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 const char *     xpt_action_name(uint32_t action);
 313 static __inline int device_is_queued(struct cam_ed *device);
 314
 315 static __inline int
 316 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 317 {
 318         int     retval;
 319
 320         mtx_assert(&devq->send_mtx, MA_OWNED);
 321         if ((dev->ccbq.queue.entries > 0) &&
 322             (dev->ccbq.dev_openings > 0) &&
 323             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 324                 /*
 325                  * The priority of a device waiting for controller
 326                  * resources is that of the highest priority CCB
 327                  * enqueued.
 328                  */
 329                 retval =
 330                     xpt_schedule_dev(&devq->send_queue,
 331                                      &dev->devq_entry,
 332                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 333         } else {
 334                 retval = 0;
 335         }
 336         return (retval);
 337 }
 338
 339 static __inline int
 340 device_is_queued(struct cam_ed *device)
 341 {
 342         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 343 }
 344
 345 static void
 346 xpt_periph_init()
 347 {
 348         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 349 }
 350
 351 static int
 352 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 353 {
 354
 355         /*
 356          * Only allow read-write access.
 357          */
 358         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 359                 return(EPERM);
 360
 361         /*
 362          * We don't allow nonblocking access.
 363          */
 364         if ((flags & O_NONBLOCK) != 0) {
 365                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 366                 return(ENODEV);
 367         }
 368
 369         return(0);
 370 }
 371
 372 static int
 373 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 374 {
 375
 376         return(0);
 377 }
 378
 379 /*
 380  * Don't automatically grab the xpt softc lock here even though this is going
 381  * through the xpt device.  The xpt device is really just a back door for
 382  * accessing other devices and SIMs, so the right thing to do is to grab
 383  * the appropriate SIM lock once the bus/SIM is located.
 384  */
 385 static int
 386 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 387 {
 388         int error;
 389
 390         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 391                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 392         }
 393         return (error);
 394 }
 395
 396 static int
 397 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 398 {
 399         int error;
 400
 401         error = 0;
 402
 403         switch(cmd) {
 404         /*
 405          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 406          * to accept CCB types that don't quite make sense to send through a
 407          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 408          * in the CAM spec.
 409          */
 410         case CAMIOCOMMAND: {
 411                 union ccb *ccb;
 412                 union ccb *inccb;
 413                 struct cam_eb *bus;
 414
 415                 inccb = (union ccb *)addr;
 416
 417                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 418                 if (bus == NULL)
 419                         return (EINVAL);
 420
 421                 switch (inccb->ccb_h.func_code) {
 422                 case XPT_SCAN_BUS:
 423                 case XPT_RESET_BUS:
 424                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 425                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 426                                 xpt_release_bus(bus);
 427                                 return (EINVAL);
 428                         }
 429                         break;
 430                 case XPT_SCAN_TGT:
 431                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 432                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 433                                 xpt_release_bus(bus);
 434                                 return (EINVAL);
 435                         }
 436                         break;
 437                 default:
 438                         break;
 439                 }
 440
 441                 switch(inccb->ccb_h.func_code) {
 442                 case XPT_SCAN_BUS:
 443                 case XPT_RESET_BUS:
 444                 case XPT_PATH_INQ:
 445                 case XPT_ENG_INQ:
 446                 case XPT_SCAN_LUN:
 447                 case XPT_SCAN_TGT:
 448
 449                         ccb = xpt_alloc_ccb();
 450
 451                         /*
 452                          * Create a path using the bus, target, and lun the
 453                          * user passed in.
 454                          */
 455                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 456                                             inccb->ccb_h.path_id,
 457                                             inccb->ccb_h.target_id,
 458                                             inccb->ccb_h.target_lun) !=
 459                                             CAM_REQ_CMP){
 460                                 error = EINVAL;
 461                                 xpt_free_ccb(ccb);
 462                                 break;
 463                         }
 464                         /* Ensure all of our fields are correct */
 465                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 466                                       inccb->ccb_h.pinfo.priority);
 467                         xpt_merge_ccb(ccb, inccb);
 468                         xpt_path_lock(ccb->ccb_h.path);
 469                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 470                         xpt_path_unlock(ccb->ccb_h.path);
 471                         bcopy(ccb, inccb, sizeof(union ccb));
 472                         xpt_free_path(ccb->ccb_h.path);
 473                         xpt_free_ccb(ccb);
 474                         break;
 475
 476                 case XPT_DEBUG: {
 477                         union ccb ccb;
 478
 479                         /*
 480                          * This is an immediate CCB, so it's okay to
 481                          * allocate it on the stack.
 482                          */
 483
 484                         /*
 485                          * Create a path using the bus, target, and lun the
 486                          * user passed in.
 487                          */
 488                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 489                                             inccb->ccb_h.path_id,
 490                                             inccb->ccb_h.target_id,
 491                                             inccb->ccb_h.target_lun) !=
 492                                             CAM_REQ_CMP){
 493                                 error = EINVAL;
 494                                 break;
 495                         }
 496                         /* Ensure all of our fields are correct */
 497                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 498                                       inccb->ccb_h.pinfo.priority);
 499                         xpt_merge_ccb(&ccb, inccb);
 500                         xpt_action(&ccb);
 501                         bcopy(&ccb, inccb, sizeof(union ccb));
 502                         xpt_free_path(ccb.ccb_h.path);
 503                         break;
 504
 505                 }
 506                 case XPT_DEV_MATCH: {
 507                         struct cam_periph_map_info mapinfo;
 508                         struct cam_path *old_path;
 509
 510                         /*
 511                          * We can't deal with physical addresses for this
 512                          * type of transaction.
 513                          */
 514                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 515                             CAM_DATA_VADDR) {
 516                                 error = EINVAL;
 517                                 break;
 518                         }
 519
 520                         /*
 521                          * Save this in case the caller had it set to
 522                          * something in particular.
 523                          */
 524                         old_path = inccb->ccb_h.path;
 525
 526                         /*
 527                          * We really don't need a path for the matching
 528                          * code.  The path is needed because of the
 529                          * debugging statements in xpt_action().  They
 530                          * assume that the CCB has a valid path.
 531                          */
 532                         inccb->ccb_h.path = xpt_periph->path;
 533
 534                         bzero(&mapinfo, sizeof(mapinfo));
 535
 536                         /*
 537                          * Map the pattern and match buffers into kernel
 538                          * virtual address space.
 539                          */
 540                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 541
 542                         if (error) {
 543                                 inccb->ccb_h.path = old_path;
 544                                 break;
 545                         }
 546
 547                         /*
 548                          * This is an immediate CCB, we can send it on directly.
 549                          */
 550                         xpt_action(inccb);
 551
 552                         /*
 553                          * Map the buffers back into user space.
 554                          */
 555                         cam_periph_unmapmem(inccb, &mapinfo);
 556
 557                         inccb->ccb_h.path = old_path;
 558
 559                         error = 0;
 560                         break;
 561                 }
 562                 default:
 563                         error = ENOTSUP;
 564                         break;
 565                 }
 566                 xpt_release_bus(bus);
 567                 break;
 568         }
 569         /*
 570          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 571          * with the periphal driver name and unit name filled in.  The other
 572          * fields don't really matter as input.  The passthrough driver name
 573          * ("pass"), and unit number are passed back in the ccb.  The current
 574          * device generation number, and the index into the device peripheral
 575          * driver list, and the status are also passed back.  Note that
 576          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 577          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 578          * (or rather should be) impossible for the device peripheral driver
 579          * list to change since we look at the whole thing in one pass, and
 580          * we do it with lock protection.
 581          *
 582          */
 583         case CAMGETPASSTHRU: {
 584                 union ccb *ccb;
 585                 struct cam_periph *periph;
 586                 struct periph_driver **p_drv;
 587                 char   *name;
 588                 u_int unit;
 589                 int base_periph_found;
 590
 591                 ccb = (union ccb *)addr;
 592                 unit = ccb->cgdl.unit_number;
 593                 name = ccb->cgdl.periph_name;
 594                 base_periph_found = 0;
 595
 596                 /*
 597                  * Sanity check -- make sure we don't get a null peripheral
 598                  * driver name.
 599                  */
 600                 if (*ccb->cgdl.periph_name == '\0') {
 601                         error = EINVAL;
 602                         break;
 603                 }
 604
 605                 /* Keep the list from changing while we traverse it */
 606                 xpt_lock_buses();
 607
 608                 /* first find our driver in the list of drivers */
 609                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 610                         if (strcmp((*p_drv)->driver_name, name) == 0)
 611                                 break;
 612
 613                 if (*p_drv == NULL) {
 614                         xpt_unlock_buses();
 615                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 616                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 617                         *ccb->cgdl.periph_name = '\0';
 618                         ccb->cgdl.unit_number = 0;
 619                         error = ENOENT;
 620                         break;
 621                 }
 622
 623                 /*
 624                  * Run through every peripheral instance of this driver
 625                  * and check to see whether it matches the unit passed
 626                  * in by the user.  If it does, get out of the loops and
 627                  * find the passthrough driver associated with that
 628                  * peripheral driver.
 629                  */
 630                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 631                      periph = TAILQ_NEXT(periph, unit_links)) {
 632
 633                         if (periph->unit_number == unit)
 634                                 break;
 635                 }
 636                 /*
 637                  * If we found the peripheral driver that the user passed
 638                  * in, go through all of the peripheral drivers for that
 639                  * particular device and look for a passthrough driver.
 640                  */
 641                 if (periph != NULL) {
 642                         struct cam_ed *device;
 643                         int i;
 644
 645                         base_periph_found = 1;
 646                         device = periph->path->device;
 647                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 648                              periph != NULL;
 649                              periph = SLIST_NEXT(periph, periph_links), i++) {
 650                                 /*
 651                                  * Check to see whether we have a
 652                                  * passthrough device or not.
 653                                  */
 654                                 if (strcmp(periph->periph_name, "pass") == 0) {
 655                                         /*
 656                                          * Fill in the getdevlist fields.
 657                                          */
 658                                         strcpy(ccb->cgdl.periph_name,
 659                                                periph->periph_name);
 660                                         ccb->cgdl.unit_number =
 661                                                 periph->unit_number;
 662                                         if (SLIST_NEXT(periph, periph_links))
 663                                                 ccb->cgdl.status =
 664                                                         CAM_GDEVLIST_MORE_DEVS;
 665                                         else
 666                                                 ccb->cgdl.status =
 667                                                        CAM_GDEVLIST_LAST_DEVICE;
 668                                         ccb->cgdl.generation =
 669                                                 device->generation;
 670                                         ccb->cgdl.index = i;
 671                                         /*
 672                                          * Fill in some CCB header fields
 673                                          * that the user may want.
 674                                          */
 675                                         ccb->ccb_h.path_id =
 676                                                 periph->path->bus->path_id;
 677                                         ccb->ccb_h.target_id =
 678                                                 periph->path->target->target_id;
 679                                         ccb->ccb_h.target_lun =
 680                                                 periph->path->device->lun_id;
 681                                         ccb->ccb_h.status = CAM_REQ_CMP;
 682                                         break;
 683                                 }
 684                         }
 685                 }
 686
 687                 /*
 688                  * If the periph is null here, one of two things has
 689                  * happened.  The first possibility is that we couldn't
 690                  * find the unit number of the particular peripheral driver
 691                  * that the user is asking about.  e.g. the user asks for
 692                  * the passthrough driver for "da11".  We find the list of
 693                  * "da" peripherals all right, but there is no unit 11.
 694                  * The other possibility is that we went through the list
 695                  * of peripheral drivers attached to the device structure,
 696                  * but didn't find one with the name "pass".  Either way,
 697                  * we return ENOENT, since we couldn't find something.
 698                  */
 699                 if (periph == NULL) {
 700                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 701                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 702                         *ccb->cgdl.periph_name = '\0';
 703                         ccb->cgdl.unit_number = 0;
 704                         error = ENOENT;
 705                         /*
 706                          * It is unfortunate that this is even necessary,
 707                          * but there are many, many clueless users out there.
 708                          * If this is true, the user is looking for the
 709                          * passthrough driver, but doesn't have one in his
 710                          * kernel.
 711                          */
 712                         if (base_periph_found == 1) {
 713                                 printf("xptioctl: pass driver is not in the "
 714                                        "kernel\n");
 715                                 printf("xptioctl: put \"device pass\" in "
 716                                        "your kernel config file\n");
 717                         }
 718                 }
 719                 xpt_unlock_buses();
 720                 break;
 721                 }
 722         default:
 723                 error = ENOTTY;
 724                 break;
 725         }
 726
 727         return(error);
 728 }
 729
 730 static int
 731 cam_module_event_handler(module_t mod, int what, void *arg)
 732 {
 733         int error;
 734
 735         switch (what) {
 736         case MOD_LOAD:
 737                 if ((error = xpt_init(NULL)) != 0)
 738                         return (error);
 739                 break;
 740         case MOD_UNLOAD:
 741                 return EBUSY;
 742         default:
 743                 return EOPNOTSUPP;
 744         }
 745
 746         return 0;
 747 }
 748
 749 static void
 750 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 751 {
 752
 753         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 754                 xpt_free_path(done_ccb->ccb_h.path);
 755                 xpt_free_ccb(done_ccb);
 756         } else {
 757                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 758                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 759         }
 760         xpt_release_boot();
 761 }
 762
 763 /* thread to handle bus rescans */
 764 static void
 765 xpt_scanner_thread(void *dummy)
 766 {
 767         union ccb       *ccb;
 768         struct cam_path  path;
 769
 770         xpt_lock_buses();
 771         for (;;) {
 772                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 773                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 774                                "-", 0);
 775                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 776                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 777                         xpt_unlock_buses();
 778
 779                         /*
 780                          * Since lock can be dropped inside and path freed
 781                          * by completion callback even before return here,
 782                          * take our own path copy for reference.
 783                          */
 784                         xpt_copy_path(&path, ccb->ccb_h.path);
 785                         xpt_path_lock(&path);
 786                         xpt_action(ccb);
 787                         xpt_path_unlock(&path);
 788                         xpt_release_path(&path);
 789
 790                         xpt_lock_buses();
 791                 }
 792         }
 793 }
 794
 795 void
 796 xpt_rescan(union ccb *ccb)
 797 {
 798         struct ccb_hdr *hdr;
 799
 800         /* Prepare request */
 801         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 802             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 803                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 804         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 805             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 806                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 807         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 808             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 809                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 810         else {
 811                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 812                 xpt_free_path(ccb->ccb_h.path);
 813                 xpt_free_ccb(ccb);
 814                 return;
 815         }
 816         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 817             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 818                 xpt_action_name(ccb->ccb_h.func_code)));
 819
 820         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 821         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 822         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 823         /* Don't make duplicate entries for the same paths. */
 824         xpt_lock_buses();
 825         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 826                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 827                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 828                                 wakeup(&xsoftc.ccb_scanq);
 829                                 xpt_unlock_buses();
 830                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 831                                 xpt_free_path(ccb->ccb_h.path);
 832                                 xpt_free_ccb(ccb);
 833                                 return;
 834                         }
 835                 }
 836         }
 837         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 838         xsoftc.buses_to_config++;
 839         wakeup(&xsoftc.ccb_scanq);
 840         xpt_unlock_buses();
 841 }
 842
 843 /* Functions accessed by the peripheral drivers */
 844 static int
 845 xpt_init(void *dummy)
 846 {
 847         struct cam_sim *xpt_sim;
 848         struct cam_path *path;
 849         struct cam_devq *devq;
 850         cam_status status;
 851         int error, i;
 852
 853         TAILQ_INIT(&xsoftc.xpt_busses);
 854         TAILQ_INIT(&xsoftc.ccb_scanq);
 855         STAILQ_INIT(&xsoftc.highpowerq);
 856         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 857
 858         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 859         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 860         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 861             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 862
 863 #ifdef CAM_BOOT_DELAY
 864         /*
 865          * Override this value at compile time to assist our users
 866          * who don't use loader to boot a kernel.
 867          */
 868         xsoftc.boot_delay = CAM_BOOT_DELAY;
 869 #endif
 870         /*
 871          * The xpt layer is, itself, the equivalent of a SIM.
 872          * Allow 16 ccbs in the ccb pool for it.  This should
 873          * give decent parallelism when we probe busses and
 874          * perform other XPT functions.
 875          */
 876         devq = cam_simq_alloc(16);
 877         xpt_sim = cam_sim_alloc(xptaction,
 878                                 xptpoll,
 879                                 "xpt",
 880                                 /*softc*/NULL,
 881                                 /*unit*/0,
 882                                 /*mtx*/&xsoftc.xpt_lock,
 883                                 /*max_dev_transactions*/0,
 884                                 /*max_tagged_dev_transactions*/0,
 885                                 devq);
 886         if (xpt_sim == NULL)
 887                 return (ENOMEM);
 888
 889         mtx_lock(&xsoftc.xpt_lock);
 890         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 891                 mtx_unlock(&xsoftc.xpt_lock);
 892                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 893                        " failing attach\n", status);
 894                 return (EINVAL);
 895         }
 896         mtx_unlock(&xsoftc.xpt_lock);
 897
 898         /*
 899          * Looking at the XPT from the SIM layer, the XPT is
 900          * the equivalent of a peripheral driver.  Allocate
 901          * a peripheral driver entry for us.
 902          */
 903         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 904                                       CAM_TARGET_WILDCARD,
 905                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 906                 printf("xpt_init: xpt_create_path failed with status %#x,"
 907                        " failing attach\n", status);
 908                 return (EINVAL);
 909         }
 910         xpt_path_lock(path);
 911         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 912                          path, NULL, 0, xpt_sim);
 913         xpt_path_unlock(path);
 914         xpt_free_path(path);
 915
 916         if (cam_num_doneqs < 1)
 917                 cam_num_doneqs = 1 + mp_ncpus / 6;
 918         else if (cam_num_doneqs > MAXCPU)
 919                 cam_num_doneqs = MAXCPU;
 920         for (i = 0; i < cam_num_doneqs; i++) {
 921                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 922                     MTX_DEF);
 923                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 924                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 925                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 926                 if (error != 0) {
 927                         cam_num_doneqs = i;
 928                         break;
 929                 }
 930         }
 931         if (cam_num_doneqs < 1) {
 932                 printf("xpt_init: Cannot init completion queues "
 933                        "- failing attach\n");
 934                 return (ENOMEM);
 935         }
 936         /*
 937          * Register a callback for when interrupts are enabled.
