switch (work_ccb->ccb_h.func_code) {
3279                 case XPT_SCSI_IO:
3280                         CAM_DEBUG(work_ccb->ccb_h.path,
3281                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3282                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3283                                           &device->inq_data),
3284                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3285                                              cdb_str, sizeof(cdb_str))));
3286                         break;
3287                 case XPT_ATA_IO:
3288                         CAM_DEBUG(work_ccb->ccb_h.path,
3289                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3290                              ata_op_string(&work_ccb->ataio.cmd),
3291                              ata_cmd_string(&work_ccb->ataio.cmd,
3292                                             cdb_str, sizeof(cdb_str))));
3293                         break;
3294                 default:
3295                         break;
3296                 }
3297
3298                 /*
3299                  * Device queues can be shared among multiple SIM instances
3300                  * that reside on different busses.  Use the SIM from the
3301                  * queued device, rather than the one from the calling bus.
3302                  */
3303                 sim = device->sim;
3304                 lock = (mtx_owned(sim->mtx) == 0);
3305                 if (lock)
3306                         CAM_SIM_LOCK(sim);
3307                 (*(sim->sim_action))(sim, work_ccb);
3308                 if (lock)
3309                         CAM_SIM_UNLOCK(sim);
3310                 mtx_lock(&devq->send_mtx);
3311         }
3312         devq->send_queue.qfrozen_cnt--;
3313 }
3314
3315 /*
3316  * This function merges stuff from the slave ccb into the master ccb, while
3317  * keeping important fields in the master ccb constant.
3318  */
3319 void
3320 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3321 {
3322
3323         /*
3324          * Pull fields that are valid for peripheral drivers to set
3325          * into the master CCB along with the CCB "payload".
3326          */
3327         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3328         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3329         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3330         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3331         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3332               sizeof(union ccb) - sizeof(struct ccb_hdr));
3333 }
3334
3335 void
3336 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3337 {
3338
3339         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3340         ccb_h->pinfo.priority = priority;
3341         ccb_h->path = path;
3342         ccb_h->path_id = path->bus->path_id;
3343         if (path->target)
3344                 ccb_h->target_id = path->target->target_id;
3345         else
3346                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3347         if (path->device) {
3348                 ccb_h->target_lun = path->device->lun_id;
3349                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3350         } else {
3351                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3352         }
3353         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3354         ccb_h->flags = 0;
3355         ccb_h->xflags = 0;
3356 }
3357
3358 /* Path manipulation functions */
3359 cam_status
3360 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3361                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3362 {
3363         struct     cam_path *path;
3364         cam_status status;
3365
3366         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3367
3368         if (path == NULL) {
3369                 status = CAM_RESRC_UNAVAIL;
3370                 return(status);
3371         }
3372         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3373         if (status != CAM_REQ_CMP) {
3374                 free(path, M_CAMPATH);
3375                 path = NULL;
3376         }
3377         *new_path_ptr = path;
3378         return (status);
3379 }
3380
3381 cam_status
3382 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3383                          struct cam_periph *periph, path_id_t path_id,
3384                          target_id_t target_id, lun_id_t lun_id)
3385 {
3386
3387         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3388             lun_id));
3389 }
3390
3391 cam_status
3392 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3393                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3394 {
3395         struct       cam_eb *bus;
3396         struct       cam_et *target;
3397         struct       cam_ed *device;
3398         cam_status   status;
3399
3400         status = CAM_REQ_CMP;   /* Completed without error */
3401         target = NULL;          /* Wildcarded */
3402         device = NULL;          /* Wildcarded */
3403
3404         /*
3405          * We will potentially modify the EDT, so block interrupts
3406          * that may attempt to create cam paths.
3407          */
3408         bus = xpt_find_bus(path_id);
3409         if (bus == NULL) {
3410                 status = CAM_PATH_INVALID;
3411         } else {
3412                 xpt_lock_buses();
3413                 mtx_lock(&bus->eb_mtx);
3414                 target = xpt_find_target(bus, target_id);
3415                 if (target == NULL) {
3416                         /* Create one */
3417                         struct cam_et *new_target;
3418
3419                         new_target = xpt_alloc_target(bus, target_id);
3420                         if (new_target == NULL) {
3421                                 status = CAM_RESRC_UNAVAIL;
3422                         } else {
3423                                 target = new_target;
3424                         }
3425                 }
3426                 xpt_unlock_buses();
3427                 if (target != NULL) {
3428                         device = xpt_find_device(target, lun_id);
3429                         if (device == NULL) {
3430                                 /* Create one */
3431                                 struct cam_ed *new_device;
3432
3433                                 new_device =
3434                                     (*(bus->xport->alloc_device))(bus,
3435                                                                       target,
3436                                                                       lun_id);
3437                                 if (new_device == NULL) {
3438                                         status = CAM_RESRC_UNAVAIL;
3439                                 } else {
3440                                         device = new_device;
3441                                 }
3442                         }
3443                 }
3444                 mtx_unlock(&bus->eb_mtx);
3445         }
3446
3447         /*
3448          * Only touch the user's data if we are successful.
3449          */
3450         if (status == CAM_REQ_CMP) {
3451                 new_path->periph = perph;
3452                 new_path->bus = bus;
3453                 new_path->target = target;
3454                 new_path->device = device;
3455                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3456         } else {
3457                 if (device != NULL)
3458                         xpt_release_device(device);
3459                 if (target != NULL)
3460                         xpt_release_target(target);
3461                 if (bus != NULL)
3462                         xpt_release_bus(bus);
3463         }
3464         return (status);
3465 }
3466
3467 cam_status
3468 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3469 {
3470         struct     cam_path *new_path;
3471
3472         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3473         if (new_path == NULL)
3474                 return(CAM_RESRC_UNAVAIL);
3475         xpt_copy_path(new_path, path);
3476         *new_path_ptr = new_path;
3477         return (CAM_REQ_CMP);
3478 }
3479
3480 void
3481 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3482 {
3483
3484         *new_path = *path;
3485         if (path->bus != NULL)
3486                 xpt_acquire_bus(path->bus);
3487         if (path->target != NULL)
3488                 xpt_acquire_target(path->target);
3489         if (path->device != NULL)
3490                 xpt_acquire_device(path->device);
3491 }
3492
3493 void
3494 xpt_release_path(struct cam_path *path)
3495 {
3496         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3497         if (path->device != NULL) {
3498                 xpt_release_device(path->device);
3499                 path->device = NULL;
3500         }
3501         if (path->target != NULL) {
3502                 xpt_release_target(path->target);
3503                 path->target = NULL;
3504         }
3505         if (path->bus != NULL) {
3506                 xpt_release_bus(path->bus);
3507                 path->bus = NULL;
3508         }
3509 }
3510
3511 void
3512 xpt_free_path(struct cam_path *path)
3513 {
3514
3515         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3516         xpt_release_path(path);
3517         free(path, M_CAMPATH);
3518 }
3519
3520 void
3521 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3522     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3523 {
3524
3525         xpt_lock_buses();
3526         if (bus_ref) {
3527                 if (path->bus)
3528                         *bus_ref = path->bus->refcount;
3529                 else
3530                         *bus_ref = 0;
3531         }
3532         if (periph_ref) {
3533                 if (path->periph)
3534                         *periph_ref = path->periph->refcount;
3535                 else
3536                         *periph_ref = 0;
3537         }
3538         xpt_unlock_buses();
3539         if (target_ref) {
3540                 if (path->target)
3541                         *target_ref = path->target->refcount;
3542                 else
3543                         *target_ref = 0;
3544         }
3545         if (device_ref) {
3546                 if (path->device)
3547                         *device_ref = path->device->refcount;
3548                 else
3549                         *device_ref = 0;
3550         }
3551 }
3552
3553 /*
3554  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3555  * in path1, 2 for match with wildcards in path2.
