sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   5  *
   6  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   7  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "opt_printf.h"
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/bio.h>
  39 #include <sys/bus.h>
  40 #include <sys/systm.h>
  41 #include <sys/types.h>
  42 #include <sys/malloc.h>
  43 #include <sys/kernel.h>
  44 #include <sys/time.h>
  45 #include <sys/conf.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/proc.h>
  48 #include <sys/sbuf.h>
  49 #include <sys/smp.h>
  50 #include <sys/taskqueue.h>
  51
  52 #include <sys/lock.h>
  53 #include <sys/mutex.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/kthread.h>
  56
  57 #include <cam/cam.h>
  58 #include <cam/cam_ccb.h>
  59 #include <cam/cam_iosched.h>
  60 #include <cam/cam_periph.h>
  61 #include <cam/cam_queue.h>
  62 #include <cam/cam_sim.h>
  63 #include <cam/cam_xpt.h>
  64 #include <cam/cam_xpt_sim.h>
  65 #include <cam/cam_xpt_periph.h>
  66 #include <cam/cam_xpt_internal.h>
  67 #include <cam/cam_debug.h>
  68 #include <cam/cam_compat.h>
  69
  70 #include <cam/scsi/scsi_all.h>
  71 #include <cam/scsi/scsi_message.h>
  72 #include <cam/scsi/scsi_pass.h>
  73
  74 #include <machine/md_var.h>     /* geometry translation */
  75 #include <machine/stdarg.h>     /* for xpt_print below */
  76
  77 #include "opt_cam.h"
  78
  79 /* Wild guess based on not wanting to grow the stack too much */
  80 #define XPT_PRINT_MAXLEN        512
  81 #ifdef PRINTF_BUFR_SIZE
  82 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  83 #else
  84 #define XPT_PRINT_LEN   128
  85 #endif
  86 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  87
  88 /*
  89  * This is the maximum number of high powered commands (e.g. start unit)
  90  * that can be outstanding at a particular time.
  91  */
  92 #ifndef CAM_MAX_HIGHPOWER
  93 #define CAM_MAX_HIGHPOWER  4
  94 #endif
  95
  96 /* Datastructures internal to the xpt layer */
  97 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  98 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  99 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
 100 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
 101
 102 /* Object for defering XPT actions to a taskqueue */
 103 struct xpt_task {
 104         struct task     task;
 105         void            *data1;
 106         uintptr_t       data2;
 107 };
 108
 109 struct xpt_softc {
 110         uint32_t                xpt_generation;
 111
 112         /* number of high powered commands that can go through right now */
 113         struct mtx              xpt_highpower_lock;
 114         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 115         int                     num_highpower;
 116
 117         /* queue for handling async rescan requests. */
 118         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 119         int buses_to_config;
 120         int buses_config_done;
 121         int announce_nosbuf;
 122
 123         /*
 124          * Registered buses
 125          *
 126          * N.B., "busses" is an archaic spelling of "buses".  In new code
 127          * "buses" is preferred.