 938          */
 939         xsoftc.xpt_config_hook =
 940             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 941                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 942         if (xsoftc.xpt_config_hook == NULL) {
 943                 printf("xpt_init: Cannot malloc config hook "
 944                        "- failing attach\n");
 945                 return (ENOMEM);
 946         }
 947         xsoftc.xpt_config_hook->ich_func = xpt_config;
 948         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 949                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 950                 printf("xpt_init: config_intrhook_establish failed "
 951                        "- failing attach\n");
 952         }
 953
 954         return (0);
 955 }
 956
 957 static cam_status
 958 xptregister(struct cam_periph *periph, void *arg)
 959 {
 960         struct cam_sim *xpt_sim;
 961
 962         if (periph == NULL) {
 963                 printf("xptregister: periph was NULL!!\n");
 964                 return(CAM_REQ_CMP_ERR);
 965         }
 966
 967         xpt_sim = (struct cam_sim *)arg;
 968         xpt_sim->softc = periph;
 969         xpt_periph = periph;
 970         periph->softc = NULL;
 971
 972         return(CAM_REQ_CMP);
 973 }
 974
 975 int32_t
 976 xpt_add_periph(struct cam_periph *periph)
 977 {
 978         struct cam_ed *device;
 979         int32_t  status;
 980
 981         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
 982         device = periph->path->device;
 983         status = CAM_REQ_CMP;
 984         if (device != NULL) {
 985                 mtx_lock(&device->target->bus->eb_mtx);
 986                 device->generation++;
 987                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
 988                 mtx_unlock(&device->target->bus->eb_mtx);
 989                 atomic_add_32(&xsoftc.xpt_generation, 1);
 990         }
 991
 992         return (status);
 993 }
 994
 995 void
 996 xpt_remove_periph(struct cam_periph *periph)
 997 {
 998         struct cam_ed *device;
 999
1000         device = periph->path->device;
1001         if (device != NULL) {
1002                 mtx_lock(&device->target->bus->eb_mtx);
1003                 device->generation++;
1004                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1005                 mtx_unlock(&device->target->bus->eb_mtx);
1006                 atomic_add_32(&xsoftc.xpt_generation, 1);
1007         }
1008 }
1009
1010
1011 void
1012 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1013 {
1014         struct  cam_path *path = periph->path;
1015
1016         cam_periph_assert(periph, MA_OWNED);
1017         periph->flags |= CAM_PERIPH_ANNOUNCED;
1018
1019         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1020                periph->periph_name, periph->unit_number,
1021                path->bus->sim->sim_name,
1022                path->bus->sim->unit_number,
1023                path->bus->sim->bus_id,
1024                path->bus->path_id,
1025                path->target->target_id,
1026                (uintmax_t)path->device->lun_id);
1027         printf("%s%d: ", periph->periph_name, periph->unit_number);
1028         if (path->device->protocol == PROTO_SCSI)
1029                 scsi_print_inquiry(&path->device->inq_data);
1030         else if (path->device->protocol == PROTO_ATA ||
1031             path->device->protocol == PROTO_SATAPM)
1032                 ata_print_ident(&path->device->ident_data);
1033         else if (path->device->protocol == PROTO_SEMB)
1034                 semb_print_ident(
1035                     (struct sep_identify_data *)&path->device->ident_data);
1036         else
1037                 printf("Unknown protocol device\n");
1038         if (path->device->serial_num_len > 0) {
1039                 /* Don't wrap the screen  - print only the first 60 chars */
1040                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1041                        periph->unit_number, path->device->serial_num);
1042         }
1043         /* Announce transport details. */
1044         (*(path->bus->xport->announce))(periph);
1045         /* Announce command queueing. */
1046         if (path->device->inq_flags & SID_CmdQue
1047          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1048                 printf("%s%d: Command Queueing enabled\n",
1049                        periph->periph_name, periph->unit_number);
1050         }
1051         /* Announce caller's details if they've passed in. */
1052         if (announce_string != NULL)
1053                 printf("%s%d: %s\n", periph->periph_name,
1054                        periph->unit_number, announce_string);
1055 }
1056
1057 void
1058 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1059 {
1060         if (quirks != 0) {
1061                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1062                     periph->unit_number, quirks, bit_string);
1063         }
1064 }
1065
1066 void
1067 xpt_denounce_periph(struct cam_periph *periph)
1068 {
1069         struct  cam_path *path = periph->path;
1070
1071         cam_periph_assert(periph, MA_OWNED);
1072         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1073                periph->periph_name, periph->unit_number,
1074                path->bus->sim->sim_name,
1075                path->bus->sim->unit_number,
1076                path->bus->sim->bus_id,
1077                path->bus->path_id,
1078                path->target->target_id,
1079                (uintmax_t)path->device->lun_id);
1080         printf("%s%d: ", periph->periph_name, periph->unit_number);
1081         if (path->device->protocol == PROTO_SCSI)
1082                 scsi_print_inquiry_short(&path->device->inq_data);
1083         else if (path->device->protocol == PROTO_ATA ||
1084             path->device->protocol == PROTO_SATAPM)
1085                 ata_print_ident_short(&path->device->ident_data);
1086         else if (path->device->protocol == PROTO_SEMB)
1087                 semb_print_ident_short(
1088                     (struct sep_identify_data *)&path->device->ident_data);
1089         else
1090                 printf("Unknown protocol device");
1091         if (path->device->serial_num_len > 0)
1092                 printf(" s/n %.60s", path->device->serial_num);
1093         printf(" detached\n");
1094 }
1095
1096
1097 int
1098 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1099 {
1100         int ret = -1, l;
1101         struct ccb_dev_advinfo cdai;
1102         struct scsi_vpd_id_descriptor *idd;
1103
1104         xpt_path_assert(path, MA_OWNED);
1105
1106         memset(&cdai, 0, sizeof(cdai));
1107         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1108         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1109         cdai.bufsiz = len;
1110
1111         if (!strcmp(attr, "GEOM::ident"))
1112                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1113         else if (!strcmp(attr, "GEOM::physpath"))
1114                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1115         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1116                  strcmp(attr, "GEOM::lunname") == 0) {
1117                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1118                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1119         } else
1120                 goto out;
1121
1122         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1123         if (cdai.buf == NULL) {
1124                 ret = ENOMEM;
1125                 goto out;
1126         }
1127         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1128         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1129                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1130         if (cdai.provsiz == 0)
1131                 goto out;
1132         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1133                 if (strcmp(attr, "GEOM::lunid") == 0) {
1134                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1135                             cdai.provsiz, scsi_devid_is_lun_naa);
1136                         if (idd == NULL)
1137                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1139                 } else
1140                         idd = NULL;
1141                 if (idd == NULL)
1142                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1143                             cdai.provsiz, scsi_devid_is_lun_t10);
1144                 if (idd == NULL)
1145                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1146                             cdai.provsiz, scsi_devid_is_lun_name);
1147                 if (idd == NULL)
1148                         goto out;
1149                 ret = 0;
1150                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1151                         if (idd->length < len) {
1152                                 for (l = 0; l < idd->length; l++)
1153                                         buf[l] = idd->identifier[l] ?
1154                                             idd->identifier[l] : ' ';
1155                                 buf[l] = 0;
1156                         } else
1157                                 ret = EFAULT;
1158                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1159                         l = strnlen(idd->identifier, idd->length);
1160                         if (l < len) {
1161                                 bcopy(idd->identifier, buf, l);
1162                                 buf[l] = 0;
1163                         } else
1164                                 ret = EFAULT;
1165                 } else {
1166                         if (idd->length * 2 < len) {
1167                                 for (l = 0; l < idd->length; l++)
1168                                         sprintf(buf + l * 2, "%02x",
1169                                             idd->identifier[l]);
1170                         } else
1171                                 ret = EFAULT;
1172                 }
1173         } else {
1174                 ret = 0;
1175                 if (strlcpy(buf, cdai.buf, len) >= len)
1176                         ret = EFAULT;
1177         }
1178
1179 out:
1180         if (cdai.buf != NULL)
1181                 free(cdai.buf, M_CAMXPT);
1182         return ret;
1183 }
1184
1185 static dev_match_ret
1186 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1187             struct cam_eb *bus)
1188 {
1189         dev_match_ret retval;
1190         u_int i;
1191
1192         retval = DM_RET_NONE;
1193
1194         /*
1195          * If we aren't given something to match against, that's an error.
1196          */
1197         if (bus == NULL)
1198                 return(DM_RET_ERROR);
1199
1200         /*
1201          * If there are no match entries, then this bus matches no
1202          * matter what.
1203          */
1204         if ((patterns == NULL) || (num_patterns == 0))
1205                 return(DM_RET_DESCEND | DM_RET_COPY);
1206
1207         for (i = 0; i < num_patterns; i++) {
1208                 struct bus_match_pattern *cur_pattern;
1209
1210                 /*
1211                  * If the pattern in question isn't for a bus node, we
1212                  * aren't interested.  However, we do indicate to the
1213                  * calling routine that we should continue descending the
1214                  * tree, since the user wants to match against lower-level
1215                  * EDT elements.
1216                  */
1217                 if (patterns[i].type != DEV_MATCH_BUS) {
1218                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1219                                 retval |= DM_RET_DESCEND;
1220                         continue;
1221                 }
1222
1223                 cur_pattern = &patterns[i].pattern.bus_pattern;
1224
1225                 /*
1226                  * If they want to match any bus node, we give them any
1227                  * device node.
1228                  */
1229                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1230                         /* set the copy flag */
1231                         retval |= DM_RET_COPY;
1232
1233                         /*
1234                          * If we've already decided on an action, go ahead
1235                          * and return.
1236                          */
1237                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1238                                 return(retval);
1239                 }
1240
1241                 /*
1242                  * Not sure why someone would do this...
1243                  */
1244                 if (cur_pattern->flags == BUS_MATCH_NONE)
1245                         continue;
1246
1247                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1248                  && (cur_pattern->path_id != bus->path_id))
1249                         continue;
1250
1251                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1252                  && (cur_pattern->bus_id != bus->sim->bus_id))
1253                         continue;
1254
1255                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1256                  && (cur_pattern->unit_number != bus->sim->unit_number))
1257                         continue;
1258
1259                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1260                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1261                              DEV_IDLEN) != 0))
1262                         continue;
1263
1264                 /*
1265                  * If we get to this point, the user definitely wants
1266                  * information on this bus.  So tell the caller to copy the
1267                  * data out.
1268                  */
1269                 retval |= DM_RET_COPY;
1270
1271                 /*
1272                  * If the return action has been set to descend, then we
1273                  * know that we've already seen a non-bus matching
1274                  * expression, therefore we need to further descend the tree.
1275                  * This won't change by continuing around the loop, so we
1276                  * go ahead and return.  If we haven't seen a non-bus
1277                  * matching expression, we keep going around the loop until
1278                  * we exhaust the matching expressions.  We'll set the stop
1279                  * flag once we fall out of the loop.
1280                  */
1281                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1282                         return(retval);
1283         }
1284
1285         /*
1286          * If the return action hasn't been set to descend yet, that means
1287          * we haven't seen anything other than bus matching patterns.  So
1288          * tell the caller to stop descending the tree -- the user doesn't
1289          * want to match against lower level tree elements.
1290          */
1291         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1292                 retval |= DM_RET_STOP;
1293
1294         return(retval);
1295 }
1296
1297 static dev_match_ret
1298 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1299                struct cam_ed *device)
1300 {
1301         dev_match_ret retval;
1302         u_int i;
1303
1304         retval = DM_RET_NONE;
1305
1306         /*
1307          * If we aren't given something to match against, that's an error.
1308          */
1309         if (device == NULL)
1310                 return(DM_RET_ERROR);
1311
1312         /*
1313          * If there are no match entries, then this device matches no
1314          * matter what.
1315          */
1316         if ((patterns == NULL) || (num_patterns == 0))
1317                 return(DM_RET_DESCEND | DM_RET_COPY);
1318
1319         for (i = 0; i < num_patterns; i++) {
1320                 struct device_match_pattern *cur_pattern;
1321                 struct scsi_vpd_device_id *device_id_page;
1322
1323                 /*
1324                  * If the pattern in question isn't for a device node, we
1325                  * aren't interested.
1326                  */
1327                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1328                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1329                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1330                                 retval |= DM_RET_DESCEND;
1331                         continue;
1332                 }
1333
1334                 cur_pattern = &patterns[i].pattern.device_pattern;
1335
1336                 /* Error out if mutually exclusive options are specified. */
1337                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1338                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1339                         return(DM_RET_ERROR);
1340
1341                 /*
1342                  * If they want to match any device node, we give them any
1343                  * device node.
1344                  */
1345                 if (cur_pattern->flags == DEV_MATCH_ANY)
1346                         goto copy_dev_node;
1347
1348                 /*
1349                  * Not sure why someone would do this...
1350                  */
1351                 if (cur_pattern->flags == DEV_MATCH_NONE)
1352                         continue;
1353
1354                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1355                  && (cur_pattern->path_id != device->target->bus->path_id))
1356                         continue;
1357
1358                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1359                  && (cur_pattern->target_id != device->target->target_id))
1360                         continue;
1361
1362                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1363                  && (cur_pattern->target_lun != device->lun_id))
1364                         continue;
1365
1366                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1367                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1368                                     (caddr_t)&cur_pattern->data.inq_pat,
1369                                     1, sizeof(cur_pattern->data.inq_pat),
1370                                     scsi_static_inquiry_match) == NULL))
1371                         continue;
1372
1373                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1374                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1375                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1376                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1377                                       device->device_id_len
1378                                     - SVPD_DEVICE_ID_HDR_LEN,
1379                                       cur_pattern->data.devid_pat.id,
1380                                       cur_pattern->data.devid_pat.id_len) != 0))
1381                         continue;
1382
1383 copy_dev_node:
1384                 /*
1385                  * If we get to this point, the user definitely wants
1386                  * information on this device.  So tell the caller to copy
1387                  * the data out.
1388                  */
1389                 retval |= DM_RET_COPY;
1390
1391                 /*
1392                  * If the return action has been set to descend, then we
1393                  * know that we've already seen a peripheral matching
1394                  * expression, therefore we need to further descend the tree.
1395                  * This won't change by continuing around the loop, so we
1396                  * go ahead and return.  If we haven't seen a peripheral
1397                  * matching expression, we keep going around the loop until
1398                  * we exhaust the matching expressions.  We'll set the stop
1399                  * flag once we fall out of the loop.
1400                  */
1401                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1402                         return(retval);
1403         }
1404
1405         /*
1406          * If the return action hasn't been set to descend yet, that means
1407          * we haven't seen any peripheral matching patterns.  So tell the
1408          * caller to stop descending the tree -- the user doesn't want to
1409          * match against lower level tree elements.
1410          */
1411         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1412                 retval |= DM_RET_STOP;
1413
1414         return(retval);
1415 }
1416
1417 /*
1418  * Match a single peripheral against any number of match patterns.
1419  */
1420 static dev_match_ret
1421 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1422                struct cam_periph *periph)
1423 {
1424         dev_match_ret retval;
1425         u_int i;
1426
1427         /*
1428          * If we aren't given something to match against, that's an error.
1429          */
1430         if (periph == NULL)
1431                 return(DM_RET_ERROR);
1432
1433         /*
1434          * If there are no match entries, then this peripheral matches no
1435          * matter what.
1436          */
1437         if ((patterns == NULL) || (num_patterns == 0))
1438                 return(DM_RET_STOP | DM_RET_COPY);
1439
1440         /*
1441          * There aren't any nodes below a peripheral node, so there's no
1442          * reason to descend the tree any further.
1443          */
1444         retval = DM_RET_STOP;
1445
1446         for (i = 0; i < num_patterns; i++) {
1447                 struct periph_match_pattern *cur_pattern;
1448
1449                 /*
1450                  * If the pattern in question isn't for a peripheral, we
1451                  * aren't interested.
1452                  */
1453                 if (patterns[i].type != DEV_MATCH_PERIPH)
1454                         continue;
1455
1456                 cur_pattern = &patterns[i].pattern.periph_pattern;
1457
1458                 /*
1459                  * If they want to match on anything, then we will do so.
1460                  */
1461                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1462                         /* set the copy flag */
1463                         retval |= DM_RET_COPY;
1464
1465                         /*
1466                          * We've already set the return action to stop,
1467                          * since there are no nodes below peripherals in
1468                          * the tree.
1469                          */
1470                         return(retval);
1471                 }
1472
1473                 /*
1474                  * Not sure why someone would do this...
1475                  */
1476                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1477                         continue;
1478
1479                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1480                  && (cur_pattern->path_id != periph->path->bus->path_id))
1481                         continue;
1482
1483                 /*
1484                  * For the target and lun id's, we have to make sure the
1485                  * target and lun pointers aren't NULL.  The xpt peripheral
1486                  * has a wildcard target and device.
1487                  */
1488                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1489                  && ((periph->path->target == NULL)
1490                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1491                         continue;
1492
1493                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1494                  && ((periph->path->device == NULL)
1495                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1496                         continue;
1497
1498                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1499                  && (cur_pattern->unit_number != periph->unit_number))
1500                         continue;
1501
1502                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1503                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1504                              DEV_IDLEN) != 0))
1505                         continue;
1506
1507                 /*
1508                  * If we get to this point, the user definitely wants
1509                  * information on this peripheral.  So tell the caller to
1510                  * copy the data out.
1511                  */
1512                 retval |= DM_RET_COPY;
1513
1514                 /*
1515                  * The return action has already been set to stop, since
1516                  * peripherals don't have any nodes below them in the EDT.
1517                  */
1518                 return(retval);
1519         }
1520
1521         /*
1522          * If we get to this point, the peripheral that was passed in
1523          * doesn't match any of the patterns.
1524          */
1525         return(retval);
1526 }
1527
1528 static int
1529 xptedtbusfunc(struct cam_eb *bus, void *arg)
1530 {
1531         struct ccb_dev_match *cdm;
1532         struct cam_et *target;
1533         dev_match_ret retval;
1534
1535         cdm = (struct ccb_dev_match *)arg;
1536
1537         /*
1538          * If our position is for something deeper in the tree, that means
1539          * that we've already seen this node.  So, we keep going down.
1540          */
1541         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1542          && (cdm->pos.cookie.bus == bus)
1543          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1544          && (cdm->pos.cookie.target != NULL))
1545                 retval = DM_RET_DESCEND;
1546         else
1547                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1548
1549         /*
1550          * If we got an error, bail out of the search.
1551          */
1552         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1553                 cdm->status = CAM_DEV_MATCH_ERROR;
1554                 return(0);
1555         }
1556
1557         /*
1558          * If the copy flag is set, copy this bus out.
1559          */
1560         if (retval & DM_RET_COPY) {
1561                 int spaceleft, j;
1562
1563                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1564                         sizeof(struct dev_match_result));
1565
1566                 /*
1567                  * If we don't have enough space to put in another
1568                  * match result, save our position and tell the
1569                  * user there are more devices to check.