3556  */
3557 int
3558 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3559 {
3560         int retval = 0;
3561
3562         if (path1->bus != path2->bus) {
3563                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3564                         retval = 1;
3565                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3566                         retval = 2;
3567                 else
3568                         return (-1);
3569         }
3570         if (path1->target != path2->target) {
3571                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3572                         if (retval == 0)
3573                                 retval = 1;
3574                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3575                         retval = 2;
3576                 else
3577                         return (-1);
3578         }
3579         if (path1->device != path2->device) {
3580                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3581                         if (retval == 0)
3582                                 retval = 1;
3583                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3584                         retval = 2;
3585                 else
3586                         return (-1);
3587         }
3588         return (retval);
3589 }
3590
3591 int
3592 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3593 {
3594         int retval = 0;
3595
3596         if (path->bus != dev->target->bus) {
3597                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3598                         retval = 1;
3599                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3600                         retval = 2;
3601                 else
3602                         return (-1);
3603         }
3604         if (path->target != dev->target) {
3605                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3606                         if (retval == 0)
3607                                 retval = 1;
3608                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3609                         retval = 2;
3610                 else
3611                         return (-1);
3612         }
3613         if (path->device != dev) {
3614                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3615                         if (retval == 0)
3616                                 retval = 1;
3617                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3618                         retval = 2;
3619                 else
3620                         return (-1);
3621         }
3622         return (retval);
3623 }
3624
3625 void
3626 xpt_print_path(struct cam_path *path)
3627 {
3628
3629         if (path == NULL)
3630                 printf("(nopath): ");
3631         else {
3632                 if (path->periph != NULL)
3633                         printf("(%s%d:", path->periph->periph_name,
3634                                path->periph->unit_number);
3635                 else
3636                         printf("(noperiph:");
3637
3638                 if (path->bus != NULL)
3639                         printf("%s%d:%d:", path->bus->sim->sim_name,
3640                                path->bus->sim->unit_number,
3641                                path->bus->sim->bus_id);
3642                 else
3643                         printf("nobus:");
3644
3645                 if (path->target != NULL)
3646                         printf("%d:", path->target->target_id);
3647                 else
3648                         printf("X:");
3649
3650                 if (path->device != NULL)
3651                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3652                 else
3653                         printf("X): ");
3654         }
3655 }
3656
3657 void
3658 xpt_print_device(struct cam_ed *device)
3659 {
3660
3661         if (device == NULL)
3662                 printf("(nopath): ");
3663         else {
3664                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3665                        device->sim->unit_number,
3666                        device->sim->bus_id,
3667                        device->target->target_id,
3668                        (uintmax_t)device->lun_id);
3669         }
3670 }
3671
3672 void
3673 xpt_print(struct cam_path *path, const char *fmt, ...)
3674 {
3675         va_list ap;
3676         xpt_print_path(path);
3677         va_start(ap, fmt);
3678         vprintf(fmt, ap);
3679         va_end(ap);
3680 }
3681
3682 int
3683 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3684 {
3685         struct sbuf sb;
3686
3687         sbuf_new(&sb, str, str_len, 0);
3688
3689         if (path == NULL)
3690                 sbuf_printf(&sb, "(nopath): ");
3691         else {
3692                 if (path->periph != NULL)
3693                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3694                                     path->periph->unit_number);
3695                 else
3696                         sbuf_printf(&sb, "(noperiph:");
3697
3698                 if (path->bus != NULL)
3699                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3700                                     path->bus->sim->unit_number,
3701                                     path->bus->sim->bus_id);
3702                 else
3703                         sbuf_printf(&sb, "nobus:");
3704
3705                 if (path->target != NULL)
3706                         sbuf_printf(&sb, "%d:", path->target->target_id);
3707                 else
3708                         sbuf_printf(&sb, "X:");
3709
3710                 if (path->device != NULL)
3711                         sbuf_printf(&sb, "%jx): ",
3712                             (uintmax_t)path->device->lun_id);
3713                 else
3714                         sbuf_printf(&sb, "X): ");
3715         }
3716         sbuf_finish(&sb);
3717
3718         return(sbuf_len(&sb));
3719 }
3720
3721 path_id_t
3722 xpt_path_path_id(struct cam_path *path)
3723 {
3724         return(path->bus->path_id);
3725 }
3726
3727 target_id_t
3728 xpt_path_target_id(struct cam_path *path)
3729 {
3730         if (path->target != NULL)
3731                 return (path->target->target_id);
3732         else
3733                 return (CAM_TARGET_WILDCARD);
3734 }
3735
3736 lun_id_t
3737 xpt_path_lun_id(struct cam_path *path)
3738 {
3739         if (path->device != NULL)
3740                 return (path->device->lun_id);
3741         else
3742                 return (CAM_LUN_WILDCARD);
3743 }
3744
3745 struct cam_sim *
3746 xpt_path_sim(struct cam_path *path)
3747 {
3748
3749         return (path->bus->sim);
3750 }
3751
3752 struct cam_periph*
3753 xpt_path_periph(struct cam_path *path)
3754 {
3755
3756         return (path->periph);
3757 }
3758
3759 /*
3760  * Release a CAM control block for the caller.  Remit the cost of the structure
3761  * to the device referenced by the path.  If the this device had no 'credits'
3762  * and peripheral drivers have registered async callbacks for this notification
3763  * call them now.
3764  */
3765 void
3766 xpt_release_ccb(union ccb *free_ccb)
3767 {
3768         struct   cam_ed *device;
3769         struct   cam_periph *periph;
3770
3771         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3772         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3773         device = free_ccb->ccb_h.path->device;
3774         periph = free_ccb->ccb_h.path->periph;
3775
3776         xpt_free_ccb(free_ccb);
3777         periph->periph_allocated--;
3778         cam_ccbq_release_opening(&device->ccbq);
3779         xpt_run_allocq(periph, 0);
3780 }
3781
3782 /* Functions accessed by SIM drivers */
3783
3784 static struct xpt_xport xport_default = {
3785         .alloc_device = xpt_alloc_device_default,
3786         .action = xpt_action_default,
3787         .async = xpt_dev_async_default,
3788 };
3789
3790 /*
3791  * A sim structure, listing the SIM entry points and instance
3792  * identification info is passed to xpt_bus_register to hook the SIM
3793  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3794  * for this new bus and places it in the array of busses and assigns
3795  * it a path_id.  The path_id may be influenced by "hard wiring"
3796  * information specified by the user.  Once interrupt services are
3797  * available, the bus will be probed.