 128          */
 129         TAILQ_HEAD(,cam_eb)     xpt_busses;
 130         u_int                   bus_generation;
 131
 132         struct intr_config_hook xpt_config_hook;
 133
 134         int                     boot_delay;
 135         struct callout          boot_callout;
 136
 137         struct mtx              xpt_topo_lock;
 138         struct mtx              xpt_lock;
 139         struct taskqueue        *xpt_taskq;
 140 };
 141
 142 typedef enum {
 143         DM_RET_COPY             = 0x01,
 144         DM_RET_FLAG_MASK        = 0x0f,
 145         DM_RET_NONE             = 0x00,
 146         DM_RET_STOP             = 0x10,
 147         DM_RET_DESCEND          = 0x20,
 148         DM_RET_ERROR            = 0x30,
 149         DM_RET_ACTION_MASK      = 0xf0
 150 } dev_match_ret;
 151
 152 typedef enum {
 153         XPT_DEPTH_BUS,
 154         XPT_DEPTH_TARGET,
 155         XPT_DEPTH_DEVICE,
 156         XPT_DEPTH_PERIPH
 157 } xpt_traverse_depth;
 158
 159 struct xpt_traverse_config {
 160         xpt_traverse_depth      depth;
 161         void                    *tr_func;
 162         void                    *tr_arg;
 163 };
 164
 165 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 166 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 167 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 168 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 169 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 170
 171 /* Transport layer configuration information */
 172 static struct xpt_softc xsoftc;
 173
 174 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 175
 176 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 177            &xsoftc.boot_delay, 0, "Bus registration wait time");
 178 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 179             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 180 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 181             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 182
 183 struct cam_doneq {
 184         struct mtx_padalign     cam_doneq_mtx;
 185         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 186         int                     cam_doneq_sleep;
 187 };
 188
 189 static struct cam_doneq cam_doneqs[MAXCPU];
 190 static int cam_num_doneqs;
 191 static struct proc *cam_proc;
 192
 193 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 194            &cam_num_doneqs, 0, "Number of completion queues/threads");
 195
 196 struct cam_periph *xpt_periph;
 197
 198 static periph_init_t xpt_periph_init;
 199
 200 static struct periph_driver xpt_driver =
 201 {
 202         xpt_periph_init, "xpt",
 203         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 204         CAM_PERIPH_DRV_EARLY
 205 };
 206
 207 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 208
 209 static d_open_t xptopen;
 210 static d_close_t xptclose;
 211 static d_ioctl_t xptioctl;
 212 static d_ioctl_t xptdoioctl;
 213
 214 static struct cdevsw xpt_cdevsw = {
 215         .d_version =    D_VERSION,
 216         .d_flags =      0,
 217         .d_open =       xptopen,
 218         .d_close =      xptclose,
 219         .d_ioctl =      xptioctl,
 220         .d_name =       "xpt",
 221 };
 222
 223 /* Storage for debugging datastructures */
 224 struct cam_path *cam_dpath;
 225 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 226 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 227         &cam_dflags, 0, "Enabled debug flags");
 228 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 229 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 230         &cam_debug_delay, 0, "Delay in us after each debug message");
 231
 232 /* Our boot-time initialization hook */
 233 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 234
 235 static moduledata_t cam_moduledata = {
 236         "cam",
 237         cam_module_event_handler,
 238         NULL
 239 };
 240
 241 static int      xpt_init(void *);
 242
 243 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 244 MODULE_VERSION(cam, 1);
 245
 246
 247 static void             xpt_async_bcast(struct async_list *async_head,
 248                                         u_int32_t async_code,
 249                                         struct cam_path *path,
 250                                         void *async_arg);
 251 static path_id_t xptnextfreepathid(void);
 252 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 253 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 254 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 255 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 256 static void      xpt_run_allocq_task(void *context, int pending);
 257 static void      xpt_run_devq(struct cam_devq *devq);
 258 static timeout_t xpt_release_devq_timeout;
 259 static void      xpt_release_simq_timeout(void *arg) __unused;
 260 static void      xpt_acquire_bus(struct cam_eb *bus);
 261 static void      xpt_release_bus(struct cam_eb *bus);
 262 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 263 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 264                     int run_queue);
 265 static struct cam_et*
 266                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 267 static void      xpt_acquire_target(struct cam_et *target);
 268 static void      xpt_release_target(struct cam_et *target);
 269 static struct cam_eb*
 270                  xpt_find_bus(path_id_t path_id);
 271 static struct cam_et*
 272                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 273 static struct cam_ed*
 274                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 275 static void      xpt_config(void *arg);
 276 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 277                                  u_int32_t new_priority);