1570                  */
1571                 if (spaceleft < sizeof(struct dev_match_result)) {
1572                         bzero(&cdm->pos, sizeof(cdm->pos));
1573                         cdm->pos.position_type =
1574                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1575
1576                         cdm->pos.cookie.bus = bus;
1577                         cdm->pos.generations[CAM_BUS_GENERATION]=
1578                                 xsoftc.bus_generation;
1579                         cdm->status = CAM_DEV_MATCH_MORE;
1580                         return(0);
1581                 }
1582                 j = cdm->num_matches;
1583                 cdm->num_matches++;
1584                 cdm->matches[j].type = DEV_MATCH_BUS;
1585                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1586                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1587                 cdm->matches[j].result.bus_result.unit_number =
1588                         bus->sim->unit_number;
1589                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1590                         bus->sim->sim_name, DEV_IDLEN);
1591         }
1592
1593         /*
1594          * If the user is only interested in busses, there's no
1595          * reason to descend to the next level in the tree.
1596          */
1597         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1598                 return(1);
1599
1600         /*
1601          * If there is a target generation recorded, check it to
1602          * make sure the target list hasn't changed.
1603          */
1604         mtx_lock(&bus->eb_mtx);
1605         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1606          && (cdm->pos.cookie.bus == bus)
1607          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1608          && (cdm->pos.cookie.target != NULL)) {
1609                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1610                     bus->generation)) {
1611                         mtx_unlock(&bus->eb_mtx);
1612                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1613                         return (0);
1614                 }
1615                 target = (struct cam_et *)cdm->pos.cookie.target;
1616                 target->refcount++;
1617         } else
1618                 target = NULL;
1619         mtx_unlock(&bus->eb_mtx);
1620
1621         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1622 }
1623
1624 static int
1625 xptedttargetfunc(struct cam_et *target, void *arg)
1626 {
1627         struct ccb_dev_match *cdm;
1628         struct cam_eb *bus;
1629         struct cam_ed *device;
1630
1631         cdm = (struct ccb_dev_match *)arg;
1632         bus = target->bus;
1633
1634         /*
1635          * If there is a device list generation recorded, check it to
1636          * make sure the device list hasn't changed.
1637          */
1638         mtx_lock(&bus->eb_mtx);
1639         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1640          && (cdm->pos.cookie.bus == bus)
1641          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1642          && (cdm->pos.cookie.target == target)
1643          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1644          && (cdm->pos.cookie.device != NULL)) {
1645                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1646                     target->generation) {
1647                         mtx_unlock(&bus->eb_mtx);
1648                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1649                         return(0);
1650                 }
1651                 device = (struct cam_ed *)cdm->pos.cookie.device;
1652                 device->refcount++;
1653         } else
1654                 device = NULL;
1655         mtx_unlock(&bus->eb_mtx);
1656
1657         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1658 }
1659
1660 static int
1661 xptedtdevicefunc(struct cam_ed *device, void *arg)
1662 {
1663         struct cam_eb *bus;
1664         struct cam_periph *periph;
1665         struct ccb_dev_match *cdm;
1666         dev_match_ret retval;
1667
1668         cdm = (struct ccb_dev_match *)arg;
1669         bus = device->target->bus;
1670
1671         /*
1672          * If our position is for something deeper in the tree, that means
1673          * that we've already seen this node.  So, we keep going down.
1674          */
1675         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1676          && (cdm->pos.cookie.device == device)
1677          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1678          && (cdm->pos.cookie.periph != NULL))
1679                 retval = DM_RET_DESCEND;
1680         else
1681                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1682                                         device);
1683
1684         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1685                 cdm->status = CAM_DEV_MATCH_ERROR;
1686                 return(0);
1687         }
1688
1689         /*
1690          * If the copy flag is set, copy this device out.
1691          */
1692         if (retval & DM_RET_COPY) {
1693                 int spaceleft, j;
1694
1695                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1696                         sizeof(struct dev_match_result));
1697
1698                 /*
1699                  * If we don't have enough space to put in another
1700                  * match result, save our position and tell the
1701                  * user there are more devices to check.
1702                  */
1703                 if (spaceleft < sizeof(struct dev_match_result)) {
1704                         bzero(&cdm->pos, sizeof(cdm->pos));
1705                         cdm->pos.position_type =
1706                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1707                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1708
1709                         cdm->pos.cookie.bus = device->target->bus;
1710                         cdm->pos.generations[CAM_BUS_GENERATION]=
1711                                 xsoftc.bus_generation;
1712                         cdm->pos.cookie.target = device->target;
1713                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1714                                 device->target->bus->generation;
1715                         cdm->pos.cookie.device = device;
1716                         cdm->pos.generations[CAM_DEV_GENERATION] =
1717                                 device->target->generation;
1718                         cdm->status = CAM_DEV_MATCH_MORE;
1719                         return(0);
1720                 }
1721                 j = cdm->num_matches;
1722                 cdm->num_matches++;
1723                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1724                 cdm->matches[j].result.device_result.path_id =
1725                         device->target->bus->path_id;
1726                 cdm->matches[j].result.device_result.target_id =
1727                         device->target->target_id;
1728                 cdm->matches[j].result.device_result.target_lun =
1729                         device->lun_id;
1730                 cdm->matches[j].result.device_result.protocol =
1731                         device->protocol;
1732                 bcopy(&device->inq_data,
1733                       &cdm->matches[j].result.device_result.inq_data,
1734                       sizeof(struct scsi_inquiry_data));
1735                 bcopy(&device->ident_data,
1736                       &cdm->matches[j].result.device_result.ident_data,
1737                       sizeof(struct ata_params));
1738
1739                 /* Let the user know whether this device is unconfigured */
1740                 if (device->flags & CAM_DEV_UNCONFIGURED)
1741                         cdm->matches[j].result.device_result.flags =
1742                                 DEV_RESULT_UNCONFIGURED;
1743                 else
1744                         cdm->matches[j].result.device_result.flags =
1745                                 DEV_RESULT_NOFLAG;
1746         }
1747
1748         /*
1749          * If the user isn't interested in peripherals, don't descend
1750          * the tree any further.
1751          */
1752         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1753                 return(1);
1754
1755         /*
1756          * If there is a peripheral list generation recorded, make sure
1757          * it hasn't changed.
1758          */
1759         xpt_lock_buses();
1760         mtx_lock(&bus->eb_mtx);
1761         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1762          && (cdm->pos.cookie.bus == bus)
1763          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1764          && (cdm->pos.cookie.target == device->target)
1765          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1766          && (cdm->pos.cookie.device == device)
1767          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1768          && (cdm->pos.cookie.periph != NULL)) {
1769                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1770                     device->generation) {
1771                         mtx_unlock(&bus->eb_mtx);
1772                         xpt_unlock_buses();
1773                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1774                         return(0);
1775                 }
1776                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1777                 periph->refcount++;
1778         } else
1779                 periph = NULL;
1780         mtx_unlock(&bus->eb_mtx);
1781         xpt_unlock_buses();
1782
1783         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1784 }
1785
1786 static int
1787 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1788 {
1789         struct ccb_dev_match *cdm;
1790         dev_match_ret retval;
1791
1792         cdm = (struct ccb_dev_match *)arg;
1793
1794         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1795
1796         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1797                 cdm->status = CAM_DEV_MATCH_ERROR;
1798                 return(0);
1799         }
1800
1801         /*
1802          * If the copy flag is set, copy this peripheral out.
1803          */
1804         if (retval & DM_RET_COPY) {
1805                 int spaceleft, j;
1806
1807                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1808                         sizeof(struct dev_match_result));
1809
1810                 /*
1811                  * If we don't have enough space to put in another
1812                  * match result, save our position and tell the
1813                  * user there are more devices to check.
1814                  */
1815                 if (spaceleft < sizeof(struct dev_match_result)) {
1816                         bzero(&cdm->pos, sizeof(cdm->pos));
1817                         cdm->pos.position_type =
1818                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1819                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1820                                 CAM_DEV_POS_PERIPH;
1821
1822                         cdm->pos.cookie.bus = periph->path->bus;
1823                         cdm->pos.generations[CAM_BUS_GENERATION]=
1824                                 xsoftc.bus_generation;
1825                         cdm->pos.cookie.target = periph->path->target;
1826                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1827                                 periph->path->bus->generation;
1828                         cdm->pos.cookie.device = periph->path->device;
1829                         cdm->pos.generations[CAM_DEV_GENERATION] =
1830                                 periph->path->target->generation;
1831                         cdm->pos.cookie.periph = periph;
1832                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1833                                 periph->path->device->generation;
1834                         cdm->status = CAM_DEV_MATCH_MORE;
1835                         return(0);
1836                 }
1837
1838                 j = cdm->num_matches;
1839                 cdm->num_matches++;
1840                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1841                 cdm->matches[j].result.periph_result.path_id =
1842                         periph->path->bus->path_id;
1843                 cdm->matches[j].result.periph_result.target_id =
1844                         periph->path->target->target_id;
1845                 cdm->matches[j].result.periph_result.target_lun =
1846                         periph->path->device->lun_id;
1847                 cdm->matches[j].result.periph_result.unit_number =
1848                         periph->unit_number;
1849                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1850                         periph->periph_name, DEV_IDLEN);
1851         }
1852
1853         return(1);
1854 }
1855
1856 static int
1857 xptedtmatch(struct ccb_dev_match *cdm)
1858 {
1859         struct cam_eb *bus;
1860         int ret;
1861
1862         cdm->num_matches = 0;
1863
1864         /*
1865          * Check the bus list generation.  If it has changed, the user
1866          * needs to reset everything and start over.
1867          */
1868         xpt_lock_buses();
1869         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1870          && (cdm->pos.cookie.bus != NULL)) {
1871                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1872                     xsoftc.bus_generation) {
1873                         xpt_unlock_buses();
1874                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1875                         return(0);
1876                 }
1877                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1878                 bus->refcount++;
1879         } else
1880                 bus = NULL;
1881         xpt_unlock_buses();
1882
1883         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1884
1885         /*
1886          * If we get back 0, that means that we had to stop before fully
1887          * traversing the EDT.  It also means that one of the subroutines
1888          * has set the status field to the proper value.  If we get back 1,
1889          * we've fully traversed the EDT and copied out any matching entries.
1890          */
1891         if (ret == 1)
1892                 cdm->status = CAM_DEV_MATCH_LAST;
1893
1894         return(ret);
1895 }
1896
1897 static int
1898 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1899 {
1900         struct cam_periph *periph;
1901         struct ccb_dev_match *cdm;
1902
1903         cdm = (struct ccb_dev_match *)arg;
1904
1905         xpt_lock_buses();
1906         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1907          && (cdm->pos.cookie.pdrv == pdrv)
1908          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1909          && (cdm->pos.cookie.periph != NULL)) {
1910                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1911                     (*pdrv)->generation) {
1912                         xpt_unlock_buses();
1913                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1914                         return(0);
1915                 }
1916                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1917                 periph->refcount++;
1918         } else
1919                 periph = NULL;
1920         xpt_unlock_buses();
1921
1922         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1923 }
1924
1925 static int
1926 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1927 {
1928         struct ccb_dev_match *cdm;
1929         dev_match_ret retval;
1930
1931         cdm = (struct ccb_dev_match *)arg;
1932
1933         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1934
1935         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1936                 cdm->status = CAM_DEV_MATCH_ERROR;
1937                 return(0);
1938         }
1939
1940         /*
1941          * If the copy flag is set, copy this peripheral out.
1942          */
1943         if (retval & DM_RET_COPY) {
1944                 int spaceleft, j;
1945
1946                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1947                         sizeof(struct dev_match_result));
1948
1949                 /*
1950                  * If we don't have enough space to put in another
1951                  * match result, save our position and tell the
1952                  * user there are more devices to check.
1953                  */
1954                 if (spaceleft < sizeof(struct dev_match_result)) {
1955                         struct periph_driver **pdrv;
1956
1957                         pdrv = NULL;
1958                         bzero(&cdm->pos, sizeof(cdm->pos));
1959                         cdm->pos.position_type =
1960                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1961                                 CAM_DEV_POS_PERIPH;
1962
1963                         /*
1964                          * This may look a bit non-sensical, but it is
1965                          * actually quite logical.  There are very few
1966                          * peripheral drivers, and bloating every peripheral
1967                          * structure with a pointer back to its parent
1968                          * peripheral driver linker set entry would cost
1969                          * more in the long run than doing this quick lookup.
1970                          */
1971                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1972                                 if (strcmp((*pdrv)->driver_name,
1973                                     periph->periph_name) == 0)
1974                                         break;
1975                         }
1976
1977                         if (*pdrv == NULL) {
1978                                 cdm->status = CAM_DEV_MATCH_ERROR;
1979                                 return(0);
1980                         }
1981
1982                         cdm->pos.cookie.pdrv = pdrv;
1983                         /*
1984                          * The periph generation slot does double duty, as
1985                          * does the periph pointer slot.  They are used for
1986                          * both edt and pdrv lookups and positioning.
1987                          */
1988                         cdm->pos.cookie.periph = periph;
1989                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1990                                 (*pdrv)->generation;
1991                         cdm->status = CAM_DEV_MATCH_MORE;
1992                         return(0);
1993                 }
1994
1995                 j = cdm->num_matches;
1996                 cdm->num_matches++;
1997                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1998                 cdm->matches[j].result.periph_result.path_id =
1999                         periph->path->bus->path_id;
2000
2001                 /*
2002                  * The transport layer peripheral doesn't have a target or
2003                  * lun.
2004                  */
2005                 if (periph->path->target)
2006                         cdm->matches[j].result.periph_result.target_id =
2007                                 periph->path->target->target_id;
2008                 else
2009                         cdm->matches[j].result.periph_result.target_id =
2010                                 CAM_TARGET_WILDCARD;
2011
2012                 if (periph->path->device)
2013                         cdm->matches[j].result.periph_result.target_lun =
2014                                 periph->path->device->lun_id;
2015                 else
2016                         cdm->matches[j].result.periph_result.target_lun =
2017                                 CAM_LUN_WILDCARD;
2018
2019                 cdm->matches[j].result.periph_result.unit_number =
2020                         periph->unit_number;
2021                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2022                         periph->periph_name, DEV_IDLEN);
2023         }
2024
2025         return(1);
2026 }
2027
2028 static int
2029 xptperiphlistmatch(struct ccb_dev_match *cdm)
2030 {
2031         int ret;
2032
2033         cdm->num_matches = 0;
2034
2035         /*
2036          * At this point in the edt traversal function, we check the bus
2037          * list generation to make sure that no busses have been added or
2038          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2039          * For the peripheral driver list traversal function, however, we
2040          * don't have to worry about new peripheral driver types coming or
2041          * going; they're in a linker set, and therefore can't change
2042          * without a recompile.
2043          */
2044
2045         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2046          && (cdm->pos.cookie.pdrv != NULL))
2047                 ret = xptpdrvtraverse(
2048                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2049                                 xptplistpdrvfunc, cdm);
2050         else
2051                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2052
2053         /*
2054          * If we get back 0, that means that we had to stop before fully
2055          * traversing the peripheral driver tree.  It also means that one of
2056          * the subroutines has set the status field to the proper value.  If
2057          * we get back 1, we've fully traversed the EDT and copied out any
2058          * matching entries.
2059          */
2060         if (ret == 1)
2061                 cdm->status = CAM_DEV_MATCH_LAST;
2062
2063         return(ret);
2064 }
2065
2066 static int
2067 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2068 {
2069         struct cam_eb *bus, *next_bus;
2070         int retval;
2071
2072         retval = 1;
2073         if (start_bus)
2074                 bus = start_bus;
2075         else {
2076                 xpt_lock_buses();
2077                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2078                 if (bus == NULL) {
2079                         xpt_unlock_buses();
2080                         return (retval);
2081                 }
2082                 bus->refcount++;
2083                 xpt_unlock_buses();
2084         }
2085         for (; bus != NULL; bus = next_bus) {
2086                 retval = tr_func(bus, arg);
2087                 if (retval == 0) {
2088                         xpt_release_bus(bus);
2089                         break;
2090                 }
2091                 xpt_lock_buses();
2092                 next_bus = TAILQ_NEXT(bus, links);
2093                 if (next_bus)
2094                         next_bus->refcount++;
2095                 xpt_unlock_buses();
2096                 xpt_release_bus(bus);
2097         }
2098         return(retval);
2099 }
2100
2101 static int
2102 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2103                   xpt_targetfunc_t *tr_func, void *arg)
2104 {
2105         struct cam_et *target, *next_target;
2106         int retval;
2107
2108         retval = 1;
2109         if (start_target)
2110                 target = start_target;
2111         else {
2112                 mtx_lock(&bus->eb_mtx);
2113                 target = TAILQ_FIRST(&bus->et_entries);
2114                 if (target == NULL) {
2115                         mtx_unlock(&bus->eb_mtx);
2116                         return (retval);
2117                 }
2118                 target->refcount++;
2119                 mtx_unlock(&bus->eb_mtx);
2120         }
2121         for (; target != NULL; target = next_target) {
2122                 retval = tr_func(target, arg);
2123                 if (retval == 0) {
2124                         xpt_release_target(target);
2125                         break;
2126                 }
2127                 mtx_lock(&bus->eb_mtx);
2128                 next_target = TAILQ_NEXT(target, links);
2129                 if (next_target)
2130                         next_target->refcount++;
2131                 mtx_unlock(&bus->eb_mtx);
2132                 xpt_release_target(target);
2133         }
2134         return(retval);
2135 }
2136
2137 static int
2138 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2139                   xpt_devicefunc_t *tr_func, void *arg)
2140 {
2141         struct cam_eb *bus;
2142         struct cam_ed *device, *next_device;
2143         int retval;
2144
2145         retval = 1;
2146         bus = target->bus;
2147         if (start_device)
2148                 device = start_device;
2149         else {
2150                 mtx_lock(&bus->eb_mtx);
2151                 device = TAILQ_FIRST(&target->ed_entries);
2152                 if (device == NULL) {
2153                         mtx_unlock(&bus->eb_mtx);
2154                         return (retval);
2155                 }
2156                 device->refcount++;
2157                 mtx_unlock(&bus->eb_mtx);
2158         }
2159         for (; device != NULL; device = next_device) {
2160                 mtx_lock(&device->device_mtx);
2161                 retval = tr_func(device, arg);
2162                 mtx_unlock(&device->device_mtx);
2163                 if (retval == 0) {
2164                         xpt_release_device(device);
2165                         break;
2166                 }
2167                 mtx_lock(&bus->eb_mtx);
2168                 next_device = TAILQ_NEXT(device, links);
2169                 if (next_device)
2170                         next_device->refcount++;
2171                 mtx_unlock(&bus->eb_mtx);
2172                 xpt_release_device(device);
2173         }
2174         return(retval);
2175 }
2176
2177 static int
2178 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2179                   xpt_periphfunc_t *tr_func, void *arg)
2180 {
2181         struct cam_eb *bus;
2182         struct cam_periph *periph, *next_periph;
2183         int retval;
2184
2185         retval = 1;
2186
2187         bus = device->target->bus;
2188         if (start_periph)
2189                 periph = start_periph;
2190         else {
2191                 xpt_lock_buses();
2192                 mtx_lock(&bus->eb_mtx);
2193                 periph = SLIST_FIRST(&device->periphs);
2194                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2195                         periph = SLIST_NEXT(periph, periph_links);
2196                 if (periph == NULL) {
2197                         mtx_unlock(&bus->eb_mtx);
2198                         xpt_unlock_buses();
2199                         return (retval);
2200                 }
2201                 periph->refcount++;
2202                 mtx_unlock(&bus->eb_mtx);
2203                 xpt_unlock_buses();
2204         }
2205         for (; periph != NULL; periph = next_periph) {
2206                 retval = tr_func(periph, arg);
2207                 if (retval == 0) {
2208                         cam_periph_release_locked(periph);
2209                         break;
2210                 }
2211                 xpt_lock_buses();
2212                 mtx_lock(&bus->eb_mtx);
2213                 next_periph = SLIST_NEXT(periph, periph_links);
2214                 while (next_periph != NULL &&
2215                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2216                         next_periph = SLIST_NEXT(next_periph, periph_links);
2217                 if (next_periph)
2218                         next_periph->refcount++;
2219                 mtx_unlock(&bus->eb_mtx);
2220                 xpt_unlock_buses();
2221                 cam_periph_release_locked(periph);
2222         }
2223         return(retval);
2224 }
2225
2226 static int
2227 xptpdrvtraverse(struct periph_driver **start_pdrv,
2228                 xpt_pdrvfunc_t *tr_func, void *arg)
2229 {
2230         struct periph_driver **pdrv;
2231         int retval;
2232
2233         retval = 1;
2234
2235         /*
2236          * We don't traverse the peripheral driver list like we do the
2237          * other lists, because it is a linker set, and therefore cannot be
2238          * changed during runtime.  If the peripheral driver list is ever
2239          * re-done to be something other than a linker set (i.e. it can
2240          * change while the system is running), the list traversal should
2241          * be modified to work like the other traversal functions.
