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