3798  */
3799 int32_t
3800 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3801 {
3802         struct cam_eb *new_bus;
3803         struct cam_eb *old_bus;
3804         struct ccb_pathinq cpi;
3805         struct cam_path *path;
3806         cam_status status;
3807
3808         mtx_assert(sim->mtx, MA_OWNED);
3809
3810         sim->bus_id = bus;
3811         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3812                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3813         if (new_bus == NULL) {
3814                 /* Couldn't satisfy request */
3815                 return (CAM_RESRC_UNAVAIL);
3816         }
3817
3818         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3819         TAILQ_INIT(&new_bus->et_entries);
3820         cam_sim_hold(sim);
3821         new_bus->sim = sim;
3822         timevalclear(&new_bus->last_reset);
3823         new_bus->flags = 0;
3824         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3825         new_bus->generation = 0;
3826
3827         xpt_lock_buses();
3828         sim->path_id = new_bus->path_id =
3829             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3830         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3831         while (old_bus != NULL
3832             && old_bus->path_id < new_bus->path_id)
3833                 old_bus = TAILQ_NEXT(old_bus, links);
3834         if (old_bus != NULL)
3835                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3836         else
3837                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3838         xsoftc.bus_generation++;
3839         xpt_unlock_buses();
3840
3841         /*
3842          * Set a default transport so that a PATH_INQ can be issued to
3843          * the SIM.  This will then allow for probing and attaching of
3844          * a more appropriate transport.
3845          */
3846         new_bus->xport = &xport_default;
3847
3848         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3849                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3850         if (status != CAM_REQ_CMP) {
3851                 xpt_release_bus(new_bus);
3852                 free(path, M_CAMXPT);
3853                 return (CAM_RESRC_UNAVAIL);
3854         }
3855
3856         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3857         cpi.ccb_h.func_code = XPT_PATH_INQ;
3858         xpt_action((union ccb *)&cpi);
3859
3860         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3861                 switch (cpi.transport) {
3862                 case XPORT_SPI:
3863                 case XPORT_SAS:
3864                 case XPORT_FC:
3865                 case XPORT_USB:
3866                 case XPORT_ISCSI:
3867                 case XPORT_SRP:
3868                 case XPORT_PPB:
3869                         new_bus->xport = scsi_get_xport();
3870                         break;
3871                 case XPORT_ATA:
3872                 case XPORT_SATA:
3873                         new_bus->xport = ata_get_xport();
3874                         break;
3875                 default:
3876                         new_bus->xport = &xport_default;
3877                         break;
3878                 }
3879         }
3880
3881         /* Notify interested parties */
3882         if (sim->path_id != CAM_XPT_PATH_ID) {
3883
3884                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3885                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3886                         union   ccb *scan_ccb;
3887
3888                         /* Initiate bus rescan. */
3889                         scan_ccb = xpt_alloc_ccb_nowait();
3890                         if (scan_ccb != NULL) {
3891                                 scan_ccb->ccb_h.path = path;
3892                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3893                                 scan_ccb->crcn.flags = 0;
3894                                 xpt_rescan(scan_ccb);
3895                         } else {
3896                                 xpt_print(path,
3897                                           "Can't allocate CCB to scan bus\n");
3898                                 xpt_free_path(path);
3899                         }
3900                 } else
3901                         xpt_free_path(path);
3902         } else
3903                 xpt_free_path(path);
3904         return (CAM_SUCCESS);
3905 }
3906
3907 int32_t
3908 xpt_bus_deregister(path_id_t pathid)
3909 {
3910         struct cam_path bus_path;
3911         cam_status status;
3912
3913         status = xpt_compile_path(&bus_path, NULL, pathid,
3914                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3915         if (status != CAM_REQ_CMP)
3916                 return (status);
3917
3918         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3919         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3920
3921         /* Release the reference count held while registered. */
3922         xpt_release_bus(bus_path.bus);
3923         xpt_release_path(&bus_path);
3924
3925         return (CAM_REQ_CMP);
3926 }
3927
3928 static path_id_t
3929 xptnextfreepathid(void)
3930 {
3931         struct cam_eb *bus;
3932         path_id_t pathid;
3933         const char *strval;
3934
3935         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3936         pathid = 0;
3937         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3938 retry:
3939         /* Find an unoccupied pathid */
3940         while (bus != NULL && bus->path_id <= pathid) {
3941                 if (bus->path_id == pathid)
3942                         pathid++;
3943                 bus = TAILQ_NEXT(bus, links);
3944         }
3945
3946         /*
3947          * Ensure that this pathid is not reserved for
3948          * a bus that may be registered in the future.
3949          */
3950         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3951                 ++pathid;
3952                 /* Start the search over */
3953                 goto retry;
3954         }
3955         return (pathid);
3956 }
3957
3958 static path_id_t
3959 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
3960 {
3961         path_id_t pathid;
3962         int i, dunit, val;
3963         char buf[32];
3964         const char *dname;
3965
3966         pathid = CAM_XPT_PATH_ID;
3967         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
3968         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
3969                 return (pathid);
3970         i = 0;
3971         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
3972                 if (strcmp(dname, "scbus")) {
3973                         /* Avoid a bit of foot shooting. */
3974                         continue;
3975                 }
3976                 if (dunit < 0)          /* unwired?! */
3977                         continue;
3978                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
3979                         if (sim_bus == val) {
3980                                 pathid = dunit;
3981                                 break;
3982                         }
3983                 } else if (sim_bus == 0) {
3984                         /* Unspecified matches bus 0 */
3985                         pathid = dunit;
3986                         break;
3987                 } else {
3988                         printf("Ambiguous scbus configuration for %s%d "
3989                                "bus %d, cannot wire down.  The kernel "
3990                                "config entry for scbus%d should "
3991                                "specify a controller bus.\n"
3992                                "Scbus will be assigned dynamically.\n",
3993                                sim_name, sim_unit, sim_bus, dunit);
3994                         break;
3995                 }
3996         }
3997
3998         if (pathid == CAM_XPT_PATH_ID)
3999                 pathid = xptnextfreepathid();
4000         return (pathid);
4001 }
4002
4003 static const char *
4004 xpt_async_string(u_int32_t async_code)
4005 {
4006
4007         switch (async_code) {
4008         case AC_BUS_RESET: return ("AC_BUS_RESET");
4009         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4010         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4011         case AC_SENT_BDR: return ("AC_SENT_BDR");
4012         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4013         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4014         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4015         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4016         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4017         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4018         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4019         case AC_CONTRACT: return ("AC_CONTRACT");
4020         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4021         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4022         }
4023         return ("AC_UNKNOWN");
4024 }
4025
4026 static int
4027 xpt_async_size(u_int32_t async_code)
4028 {
4029
4030         switch (async_code) {
4031         case AC_BUS_RESET: return (0);
4032         case AC_UNSOL_RESEL: return (0);
4033         case AC_SCSI_AEN: return (0);
4034         case AC_SENT_BDR: return (0);
4035         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4036         case AC_PATH_DEREGISTERED: return (0);
4037         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4038         case AC_LOST_DEVICE: return (0);
4039         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4040         case AC_INQ_CHANGED: return (0);
4041         case AC_GETDEV_CHANGED: return (0);
4042         case AC_CONTRACT: return (sizeof(struct ac_contract));
4043         case AC_ADVINFO_CHANGED: return (-1);
4044         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4045         }
4046         return (0);
4047 }
4048
4049 static int
4050 xpt_async_process_dev(struct cam_ed *device, void *arg)
4051 {
4052         union ccb *ccb = arg;
4053         struct cam_path *path = ccb->ccb_h.path;
4054         void *async_arg = ccb->casync.async_arg_ptr;
4055         u_int32_t async_code = ccb->casync.async_code;
4056         int relock;
4057
4058         if (path->device != device
4059          && path->device->lun_id != CAM_LUN_WILDCARD
4060          && device->lun_id != CAM_LUN_WILDCARD)
4061                 return (1);
4062
4063         /*
4064          * The async callback could free the device.