 278 static xpt_devicefunc_t xptpassannouncefunc;
 279 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 280 static void      xptpoll(struct cam_sim *sim);
 281 static void      camisr_runqueue(void);
 282 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 283 static void      xpt_done_td(void *);
 284 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 285                                     u_int num_patterns, struct cam_eb *bus);
 286 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 287                                        u_int num_patterns,
 288                                        struct cam_ed *device);
 289 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 290                                        u_int num_patterns,
 291                                        struct cam_periph *periph);
 292 static xpt_busfunc_t    xptedtbusfunc;
 293 static xpt_targetfunc_t xptedttargetfunc;
 294 static xpt_devicefunc_t xptedtdevicefunc;
 295 static xpt_periphfunc_t xptedtperiphfunc;
 296 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 297 static xpt_periphfunc_t xptplistperiphfunc;
 298 static int              xptedtmatch(struct ccb_dev_match *cdm);
 299 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 300 static int              xptbustraverse(struct cam_eb *start_bus,
 301                                        xpt_busfunc_t *tr_func, void *arg);
 302 static int              xpttargettraverse(struct cam_eb *bus,
 303                                           struct cam_et *start_target,
 304                                           xpt_targetfunc_t *tr_func, void *arg);
 305 static int              xptdevicetraverse(struct cam_et *target,
 306                                           struct cam_ed *start_device,
 307                                           xpt_devicefunc_t *tr_func, void *arg);
 308 static int              xptperiphtraverse(struct cam_ed *device,
 309                                           struct cam_periph *start_periph,
 310                                           xpt_periphfunc_t *tr_func, void *arg);
 311 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 312                                         xpt_pdrvfunc_t *tr_func, void *arg);
 313 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 314                                             struct cam_periph *start_periph,
 315                                             xpt_periphfunc_t *tr_func,
 316                                             void *arg);
 317 static xpt_busfunc_t    xptdefbusfunc;
 318 static xpt_targetfunc_t xptdeftargetfunc;
 319 static xpt_devicefunc_t xptdefdevicefunc;
 320 static xpt_periphfunc_t xptdefperiphfunc;
 321 static void             xpt_finishconfig_task(void *context, int pending);
 322 static void             xpt_dev_async_default(u_int32_t async_code,
 323                                               struct cam_eb *bus,
 324                                               struct cam_et *target,
 325                                               struct cam_ed *device,
 326                                               void *async_arg);
 327 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 328                                                  struct cam_et *target,
 329                                                  lun_id_t lun_id);
 330 static xpt_devicefunc_t xptsetasyncfunc;
 331 static xpt_busfunc_t    xptsetasyncbusfunc;
 332 static cam_status       xptregister(struct cam_periph *periph,
 333                                     void *arg);
 334 static __inline int device_is_queued(struct cam_ed *device);
 335
 336 static __inline int
 337 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 338 {
 339         int     retval;
 340
 341         mtx_assert(&devq->send_mtx, MA_OWNED);
 342         if ((dev->ccbq.queue.entries > 0) &&
 343             (dev->ccbq.dev_openings > 0) &&
 344             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 345                 /*
 346                  * The priority of a device waiting for controller
 347                  * resources is that of the highest priority CCB
 348                  * enqueued.
 349                  */
 350                 retval =
 351                     xpt_schedule_dev(&devq->send_queue,
 352                                      &dev->devq_entry,
 353                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 354         } else {
 355                 retval = 0;
 356         }
 357         return (retval);
 358 }
 359
 360 static __inline int
 361 device_is_queued(struct cam_ed *device)
 362 {
 363         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 364 }
 365
 366 static void
 367 xpt_periph_init()
 368 {
 369         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 370 }
 371
 372 static int
 373 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 374 {
 375
 376         /*
 377          * Only allow read-write access.
 378          */
 379         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 380                 return(EPERM);
 381
 382         /*
 383          * We don't allow nonblocking access.
 384          */
 385         if ((flags & O_NONBLOCK) != 0) {
 386                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 387                 return(ENODEV);
 388         }
 389
 390         return(0);
 391 }
 392
 393 static int
 394 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 395 {
 396
 397         return(0);
 398 }
 399
 400 /*
 401  * Don't automatically grab the xpt softc lock here even though this is going
 402  * through the xpt device.  The xpt device is really just a back door for
 403  * accessing other devices and SIMs, so the right thing to do is to grab
 404  * the appropriate SIM lock once the bus/SIM is located.