2242          */
2243         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2244              *pdrv != NULL; pdrv++) {
2245                 retval = tr_func(pdrv, arg);
2246
2247                 if (retval == 0)
2248                         return(retval);
2249         }
2250
2251         return(retval);
2252 }
2253
2254 static int
2255 xptpdperiphtraverse(struct periph_driver **pdrv,
2256                     struct cam_periph *start_periph,
2257                     xpt_periphfunc_t *tr_func, void *arg)
2258 {
2259         struct cam_periph *periph, *next_periph;
2260         int retval;
2261
2262         retval = 1;
2263
2264         if (start_periph)
2265                 periph = start_periph;
2266         else {
2267                 xpt_lock_buses();
2268                 periph = TAILQ_FIRST(&(*pdrv)->units);
2269                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2270                         periph = TAILQ_NEXT(periph, unit_links);
2271                 if (periph == NULL) {
2272                         xpt_unlock_buses();
2273                         return (retval);
2274                 }
2275                 periph->refcount++;
2276                 xpt_unlock_buses();
2277         }
2278         for (; periph != NULL; periph = next_periph) {
2279                 cam_periph_lock(periph);
2280                 retval = tr_func(periph, arg);
2281                 cam_periph_unlock(periph);
2282                 if (retval == 0) {
2283                         cam_periph_release(periph);
2284                         break;
2285                 }
2286                 xpt_lock_buses();
2287                 next_periph = TAILQ_NEXT(periph, unit_links);
2288                 while (next_periph != NULL &&
2289                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2290                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2291                 if (next_periph)
2292                         next_periph->refcount++;
2293                 xpt_unlock_buses();
2294                 cam_periph_release(periph);
2295         }
2296         return(retval);
2297 }
2298
2299 static int
2300 xptdefbusfunc(struct cam_eb *bus, void *arg)
2301 {
2302         struct xpt_traverse_config *tr_config;
2303
2304         tr_config = (struct xpt_traverse_config *)arg;
2305
2306         if (tr_config->depth == XPT_DEPTH_BUS) {
2307                 xpt_busfunc_t *tr_func;
2308
2309                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2310
2311                 return(tr_func(bus, tr_config->tr_arg));
2312         } else
2313                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2314 }
2315
2316 static int
2317 xptdeftargetfunc(struct cam_et *target, void *arg)
2318 {
2319         struct xpt_traverse_config *tr_config;
2320
2321         tr_config = (struct xpt_traverse_config *)arg;
2322
2323         if (tr_config->depth == XPT_DEPTH_TARGET) {
2324                 xpt_targetfunc_t *tr_func;
2325
2326                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2327
2328                 return(tr_func(target, tr_config->tr_arg));
2329         } else
2330                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2331 }
2332
2333 static int
2334 xptdefdevicefunc(struct cam_ed *device, void *arg)
2335 {
2336         struct xpt_traverse_config *tr_config;
2337
2338         tr_config = (struct xpt_traverse_config *)arg;
2339
2340         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2341                 xpt_devicefunc_t *tr_func;
2342
2343                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2344
2345                 return(tr_func(device, tr_config->tr_arg));
2346         } else
2347                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2348 }
2349
2350 static int
2351 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2352 {
2353         struct xpt_traverse_config *tr_config;
2354         xpt_periphfunc_t *tr_func;
2355
2356         tr_config = (struct xpt_traverse_config *)arg;
2357
2358         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2359
2360         /*
2361          * Unlike the other default functions, we don't check for depth
2362          * here.  The peripheral driver level is the last level in the EDT,
2363          * so if we're here, we should execute the function in question.
2364          */
2365         return(tr_func(periph, tr_config->tr_arg));
2366 }
2367
2368 /*
2369  * Execute the given function for every bus in the EDT.
2370  */
2371 static int
2372 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2373 {
2374         struct xpt_traverse_config tr_config;
2375
2376         tr_config.depth = XPT_DEPTH_BUS;
2377         tr_config.tr_func = tr_func;
2378         tr_config.tr_arg = arg;
2379
2380         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2381 }
2382
2383 /*
2384  * Execute the given function for every device in the EDT.
2385  */
2386 static int
2387 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2388 {
2389         struct xpt_traverse_config tr_config;
2390
2391         tr_config.depth = XPT_DEPTH_DEVICE;
2392         tr_config.tr_func = tr_func;
2393         tr_config.tr_arg = arg;
2394
2395         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2396 }
2397
2398 static int
2399 xptsetasyncfunc(struct cam_ed *device, void *arg)
2400 {
2401         struct cam_path path;
2402         struct ccb_getdev cgd;
2403         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2404
2405         /*
2406          * Don't report unconfigured devices (Wildcard devs,
2407          * devices only for target mode, device instances
2408          * that have been invalidated but are waiting for
2409          * their last reference count to be released).
2410          */
2411         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2412                 return (1);
2413
2414         xpt_compile_path(&path,
2415                          NULL,
2416                          device->target->bus->path_id,
2417                          device->target->target_id,
2418                          device->lun_id);
2419         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2420         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2421         xpt_action((union ccb *)&cgd);
2422         csa->callback(csa->callback_arg,
2423                             AC_FOUND_DEVICE,
2424                             &path, &cgd);
2425         xpt_release_path(&path);
2426
2427         return(1);
2428 }
2429
2430 static int
2431 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2432 {
2433         struct cam_path path;
2434         struct ccb_pathinq cpi;
2435         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2436
2437         xpt_compile_path(&path, /*periph*/NULL,
2438                          bus->path_id,
2439                          CAM_TARGET_WILDCARD,
2440                          CAM_LUN_WILDCARD);
2441         xpt_path_lock(&path);
2442         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2443         cpi.ccb_h.func_code = XPT_PATH_INQ;
2444         xpt_action((union ccb *)&cpi);
2445         csa->callback(csa->callback_arg,
2446                             AC_PATH_REGISTERED,
2447                             &path, &cpi);
2448         xpt_path_unlock(&path);
2449         xpt_release_path(&path);
2450
2451         return(1);
2452 }
2453
2454 void
2455 xpt_action(union ccb *start_ccb)
2456 {
2457
2458         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2459             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2460                 xpt_action_name(start_ccb->ccb_h.func_code)));
2461
2462         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2463         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2464 }
2465
2466 void
2467 xpt_action_default(union ccb *start_ccb)
2468 {
2469         struct cam_path *path;
2470         struct cam_sim *sim;
2471         int lock;
2472
2473         path = start_ccb->ccb_h.path;
2474         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2475             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2476                 xpt_action_name(start_ccb->ccb_h.func_code)));
2477
2478         switch (start_ccb->ccb_h.func_code) {
2479         case XPT_SCSI_IO:
2480         {
2481                 struct cam_ed *device;
2482
2483                 /*
2484                  * For the sake of compatibility with SCSI-1
2485                  * devices that may not understand the identify
2486                  * message, we include lun information in the
2487                  * second byte of all commands.  SCSI-1 specifies
2488                  * that luns are a 3 bit value and reserves only 3
2489                  * bits for lun information in the CDB.  Later
2490                  * revisions of the SCSI spec allow for more than 8
2491                  * luns, but have deprecated lun information in the
2492                  * CDB.  So, if the lun won't fit, we must omit.
2493                  *
2494                  * Also be aware that during initial probing for devices,
2495                  * the inquiry information is unknown but initialized to 0.
2496                  * This means that this code will be exercised while probing
2497                  * devices with an ANSI revision greater than 2.
2498                  */
2499                 device = path->device;
2500                 if (device->protocol_version <= SCSI_REV_2
2501                  && start_ccb->ccb_h.target_lun < 8
2502                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2503
2504                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2505                             start_ccb->ccb_h.target_lun << 5;
2506                 }
2507                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2508         }
2509         /* FALLTHROUGH */
2510         case XPT_TARGET_IO:
2511         case XPT_CONT_TARGET_IO:
2512                 start_ccb->csio.sense_resid = 0;
2513                 start_ccb->csio.resid = 0;
2514                 /* FALLTHROUGH */
2515         case XPT_ATA_IO:
2516                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2517                         start_ccb->ataio.resid = 0;
2518                 /* FALLTHROUGH */
2519         case XPT_RESET_DEV:
2520         case XPT_ENG_EXEC:
2521         case XPT_SMP_IO:
2522         {
2523                 struct cam_devq *devq;
2524
2525                 devq = path->bus->sim->devq;
2526                 mtx_lock(&devq->send_mtx);
2527                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2528                 if (xpt_schedule_devq(devq, path->device) != 0)
2529                         xpt_run_devq(devq);
2530                 mtx_unlock(&devq->send_mtx);
2531                 break;
2532         }
2533         case XPT_CALC_GEOMETRY:
2534                 /* Filter out garbage */
2535                 if (start_ccb->ccg.block_size == 0
2536                  || start_ccb->ccg.volume_size == 0) {
2537                         start_ccb->ccg.cylinders = 0;
2538                         start_ccb->ccg.heads = 0;
2539                         start_ccb->ccg.secs_per_track = 0;
2540                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2541                         break;
2542                 }
2543 #if defined(PC98) || defined(__sparc64__)
2544                 /*
2545                  * In a PC-98 system, geometry translation depens on
2546                  * the "real" device geometry obtained from mode page 4.
2547                  * SCSI geometry translation is performed in the
2548                  * initialization routine of the SCSI BIOS and the result
2549                  * stored in host memory.  If the translation is available
2550                  * in host memory, use it.  If not, rely on the default
2551                  * translation the device driver performs.
2552                  * For sparc64, we may need adjust the geometry of large
2553                  * disks in order to fit the limitations of the 16-bit
2554                  * fields of the VTOC8 disk label.
2555                  */
2556                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2557                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2558                         break;
2559                 }
2560 #endif
2561                 goto call_sim;
2562         case XPT_ABORT:
2563         {
2564                 union ccb* abort_ccb;
2565
2566                 abort_ccb = start_ccb->cab.abort_ccb;
2567                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2568
2569                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2570                                 struct cam_ccbq *ccbq;
2571                                 struct cam_ed *device;
2572
2573                                 device = abort_ccb->ccb_h.path->device;
2574                                 ccbq = &device->ccbq;
2575                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2576                                 abort_ccb->ccb_h.status =
2577                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2578                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2579                                 xpt_done(abort_ccb);
2580                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2581                                 break;
2582                         }
2583                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2584                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2585                                 /*
2586                                  * We've caught this ccb en route to
2587                                  * the SIM.  Flag it for abort and the
2588                                  * SIM will do so just before starting
2589                                  * real work on the CCB.
2590                                  */
2591                                 abort_ccb->ccb_h.status =
2592                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2593                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2594                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2595                                 break;
2596                         }
2597                 }
2598                 if (XPT_FC_IS_QUEUED(abort_ccb)
2599                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2600                         /*
2601                          * It's already completed but waiting
2602                          * for our SWI to get to it.
2603                          */
2604                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2605                         break;
2606                 }
2607                 /*
2608                  * If we weren't able to take care of the abort request
2609                  * in the XPT, pass the request down to the SIM for processing.
2610                  */
2611         }
2612         /* FALLTHROUGH */
2613         case XPT_ACCEPT_TARGET_IO:
2614         case XPT_EN_LUN:
2615         case XPT_IMMED_NOTIFY:
2616         case XPT_NOTIFY_ACK:
2617         case XPT_RESET_BUS:
2618         case XPT_IMMEDIATE_NOTIFY:
2619         case XPT_NOTIFY_ACKNOWLEDGE:
2620         case XPT_GET_SIM_KNOB_OLD:
2621         case XPT_GET_SIM_KNOB:
2622         case XPT_SET_SIM_KNOB:
2623         case XPT_GET_TRAN_SETTINGS:
2624         case XPT_SET_TRAN_SETTINGS:
2625         case XPT_PATH_INQ:
2626 call_sim:
2627                 sim = path->bus->sim;
2628                 lock = (mtx_owned(sim->mtx) == 0);
2629                 if (lock)
2630                         CAM_SIM_LOCK(sim);
2631                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2632                     ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
2633                 (*(sim->sim_action))(sim, start_ccb);
2634                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2635                     ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
2636                 if (lock)
2637                         CAM_SIM_UNLOCK(sim);
2638                 break;
2639         case XPT_PATH_STATS:
2640                 start_ccb->cpis.last_reset = path->bus->last_reset;
2641                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2642                 break;
2643         case XPT_GDEV_TYPE:
2644         {
2645                 struct cam_ed *dev;
2646
2647                 dev = path->device;
2648                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2649                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2650                 } else {
2651                         struct ccb_getdev *cgd;
2652
2653                         cgd = &start_ccb->cgd;
2654                         cgd->protocol = dev->protocol;
2655                         cgd->inq_data = dev->inq_data;
2656                         cgd->ident_data = dev->ident_data;
2657                         cgd->inq_flags = dev->inq_flags;
2658                         cgd->ccb_h.status = CAM_REQ_CMP;
2659                         cgd->serial_num_len = dev->serial_num_len;
2660                         if ((dev->serial_num_len > 0)
2661                          && (dev->serial_num != NULL))
2662                                 bcopy(dev->serial_num, cgd->serial_num,
2663                                       dev->serial_num_len);
2664                 }
2665                 break;
2666         }
2667         case XPT_GDEV_STATS:
2668         {
2669                 struct cam_ed *dev;
2670
2671                 dev = path->device;
2672                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2673                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2674                 } else {
2675                         struct ccb_getdevstats *cgds;
2676                         struct cam_eb *bus;
2677                         struct cam_et *tar;
2678                         struct cam_devq *devq;
2679
2680                         cgds = &start_ccb->cgds;
2681                         bus = path->bus;
2682                         tar = path->target;
2683                         devq = bus->sim->devq;
2684                         mtx_lock(&devq->send_mtx);
2685                         cgds->dev_openings = dev->ccbq.dev_openings;
2686                         cgds->dev_active = dev->ccbq.dev_active;
2687                         cgds->allocated = dev->ccbq.allocated;
2688                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2689                         cgds->held = cgds->allocated - cgds->dev_active -
2690                             cgds->queued;
2691                         cgds->last_reset = tar->last_reset;
2692                         cgds->maxtags = dev->maxtags;
2693                         cgds->mintags = dev->mintags;
2694                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2695                                 cgds->last_reset = bus->last_reset;
2696                         mtx_unlock(&devq->send_mtx);
2697                         cgds->ccb_h.status = CAM_REQ_CMP;
2698                 }
2699                 break;
2700         }
2701         case XPT_GDEVLIST:
2702         {
2703                 struct cam_periph       *nperiph;
2704                 struct periph_list      *periph_head;
2705                 struct ccb_getdevlist   *cgdl;
2706                 u_int                   i;
2707                 struct cam_ed           *device;
2708                 int                     found;
2709
2710
2711                 found = 0;
2712
2713                 /*
2714                  * Don't want anyone mucking with our data.
2715                  */
2716                 device = path->device;
2717                 periph_head = &device->periphs;
2718                 cgdl = &start_ccb->cgdl;
2719
2720                 /*
2721                  * Check and see if the list has changed since the user
2722                  * last requested a list member.  If so, tell them that the
2723                  * list has changed, and therefore they need to start over
2724                  * from the beginning.
2725                  */
2726                 if ((cgdl->index != 0) &&
2727                     (cgdl->generation != device->generation)) {
2728                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2729                         break;
2730                 }
2731
2732                 /*
2733                  * Traverse the list of peripherals and attempt to find
2734                  * the requested peripheral.
2735                  */
2736                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2737                      (nperiph != NULL) && (i <= cgdl->index);
2738                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2739                         if (i == cgdl->index) {
2740                                 strncpy(cgdl->periph_name,
2741                                         nperiph->periph_name,
2742                                         DEV_IDLEN);
2743                                 cgdl->unit_number = nperiph->unit_number;
2744                                 found = 1;
2745                         }
2746                 }
2747                 if (found == 0) {
2748                         cgdl->status = CAM_GDEVLIST_ERROR;
2749                         break;
2750                 }
2751
2752                 if (nperiph == NULL)
2753                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2754                 else
2755                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2756
2757                 cgdl->index++;
2758                 cgdl->generation = device->generation;
2759
2760                 cgdl->ccb_h.status = CAM_REQ_CMP;
2761                 break;
2762         }
2763         case XPT_DEV_MATCH:
2764         {
2765                 dev_pos_type position_type;
2766                 struct ccb_dev_match *cdm;
2767
2768                 cdm = &start_ccb->cdm;
2769
2770                 /*
2771                  * There are two ways of getting at information in the EDT.
2772                  * The first way is via the primary EDT tree.  It starts
2773                  * with a list of busses, then a list of targets on a bus,
2774                  * then devices/luns on a target, and then peripherals on a
2775                  * device/lun.  The "other" way is by the peripheral driver
2776                  * lists.  The peripheral driver lists are organized by
2777                  * peripheral driver.  (obviously)  So it makes sense to
2778                  * use the peripheral driver list if the user is looking
2779                  * for something like "da1", or all "da" devices.  If the
2780                  * user is looking for something on a particular bus/target
2781                  * or lun, it's generally better to go through the EDT tree.