4065          * If it is a broadcast async, it doesn't hold
4066          * device reference, so take our own reference.
4067          */
4068         xpt_acquire_device(device);
4069
4070         /*
4071          * If async for specific device is to be delivered to
4072          * the wildcard client, take the specific device lock.
4073          * XXX: We may need a way for client to specify it.
4074          */
4075         if ((device->lun_id == CAM_LUN_WILDCARD &&
4076              path->device->lun_id != CAM_LUN_WILDCARD) ||
4077             (device->target->target_id == CAM_TARGET_WILDCARD &&
4078              path->target->target_id != CAM_TARGET_WILDCARD) ||
4079             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4080              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4081                 mtx_unlock(&device->device_mtx);
4082                 xpt_path_lock(path);
4083                 relock = 1;
4084         } else
4085                 relock = 0;
4086
4087         (*(device->target->bus->xport->async))(async_code,
4088             device->target->bus, device->target, device, async_arg);
4089         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4090
4091         if (relock) {
4092                 xpt_path_unlock(path);
4093                 mtx_lock(&device->device_mtx);
4094         }
4095         xpt_release_device(device);
4096         return (1);
4097 }
4098
4099 static int
4100 xpt_async_process_tgt(struct cam_et *target, void *arg)
4101 {
4102         union ccb *ccb = arg;
4103         struct cam_path *path = ccb->ccb_h.path;
4104
4105         if (path->target != target
4106          && path->target->target_id != CAM_TARGET_WILDCARD
4107          && target->target_id != CAM_TARGET_WILDCARD)
4108                 return (1);
4109
4110         if (ccb->casync.async_code == AC_SENT_BDR) {
4111                 /* Update our notion of when the last reset occurred */
4112                 microtime(&target->last_reset);
4113         }
4114
4115         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4116 }
4117
4118 static void
4119 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4120 {
4121         struct cam_eb *bus;
4122         struct cam_path *path;
4123         void *async_arg;
4124         u_int32_t async_code;
4125
4126         path = ccb->ccb_h.path;
4127         async_code = ccb->casync.async_code;
4128         async_arg = ccb->casync.async_arg_ptr;
4129         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4130             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4131         bus = path->bus;
4132
4133         if (async_code == AC_BUS_RESET) {
4134                 /* Update our notion of when the last reset occurred */
4135                 microtime(&bus->last_reset);
4136         }
4137
4138         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4139
4140         /*
4141          * If this wasn't a fully wildcarded async, tell all
4142          * clients that want all async events.
4143          */
4144         if (bus != xpt_periph->path->bus) {
4145                 xpt_path_lock(xpt_periph->path);
4146                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4147                 xpt_path_unlock(xpt_periph->path);
4148         }
4149
4150         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4151                 xpt_release_devq(path, 1, TRUE);
4152         else
4153                 xpt_release_simq(path->bus->sim, TRUE);
4154         if (ccb->casync.async_arg_size > 0)
4155                 free(async_arg, M_CAMXPT);
4156         xpt_free_path(path);
4157         xpt_free_ccb(ccb);
4158 }
4159
4160 static void
4161 xpt_async_bcast(struct async_list *async_head,
4162                 u_int32_t async_code,
4163                 struct cam_path *path, void *async_arg)
4164 {
4165         struct async_node *cur_entry;
4166         int lock;
4167
4168         cur_entry = SLIST_FIRST(async_head);
4169         while (cur_entry != NULL) {
4170                 struct async_node *next_entry;
4171                 /*
4172                  * Grab the next list entry before we call the current
4173                  * entry's callback.  This is because the callback function
4174                  * can delete its async callback entry.
4175                  */
4176                 next_entry = SLIST_NEXT(cur_entry, links);
4177                 if ((cur_entry->event_enable & async_code) != 0) {
4178                         lock = cur_entry->event_lock;
4179                         if (lock)
4180                                 CAM_SIM_LOCK(path->device->sim);
4181                         cur_entry->callback(cur_entry->callback_arg,
4182                                             async_code, path,
4183                                             async_arg);
4184                         if (lock)
4185                                 CAM_SIM_UNLOCK(path->device->sim);
4186                 }
4187                 cur_entry = next_entry;
4188         }
4189 }
4190
4191 void
4192 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4193 {
4194         union ccb *ccb;
4195         int size;
4196
4197         ccb = xpt_alloc_ccb_nowait();
4198         if (ccb == NULL) {
4199                 xpt_print(path, "Can't allocate CCB to send %s\n",
4200                     xpt_async_string(async_code));
4201                 return;
4202         }
4203
4204         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4205                 xpt_print(path, "Can't allocate path to send %s\n",
4206                     xpt_async_string(async_code));
4207                 xpt_free_ccb(ccb);
4208                 return;
4209         }
4210         ccb->ccb_h.path->periph = NULL;
4211         ccb->ccb_h.func_code = XPT_ASYNC;
4212         ccb->ccb_h.cbfcnp = xpt_async_process;
4213         ccb->ccb_h.flags |= CAM_UNLOCKED;
4214         ccb->casync.async_code = async_code;
4215         ccb->casync.async_arg_size = 0;
4216         size = xpt_async_size(async_code);
4217         if (size > 0 && async_arg != NULL) {
4218                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4219                 if (ccb->casync.async_arg_ptr == NULL) {
4220                         xpt_print(path, "Can't allocate argument to send %s\n",
4221                             xpt_async_string(async_code));
4222                         xpt_free_path(ccb->ccb_h.path);
4223                         xpt_free_ccb(ccb);
4224                         return;
4225                 }
4226                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4227                 ccb->casync.async_arg_size = size;
4228         } else if (size < 0) {
4229                 ccb->casync.async_arg_ptr = async_arg;
4230                 ccb->casync.async_arg_size = size;
4231         }
4232         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4233                 xpt_freeze_devq(path, 1);
4234         else
4235                 xpt_freeze_simq(path->bus->sim, 1);
4236         xpt_done(ccb);
4237 }
4238
4239 static void
4240 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4241                       struct cam_et *target, struct cam_ed *device,
4242                       void *async_arg)
4243 {
4244
4245         /*
4246          * We only need to handle events for real devices.