 405  */
 406 static int
 407 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 408 {
 409         int error;
 410
 411         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 412                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 413         }
 414         return (error);
 415 }
 416
 417 static int
 418 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 419 {
 420         int error;
 421
 422         error = 0;
 423
 424         switch(cmd) {
 425         /*
 426          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 427          * to accept CCB types that don't quite make sense to send through a
 428          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 429          * in the CAM spec.
 430          */
 431         case CAMIOCOMMAND: {
 432                 union ccb *ccb;
 433                 union ccb *inccb;
 434                 struct cam_eb *bus;
 435
 436                 inccb = (union ccb *)addr;
 437 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 438                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 439                         inccb->csio.bio = NULL;
 440 #endif
 441
 442                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 443                         return (EINVAL);
 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                         /*
 480                          * Create a path using the bus, target, and lun the
 481                          * user passed in.
 482                          */
 483                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 484                                             inccb->ccb_h.path_id,
 485                                             inccb->ccb_h.target_id,
 486                                             inccb->ccb_h.target_lun) !=
 487                                             CAM_REQ_CMP){
 488                                 error = EINVAL;
 489                                 xpt_free_ccb(ccb);
 490                                 break;
 491                         }
 492                         /* Ensure all of our fields are correct */
 493                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 494                                       inccb->ccb_h.pinfo.priority);
 495                         xpt_merge_ccb(ccb, inccb);
 496                         xpt_path_lock(ccb->ccb_h.path);
 497                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 498                         xpt_path_unlock(ccb->ccb_h.path);
 499                         bcopy(ccb, inccb, sizeof(union ccb));
 500                         xpt_free_path(ccb->ccb_h.path);
 501                         xpt_free_ccb(ccb);
 502                         break;
 503
 504                 case XPT_DEBUG: {
 505                         union ccb ccb;
 506
 507                         /*
 508                          * This is an immediate CCB, so it's okay to
 509                          * allocate it on the stack.
 510                          */
 511
 512                         /*
 513                          * Create a path using the bus, target, and lun the
 514                          * user passed in.
 515                          */
 516                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 517                                             inccb->ccb_h.path_id,
 518                                             inccb->ccb_h.target_id,
 519                                             inccb->ccb_h.target_lun) !=
 520                                             CAM_REQ_CMP){
 521                                 error = EINVAL;
 522                                 break;
 523                         }
 524                         /* Ensure all of our fields are correct */
 525                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 526                                       inccb->ccb_h.pinfo.priority);
 527                         xpt_merge_ccb(&ccb, inccb);
 528                         xpt_action(&ccb);
 529                         bcopy(&ccb, inccb, sizeof(union ccb));
 530                         xpt_free_path(ccb.ccb_h.path);
 531                         break;
 532
 533                 }
 534                 case XPT_DEV_MATCH: {
 535                         struct cam_periph_map_info mapinfo;
 536                         struct cam_path *old_path;
 537
 538                         /*
 539                          * We can't deal with physical addresses for this
 540                          * type of transaction.
 541                          */
 542                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 543                             CAM_DATA_VADDR) {
 544                                 error = EINVAL;
 545                                 break;
 546                         }
 547
 548                         /*
 549                          * Save this in case the caller had it set to
 550                          * something in particular.
 551                          */
 552                         old_path = inccb->ccb_h.path;
 553
 554                         /*
 555                          * We really don't need a path for the matching
 556                          * code.  The path is needed because of the
 557                          * debugging statements in xpt_action().  They
 558                          * assume that the CCB has a valid path.
 559                          */
 560                         inccb->ccb_h.path = xpt_periph->path;
 561
 562                         bzero(&mapinfo, sizeof(mapinfo));
 563
 564                         /*
 565                          * Map the pattern and match buffers into kernel
 566                          * virtual address space.
