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