4247          */
4248         if (target->target_id == CAM_TARGET_WILDCARD
4249          || device->lun_id == CAM_LUN_WILDCARD)
4250                 return;
4251
4252         printf("%s called\n", __func__);
4253 }
4254
4255 static uint32_t
4256 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4257 {
4258         struct cam_devq *devq;
4259         uint32_t freeze;
4260
4261         devq = dev->sim->devq;
4262         mtx_assert(&devq->send_mtx, MA_OWNED);
4263         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4264             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4265             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4266         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4267         /* Remove frozen device from sendq. */
4268         if (device_is_queued(dev))
4269                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4270         return (freeze);
4271 }
4272
4273 u_int32_t
4274 xpt_freeze_devq(struct cam_path *path, u_int count)
4275 {
4276         struct cam_ed   *dev = path->device;
4277         struct cam_devq *devq;
4278         uint32_t         freeze;
4279
4280         devq = dev->sim->devq;
4281         mtx_lock(&devq->send_mtx);
4282         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4283         freeze = xpt_freeze_devq_device(dev, count);
4284         mtx_unlock(&devq->send_mtx);
4285         return (freeze);
4286 }
4287
4288 u_int32_t
4289 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4290 {
4291         struct cam_devq *devq;
4292         uint32_t         freeze;
4293
4294         devq = sim->devq;
4295         mtx_lock(&devq->send_mtx);
4296         freeze = (devq->send_queue.qfrozen_cnt += count);
4297         mtx_unlock(&devq->send_mtx);
4298         return (freeze);
4299 }
4300
4301 static void
4302 xpt_release_devq_timeout(void *arg)
4303 {
4304         struct cam_ed *dev;
4305         struct cam_devq *devq;
4306
4307         dev = (struct cam_ed *)arg;
4308         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4309         devq = dev->sim->devq;
4310         mtx_assert(&devq->send_mtx, MA_OWNED);
4311         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4312                 xpt_run_devq(devq);
4313 }
4314
4315 void
4316 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4317 {
4318         struct cam_ed *dev;
4319         struct cam_devq *devq;
4320
4321         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4322             count, run_queue));
4323         dev = path->device;
4324         devq = dev->sim->devq;
4325         mtx_lock(&devq->send_mtx);
4326         if (xpt_release_devq_device(dev, count, run_queue))
4327                 xpt_run_devq(dev->sim->devq);
4328         mtx_unlock(&devq->send_mtx);
4329 }
4330
4331 static int
4332 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4333 {
4334
4335         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4336         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4337             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4338             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4339         if (count > dev->ccbq.queue.qfrozen_cnt) {
4340 #ifdef INVARIANTS
4341                 printf("xpt_release_devq(): requested %u > present %u\n",
4342                     count, dev->ccbq.queue.qfrozen_cnt);
4343 #endif
4344                 count = dev->ccbq.queue.qfrozen_cnt;
4345         }
4346         dev->ccbq.queue.qfrozen_cnt -= count;
4347         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4348                 /*
4349                  * No longer need to wait for a successful
4350                  * command completion.
4351                  */
4352                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4353                 /*
4354                  * Remove any timeouts that might be scheduled
4355                  * to release this queue.
4356                  */
4357                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4358                         callout_stop(&dev->callout);
4359                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4360                 }
4361                 /*
4362                  * Now that we are unfrozen schedule the
4363                  * device so any pending transactions are
4364                  * run.
4365                  */
4366                 xpt_schedule_devq(dev->sim->devq, dev);
4367         } else
4368                 run_queue = 0;
4369         return (run_queue);
4370 }
4371
4372 void
4373 xpt_release_simq(struct cam_sim *sim, int run_queue)
4374 {
4375         struct cam_devq *devq;
4376
4377         devq = sim->devq;
4378         mtx_lock(&devq->send_mtx);
4379         if (devq->send_queue.qfrozen_cnt <= 0) {
4380 #ifdef INVARIANTS
4381                 printf("xpt_release_simq: requested 1 > present %u\n",
4382                     devq->send_queue.qfrozen_cnt);
4383 #endif
4384         } else
4385                 devq->send_queue.qfrozen_cnt--;
4386         if (devq->send_queue.qfrozen_cnt == 0) {
4387                 /*
4388                  * If there is a timeout scheduled to release this
4389                  * sim queue, remove it.  The queue frozen count is
4390                  * already at 0.
4391                  */
4392                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4393                         callout_stop(&sim->callout);
4394                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4395                 }
4396                 if (run_queue) {
4397                         /*
4398                          * Now that we are unfrozen run the send queue.
4399                          */
4400                         xpt_run_devq(sim->devq);
4401                 }
4402         }
4403         mtx_unlock(&devq->send_mtx);
4404 }
4405
4406 /*
4407  * XXX Appears to be unused.
4408  */
4409 static void
4410 xpt_release_simq_timeout(void *arg)
4411 {
4412         struct cam_sim *sim;
4413
4414         sim = (struct cam_sim *)arg;
4415         xpt_release_simq(sim, /* run_queue */ TRUE);
4416 }
4417
4418 void
4419 xpt_done(union ccb *done_ccb)
4420 {
4421         struct cam_doneq *queue;
4422         int     run, hash;
4423
4424         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4425         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4426                 return;
4427
4428         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4429             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4430         queue = &cam_doneqs[hash];
4431         mtx_lock(&queue->cam_doneq_mtx);
4432         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4433         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4434         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4435         mtx_unlock(&queue->cam_doneq_mtx);
4436         if (run)
4437                 wakeup(&queue->cam_doneq);
4438 }
4439
4440 void
4441 xpt_done_direct(union ccb *done_ccb)
4442 {
4443
4444         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4445         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4446                 return;
4447
4448         xpt_done_process(&done_ccb->ccb_h);
4449 }
4450
4451 union ccb *
4452 xpt_alloc_ccb()
4453 {
4454         union ccb *new_ccb;
4455
4456         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4457         return (new_ccb);
4458 }
4459
4460 union ccb *
4461 xpt_alloc_ccb_nowait()
4462 {
4463         union ccb *new_ccb;
4464
4465         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4466         return (new_ccb);
4467 }
4468
4469 void
4470 xpt_free_ccb(union ccb *free_ccb)
4471 {
4472         free(free_ccb, M_CAMCCB);
4473 }
4474
4475
4476
4477 /* Private XPT functions */
4478
4479 /*
4480  * Get a CAM control block for the caller. Charge the structure to the device
4481  * referenced by the path.  If we don't have sufficient resources to allocate
4482  * more ccbs, we return NULL.
4483  */
4484 static union ccb *
4485 xpt_get_ccb_nowait(struct cam_periph *periph)
4486 {
4487         union ccb *new_ccb;
4488
4489         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4490         if (new_ccb == NULL)
4491                 return (NULL);
4492         periph->periph_allocated++;
4493         cam_ccbq_take_opening(&periph->path->device->ccbq);
4494         return (new_ccb);
4495 }
4496
4497 static union ccb *
4498 xpt_get_ccb(struct cam_periph *periph)
4499 {
4500         union ccb *new_ccb;
4501
4502         cam_periph_unlock(periph);
4503         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4504         cam_periph_lock(periph);
4505         periph->periph_allocated++;
4506         cam_ccbq_take_opening(&periph->path->device->ccbq);
4507         return (new_ccb);
4508 }
4509
4510 union ccb *
4511 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4512 {
4513         struct ccb_hdr *ccb_h;
4514
4515         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4516         cam_periph_assert(periph, MA_OWNED);
4517         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4518             ccb_h->pinfo.priority != priority) {
4519                 if (priority < periph->immediate_priority) {
4520                         periph->immediate_priority = priority;
4521                         xpt_run_allocq(periph, 0);
4522                 } else
4523                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4524                             "cgticb", 0);
4525         }
4526         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4527         return ((union ccb *)ccb_h);
4528 }
4529
4530 static void
4531 xpt_acquire_bus(struct cam_eb *bus)
4532 {
4533
4534         xpt_lock_buses();
4535         bus->refcount++;
4536         xpt_unlock_buses();
4537 }
4538
4539 static void
4540 xpt_release_bus(struct cam_eb *bus)
4541 {
4542
4543         xpt_lock_buses();
4544         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4545         if (--bus->refcount > 0) {
4546                 xpt_unlock_buses();
4547                 return;
4548         }
4549         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4550         xsoftc.bus_generation++;
4551         xpt_unlock_buses();
4552         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4553             ("destroying bus, but target list is not empty"));
4554         cam_sim_release(bus->sim);
4555         mtx_destroy(&bus->eb_mtx);
4556         free(bus, M_CAMXPT);
4557 }
4558
4559 static struct cam_et *
4560 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4561 {
4562         struct cam_et *cur_target, *target;
4563
4564         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4565         mtx_assert(&bus->eb_mtx, MA_OWNED);
4566         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4567                                          M_NOWAIT|M_ZERO);
4568         if (target == NULL)
4569                 return (NULL);
4570
4571         TAILQ_INIT(&target->ed_entries);
4572         target->bus = bus;
4573         target->target_id = target_id;
4574         target->refcount = 1;
4575         target->generation = 0;
4576         target->luns = NULL;
4577         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4578         timevalclear(&target->last_reset);
4579         /*
4580          * Hold a reference to our parent bus so it
4581          * will not go away before we do.