 567                          */
 568                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 569
 570                         if (error) {
 571                                 inccb->ccb_h.path = old_path;
 572                                 break;
 573                         }
 574
 575                         /*
 576                          * This is an immediate CCB, we can send it on directly.
 577                          */
 578                         xpt_action(inccb);
 579
 580                         /*
 581                          * Map the buffers back into user space.
 582                          */
 583                         cam_periph_unmapmem(inccb, &mapinfo);
 584
 585                         inccb->ccb_h.path = old_path;
 586
 587                         error = 0;
 588                         break;
 589                 }
 590                 default:
 591                         error = ENOTSUP;
 592                         break;
 593                 }
 594                 xpt_release_bus(bus);
 595                 break;
 596         }
 597         /*
 598          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 599          * with the periphal driver name and unit name filled in.  The other
 600          * fields don't really matter as input.  The passthrough driver name
 601          * ("pass"), and unit number are passed back in the ccb.  The current
 602          * device generation number, and the index into the device peripheral
 603          * driver list, and the status are also passed back.  Note that
 604          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 605          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 606          * (or rather should be) impossible for the device peripheral driver
 607          * list to change since we look at the whole thing in one pass, and
 608          * we do it with lock protection.
 609          *
 610          */
 611         case CAMGETPASSTHRU: {
 612                 union ccb *ccb;
 613                 struct cam_periph *periph;
 614                 struct periph_driver **p_drv;
 615                 char   *name;
 616                 u_int unit;
 617                 int base_periph_found;
 618
 619                 ccb = (union ccb *)addr;
 620                 unit = ccb->cgdl.unit_number;
 621                 name = ccb->cgdl.periph_name;
 622                 base_periph_found = 0;
 623 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 624                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 625                         ccb->csio.bio = NULL;
 626 #endif
 627
 628                 /*
 629                  * Sanity check -- make sure we don't get a null peripheral
 630                  * driver name.
 631                  */
 632                 if (*ccb->cgdl.periph_name == '\0') {
 633                         error = EINVAL;
 634                         break;
 635                 }
 636
 637                 /* Keep the list from changing while we traverse it */
 638                 xpt_lock_buses();
 639
 640                 /* first find our driver in the list of drivers */
 641                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 642                         if (strcmp((*p_drv)->driver_name, name) == 0)
 643                                 break;
 644
 645                 if (*p_drv == NULL) {
 646                         xpt_unlock_buses();
 647                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 648                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 649                         *ccb->cgdl.periph_name = '\0';
 650                         ccb->cgdl.unit_number = 0;
 651                         error = ENOENT;
 652                         break;
 653                 }
 654
 655                 /*
 656                  * Run through every peripheral instance of this driver
 657                  * and check to see whether it matches the unit passed
 658                  * in by the user.  If it does, get out of the loops and
 659                  * find the passthrough driver associated with that
 660                  * peripheral driver.
 661                  */
 662                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 663                      periph = TAILQ_NEXT(periph, unit_links)) {
 664
 665                         if (periph->unit_number == unit)
 666                                 break;
 667                 }
 668                 /*
 669                  * If we found the peripheral driver that the user passed
 670                  * in, go through all of the peripheral drivers for that
 671                  * particular device and look for a passthrough driver.
 672                  */
 673                 if (periph != NULL) {
 674                         struct cam_ed *device;
 675                         int i;
 676
 677                         base_periph_found = 1;
 678                         device = periph->path->device;
 679                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 680                              periph != NULL;
 681                              periph = SLIST_NEXT(periph, periph_links), i++) {
 682                                 /*
 683                                  * Check to see whether we have a
 684                                  * passthrough device or not.
 685                                  */
 686                                 if (strcmp(periph->periph_name, "pass") == 0) {
 687                                         /*
 688                                          * Fill in the getdevlist fields.