2782                  */
2783
2784                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2785                         position_type = cdm->pos.position_type;
2786                 else {
2787                         u_int i;
2788
2789                         position_type = CAM_DEV_POS_NONE;
2790
2791                         for (i = 0; i < cdm->num_patterns; i++) {
2792                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2793                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2794                                         position_type = CAM_DEV_POS_EDT;
2795                                         break;
2796                                 }
2797                         }
2798
2799                         if (cdm->num_patterns == 0)
2800                                 position_type = CAM_DEV_POS_EDT;
2801                         else if (position_type == CAM_DEV_POS_NONE)
2802                                 position_type = CAM_DEV_POS_PDRV;
2803                 }
2804
2805                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2806                 case CAM_DEV_POS_EDT:
2807                         xptedtmatch(cdm);
2808                         break;
2809                 case CAM_DEV_POS_PDRV:
2810                         xptperiphlistmatch(cdm);
2811                         break;
2812                 default:
2813                         cdm->status = CAM_DEV_MATCH_ERROR;
2814                         break;
2815                 }
2816
2817                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2818                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2819                 else
2820                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2821
2822                 break;
2823         }
2824         case XPT_SASYNC_CB:
2825         {
2826                 struct ccb_setasync *csa;
2827                 struct async_node *cur_entry;
2828                 struct async_list *async_head;
2829                 u_int32_t added;
2830
2831                 csa = &start_ccb->csa;
2832                 added = csa->event_enable;
2833                 async_head = &path->device->asyncs;
2834
2835                 /*
2836                  * If there is already an entry for us, simply
2837                  * update it.
2838                  */
2839                 cur_entry = SLIST_FIRST(async_head);
2840                 while (cur_entry != NULL) {
2841                         if ((cur_entry->callback_arg == csa->callback_arg)
2842                          && (cur_entry->callback == csa->callback))
2843                                 break;
2844                         cur_entry = SLIST_NEXT(cur_entry, links);
2845                 }
2846
2847                 if (cur_entry != NULL) {
2848                         /*
2849                          * If the request has no flags set,
2850                          * remove the entry.
2851                          */
2852                         added &= ~cur_entry->event_enable;
2853                         if (csa->event_enable == 0) {
2854                                 SLIST_REMOVE(async_head, cur_entry,
2855                                              async_node, links);
2856                                 xpt_release_device(path->device);
2857                                 free(cur_entry, M_CAMXPT);
2858                         } else {
2859                                 cur_entry->event_enable = csa->event_enable;
2860                         }
2861                         csa->event_enable = added;
2862                 } else {
2863                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2864                                            M_NOWAIT);
2865                         if (cur_entry == NULL) {
2866                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2867                                 break;
2868                         }
2869                         cur_entry->event_enable = csa->event_enable;
2870                         cur_entry->event_lock =
2871                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2872                         cur_entry->callback_arg = csa->callback_arg;
2873                         cur_entry->callback = csa->callback;
2874                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2875                         xpt_acquire_device(path->device);
2876                 }
2877                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2878                 break;
2879         }
2880         case XPT_REL_SIMQ:
2881         {
2882                 struct ccb_relsim *crs;
2883                 struct cam_ed *dev;
2884
2885                 crs = &start_ccb->crs;
2886                 dev = path->device;
2887                 if (dev == NULL) {
2888
2889                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2890                         break;
2891                 }
2892
2893                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2894
2895                         /* Don't ever go below one opening */
2896                         if (crs->openings > 0) {
2897                                 xpt_dev_ccbq_resize(path, crs->openings);
2898                                 if (bootverbose) {
2899                                         xpt_print(path,
2900                                             "number of openings is now %d\n",
2901                                             crs->openings);
2902                                 }
2903                         }
2904                 }
2905
2906                 mtx_lock(&dev->sim->devq->send_mtx);
2907                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2908
2909                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2910
2911                                 /*
2912                                  * Just extend the old timeout and decrement
2913                                  * the freeze count so that a single timeout
2914                                  * is sufficient for releasing the queue.
2915                                  */
2916                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2917                                 callout_stop(&dev->callout);
2918                         } else {
2919
2920                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2921                         }
2922
2923                         callout_reset_sbt(&dev->callout,
2924                             SBT_1MS * crs->release_timeout, 0,
2925                             xpt_release_devq_timeout, dev, 0);
2926
2927                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2928
2929                 }
2930
2931                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2932
2933                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2934                                 /*
2935                                  * Decrement the freeze count so that a single
2936                                  * completion is still sufficient to unfreeze
2937                                  * the queue.
2938                                  */
2939                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2940                         } else {
2941
2942                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2943                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2944                         }
2945                 }
2946
2947                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2948
2949                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2950                          || (dev->ccbq.dev_active == 0)) {
2951
2952                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2953                         } else {
2954
2955                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2956                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2957                         }
2958                 }
2959                 mtx_unlock(&dev->sim->devq->send_mtx);
2960
2961                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2962                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2963                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2964                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2965                 break;
2966         }
2967         case XPT_DEBUG: {
2968                 struct cam_path *oldpath;
2969
2970                 /* Check that all request bits are supported. */
2971                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2972                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2973                         break;
2974                 }
2975
2976                 cam_dflags = CAM_DEBUG_NONE;
2977                 if (cam_dpath != NULL) {
2978                         oldpath = cam_dpath;
2979                         cam_dpath = NULL;
2980                         xpt_free_path(oldpath);
2981                 }
2982                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2983                         if (xpt_create_path(&cam_dpath, NULL,
2984                                             start_ccb->ccb_h.path_id,
2985                                             start_ccb->ccb_h.target_id,
2986                                             start_ccb->ccb_h.target_lun) !=
2987                                             CAM_REQ_CMP) {
2988                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2989                         } else {
2990                                 cam_dflags = start_ccb->cdbg.flags;
2991                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2992                                 xpt_print(cam_dpath, "debugging flags now %x\n",
2993                                     cam_dflags);
2994                         }
2995                 } else
2996                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2997                 break;
2998         }
2999         case XPT_NOOP:
3000                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3001                         xpt_freeze_devq(path, 1);
3002                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3003                 break;
3004         case XPT_REPROBE_LUN:
3005                 xpt_async(AC_INQ_CHANGED, path, NULL);
3006                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3007                 xpt_done(start_ccb);
3008                 break;
3009         default:
3010         case XPT_SDEV_TYPE:
3011         case XPT_TERM_IO:
3012         case XPT_ENG_INQ:
3013                 /* XXX Implement */
3014                 printf("%s: CCB type %#x not supported\n", __func__,
3015                        start_ccb->ccb_h.func_code);
3016                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3017                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3018                         xpt_done(start_ccb);
3019                 }
3020                 break;
3021         }
3022         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3023             ("xpt_action_default: func= %#x %s status %#x\n",
3024                 start_ccb->ccb_h.func_code,
3025                 xpt_action_name(start_ccb->ccb_h.func_code),
3026                 start_ccb->ccb_h.status));
3027 }
3028
3029 void
3030 xpt_polled_action(union ccb *start_ccb)
3031 {
3032         u_int32_t timeout;
3033         struct    cam_sim *sim;
3034         struct    cam_devq *devq;
3035         struct    cam_ed *dev;
3036
3037         timeout = start_ccb->ccb_h.timeout * 10;
3038         sim = start_ccb->ccb_h.path->bus->sim;
3039         devq = sim->devq;
3040         dev = start_ccb->ccb_h.path->device;
3041
3042         mtx_unlock(&dev->device_mtx);
3043
3044         /*
3045          * Steal an opening so that no other queued requests
3046          * can get it before us while we simulate interrupts.
3047          */
3048         mtx_lock(&devq->send_mtx);
3049         dev->ccbq.dev_openings--;
3050         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3051             (--timeout > 0)) {
3052                 mtx_unlock(&devq->send_mtx);
3053                 DELAY(100);
3054                 CAM_SIM_LOCK(sim);
3055                 (*(sim->sim_poll))(sim);
3056                 CAM_SIM_UNLOCK(sim);
3057                 camisr_runqueue();
3058                 mtx_lock(&devq->send_mtx);
3059         }
3060         dev->ccbq.dev_openings++;
3061         mtx_unlock(&devq->send_mtx);
3062
3063         if (timeout != 0) {
3064                 xpt_action(start_ccb);
3065                 while(--timeout > 0) {
3066                         CAM_SIM_LOCK(sim);
3067                         (*(sim->sim_poll))(sim);
3068                         CAM_SIM_UNLOCK(sim);
3069                         camisr_runqueue();
3070                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3071                             != CAM_REQ_INPROG)
3072                                 break;
3073                         DELAY(100);
3074                 }
3075                 if (timeout == 0) {
3076                         /*
3077                          * XXX Is it worth adding a sim_timeout entry
3078                          * point so we can attempt recovery?  If
3079                          * this is only used for dumps, I don't think
3080                          * it is.
3081                          */
3082                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3083                 }
3084         } else {
3085                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3086         }
3087
3088         mtx_lock(&dev->device_mtx);
3089 }
3090
3091 /*
3092  * Schedule a peripheral driver to receive a ccb when its
3093  * target device has space for more transactions.
3094  */
3095 void
3096 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3097 {
3098
3099         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3100         cam_periph_assert(periph, MA_OWNED);
3101         if (new_priority < periph->scheduled_priority) {
3102                 periph->scheduled_priority = new_priority;
3103                 xpt_run_allocq(periph, 0);
3104         }
3105 }
3106
3107
3108 /*
3109  * Schedule a device to run on a given queue.
3110  * If the device was inserted as a new entry on the queue,
3111  * return 1 meaning the device queue should be run. If we
3112  * were already queued, implying someone else has already
3113  * started the queue, return 0 so the caller doesn't attempt
3114  * to run the queue.
3115  */
3116 static int
3117 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3118                  u_int32_t new_priority)
3119 {
3120         int retval;
3121         u_int32_t old_priority;
3122
3123         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3124
3125         old_priority = pinfo->priority;
3126
3127         /*
3128          * Are we already queued?
3129          */
3130         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3131                 /* Simply reorder based on new priority */
3132                 if (new_priority < old_priority) {
3133                         camq_change_priority(queue, pinfo->index,
3134                                              new_priority);
3135                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3136                                         ("changed priority to %d\n",
3137                                          new_priority));
3138                         retval = 1;
3139                 } else
3140                         retval = 0;
3141         } else {
3142                 /* New entry on the queue */
3143                 if (new_priority < old_priority)
3144                         pinfo->priority = new_priority;
3145
3146                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3147                                 ("Inserting onto queue\n"));
3148                 pinfo->generation = ++queue->generation;
3149                 camq_insert(queue, pinfo);
3150                 retval = 1;
3151         }
3152         return (retval);
3153 }
3154
3155 static void
3156 xpt_run_allocq_task(void *context, int pending)
3157 {
3158         struct cam_periph *periph = context;
3159
3160         cam_periph_lock(periph);
3161         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3162         xpt_run_allocq(periph, 1);
3163         cam_periph_unlock(periph);
3164         cam_periph_release(periph);
3165 }
3166
3167 static void
3168 xpt_run_allocq(struct cam_periph *periph, int sleep)
3169 {
3170         struct cam_ed   *device;
3171         union ccb       *ccb;
3172         uint32_t         prio;
3173
3174         cam_periph_assert(periph, MA_OWNED);
3175         if (periph->periph_allocating)
3176                 return;
3177         periph->periph_allocating = 1;
3178         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3179         device = periph->path->device;
3180         ccb = NULL;
3181 restart:
3182         while ((prio = min(periph->scheduled_priority,
3183             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3184             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3185              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3186
3187                 if (ccb == NULL &&
3188                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3189                         if (sleep) {
3190                                 ccb = xpt_get_ccb(periph);
3191                                 goto restart;
3192                         }
3193                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3194                                 break;
3195                         cam_periph_doacquire(periph);
3196                         periph->flags |= CAM_PERIPH_RUN_TASK;
3197                         taskqueue_enqueue(xsoftc.xpt_taskq,
3198                             &periph->periph_run_task);
3199                         break;
3200                 }
3201                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3202                 if (prio == periph->immediate_priority) {
3203                         periph->immediate_priority = CAM_PRIORITY_NONE;
3204                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3205                                         ("waking cam_periph_getccb()\n"));
3206                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3207                                           periph_links.sle);
3208                         wakeup(&periph->ccb_list);
3209                 } else {
3210                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3211                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3212                                         ("calling periph_start()\n"));
3213                         periph->periph_start(periph, ccb);
3214                 }
3215                 ccb = NULL;
3216         }
3217         if (ccb != NULL)
3218                 xpt_release_ccb(ccb);
3219         periph->periph_allocating = 0;
3220 }
3221
3222 static void
3223 xpt_run_devq(struct cam_devq *devq)
3224 {
3225         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3226         int lock;
3227
3228         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3229
3230         devq->send_queue.qfrozen_cnt++;
3231         while ((devq->send_queue.entries > 0)
3232             && (devq->send_openings > 0)
3233             && (devq->send_queue.qfrozen_cnt <= 1)) {
3234                 struct  cam_ed *device;
3235                 union ccb *work_ccb;
3236                 struct  cam_sim *sim;
3237
3238                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3239                                                            CAMQ_HEAD);
3240                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3241                                 ("running device %p\n", device));
3242
3243                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3244                 if (work_ccb == NULL) {
3245                         printf("device on run queue with no ccbs???\n");
3246                         continue;
3247                 }
3248
3249                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3250
3251                         mtx_lock(&xsoftc.xpt_highpower_lock);
3252                         if (xsoftc.num_highpower <= 0) {
3253                                 /*
3254                                  * We got a high power command, but we
3255                                  * don't have any available slots.  Freeze
3256                                  * the device queue until we have a slot
3257                                  * available.
3258                                  */
3259                                 xpt_freeze_devq_device(device, 1);
3260                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3261                                                    highpowerq_entry);
3262
3263                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3264                                 continue;
3265                         } else {
3266                                 /*
3267                                  * Consume a high power slot while
3268                                  * this ccb runs.
3269                                  */
3270                                 xsoftc.num_highpower--;
3271                         }
3272                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3273                 }
3274                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3275                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3276                 devq->send_openings--;
3277                 devq->send_active++;
3278                 xpt_schedule_devq(devq, device);
3279                 mtx_unlock(&devq->send_mtx);
3280
3281                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3282                         /*
3283                          * The client wants to freeze the queue
3284                          * after this CCB is sent.
3285                          */
3286                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3287                 }
3288
3289                 /* In Target mode, the peripheral driver knows best... */
3290                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3291                         if ((device->inq_flags & SID_CmdQue) != 0
3292                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3293                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3294                         else
3295                                 /*
3296                                  * Clear this in case of a retried CCB that
3297                                  * failed due to a rejected tag.
3298                                  */
3299                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3300                 }
3301
3302                 switch (work_ccb->ccb_h.func_code) {
3303                 case XPT_SCSI_IO:
3304                         CAM_DEBUG(work_ccb->ccb_h.path,
3305                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3306                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3307                                           &device->inq_data),
3308                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3309                                              cdb_str, sizeof(cdb_str))));
3310                         break;
3311                 case XPT_ATA_IO:
3312                         CAM_DEBUG(work_ccb->ccb_h.path,
3313                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3314                              ata_op_string(&work_ccb->ataio.cmd),
3315                              ata_cmd_string(&work_ccb->ataio.cmd,
3316                                             cdb_str, sizeof(cdb_str))));
3317                         break;
3318                 default:
3319                         break;
3320                 }
3321
3322                 /*
3323                  * Device queues can be shared among multiple SIM instances
3324                  * that reside on different busses.  Use the SIM from the
3325                  * queued device, rather than the one from the calling bus.
3326                  */
3327                 sim = device->sim;
3328                 lock = (mtx_owned(sim->mtx) == 0);
3329                 if (lock)
3330                         CAM_SIM_LOCK(sim);
3331                 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms
3332                 (*(sim->sim_action))(sim, work_ccb);
3333                 if (lock)
3334                         CAM_SIM_UNLOCK(sim);
3335                 mtx_lock(&devq->send_mtx);
3336         }
3337         devq->send_queue.qfrozen_cnt--;
3338 }
3339
3340 /*
3341  * This function merges stuff from the slave ccb into the master ccb, while
3342  * keeping important fields in the master ccb constant.
3343  */
3344 void
3345 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3346 {
3347
3348         /*
3349          * Pull fields that are valid for peripheral drivers to set
3350          * into the master CCB along with the CCB "payload".
3351          */
3352         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3353         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3354         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3355         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3356         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3357               sizeof(union ccb) - sizeof(struct ccb_hdr));
3358 }
3359
3360 void
3361 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3362                     u_int32_t priority, u_int32_t flags)
3363 {
3364
3365         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3366         ccb_h->pinfo.priority = priority;
3367         ccb_h->path = path;
3368         ccb_h->path_id = path->bus->path_id;
3369         if (path->target)
3370                 ccb_h->target_id = path->target->target_id;
3371         else
3372                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3373         if (path->device) {
3374                 ccb_h->target_lun = path->device->lun_id;
3375                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3376         } else {
3377                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3378         }
3379         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3380         ccb_h->flags = flags;
3381         ccb_h->xflags = 0;
3382 }
3383
3384 void
3385 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3386 {
3387         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3388 }
3389
3390 /* Path manipulation functions */
3391 cam_status
3392 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3393                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3394 {
3395         struct     cam_path *path;
3396         cam_status status;
3397
3398         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3399
3400         if (path == NULL) {
3401                 status = CAM_RESRC_UNAVAIL;
3402                 return(status);
3403         }
3404         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3405         if (status != CAM_REQ_CMP) {
3406                 free(path, M_CAMPATH);
3407                 path = NULL;
3408         }
3409         *new_path_ptr = path;
3410         return (status);
3411 }
3412
3413 cam_status
3414 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3415                          struct cam_periph *periph, path_id_t path_id,
3416                          target_id_t target_id, lun_id_t lun_id)
3417 {
3418
3419         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3420             lun_id));
3421 }
3422
3423 cam_status
3424 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3425                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3426 {
3427         struct       cam_eb *bus;
3428         struct       cam_et *target;
3429         struct       cam_ed *device;
3430         cam_status   status;
3431
3432         status = CAM_REQ_CMP;   /* Completed without error */
3433         target = NULL;          /* Wildcarded */
3434         device = NULL;          /* Wildcarded */
3435
3436         /*
3437          * We will potentially modify the EDT, so block interrupts
3438          * that may attempt to create cam paths.