4582          */
4583         bus->refcount++;
4584
4585         /* Insertion sort into our bus's target list */
4586         cur_target = TAILQ_FIRST(&bus->et_entries);
4587         while (cur_target != NULL && cur_target->target_id < target_id)
4588                 cur_target = TAILQ_NEXT(cur_target, links);
4589         if (cur_target != NULL) {
4590                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4591         } else {
4592                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4593         }
4594         bus->generation++;
4595         return (target);
4596 }
4597
4598 static void
4599 xpt_acquire_target(struct cam_et *target)
4600 {
4601         struct cam_eb *bus = target->bus;
4602
4603         mtx_lock(&bus->eb_mtx);
4604         target->refcount++;
4605         mtx_unlock(&bus->eb_mtx);
4606 }
4607
4608 static void
4609 xpt_release_target(struct cam_et *target)
4610 {
4611         struct cam_eb *bus = target->bus;
4612
4613         mtx_lock(&bus->eb_mtx);
4614         if (--target->refcount > 0) {
4615                 mtx_unlock(&bus->eb_mtx);
4616                 return;
4617         }
4618         TAILQ_REMOVE(&bus->et_entries, target, links);
4619         bus->generation++;
4620         mtx_unlock(&bus->eb_mtx);
4621         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4622             ("destroying target, but device list is not empty"));
4623         xpt_release_bus(bus);
4624         mtx_destroy(&target->luns_mtx);
4625         if (target->luns)
4626                 free(target->luns, M_CAMXPT);
4627         free(target, M_CAMXPT);
4628 }
4629
4630 static struct cam_ed *
4631 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4632                          lun_id_t lun_id)
4633 {
4634         struct cam_ed *device;
4635
4636         device = xpt_alloc_device(bus, target, lun_id);
4637         if (device == NULL)
4638                 return (NULL);
4639
4640         device->mintags = 1;
4641         device->maxtags = 1;
4642         return (device);
4643 }
4644
4645 static void
4646 xpt_destroy_device(void *context, int pending)
4647 {
4648         struct cam_ed   *device = context;
4649
4650         mtx_lock(&device->device_mtx);
4651         mtx_destroy(&device->device_mtx);
4652         free(device, M_CAMDEV);
4653 }
4654
4655 struct cam_ed *
4656 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4657 {
4658         struct cam_ed   *cur_device, *device;
4659         struct cam_devq *devq;
4660         cam_status status;
4661
4662         mtx_assert(&bus->eb_mtx, MA_OWNED);
4663         /* Make space for us in the device queue on our bus */
4664         devq = bus->sim->devq;
4665         mtx_lock(&devq->send_mtx);
4666         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4667         mtx_unlock(&devq->send_mtx);
4668         if (status != CAM_REQ_CMP)
4669                 return (NULL);
4670
4671         device = (struct cam_ed *)malloc(sizeof(*device),
4672                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4673         if (device == NULL)
4674                 return (NULL);
4675
4676         cam_init_pinfo(&device->devq_entry);
4677         device->target = target;
4678         device->lun_id = lun_id;
4679         device->sim = bus->sim;
4680         if (cam_ccbq_init(&device->ccbq,
4681                           bus->sim->max_dev_openings) != 0) {
4682                 free(device, M_CAMDEV);
4683                 return (NULL);
4684         }
4685         SLIST_INIT(&device->asyncs);
4686         SLIST_INIT(&device->periphs);
4687         device->generation = 0;
4688         device->flags = CAM_DEV_UNCONFIGURED;
4689         device->tag_delay_count = 0;
4690         device->tag_saved_openings = 0;
4691         device->refcount = 1;
4692         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4693         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4694         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4695         /*
4696          * Hold a reference to our parent bus so it
4697          * will not go away before we do.
4698          */
4699         target->refcount++;
4700
4701         cur_device = TAILQ_FIRST(&target->ed_entries);
4702         while (cur_device != NULL && cur_device->lun_id < lun_id)
4703                 cur_device = TAILQ_NEXT(cur_device, links);
4704         if (cur_device != NULL)
4705                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4706         else
4707                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4708         target->generation++;
4709         return (device);
4710 }
4711
4712 void
4713 xpt_acquire_device(struct cam_ed *device)
4714 {
4715         struct cam_eb *bus = device->target->bus;
4716
4717         mtx_lock(&bus->eb_mtx);
4718         device->refcount++;
4719         mtx_unlock(&bus->eb_mtx);
4720 }
4721
4722 void
4723 xpt_release_device(struct cam_ed *device)
4724 {
4725         struct cam_eb *bus = device->target->bus;
4726         struct cam_devq *devq;
4727
4728         mtx_lock(&bus->eb_mtx);
4729         if (--device->refcount > 0) {
4730                 mtx_unlock(&bus->eb_mtx);
4731                 return;
4732         }
4733
4734         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4735         device->target->generation++;
4736         mtx_unlock(&bus->eb_mtx);
4737
4738         /* Release our slot in the devq */
4739         devq = bus->sim->devq;
4740         mtx_lock(&devq->send_mtx);
4741         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4742         mtx_unlock(&devq->send_mtx);
4743
4744         KASSERT(SLIST_EMPTY(&device->periphs),
4745             ("destroying device, but periphs list is not empty"));
4746         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4747             ("destroying device while still queued for ccbs"));
4748
4749         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4750                 callout_stop(&device->callout);
4751
4752         xpt_release_target(device->target);
4753
4754         cam_ccbq_fini(&device->ccbq);
4755         /*
4756          * Free allocated memory.  free(9) does nothing if the
4757          * supplied pointer is NULL, so it is safe to call without
4758          * checking.
