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