3439          */
3440         bus = xpt_find_bus(path_id);
3441         if (bus == NULL) {
3442                 status = CAM_PATH_INVALID;
3443         } else {
3444                 xpt_lock_buses();
3445                 mtx_lock(&bus->eb_mtx);
3446                 target = xpt_find_target(bus, target_id);
3447                 if (target == NULL) {
3448                         /* Create one */
3449                         struct cam_et *new_target;
3450
3451                         new_target = xpt_alloc_target(bus, target_id);
3452                         if (new_target == NULL) {
3453                                 status = CAM_RESRC_UNAVAIL;
3454                         } else {
3455                                 target = new_target;
3456                         }
3457                 }
3458                 xpt_unlock_buses();
3459                 if (target != NULL) {
3460                         device = xpt_find_device(target, lun_id);
3461                         if (device == NULL) {
3462                                 /* Create one */
3463                                 struct cam_ed *new_device;
3464
3465                                 new_device =
3466                                     (*(bus->xport->alloc_device))(bus,
3467                                                                       target,
3468                                                                       lun_id);
3469                                 if (new_device == NULL) {
3470                                         status = CAM_RESRC_UNAVAIL;
3471                                 } else {
3472                                         device = new_device;
3473                                 }
3474                         }
3475                 }
3476                 mtx_unlock(&bus->eb_mtx);
3477         }
3478
3479         /*
3480          * Only touch the user's data if we are successful.
3481          */
3482         if (status == CAM_REQ_CMP) {
3483                 new_path->periph = perph;
3484                 new_path->bus = bus;
3485                 new_path->target = target;
3486                 new_path->device = device;
3487                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3488         } else {
3489                 if (device != NULL)
3490                         xpt_release_device(device);
3491                 if (target != NULL)
3492                         xpt_release_target(target);
3493                 if (bus != NULL)
3494                         xpt_release_bus(bus);
3495         }
3496         return (status);
3497 }
3498
3499 cam_status
3500 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3501 {
3502         struct     cam_path *new_path;
3503
3504         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3505         if (new_path == NULL)
3506                 return(CAM_RESRC_UNAVAIL);
3507         xpt_copy_path(new_path, path);
3508         *new_path_ptr = new_path;
3509         return (CAM_REQ_CMP);
3510 }
3511
3512 void
3513 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3514 {
3515
3516         *new_path = *path;
3517         if (path->bus != NULL)
3518                 xpt_acquire_bus(path->bus);
3519         if (path->target != NULL)
3520                 xpt_acquire_target(path->target);
3521         if (path->device != NULL)
3522                 xpt_acquire_device(path->device);
3523 }
3524
3525 void
3526 xpt_release_path(struct cam_path *path)
3527 {
3528         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3529         if (path->device != NULL) {
3530                 xpt_release_device(path->device);
3531                 path->device = NULL;
3532         }
3533         if (path->target != NULL) {
3534                 xpt_release_target(path->target);
3535                 path->target = NULL;
3536         }
3537         if (path->bus != NULL) {
3538                 xpt_release_bus(path->bus);
3539                 path->bus = NULL;
3540         }
3541 }
3542
3543 void
3544 xpt_free_path(struct cam_path *path)
3545 {
3546
3547         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3548         xpt_release_path(path);
3549         free(path, M_CAMPATH);
3550 }
3551
3552 void
3553 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3554     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3555 {
3556
3557         xpt_lock_buses();
3558         if (bus_ref) {
3559                 if (path->bus)
3560                         *bus_ref = path->bus->refcount;
3561                 else
3562                         *bus_ref = 0;
3563         }
3564         if (periph_ref) {
3565                 if (path->periph)
3566                         *periph_ref = path->periph->refcount;
3567                 else
3568                         *periph_ref = 0;
3569         }
3570         xpt_unlock_buses();
3571         if (target_ref) {
3572                 if (path->target)
3573                         *target_ref = path->target->refcount;
3574                 else
3575                         *target_ref = 0;
3576         }
3577         if (device_ref) {
3578                 if (path->device)
3579                         *device_ref = path->device->refcount;
3580                 else
3581                         *device_ref = 0;
3582         }
3583 }
3584
3585 /*
3586  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3587  * in path1, 2 for match with wildcards in path2.
3588  */
3589 int
3590 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3591 {
3592         int retval = 0;
3593
3594         if (path1->bus != path2->bus) {
3595                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3596                         retval = 1;
3597                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3598                         retval = 2;
3599                 else
3600                         return (-1);
3601         }
3602         if (path1->target != path2->target) {
3603                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3604                         if (retval == 0)
3605                                 retval = 1;
3606                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3607                         retval = 2;
3608                 else
3609                         return (-1);
3610         }
3611         if (path1->device != path2->device) {
3612                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3613                         if (retval == 0)
3614                                 retval = 1;
3615                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3616                         retval = 2;
3617                 else
3618                         return (-1);
3619         }
3620         return (retval);
3621 }
3622
3623 int
3624 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3625 {
3626         int retval = 0;
3627
3628         if (path->bus != dev->target->bus) {
3629                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3630                         retval = 1;
3631                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3632                         retval = 2;
3633                 else
3634                         return (-1);
3635         }
3636         if (path->target != dev->target) {
3637                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3638                         if (retval == 0)
3639                                 retval = 1;
3640                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3641                         retval = 2;
3642                 else
3643                         return (-1);
3644         }
3645         if (path->device != dev) {
3646                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3647                         if (retval == 0)
3648                                 retval = 1;
3649                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3650                         retval = 2;
3651                 else
3652                         return (-1);
3653         }
3654         return (retval);
3655 }
3656
3657 void
3658 xpt_print_path(struct cam_path *path)
3659 {
3660
3661         if (path == NULL)
3662                 printf("(nopath): ");
3663         else {
3664                 if (path->periph != NULL)
3665                         printf("(%s%d:", path->periph->periph_name,
3666                                path->periph->unit_number);
3667                 else
3668                         printf("(noperiph:");
3669
3670                 if (path->bus != NULL)
3671                         printf("%s%d:%d:", path->bus->sim->sim_name,
3672                                path->bus->sim->unit_number,
3673                                path->bus->sim->bus_id);
3674                 else
3675                         printf("nobus:");
3676
3677                 if (path->target != NULL)
3678                         printf("%d:", path->target->target_id);
3679                 else
3680                         printf("X:");
3681
3682                 if (path->device != NULL)
3683                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3684                 else
3685                         printf("X): ");
3686         }
3687 }
3688
3689 void
3690 xpt_print_device(struct cam_ed *device)
3691 {
3692
3693         if (device == NULL)
3694                 printf("(nopath): ");
3695         else {
3696                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3697                        device->sim->unit_number,
3698                        device->sim->bus_id,
3699                        device->target->target_id,
3700                        (uintmax_t)device->lun_id);
3701         }
3702 }
3703
3704 void
3705 xpt_print(struct cam_path *path, const char *fmt, ...)
3706 {
3707         va_list ap;
3708         xpt_print_path(path);
3709         va_start(ap, fmt);
3710         vprintf(fmt, ap);
3711         va_end(ap);
3712 }
3713
3714 int
3715 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3716 {
3717         struct sbuf sb;
3718
3719         sbuf_new(&sb, str, str_len, 0);
3720
3721         if (path == NULL)
3722                 sbuf_printf(&sb, "(nopath): ");
3723         else {
3724                 if (path->periph != NULL)
3725                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3726                                     path->periph->unit_number);
3727                 else
3728                         sbuf_printf(&sb, "(noperiph:");
3729
3730                 if (path->bus != NULL)
3731                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3732                                     path->bus->sim->unit_number,
3733                                     path->bus->sim->bus_id);
3734                 else
3735                         sbuf_printf(&sb, "nobus:");
3736
3737                 if (path->target != NULL)
3738                         sbuf_printf(&sb, "%d:", path->target->target_id);
3739                 else
3740                         sbuf_printf(&sb, "X:");
3741
3742                 if (path->device != NULL)
3743                         sbuf_printf(&sb, "%jx): ",
3744                             (uintmax_t)path->device->lun_id);
3745                 else
3746                         sbuf_printf(&sb, "X): ");
3747         }
3748         sbuf_finish(&sb);
3749
3750         return(sbuf_len(&sb));
3751 }
3752
3753 path_id_t
3754 xpt_path_path_id(struct cam_path *path)
3755 {
3756         return(path->bus->path_id);
3757 }
3758
3759 target_id_t
3760 xpt_path_target_id(struct cam_path *path)
3761 {
3762         if (path->target != NULL)
3763                 return (path->target->target_id);
3764         else
3765                 return (CAM_TARGET_WILDCARD);
3766 }
3767
3768 lun_id_t
3769 xpt_path_lun_id(struct cam_path *path)
3770 {
3771         if (path->device != NULL)
3772                 return (path->device->lun_id);
3773         else
3774                 return (CAM_LUN_WILDCARD);
3775 }
3776
3777 struct cam_sim *
3778 xpt_path_sim(struct cam_path *path)
3779 {
3780
3781         return (path->bus->sim);
3782 }
3783
3784 struct cam_periph*
3785 xpt_path_periph(struct cam_path *path)
3786 {
3787
3788         return (path->periph);
3789 }
3790
3791 /*
3792  * Release a CAM control block for the caller.  Remit the cost of the structure
3793  * to the device referenced by the path.  If the this device had no 'credits'
3794  * and peripheral drivers have registered async callbacks for this notification
3795  * call them now.
3796  */
3797 void
3798 xpt_release_ccb(union ccb *free_ccb)
3799 {
3800         struct   cam_ed *device;
3801         struct   cam_periph *periph;
3802
3803         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3804         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3805         device = free_ccb->ccb_h.path->device;
3806         periph = free_ccb->ccb_h.path->periph;
3807
3808         xpt_free_ccb(free_ccb);
3809         periph->periph_allocated--;
3810         cam_ccbq_release_opening(&device->ccbq);
3811         xpt_run_allocq(periph, 0);
3812 }
3813
3814 /* Functions accessed by SIM drivers */
3815
3816 static struct xpt_xport xport_default = {
3817         .alloc_device = xpt_alloc_device_default,
3818         .action = xpt_action_default,
3819         .async = xpt_dev_async_default,
3820 };
3821
3822 /*
3823  * A sim structure, listing the SIM entry points and instance
3824  * identification info is passed to xpt_bus_register to hook the SIM
3825  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3826  * for this new bus and places it in the array of busses and assigns
3827  * it a path_id.  The path_id may be influenced by "hard wiring"
3828  * information specified by the user.  Once interrupt services are
3829  * available, the bus will be probed.
3830  */
3831 int32_t
3832 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3833 {
3834         struct cam_eb *new_bus;
3835         struct cam_eb *old_bus;
3836         struct ccb_pathinq cpi;
3837         struct cam_path *path;
3838         cam_status status;
3839
3840         mtx_assert(sim->mtx, MA_OWNED);
3841
3842         sim->bus_id = bus;
3843         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3844                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3845         if (new_bus == NULL) {
3846                 /* Couldn't satisfy request */
3847                 return (CAM_RESRC_UNAVAIL);
3848         }
3849
3850         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3851         TAILQ_INIT(&new_bus->et_entries);
3852         cam_sim_hold(sim);
3853         new_bus->sim = sim;
3854         timevalclear(&new_bus->last_reset);
3855         new_bus->flags = 0;
3856         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3857         new_bus->generation = 0;
3858
3859         xpt_lock_buses();
3860         sim->path_id = new_bus->path_id =
3861             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3862         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3863         while (old_bus != NULL
3864             && old_bus->path_id < new_bus->path_id)
3865                 old_bus = TAILQ_NEXT(old_bus, links);
3866         if (old_bus != NULL)
3867                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3868         else
3869                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3870         xsoftc.bus_generation++;
3871         xpt_unlock_buses();
3872
3873         /*
3874          * Set a default transport so that a PATH_INQ can be issued to
3875          * the SIM.  This will then allow for probing and attaching of
3876          * a more appropriate transport.
3877          */
3878         new_bus->xport = &xport_default;
3879
3880         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3881                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3882         if (status != CAM_REQ_CMP) {
3883                 xpt_release_bus(new_bus);
3884                 free(path, M_CAMXPT);
3885                 return (CAM_RESRC_UNAVAIL);
3886         }
3887
3888         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3889         cpi.ccb_h.func_code = XPT_PATH_INQ;
3890         xpt_action((union ccb *)&cpi);
3891
3892         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3893                 switch (cpi.transport) {
3894                 case XPORT_SPI:
3895                 case XPORT_SAS:
3896                 case XPORT_FC:
3897                 case XPORT_USB:
3898                 case XPORT_ISCSI:
3899                 case XPORT_SRP:
3900                 case XPORT_PPB:
3901                         new_bus->xport = scsi_get_xport();
3902                         break;
3903                 case XPORT_ATA:
3904                 case XPORT_SATA:
3905                         new_bus->xport = ata_get_xport();
3906                         break;
3907                 default:
3908                         new_bus->xport = &xport_default;
3909                         break;
3910                 }
3911         }
3912
3913         /* Notify interested parties */
3914         if (sim->path_id != CAM_XPT_PATH_ID) {
3915
3916                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3917                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3918                         union   ccb *scan_ccb;
3919
3920                         /* Initiate bus rescan. */
3921                         scan_ccb = xpt_alloc_ccb_nowait();
3922                         if (scan_ccb != NULL) {
3923                                 scan_ccb->ccb_h.path = path;
3924                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3925                                 scan_ccb->crcn.flags = 0;
3926                                 xpt_rescan(scan_ccb);
3927                         } else {
3928                                 xpt_print(path,
3929                                           "Can't allocate CCB to scan bus\n");
3930                                 xpt_free_path(path);
3931                         }
3932                 } else
3933                         xpt_free_path(path);
3934         } else
3935                 xpt_free_path(path);
3936         return (CAM_SUCCESS);
3937 }
3938
3939 int32_t
3940 xpt_bus_deregister(path_id_t pathid)
3941 {
3942         struct cam_path bus_path;
3943         cam_status status;
3944
3945         status = xpt_compile_path(&bus_path, NULL, pathid,
3946                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3947         if (status != CAM_REQ_CMP)
3948                 return (status);
3949
3950         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3951         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3952
3953         /* Release the reference count held while registered. */
3954         xpt_release_bus(bus_path.bus);
3955         xpt_release_path(&bus_path);
3956
3957         return (CAM_REQ_CMP);
3958 }
3959
3960 static path_id_t
3961 xptnextfreepathid(void)
3962 {
3963         struct cam_eb *bus;
3964         path_id_t pathid;
3965         const char *strval;
3966
3967         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3968         pathid = 0;
3969         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3970 retry:
3971         /* Find an unoccupied pathid */
3972         while (bus != NULL && bus->path_id <= pathid) {
3973                 if (bus->path_id == pathid)
3974                         pathid++;
3975                 bus = TAILQ_NEXT(bus, links);
3976         }
3977
3978         /*
3979          * Ensure that this pathid is not reserved for
3980          * a bus that may be registered in the future.
3981          */
3982         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3983                 ++pathid;
3984                 /* Start the search over */
3985                 goto retry;
3986         }
3987         return (pathid);
3988 }
3989
3990 static path_id_t
3991 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
3992 {
3993         path_id_t pathid;
3994         int i, dunit, val;
3995         char buf[32];
3996         const char *dname;
3997
3998         pathid = CAM_XPT_PATH_ID;
3999         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4000         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4001                 return (pathid);
4002         i = 0;
4003         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4004                 if (strcmp(dname, "scbus")) {
4005                         /* Avoid a bit of foot shooting. */
4006                         continue;
4007                 }
4008                 if (dunit < 0)          /* unwired?! */
4009                         continue;
4010                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4011                         if (sim_bus == val) {
4012                                 pathid = dunit;
4013                                 break;
4014                         }
4015                 } else if (sim_bus == 0) {
4016                         /* Unspecified matches bus 0 */
4017                         pathid = dunit;
4018                         break;
4019                 } else {
4020                         printf("Ambiguous scbus configuration for %s%d "
4021                                "bus %d, cannot wire down.  The kernel "
4022                                "config entry for scbus%d should "
4023                                "specify a controller bus.\n"
4024                                "Scbus will be assigned dynamically.\n",
4025                                sim_name, sim_unit, sim_bus, dunit);
4026                         break;
4027                 }
4028         }
4029
4030         if (pathid == CAM_XPT_PATH_ID)
4031                 pathid = xptnextfreepathid();
4032         return (pathid);
4033 }
4034
4035 static const char *
4036 xpt_async_string(u_int32_t async_code)
4037 {
4038
4039         switch (async_code) {
4040         case AC_BUS_RESET: return ("AC_BUS_RESET");
4041         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4042         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4043         case AC_SENT_BDR: return ("AC_SENT_BDR");
4044         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4045         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4046         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4047         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4048         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4049         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4050         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4051         case AC_CONTRACT: return ("AC_CONTRACT");
4052         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4053         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4054         }
4055         return ("AC_UNKNOWN");
4056 }
4057
4058 static int
4059 xpt_async_size(u_int32_t async_code)
4060 {
4061
4062         switch (async_code) {
4063         case AC_BUS_RESET: return (0);
4064         case AC_UNSOL_RESEL: return (0);
4065         case AC_SCSI_AEN: return (0);
4066         case AC_SENT_BDR: return (0);
4067         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4068         case AC_PATH_DEREGISTERED: return (0);
4069         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4070         case AC_LOST_DEVICE: return (0);
4071         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4072         case AC_INQ_CHANGED: return (0);
4073         case AC_GETDEV_CHANGED: return (0);
4074         case AC_CONTRACT: return (sizeof(struct ac_contract));
4075         case AC_ADVINFO_CHANGED: return (-1);
4076         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4077         }
4078         return (0);
4079 }
4080
4081 static int
4082 xpt_async_process_dev(struct cam_ed *device, void *arg)
4083 {
4084         union ccb *ccb = arg;
4085         struct cam_path *path = ccb->ccb_h.path;
4086         void *async_arg = ccb->casync.async_arg_ptr;
4087         u_int32_t async_code = ccb->casync.async_code;
4088         int relock;
4089
4090         if (path->device != device
4091          && path->device->lun_id != CAM_LUN_WILDCARD
4092          && device->lun_id != CAM_LUN_WILDCARD)
4093                 return (1);
4094
4095         /*
4096          * The async callback could free the device.
4097          * If it is a broadcast async, it doesn't hold
4098          * device reference, so take our own reference.
4099          */
4100         xpt_acquire_device(device);
4101
4102         /*
4103          * If async for specific device is to be delivered to
4104          * the wildcard client, take the specific device lock.
4105          * XXX: We may need a way for client to specify it.