4759          */
4760         free(device->supported_vpds, M_CAMXPT);
4761         free(device->device_id, M_CAMXPT);
4762         free(device->ext_inq, M_CAMXPT);
4763         free(device->physpath, M_CAMXPT);
4764         free(device->rcap_buf, M_CAMXPT);
4765         free(device->serial_num, M_CAMXPT);
4766         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4767 }
4768
4769 u_int32_t
4770 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4771 {
4772         int     result;
4773         struct  cam_ed *dev;
4774
4775         dev = path->device;
4776         mtx_lock(&dev->sim->devq->send_mtx);
4777         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4778         mtx_unlock(&dev->sim->devq->send_mtx);
4779         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4780          || (dev->inq_flags & SID_CmdQue) != 0)
4781                 dev->tag_saved_openings = newopenings;
4782         return (result);
4783 }
4784
4785 static struct cam_eb *
4786 xpt_find_bus(path_id_t path_id)
4787 {
4788         struct cam_eb *bus;
4789
4790         xpt_lock_buses();
4791         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4792              bus != NULL;
4793              bus = TAILQ_NEXT(bus, links)) {
4794                 if (bus->path_id == path_id) {
4795                         bus->refcount++;
4796                         break;
4797                 }
4798         }
4799         xpt_unlock_buses();
4800         return (bus);
4801 }
4802
4803 static struct cam_et *
4804 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4805 {
4806         struct cam_et *target;
4807
4808         mtx_assert(&bus->eb_mtx, MA_OWNED);
4809         for (target = TAILQ_FIRST(&bus->et_entries);
4810              target != NULL;
4811              target = TAILQ_NEXT(target, links)) {
4812                 if (target->target_id == target_id) {
4813                         target->refcount++;
4814                         break;
4815                 }
4816         }
4817         return (target);
4818 }
4819
4820 static struct cam_ed *
4821 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4822 {
4823         struct cam_ed *device;
4824
4825         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4826         for (device = TAILQ_FIRST(&target->ed_entries);
4827              device != NULL;
4828              device = TAILQ_NEXT(device, links)) {
4829                 if (device->lun_id == lun_id) {
4830                         device->refcount++;
4831                         break;
4832                 }
4833         }
4834         return (device);
4835 }
4836
4837 void
4838 xpt_start_tags(struct cam_path *path)
4839 {
4840         struct ccb_relsim crs;
4841         struct cam_ed *device;
4842         struct cam_sim *sim;
4843         int    newopenings;
4844
4845         device = path->device;
4846         sim = path->bus->sim;
4847         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4848         xpt_freeze_devq(path, /*count*/1);
4849         device->inq_flags |= SID_CmdQue;
4850         if (device->tag_saved_openings != 0)
4851                 newopenings = device->tag_saved_openings;
4852         else
4853                 newopenings = min(device->maxtags,
4854                                   sim->max_tagged_dev_openings);
4855         xpt_dev_ccbq_resize(path, newopenings);
4856         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4857         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4858         crs.ccb_h.func_code = XPT_REL_SIMQ;
4859         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4860         crs.openings
4861             = crs.release_timeout
4862             = crs.qfrozen_cnt
4863             = 0;
4864         xpt_action((union ccb *)&crs);
4865 }
4866
4867 void
4868 xpt_stop_tags(struct cam_path *path)
4869 {
4870         struct ccb_relsim crs;
4871         struct cam_ed *device;
4872         struct cam_sim *sim;
4873
4874         device = path->device;
4875         sim = path->bus->sim;
4876         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4877         device->tag_delay_count = 0;
4878         xpt_freeze_devq(path, /*count*/1);
4879         device->inq_flags &= ~SID_CmdQue;
4880         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4881         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4882         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4883         crs.ccb_h.func_code = XPT_REL_SIMQ;
4884         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4885         crs.openings
4886             = crs.release_timeout
4887             = crs.qfrozen_cnt
4888             = 0;
4889         xpt_action((union ccb *)&crs);
4890 }
4891
4892 static void
4893 xpt_boot_delay(void *arg)
4894 {
4895
4896         xpt_release_boot();
4897 }
4898
4899 static void
4900 xpt_config(void *arg)
4901 {
4902         /*
4903          * Now that interrupts are enabled, go find our devices
4904          */
4905         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4906                 printf("xpt_config: failed to create taskqueue thread.\n");
4907
4908         /* Setup debugging path */
4909         if (cam_dflags != CAM_DEBUG_NONE) {
4910                 if (xpt_create_path(&cam_dpath, NULL,
4911                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4912                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4913                         printf("xpt_config: xpt_create_path() failed for debug"
4914                                " target %d:%d:%d, debugging disabled\n",
4915                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4916                         cam_dflags = CAM_DEBUG_NONE;
4917                 }
4918         } else
4919                 cam_dpath = NULL;
4920
4921         periphdriver_init(1);
4922         xpt_hold_boot();
4923         callout_init(&xsoftc.boot_callout, 1);
4924         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4925             xpt_boot_delay, NULL, 0);
4926         /* Fire up rescan thread. */
4927         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4928             "cam", "scanner")) {
4929                 printf("xpt_config: failed to create rescan thread.\n");
4930         }
4931 }
4932
4933 void
4934 xpt_hold_boot(void)
4935 {
4936         xpt_lock_buses();
4937         xsoftc.buses_to_config++;
4938         xpt_unlock_buses();
4939 }
4940
4941 void
4942 xpt_release_boot(void)
4943 {
4944         xpt_lock_buses();
4945         xsoftc.buses_to_config--;
4946         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4947                 struct  xpt_task *task;
4948
4949                 xsoftc.buses_config_done = 1;
4950                 xpt_unlock_buses();
4951                 /* Call manually because we don't have any busses */
4952                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4953                 if (task != NULL) {
4954                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4955                         taskqueue_enqueue(taskqueue_thread, &task->task);
4956                 }
4957         } else
4958                 xpt_unlock_buses();
4959 }
4960
4961 /*
4962  * If the given device only has one peripheral attached to it, and if that
4963  * peripheral is the passthrough driver, announce it.  This insures that the
4964  * user sees some sort of announcement for every peripheral in their system.
4965  */
4966 static int
4967 xptpassannouncefunc(struct cam_ed *device, void *arg)
4968 {
4969         struct cam_periph *periph;
4970         int i;
4971
4972         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
4973              periph = SLIST_NEXT(periph, periph_links), i++);
4974
4975         periph = SLIST_FIRST(&device->periphs);
4976         if ((i == 1)
4977          && (strncmp(periph->periph_name, "pass", 4) == 0))
4978                 xpt_announce_periph(periph, NULL);
4979
4980         return(1);
4981 }
4982
4983 static void
4984 xpt_finishconfig_task(void *context, int pending)
4985 {
4986
4987         periphdriver_init(2);
4988         /*
4989          * Check for devices with no "standard" peripheral driver
4990          * attached.  For any devices like that, announce the
4991          * passthrough driver so the user will see something.
4992          */
4993         if (!bootverbose)
4994                 xpt_for_all_devices(xptpassannouncefunc, NULL);
4995
4996         /* Release our hook so that the boot can continue. */
4997         config_intrhook_disestablish(xsoftc.xpt_config_hook);
4998         free(xsoftc.xpt_config_hook, M_CAMXPT);
4999         xsoftc.xpt_config_hook = NULL;
5000
5001         free(context, M_CAMXPT);
5002 }
5003
5004 cam_status
5005 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5006                    struct cam_path *path)
5007 {
5008         struct ccb_setasync csa;
5009         cam_status status;
5010         int xptpath = 0;
5011
5012         if (path == NULL) {
5013                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5014                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5015                 if (status != CAM_REQ_CMP)
5016                         return (status);
5017                 xpt_path_lock(path);
5018                 xptpath = 1;
5019         }
5020
5021         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5022         csa.ccb_h.func_code = XPT_SASYNC_CB;
5023         csa.event_enable = event;
5024         csa.callback = cbfunc;
5025         csa.callback_arg = cbarg;
5026         xpt_action((union ccb *)&csa);
5027         status = csa.ccb_h.status;
5028
5029         if (xptpath) {
5030                 xpt_path_unlock(path);
5031                 xpt_free_path(path);
5032         }
5033
5034         if ((status == CAM_REQ_CMP) &&
5035             (csa.event_enable & AC_FOUND_DEVICE)) {
5036                 /*
5037                  * Get this peripheral up to date with all
5038                  * the currently existing devices.