 689                                          */
 690                                         strlcpy(ccb->cgdl.periph_name,
 691                                                periph->periph_name,
 692                                                sizeof(ccb->cgdl.periph_name));
 693                                         ccb->cgdl.unit_number =
 694                                                 periph->unit_number;
 695                                         if (SLIST_NEXT(periph, periph_links))
 696                                                 ccb->cgdl.status =
 697                                                         CAM_GDEVLIST_MORE_DEVS;
 698                                         else
 699                                                 ccb->cgdl.status =
 700                                                        CAM_GDEVLIST_LAST_DEVICE;
 701                                         ccb->cgdl.generation =
 702                                                 device->generation;
 703                                         ccb->cgdl.index = i;
 704                                         /*
 705                                          * Fill in some CCB header fields
 706                                          * that the user may want.
 707                                          */
 708                                         ccb->ccb_h.path_id =
 709                                                 periph->path->bus->path_id;
 710                                         ccb->ccb_h.target_id =
 711                                                 periph->path->target->target_id;
 712                                         ccb->ccb_h.target_lun =
 713                                                 periph->path->device->lun_id;
 714                                         ccb->ccb_h.status = CAM_REQ_CMP;
 715                                         break;
 716                                 }
 717                         }
 718                 }
 719
 720                 /*
 721                  * If the periph is null here, one of two things has
 722                  * happened.  The first possibility is that we couldn't
 723                  * find the unit number of the particular peripheral driver
 724                  * that the user is asking about.  e.g. the user asks for
 725                  * the passthrough driver for "da11".  We find the list of
 726                  * "da" peripherals all right, but there is no unit 11.
 727                  * The other possibility is that we went through the list
 728                  * of peripheral drivers attached to the device structure,
 729                  * but didn't find one with the name "pass".  Either way,
 730                  * we return ENOENT, since we couldn't find something.
 731                  */
 732                 if (periph == NULL) {
 733                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 734                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 735                         *ccb->cgdl.periph_name = '\0';
 736                         ccb->cgdl.unit_number = 0;
 737                         error = ENOENT;
 738                         /*
 739                          * It is unfortunate that this is even necessary,
 740                          * but there are many, many clueless users out there.
 741                          * If this is true, the user is looking for the
 742                          * passthrough driver, but doesn't have one in his
 743                          * kernel.
 744                          */
 745                         if (base_periph_found == 1) {
 746                                 printf("xptioctl: pass driver is not in the "
 747                                        "kernel\n");
 748                                 printf("xptioctl: put \"device pass\" in "
 749                                        "your kernel config file\n");
 750                         }
 751                 }
 752                 xpt_unlock_buses();
 753                 break;
 754                 }
 755         default:
 756                 error = ENOTTY;
 757                 break;
 758         }
 759
 760         return(error);
 761 }
 762
 763 static int
 764 cam_module_event_handler(module_t mod, int what, void *arg)
 765 {
 766         int error;
 767
 768         switch (what) {
 769         case MOD_LOAD:
 770                 if ((error = xpt_init(NULL)) != 0)
 771                         return (error);
 772                 break;
 773         case MOD_UNLOAD:
 774                 return EBUSY;
 775         default:
 776                 return EOPNOTSUPP;
 777         }
 778
 779         return 0;
 780 }
 781
 782 static struct xpt_proto *
 783 xpt_proto_find(cam_proto proto)
 784 {
 785         struct xpt_proto **pp;
 786
 787         SET_FOREACH(pp, cam_xpt_proto_set) {
 788                 if ((*pp)->proto == proto)
 789                         return *pp;
 790         }
 791
 792         return NULL;
 793 }
 794
 795 static void
 796 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 797 {
 798
 799         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 800                 xpt_free_path(done_ccb->ccb_h.path);
 801                 xpt_free_ccb(done_ccb);
 802         } else {
 803                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 804                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 805         }
 806         xpt_release_boot();
 807 }
 808
 809 /* thread to handle bus rescans */
 810 static void
 811 xpt_scanner_thread(void *dummy)
 812 {
 813         union ccb       *ccb;
 814         struct cam_path  path;
 815
 816         xpt_lock_buses();
 817         for (;;) {
 818                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 819                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 820                                "-", 0);
 821                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 822                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 823                         xpt_unlock_buses();
 824
 825                         /*
 826                          * Since lock can be dropped inside and path freed
 827                          * by completion callback even before return here,
 828                          * take our own path copy for reference.