4106          */
4107         if ((device->lun_id == CAM_LUN_WILDCARD &&
4108              path->device->lun_id != CAM_LUN_WILDCARD) ||
4109             (device->target->target_id == CAM_TARGET_WILDCARD &&
4110              path->target->target_id != CAM_TARGET_WILDCARD) ||
4111             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4112              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4113                 mtx_unlock(&device->device_mtx);
4114                 xpt_path_lock(path);
4115                 relock = 1;
4116         } else
4117                 relock = 0;
4118
4119         (*(device->target->bus->xport->async))(async_code,
4120             device->target->bus, device->target, device, async_arg);
4121         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4122
4123         if (relock) {
4124                 xpt_path_unlock(path);
4125                 mtx_lock(&device->device_mtx);
4126         }
4127         xpt_release_device(device);
4128         return (1);
4129 }
4130
4131 static int
4132 xpt_async_process_tgt(struct cam_et *target, void *arg)
4133 {
4134         union ccb *ccb = arg;
4135         struct cam_path *path = ccb->ccb_h.path;
4136
4137         if (path->target != target
4138          && path->target->target_id != CAM_TARGET_WILDCARD
4139          && target->target_id != CAM_TARGET_WILDCARD)
4140                 return (1);
4141
4142         if (ccb->casync.async_code == AC_SENT_BDR) {
4143                 /* Update our notion of when the last reset occurred */
4144                 microtime(&target->last_reset);
4145         }
4146
4147         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4148 }
4149
4150 static void
4151 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4152 {
4153         struct cam_eb *bus;
4154         struct cam_path *path;
4155         void *async_arg;
4156         u_int32_t async_code;
4157
4158         path = ccb->ccb_h.path;
4159         async_code = ccb->casync.async_code;
4160         async_arg = ccb->casync.async_arg_ptr;
4161         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4162             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4163         bus = path->bus;
4164
4165         if (async_code == AC_BUS_RESET) {
4166                 /* Update our notion of when the last reset occurred */
4167                 microtime(&bus->last_reset);
4168         }
4169
4170         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4171
4172         /*
4173          * If this wasn't a fully wildcarded async, tell all
4174          * clients that want all async events.
4175          */
4176         if (bus != xpt_periph->path->bus) {
4177                 xpt_path_lock(xpt_periph->path);
4178                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4179                 xpt_path_unlock(xpt_periph->path);
4180         }
4181
4182         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4183                 xpt_release_devq(path, 1, TRUE);
4184         else
4185                 xpt_release_simq(path->bus->sim, TRUE);
4186         if (ccb->casync.async_arg_size > 0)
4187                 free(async_arg, M_CAMXPT);
4188         xpt_free_path(path);
4189         xpt_free_ccb(ccb);
4190 }
4191
4192 static void
4193 xpt_async_bcast(struct async_list *async_head,
4194                 u_int32_t async_code,
4195                 struct cam_path *path, void *async_arg)
4196 {
4197         struct async_node *cur_entry;
4198         int lock;
4199
4200         cur_entry = SLIST_FIRST(async_head);
4201         while (cur_entry != NULL) {
4202                 struct async_node *next_entry;
4203                 /*
4204                  * Grab the next list entry before we call the current
4205                  * entry's callback.  This is because the callback function
4206                  * can delete its async callback entry.
4207                  */
4208                 next_entry = SLIST_NEXT(cur_entry, links);
4209                 if ((cur_entry->event_enable & async_code) != 0) {
4210                         lock = cur_entry->event_lock;
4211                         if (lock)
4212                                 CAM_SIM_LOCK(path->device->sim);
4213                         cur_entry->callback(cur_entry->callback_arg,
4214                                             async_code, path,
4215                                             async_arg);
4216                         if (lock)
4217                                 CAM_SIM_UNLOCK(path->device->sim);
4218                 }
4219                 cur_entry = next_entry;
4220         }
4221 }
4222
4223 void
4224 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4225 {
4226         union ccb *ccb;
4227         int size;
4228
4229         ccb = xpt_alloc_ccb_nowait();
4230         if (ccb == NULL) {
4231                 xpt_print(path, "Can't allocate CCB to send %s\n",
4232                     xpt_async_string(async_code));
4233                 return;
4234         }
4235
4236         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4237                 xpt_print(path, "Can't allocate path to send %s\n",
4238                     xpt_async_string(async_code));
4239                 xpt_free_ccb(ccb);
4240                 return;
4241         }
4242         ccb->ccb_h.path->periph = NULL;
4243         ccb->ccb_h.func_code = XPT_ASYNC;
4244         ccb->ccb_h.cbfcnp = xpt_async_process;
4245         ccb->ccb_h.flags |= CAM_UNLOCKED;
4246         ccb->casync.async_code = async_code;
4247         ccb->casync.async_arg_size = 0;
4248         size = xpt_async_size(async_code);
4249         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4250             ("xpt_async: func %#x %s aync_code %d %s\n",
4251                 ccb->ccb_h.func_code,
4252                 xpt_action_name(ccb->ccb_h.func_code),
4253                 async_code,
4254                 xpt_async_string(async_code)));
4255         if (size > 0 && async_arg != NULL) {
4256                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4257                 if (ccb->casync.async_arg_ptr == NULL) {
4258                         xpt_print(path, "Can't allocate argument to send %s\n",
4259                             xpt_async_string(async_code));
4260                         xpt_free_path(ccb->ccb_h.path);
4261                         xpt_free_ccb(ccb);
4262                         return;
4263                 }
4264                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4265                 ccb->casync.async_arg_size = size;
4266         } else if (size < 0) {
4267                 ccb->casync.async_arg_ptr = async_arg;
4268                 ccb->casync.async_arg_size = size;
4269         }
4270         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4271                 xpt_freeze_devq(path, 1);
4272         else
4273                 xpt_freeze_simq(path->bus->sim, 1);
4274         xpt_done(ccb);
4275 }
4276
4277 static void
4278 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4279                       struct cam_et *target, struct cam_ed *device,
4280                       void *async_arg)
4281 {
4282
4283         /*
4284          * We only need to handle events for real devices.
4285          */
4286         if (target->target_id == CAM_TARGET_WILDCARD
4287          || device->lun_id == CAM_LUN_WILDCARD)
4288                 return;
4289
4290         printf("%s called\n", __func__);
4291 }
4292
4293 static uint32_t
4294 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4295 {
4296         struct cam_devq *devq;
4297         uint32_t freeze;
4298
4299         devq = dev->sim->devq;
4300         mtx_assert(&devq->send_mtx, MA_OWNED);
4301         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4302             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4303             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4304         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4305         /* Remove frozen device from sendq. */
4306         if (device_is_queued(dev))
4307                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4308         return (freeze);
4309 }
4310
4311 u_int32_t
4312 xpt_freeze_devq(struct cam_path *path, u_int count)
4313 {
4314         struct cam_ed   *dev = path->device;
4315         struct cam_devq *devq;
4316         uint32_t         freeze;
4317
4318         devq = dev->sim->devq;
4319         mtx_lock(&devq->send_mtx);
4320         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4321         freeze = xpt_freeze_devq_device(dev, count);
4322         mtx_unlock(&devq->send_mtx);
4323         return (freeze);
4324 }
4325
4326 u_int32_t
4327 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4328 {
4329         struct cam_devq *devq;
4330         uint32_t         freeze;
4331
4332         devq = sim->devq;
4333         mtx_lock(&devq->send_mtx);
4334         freeze = (devq->send_queue.qfrozen_cnt += count);
4335         mtx_unlock(&devq->send_mtx);
4336         return (freeze);
4337 }
4338
4339 static void
4340 xpt_release_devq_timeout(void *arg)
4341 {
4342         struct cam_ed *dev;
4343         struct cam_devq *devq;
4344
4345         dev = (struct cam_ed *)arg;
4346         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4347         devq = dev->sim->devq;
4348         mtx_assert(&devq->send_mtx, MA_OWNED);
4349         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4350                 xpt_run_devq(devq);
4351 }
4352
4353 void
4354 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4355 {
4356         struct cam_ed *dev;
4357         struct cam_devq *devq;
4358
4359         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4360             count, run_queue));
4361         dev = path->device;
4362         devq = dev->sim->devq;
4363         mtx_lock(&devq->send_mtx);
4364         if (xpt_release_devq_device(dev, count, run_queue))
4365                 xpt_run_devq(dev->sim->devq);
4366         mtx_unlock(&devq->send_mtx);
4367 }
4368
4369 static int
4370 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4371 {
4372
4373         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4374         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4375             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4376             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4377         if (count > dev->ccbq.queue.qfrozen_cnt) {
4378 #ifdef INVARIANTS
4379                 printf("xpt_release_devq(): requested %u > present %u\n",
4380                     count, dev->ccbq.queue.qfrozen_cnt);
4381 #endif
4382                 count = dev->ccbq.queue.qfrozen_cnt;
4383         }
4384         dev->ccbq.queue.qfrozen_cnt -= count;
4385         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4386                 /*
4387                  * No longer need to wait for a successful
4388                  * command completion.
4389                  */
4390                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4391                 /*
4392                  * Remove any timeouts that might be scheduled
4393                  * to release this queue.
4394                  */
4395                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4396                         callout_stop(&dev->callout);
4397                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4398                 }
4399                 /*
4400                  * Now that we are unfrozen schedule the
4401                  * device so any pending transactions are
4402                  * run.
4403                  */
4404                 xpt_schedule_devq(dev->sim->devq, dev);
4405         } else
4406                 run_queue = 0;
4407         return (run_queue);
4408 }
4409
4410 void
4411 xpt_release_simq(struct cam_sim *sim, int run_queue)
4412 {
4413         struct cam_devq *devq;
4414
4415         devq = sim->devq;
4416         mtx_lock(&devq->send_mtx);
4417         if (devq->send_queue.qfrozen_cnt <= 0) {
4418 #ifdef INVARIANTS
4419                 printf("xpt_release_simq: requested 1 > present %u\n",
4420                     devq->send_queue.qfrozen_cnt);
4421 #endif
4422         } else
4423                 devq->send_queue.qfrozen_cnt--;
4424         if (devq->send_queue.qfrozen_cnt == 0) {
4425                 /*
4426                  * If there is a timeout scheduled to release this
4427                  * sim queue, remove it.  The queue frozen count is
4428                  * already at 0.
4429                  */
4430                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4431                         callout_stop(&sim->callout);
4432                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4433                 }
4434                 if (run_queue) {
4435                         /*
4436                          * Now that we are unfrozen run the send queue.
4437                          */
4438                         xpt_run_devq(sim->devq);
4439                 }
4440         }
4441         mtx_unlock(&devq->send_mtx);
4442 }
4443
4444 /*
4445  * XXX Appears to be unused.
4446  */
4447 static void
4448 xpt_release_simq_timeout(void *arg)
4449 {
4450         struct cam_sim *sim;
4451
4452         sim = (struct cam_sim *)arg;
4453         xpt_release_simq(sim, /* run_queue */ TRUE);
4454 }
4455
4456 void
4457 xpt_done(union ccb *done_ccb)
4458 {
4459         struct cam_doneq *queue;
4460         int     run, hash;
4461
4462         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4463             ("xpt_done: func= %#x %s status %#x\n",
4464                 done_ccb->ccb_h.func_code,
4465                 xpt_action_name(done_ccb->ccb_h.func_code),
4466                 done_ccb->ccb_h.status));
4467         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4468                 return;
4469
4470         /* Store the time the ccb was in the sim */
4471         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4472         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4473             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4474         queue = &cam_doneqs[hash];
4475         mtx_lock(&queue->cam_doneq_mtx);
4476         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4477         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4478         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4479         mtx_unlock(&queue->cam_doneq_mtx);
4480         if (run)
4481                 wakeup(&queue->cam_doneq);
4482 }
4483
4484 void
4485 xpt_done_direct(union ccb *done_ccb)
4486 {
4487
4488         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4489             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4490         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4491                 return;
4492
4493         /* Store the time the ccb was in the sim */
4494         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4495         xpt_done_process(&done_ccb->ccb_h);
4496 }
4497
4498 union ccb *
4499 xpt_alloc_ccb()
4500 {
4501         union ccb *new_ccb;
4502
4503         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4504         return (new_ccb);
4505 }
4506
4507 union ccb *
4508 xpt_alloc_ccb_nowait()
4509 {
4510         union ccb *new_ccb;
4511
4512         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4513         return (new_ccb);
4514 }
4515
4516 void
4517 xpt_free_ccb(union ccb *free_ccb)
4518 {
4519         free(free_ccb, M_CAMCCB);
4520 }
4521
4522
4523
4524 /* Private XPT functions */
4525
4526 /*
4527  * Get a CAM control block for the caller. Charge the structure to the device
4528  * referenced by the path.  If we don't have sufficient resources to allocate
4529  * more ccbs, we return NULL.
4530  */
4531 static union ccb *
4532 xpt_get_ccb_nowait(struct cam_periph *periph)
4533 {
4534         union ccb *new_ccb;
4535
4536         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4537         if (new_ccb == NULL)
4538                 return (NULL);
4539         periph->periph_allocated++;
4540         cam_ccbq_take_opening(&periph->path->device->ccbq);
4541         return (new_ccb);
4542 }
4543
4544 static union ccb *
4545 xpt_get_ccb(struct cam_periph *periph)
4546 {
4547         union ccb *new_ccb;
4548
4549         cam_periph_unlock(periph);
4550         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4551         cam_periph_lock(periph);
4552         periph->periph_allocated++;
4553         cam_ccbq_take_opening(&periph->path->device->ccbq);
4554         return (new_ccb);
4555 }
4556
4557 union ccb *
4558 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4559 {
4560         struct ccb_hdr *ccb_h;
4561
4562         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4563         cam_periph_assert(periph, MA_OWNED);
4564         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4565             ccb_h->pinfo.priority != priority) {
4566                 if (priority < periph->immediate_priority) {
4567                         periph->immediate_priority = priority;
4568                         xpt_run_allocq(periph, 0);
4569                 } else
4570                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4571                             "cgticb", 0);
4572         }
4573         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4574         return ((union ccb *)ccb_h);
4575 }
4576
4577 static void
4578 xpt_acquire_bus(struct cam_eb *bus)
4579 {
4580
4581         xpt_lock_buses();
4582         bus->refcount++;
4583         xpt_unlock_buses();
4584 }
4585
4586 static void
4587 xpt_release_bus(struct cam_eb *bus)
4588 {
4589
4590         xpt_lock_buses();
4591         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4592         if (--bus->refcount > 0) {
4593                 xpt_unlock_buses();
4594                 return;
4595         }
4596         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4597         xsoftc.bus_generation++;
4598         xpt_unlock_buses();
4599         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4600             ("destroying bus, but target list is not empty"));
4601         cam_sim_release(bus->sim);
4602         mtx_destroy(&bus->eb_mtx);
4603         free(bus, M_CAMXPT);
4604 }
4605
4606 static struct cam_et *
4607 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4608 {
4609         struct cam_et *cur_target, *target;
4610
4611         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4612         mtx_assert(&bus->eb_mtx, MA_OWNED);
4613         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4614                                          M_NOWAIT|M_ZERO);
4615         if (target == NULL)
4616                 return (NULL);
4617
4618         TAILQ_INIT(&target->ed_entries);
4619         target->bus = bus;
4620         target->target_id = target_id;
4621         target->refcount = 1;
4622         target->generation = 0;
4623         target->luns = NULL;
4624         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4625         timevalclear(&target->last_reset);
4626         /*
4627          * Hold a reference to our parent bus so it
4628          * will not go away before we do.
4629          */
4630         bus->refcount++;
4631
4632         /* Insertion sort into our bus's target list */
4633         cur_target = TAILQ_FIRST(&bus->et_entries);
4634         while (cur_target != NULL && cur_target->target_id < target_id)
4635                 cur_target = TAILQ_NEXT(cur_target, links);
4636         if (cur_target != NULL) {
4637                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4638         } else {
4639                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4640         }
4641         bus->generation++;
4642         return (target);
4643 }
4644
4645 static void
4646 xpt_acquire_target(struct cam_et *target)
4647 {
4648         struct cam_eb *bus = target->bus;
4649
4650         mtx_lock(&bus->eb_mtx);
4651         target->refcount++;
4652         mtx_unlock(&bus->eb_mtx);
4653 }
4654
4655 static void
4656 xpt_release_target(struct cam_et *target)
4657 {
4658         struct cam_eb *bus = target->bus;
4659
4660         mtx_lock(&bus->eb_mtx);
4661         if (--target->refcount > 0) {
4662                 mtx_unlock(&bus->eb_mtx);
4663                 return;
4664         }
4665         TAILQ_REMOVE(&bus->et_entries, target, links);
4666         bus->generation++;
4667         mtx_unlock(&bus->eb_mtx);
4668         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4669             ("destroying target, but device list is not empty"));
4670         xpt_release_bus(bus);
4671         mtx_destroy(&target->luns_mtx);
4672         if (target->luns)
4673                 free(target->luns, M_CAMXPT);
4674         free(target, M_CAMXPT);
4675 }
4676
4677 static struct cam_ed *
4678 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4679                          lun_id_t lun_id)
4680 {
4681         struct cam_ed *device;
4682
4683         device = xpt_alloc_device(bus, target, lun_id);
4684         if (device == NULL)
4685                 return (NULL);
4686
4687         device->mintags = 1;
4688         device->maxtags = 1;
4689         return (device);
4690 }
4691
4692 static void
4693 xpt_destroy_device(void *context, int pending)
4694 {
4695         struct cam_ed   *device = context;
4696
4697         mtx_lock(&device->device_mtx);
4698         mtx_destroy(&device->device_mtx);
4699         free(device, M_CAMDEV);
4700 }
4701
4702 struct cam_ed *
4703 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4704 {
4705         struct cam_ed   *cur_device, *device;
4706         struct cam_devq *devq;
4707         cam_status status;
4708
4709         mtx_assert(&bus->eb_mtx, MA_OWNED);
4710         /* Make space for us in the device queue on our bus */
4711         devq = bus->sim->devq;
4712         mtx_lock(&devq->send_mtx);
4713         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4714         mtx_unlock(&devq->send_mtx);
4715         if (status != CAM_REQ_CMP)
4716                 return (NULL);
4717
4718         device = (struct cam_ed *)malloc(sizeof(*device),
4719                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4720         if (device == NULL)
4721                 return (NULL);
4722
4723         cam_init_pinfo(&device->devq_entry);
4724         device->target = target;
4725         device->lun_id = lun_id;
4726         device->sim = bus->sim;
4727         if (cam_ccbq_init(&device->ccbq,
4728                           bus->sim->max_dev_openings) != 0) {
4729                 free(device, M_CAMDEV);
4730                 return (NULL);
4731         }
4732         SLIST_INIT(&device->asyncs);
4733         SLIST_INIT(&device->periphs);
4734         device->generation = 0;
4735         device->flags = CAM_DEV_UNCONFIGURED;
4736         device->tag_delay_count = 0;
4737         device->tag_saved_openings = 0;
4738         device->refcount = 1;
4739         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4740         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4741         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4742         /*
4743          * Hold a reference to our parent bus so it
4744          * will not go away before we do.