5039                  */
5040                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5041         }
5042         if ((status == CAM_REQ_CMP) &&
5043             (csa.event_enable & AC_PATH_REGISTERED)) {
5044                 /*
5045                  * Get this peripheral up to date with all
5046                  * the currently existing busses.
5047                  */
5048                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5049         }
5050
5051         return (status);
5052 }
5053
5054 static void
5055 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5056 {
5057         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5058
5059         switch (work_ccb->ccb_h.func_code) {
5060         /* Common cases first */
5061         case XPT_PATH_INQ:              /* Path routing inquiry */
5062         {
5063                 struct ccb_pathinq *cpi;
5064
5065                 cpi = &work_ccb->cpi;
5066                 cpi->version_num = 1; /* XXX??? */
5067                 cpi->hba_inquiry = 0;
5068                 cpi->target_sprt = 0;
5069                 cpi->hba_misc = 0;
5070                 cpi->hba_eng_cnt = 0;
5071                 cpi->max_target = 0;
5072                 cpi->max_lun = 0;
5073                 cpi->initiator_id = 0;
5074                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5075                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5076                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5077                 cpi->unit_number = sim->unit_number;
5078                 cpi->bus_id = sim->bus_id;
5079                 cpi->base_transfer_speed = 0;
5080                 cpi->protocol = PROTO_UNSPECIFIED;
5081                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5082                 cpi->transport = XPORT_UNSPECIFIED;
5083                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5084                 cpi->ccb_h.status = CAM_REQ_CMP;
5085                 xpt_done(work_ccb);
5086                 break;
5087         }
5088         default:
5089                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5090                 xpt_done(work_ccb);
5091                 break;
5092         }
5093 }
5094
5095 /*
5096  * The xpt as a "controller" has no interrupt sources, so polling
5097  * is a no-op.
5098  */
5099 static void
5100 xptpoll(struct cam_sim *sim)
5101 {
5102 }
5103
5104 void
5105 xpt_lock_buses(void)
5106 {
5107         mtx_lock(&xsoftc.xpt_topo_lock);
5108 }
5109
5110 void
5111 xpt_unlock_buses(void)
5112 {
5113         mtx_unlock(&xsoftc.xpt_topo_lock);
5114 }
5115
5116 struct mtx *
5117 xpt_path_mtx(struct cam_path *path)
5118 {
5119
5120         return (&path->device->device_mtx);
5121 }
5122
5123 static void
5124 xpt_done_process(struct ccb_hdr *ccb_h)
5125 {
5126         struct cam_sim *sim;
5127         struct cam_devq *devq;
5128         struct mtx *mtx = NULL;
5129
5130         if (ccb_h->flags & CAM_HIGH_POWER) {
5131                 struct highpowerlist    *hphead;
5132                 struct cam_ed           *device;
5133
5134                 mtx_lock(&xsoftc.xpt_highpower_lock);
5135                 hphead = &xsoftc.highpowerq;
5136
5137                 device = STAILQ_FIRST(hphead);
5138
5139                 /*
5140                  * Increment the count since this command is done.
5141                  */
5142                 xsoftc.num_highpower++;
5143
5144                 /*
5145                  * Any high powered commands queued up?
5146                  */
5147                 if (device != NULL) {
5148
5149                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5150                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5151
5152                         mtx_lock(&device->sim->devq->send_mtx);
5153                         xpt_release_devq_device(device,
5154                                          /*count*/1, /*runqueue*/TRUE);
5155                         mtx_unlock(&device->sim->devq->send_mtx);
5156                 } else
5157                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5158         }
5159
5160         sim = ccb_h->path->bus->sim;
5161
5162         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5163                 xpt_release_simq(sim, /*run_queue*/FALSE);
5164                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5165         }
5166
5167         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5168          && (ccb_h->status & CAM_DEV_QFRZN)) {
5169                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5170                 ccb_h->status &= ~CAM_DEV_QFRZN;
5171         }
5172
5173         devq = sim->devq;
5174         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5175                 struct cam_ed *dev = ccb_h->path->device;
5176
5177                 mtx_lock(&devq->send_mtx);
5178                 devq->send_active--;
5179                 devq->send_openings++;
5180                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5181
5182                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5183                   && (dev->ccbq.dev_active == 0))) {
5184                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5185                         xpt_release_devq_device(dev, /*count*/1,
5186                                          /*run_queue*/FALSE);
5187                 }
5188
5189                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5190                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5191                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5192                         xpt_release_devq_device(dev, /*count*/1,
5193                                          /*run_queue*/FALSE);
5194                 }
5195
5196                 if (!device_is_queued(dev))
5197                         (void)xpt_schedule_devq(devq, dev);
5198                 xpt_run_devq(devq);
5199                 mtx_unlock(&devq->send_mtx);
5200
5201                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5202                         mtx = xpt_path_mtx(ccb_h->path);
5203                         mtx_lock(mtx);
5204
5205                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5206                          && (--dev->tag_delay_count == 0))
5207                                 xpt_start_tags(ccb_h->path);
5208                 }
5209         }
5210
5211         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5212                 if (mtx == NULL) {
5213                         mtx = xpt_path_mtx(ccb_h->path);
5214                         mtx_lock(mtx);
5215                 }
5216         } else {
5217                 if (mtx != NULL) {
5218                         mtx_unlock(mtx);
5219                         mtx = NULL;
5220                 }
5221         }
5222
5223         /* Call the peripheral driver's callback */
5224         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5225         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5226         if (mtx != NULL)
5227                 mtx_unlock(mtx);
5228 }
5229
5230 void
5231 xpt_done_td(void *arg)
5232 {
5233         struct cam_doneq *queue = arg;
5234         struct ccb_hdr *ccb_h;
5235         STAILQ_HEAD(, ccb_hdr)  doneq;
5236
5237         STAILQ_INIT(&doneq);
5238         mtx_lock(&queue->cam_doneq_mtx);
5239         while (1) {
5240                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5241                         queue->cam_doneq_sleep = 1;
5242                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5243                             PRIBIO, "-", 0);
5244                         queue->cam_doneq_sleep = 0;
5245                 }
5246                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5247                 mtx_unlock(&queue->cam_doneq_mtx);
5248
5249                 THREAD_NO_SLEEPING();
5250                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5251                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5252                         xpt_done_process(ccb_h);
5253                 }
5254                 THREAD_SLEEPING_OK();
5255
5256                 mtx_lock(&queue->cam_doneq_mtx);
5257         }
5258 }
5259
5260 static void
5261 camisr_runqueue(void)
5262 {
5263         struct  ccb_hdr *ccb_h;
5264         struct cam_doneq *queue;
5265         int i;
5266
5267         /* Process global queues. */
5268         for (i = 0; i < cam_num_doneqs; i++) {
5269                 queue = &cam_doneqs[i];
5270                 mtx_lock(&queue->cam_doneq_mtx);
5271                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5272                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5273                         mtx_unlock(&queue->cam_doneq_mtx);
5274                         xpt_done_process(ccb_h);
5275                         mtx_lock(&queue->cam_doneq_mtx);
5276                 }
5277                 mtx_unlock(&queue->cam_doneq_mtx);
5278         }
5279 }