sys/cam/cam_xpt.c

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