4745          */
4746         target->refcount++;
4747
4748         cur_device = TAILQ_FIRST(&target->ed_entries);
4749         while (cur_device != NULL && cur_device->lun_id < lun_id)
4750                 cur_device = TAILQ_NEXT(cur_device, links);
4751         if (cur_device != NULL)
4752                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4753         else
4754                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4755         target->generation++;
4756         return (device);
4757 }
4758
4759 void
4760 xpt_acquire_device(struct cam_ed *device)
4761 {
4762         struct cam_eb *bus = device->target->bus;
4763
4764         mtx_lock(&bus->eb_mtx);
4765         device->refcount++;
4766         mtx_unlock(&bus->eb_mtx);
4767 }
4768
4769 void
4770 xpt_release_device(struct cam_ed *device)
4771 {
4772         struct cam_eb *bus = device->target->bus;
4773         struct cam_devq *devq;
4774
4775         mtx_lock(&bus->eb_mtx);
4776         if (--device->refcount > 0) {
4777                 mtx_unlock(&bus->eb_mtx);
4778                 return;
4779         }
4780
4781         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4782         device->target->generation++;
4783         mtx_unlock(&bus->eb_mtx);
4784
4785         /* Release our slot in the devq */
4786         devq = bus->sim->devq;
4787         mtx_lock(&devq->send_mtx);
4788         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4789         mtx_unlock(&devq->send_mtx);
4790
4791         KASSERT(SLIST_EMPTY(&device->periphs),
4792             ("destroying device, but periphs list is not empty"));
4793         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4794             ("destroying device while still queued for ccbs"));
4795
4796         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4797                 callout_stop(&device->callout);
4798
4799         xpt_release_target(device->target);
4800
4801         cam_ccbq_fini(&device->ccbq);
4802         /*
4803          * Free allocated memory.  free(9) does nothing if the
4804          * supplied pointer is NULL, so it is safe to call without
4805          * checking.
4806          */
4807         free(device->supported_vpds, M_CAMXPT);
4808         free(device->device_id, M_CAMXPT);
4809         free(device->ext_inq, M_CAMXPT);
4810         free(device->physpath, M_CAMXPT);
4811         free(device->rcap_buf, M_CAMXPT);
4812         free(device->serial_num, M_CAMXPT);
4813         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4814 }
4815
4816 u_int32_t
4817 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4818 {
4819         int     result;
4820         struct  cam_ed *dev;
4821
4822         dev = path->device;
4823         mtx_lock(&dev->sim->devq->send_mtx);
4824         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4825         mtx_unlock(&dev->sim->devq->send_mtx);
4826         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4827          || (dev->inq_flags & SID_CmdQue) != 0)
4828                 dev->tag_saved_openings = newopenings;
4829         return (result);
4830 }
4831
4832 static struct cam_eb *
4833 xpt_find_bus(path_id_t path_id)
4834 {
4835         struct cam_eb *bus;
4836
4837         xpt_lock_buses();
4838         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4839              bus != NULL;
4840              bus = TAILQ_NEXT(bus, links)) {
4841                 if (bus->path_id == path_id) {
4842                         bus->refcount++;
4843                         break;
4844                 }
4845         }
4846         xpt_unlock_buses();
4847         return (bus);
4848 }
4849
4850 static struct cam_et *
4851 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4852 {
4853         struct cam_et *target;
4854
4855         mtx_assert(&bus->eb_mtx, MA_OWNED);
4856         for (target = TAILQ_FIRST(&bus->et_entries);
4857              target != NULL;
4858              target = TAILQ_NEXT(target, links)) {
4859                 if (target->target_id == target_id) {
4860                         target->refcount++;
4861                         break;
4862                 }
4863         }
4864         return (target);
4865 }
4866
4867 static struct cam_ed *
4868 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4869 {
4870         struct cam_ed *device;
4871
4872         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4873         for (device = TAILQ_FIRST(&target->ed_entries);
4874              device != NULL;
4875              device = TAILQ_NEXT(device, links)) {
4876                 if (device->lun_id == lun_id) {
4877                         device->refcount++;
4878                         break;
4879                 }
4880         }
4881         return (device);
4882 }
4883
4884 void
4885 xpt_start_tags(struct cam_path *path)
4886 {
4887         struct ccb_relsim crs;
4888         struct cam_ed *device;
4889         struct cam_sim *sim;
4890         int    newopenings;
4891
4892         device = path->device;
4893         sim = path->bus->sim;
4894         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4895         xpt_freeze_devq(path, /*count*/1);
4896         device->inq_flags |= SID_CmdQue;
4897         if (device->tag_saved_openings != 0)
4898                 newopenings = device->tag_saved_openings;
4899         else
4900                 newopenings = min(device->maxtags,
4901                                   sim->max_tagged_dev_openings);
4902         xpt_dev_ccbq_resize(path, newopenings);
4903         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4904         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4905         crs.ccb_h.func_code = XPT_REL_SIMQ;
4906         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4907         crs.openings
4908             = crs.release_timeout
4909             = crs.qfrozen_cnt
4910             = 0;
4911         xpt_action((union ccb *)&crs);
4912 }
4913
4914 void
4915 xpt_stop_tags(struct cam_path *path)
4916 {
4917         struct ccb_relsim crs;
4918         struct cam_ed *device;
4919         struct cam_sim *sim;
4920
4921         device = path->device;
4922         sim = path->bus->sim;
4923         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4924         device->tag_delay_count = 0;
4925         xpt_freeze_devq(path, /*count*/1);
4926         device->inq_flags &= ~SID_CmdQue;
4927         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4928         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4929         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4930         crs.ccb_h.func_code = XPT_REL_SIMQ;
4931         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4932         crs.openings
4933             = crs.release_timeout
4934             = crs.qfrozen_cnt
4935             = 0;
4936         xpt_action((union ccb *)&crs);
4937 }
4938
4939 static void
4940 xpt_boot_delay(void *arg)
4941 {
4942
4943         xpt_release_boot();
4944 }
4945
4946 static void
4947 xpt_config(void *arg)
4948 {
4949         /*
4950          * Now that interrupts are enabled, go find our devices
4951          */
4952         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4953                 printf("xpt_config: failed to create taskqueue thread.\n");
4954
4955         /* Setup debugging path */
4956         if (cam_dflags != CAM_DEBUG_NONE) {
4957                 if (xpt_create_path(&cam_dpath, NULL,
4958                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4959                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4960                         printf("xpt_config: xpt_create_path() failed for debug"
4961                                " target %d:%d:%d, debugging disabled\n",
4962                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4963                         cam_dflags = CAM_DEBUG_NONE;
4964                 }
4965         } else
4966                 cam_dpath = NULL;
4967
4968         periphdriver_init(1);
4969         xpt_hold_boot();
4970         callout_init(&xsoftc.boot_callout, 1);
4971         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4972             xpt_boot_delay, NULL, 0);
4973         /* Fire up rescan thread. */
4974         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4975             "cam", "scanner")) {
4976                 printf("xpt_config: failed to create rescan thread.\n");
4977         }
4978 }
4979
4980 void
4981 xpt_hold_boot(void)
4982 {
4983         xpt_lock_buses();
4984         xsoftc.buses_to_config++;
4985         xpt_unlock_buses();
4986 }
4987
4988 void
4989 xpt_release_boot(void)
4990 {
4991         xpt_lock_buses();
4992         xsoftc.buses_to_config--;
4993         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4994                 struct  xpt_task *task;
4995
4996                 xsoftc.buses_config_done = 1;
4997                 xpt_unlock_buses();
4998                 /* Call manually because we don't have any busses */
4999                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5000                 if (task != NULL) {
5001                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5002                         taskqueue_enqueue(taskqueue_thread, &task->task);
5003                 }
5004         } else
5005                 xpt_unlock_buses();
5006 }
5007
5008 /*
5009  * If the given device only has one peripheral attached to it, and if that
5010  * peripheral is the passthrough driver, announce it.  This insures that the
5011  * user sees some sort of announcement for every peripheral in their system.
5012  */
5013 static int
5014 xptpassannouncefunc(struct cam_ed *device, void *arg)
5015 {
5016         struct cam_periph *periph;
5017         int i;
5018
5019         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5020              periph = SLIST_NEXT(periph, periph_links), i++);
5021
5022         periph = SLIST_FIRST(&device->periphs);
5023         if ((i == 1)
5024          && (strncmp(periph->periph_name, "pass", 4) == 0))
5025                 xpt_announce_periph(periph, NULL);
5026
5027         return(1);
5028 }
5029
5030 static void
5031 xpt_finishconfig_task(void *context, int pending)
5032 {
5033
5034         periphdriver_init(2);
5035         /*
5036          * Check for devices with no "standard" peripheral driver
5037          * attached.  For any devices like that, announce the
5038          * passthrough driver so the user will see something.
5039          */
5040         if (!bootverbose)
5041                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5042
5043         /* Release our hook so that the boot can continue. */
5044         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5045         free(xsoftc.xpt_config_hook, M_CAMXPT);
5046         xsoftc.xpt_config_hook = NULL;
5047
5048         free(context, M_CAMXPT);
5049 }
5050
5051 cam_status
5052 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5053                    struct cam_path *path)
5054 {
5055         struct ccb_setasync csa;
5056         cam_status status;
5057         int xptpath = 0;
5058
5059         if (path == NULL) {
5060                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5061                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5062                 if (status != CAM_REQ_CMP)
5063                         return (status);
5064                 xpt_path_lock(path);
5065                 xptpath = 1;
5066         }
5067
5068         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5069         csa.ccb_h.func_code = XPT_SASYNC_CB;
5070         csa.event_enable = event;
5071         csa.callback = cbfunc;
5072         csa.callback_arg = cbarg;
5073         xpt_action((union ccb *)&csa);
5074         status = csa.ccb_h.status;
5075
5076         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5077             ("xpt_register_async: func %p\n", cbfunc));
5078
5079         if (xptpath) {
5080                 xpt_path_unlock(path);
5081                 xpt_free_path(path);
5082         }
5083
5084         if ((status == CAM_REQ_CMP) &&
5085             (csa.event_enable & AC_FOUND_DEVICE)) {
5086                 /*
5087                  * Get this peripheral up to date with all
5088                  * the currently existing devices.
5089                  */
5090                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5091         }
5092         if ((status == CAM_REQ_CMP) &&
5093             (csa.event_enable & AC_PATH_REGISTERED)) {
5094                 /*
5095                  * Get this peripheral up to date with all
5096                  * the currently existing busses.
5097                  */
5098                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5099         }
5100
5101         return (status);
5102 }
5103
5104 static void
5105 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5106 {
5107         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5108
5109         switch (work_ccb->ccb_h.func_code) {
5110         /* Common cases first */
5111         case XPT_PATH_INQ:              /* Path routing inquiry */
5112         {
5113                 struct ccb_pathinq *cpi;
5114
5115                 cpi = &work_ccb->cpi;
5116                 cpi->version_num = 1; /* XXX??? */
5117                 cpi->hba_inquiry = 0;
5118                 cpi->target_sprt = 0;
5119                 cpi->hba_misc = 0;
5120                 cpi->hba_eng_cnt = 0;
5121                 cpi->max_target = 0;
5122                 cpi->max_lun = 0;
5123                 cpi->initiator_id = 0;
5124                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5125                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5126                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5127                 cpi->unit_number = sim->unit_number;
5128                 cpi->bus_id = sim->bus_id;
5129                 cpi->base_transfer_speed = 0;
5130                 cpi->protocol = PROTO_UNSPECIFIED;
5131                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5132                 cpi->transport = XPORT_UNSPECIFIED;
5133                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5134                 cpi->ccb_h.status = CAM_REQ_CMP;
5135                 xpt_done(work_ccb);
5136                 break;
5137         }
5138         default:
5139                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5140                 xpt_done(work_ccb);
5141                 break;
5142         }
5143 }
5144
5145 /*
5146  * The xpt as a "controller" has no interrupt sources, so polling
5147  * is a no-op.
5148  */
5149 static void
5150 xptpoll(struct cam_sim *sim)
5151 {
5152 }
5153
5154 void
5155 xpt_lock_buses(void)
5156 {
5157         mtx_lock(&xsoftc.xpt_topo_lock);
5158 }
5159
5160 void
5161 xpt_unlock_buses(void)
5162 {
5163         mtx_unlock(&xsoftc.xpt_topo_lock);
5164 }
5165
5166 struct mtx *
5167 xpt_path_mtx(struct cam_path *path)
5168 {
5169
5170         return (&path->device->device_mtx);
5171 }
5172
5173 static void
5174 xpt_done_process(struct ccb_hdr *ccb_h)
5175 {
5176         struct cam_sim *sim;
5177         struct cam_devq *devq;
5178         struct mtx *mtx = NULL;
5179
5180         if (ccb_h->flags & CAM_HIGH_POWER) {
5181                 struct highpowerlist    *hphead;
5182                 struct cam_ed           *device;
5183
5184                 mtx_lock(&xsoftc.xpt_highpower_lock);
5185                 hphead = &xsoftc.highpowerq;
5186
5187                 device = STAILQ_FIRST(hphead);
5188
5189                 /*
5190                  * Increment the count since this command is done.
5191                  */
5192                 xsoftc.num_highpower++;
5193
5194                 /*
5195                  * Any high powered commands queued up?
5196                  */
5197                 if (device != NULL) {
5198
5199                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5200                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5201
5202                         mtx_lock(&device->sim->devq->send_mtx);
5203                         xpt_release_devq_device(device,
5204                                          /*count*/1, /*runqueue*/TRUE);
5205                         mtx_unlock(&device->sim->devq->send_mtx);
5206                 } else
5207                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5208         }
5209
5210         sim = ccb_h->path->bus->sim;
5211
5212         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5213                 xpt_release_simq(sim, /*run_queue*/FALSE);
5214                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5215         }
5216
5217         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5218          && (ccb_h->status & CAM_DEV_QFRZN)) {
5219                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5220                 ccb_h->status &= ~CAM_DEV_QFRZN;
5221         }
5222
5223         devq = sim->devq;
5224         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5225                 struct cam_ed *dev = ccb_h->path->device;
5226
5227                 mtx_lock(&devq->send_mtx);
5228                 devq->send_active--;
5229                 devq->send_openings++;
5230                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5231
5232                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5233                   && (dev->ccbq.dev_active == 0))) {
5234                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5235                         xpt_release_devq_device(dev, /*count*/1,
5236                                          /*run_queue*/FALSE);
5237                 }
5238
5239                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5240                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5241                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5242                         xpt_release_devq_device(dev, /*count*/1,
5243                                          /*run_queue*/FALSE);
5244                 }
5245
5246                 if (!device_is_queued(dev))
5247                         (void)xpt_schedule_devq(devq, dev);
5248                 xpt_run_devq(devq);
5249                 mtx_unlock(&devq->send_mtx);
5250
5251                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5252                         mtx = xpt_path_mtx(ccb_h->path);
5253                         mtx_lock(mtx);
5254
5255                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5256                          && (--dev->tag_delay_count == 0))
5257                                 xpt_start_tags(ccb_h->path);
5258                 }
5259         }
5260
5261         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5262                 if (mtx == NULL) {
5263                         mtx = xpt_path_mtx(ccb_h->path);
5264                         mtx_lock(mtx);
5265                 }
5266         } else {
5267                 if (mtx != NULL) {
5268                         mtx_unlock(mtx);
5269                         mtx = NULL;
5270                 }
5271         }
5272
5273         /* Call the peripheral driver's callback */
5274         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5275         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5276         if (mtx != NULL)
5277                 mtx_unlock(mtx);
5278 }
5279
5280 void
5281 xpt_done_td(void *arg)
5282 {
5283         struct cam_doneq *queue = arg;
5284         struct ccb_hdr *ccb_h;
5285         STAILQ_HEAD(, ccb_hdr)  doneq;
5286
5287         STAILQ_INIT(&doneq);
5288         mtx_lock(&queue->cam_doneq_mtx);
5289         while (1) {
5290                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5291                         queue->cam_doneq_sleep = 1;
5292                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5293                             PRIBIO, "-", 0);
5294                         queue->cam_doneq_sleep = 0;
5295                 }
5296                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5297                 mtx_unlock(&queue->cam_doneq_mtx);
5298
5299                 THREAD_NO_SLEEPING();
5300                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5301                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5302                         xpt_done_process(ccb_h);
5303                 }
5304                 THREAD_SLEEPING_OK();
5305
5306                 mtx_lock(&queue->cam_doneq_mtx);
5307         }
5308 }
5309
5310 static void
5311 camisr_runqueue(void)
5312 {
5313         struct  ccb_hdr *ccb_h;
5314         struct cam_doneq *queue;
5315         int i;
5316
5317         /* Process global queues. */
5318         for (i = 0; i < cam_num_doneqs; i++) {
5319                 queue = &cam_doneqs[i];
5320                 mtx_lock(&queue->cam_doneq_mtx);
5321                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5322                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5323                         mtx_unlock(&queue->cam_doneq_mtx);
5324                         xpt_done_process(ccb_h);
5325                         mtx_lock(&queue->cam_doneq_mtx);
5326                 }
5327                 mtx_unlock(&queue->cam_doneq_mtx);
5328         }
5329 }
5330
5331 struct kv
5332 {
5333         uint32_t v;
5334         const char *name;
5335 };
5336
5337 static struct kv map[] = {
5338         { XPT_NOOP, "XPT_NOOP" },
5339         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5340         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5341         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5342         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5343         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5344         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5345         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5346         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5347         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5348         { XPT_DEBUG, "XPT_DEBUG" },
5349         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5350         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5351         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5352         { XPT_ASYNC, "XPT_ASYNC" },
5353         { XPT_ABORT, "XPT_ABORT" },
5354         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5355         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5356         { XPT_TERM_IO, "XPT_TERM_IO" },
5357         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5358         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5359         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5360         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5361         { XPT_ATA_IO, "XPT_ATA_IO" },
5362         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5363         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5364         { XPT_NVME_IO, "XPT_NVME_IO" },
5365         { XPT_SMP_IO, "XPT_SMP_IO" },
5366         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5367         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5368         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5369         { XPT_EN_LUN, "XPT_EN_LUN" },
5370         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5371         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5372         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5373         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5374         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5375         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5376         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5377         { 0, 0 }
5378 };
5379
5380 static const char *
5381 xpt_action_name(uint32_t action)
5382 {
5383         static char buffer[32]; /* Only for unknown messages -- racy */
5384         struct kv *walker = map;
5385
5386         while (walker->name != NULL) {
5387                 if (walker->v == action)
5388                         return (walker->name);
5389                 walker++;
5390         }
5391
5392         snprintf(buffer, sizeof(buffer), "%#x", action);
5393         return (buffer);
5394 }