 829                          */
 830                         xpt_copy_path(&path, ccb->ccb_h.path);
 831                         xpt_path_lock(&path);
 832                         xpt_action(ccb);
 833                         xpt_path_unlock(&path);
 834                         xpt_release_path(&path);
 835
 836                         xpt_lock_buses();
 837                 }
 838         }
 839 }
 840
 841 void
 842 xpt_rescan(union ccb *ccb)
 843 {
 844         struct ccb_hdr *hdr;
 845
 846         /* Prepare request */
 847         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 848             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 849                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 850         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 851             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 852                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 853         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 854             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 855                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 856         else {
 857                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 858                 xpt_free_path(ccb->ccb_h.path);
 859                 xpt_free_ccb(ccb);
 860                 return;
 861         }
 862         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 863             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 864                 xpt_action_name(ccb->ccb_h.func_code)));
 865
 866         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 867         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 868         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 869         /* Don't make duplicate entries for the same paths. */
 870         xpt_lock_buses();
 871         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 872                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 873                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 874                                 wakeup(&xsoftc.ccb_scanq);
 875                                 xpt_unlock_buses();
 876                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 877                                 xpt_free_path(ccb->ccb_h.path);
 878                                 xpt_free_ccb(ccb);
 879                                 return;
 880                         }
 881                 }
 882         }
 883         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 884         xsoftc.buses_to_config++;
 885         wakeup(&xsoftc.ccb_scanq);
 886         xpt_unlock_buses();
 887 }
 888
 889 /* Functions accessed by the peripheral drivers */
 890 static int
 891 xpt_init(void *dummy)
 892 {
 893         struct cam_sim *xpt_sim;
 894         struct cam_path *path;
 895         struct cam_devq *devq;
 896         cam_status status;
 897         int error, i;
 898
 899         TAILQ_INIT(&xsoftc.xpt_busses);
 900         TAILQ_INIT(&xsoftc.ccb_scanq);
 901         STAILQ_INIT(&xsoftc.highpowerq);
 902         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 903
 904         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 905         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 906         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 907             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 908
 909 #ifdef CAM_BOOT_DELAY
 910         /*
 911          * Override this value at compile time to assist our users
 912          * who don't use loader to boot a kernel.
 913          */
 914         xsoftc.boot_delay = CAM_BOOT_DELAY;
 915 #endif
 916         /*
 917          * The xpt layer is, itself, the equivalent of a SIM.
 918          * Allow 16 ccbs in the ccb pool for it.  This should
 919          * give decent parallelism when we probe buses and
 920          * perform other XPT functions.
 921          */
 922         devq = cam_simq_alloc(16);
 923         xpt_sim = cam_sim_alloc(xptaction,
 924                                 xptpoll,
 925                                 "xpt",
 926                                 /*softc*/NULL,
 927                                 /*unit*/0,
 928                                 /*mtx*/&xsoftc.xpt_lock,
 929                                 /*max_dev_transactions*/0,
 930                                 /*max_tagged_dev_transactions*/0,
 931                                 devq);
 932         if (xpt_sim == NULL)
 933                 return (ENOMEM);
 934
 935         mtx_lock(&xsoftc.xpt_lock);
 936         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 937                 mtx_unlock(&xsoftc.xpt_lock);
 938                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 939                        " failing attach\n", status);
 940                 return (EINVAL);
 941         }
 942         mtx_unlock(&xsoftc.xpt_lock);
 943
 944         /*
 945          * Looking at the XPT from the SIM layer, the XPT is
 946          * the equivalent of a peripheral driver.  Allocate
 947          * a peripheral driver entry for us.
 948          */
 949         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 950                                       CAM_TARGET_WILDCARD,
 951                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 952                 printf("xpt_init: xpt_create_path failed with status %#x,"
 953                        " failing attach\n", status);
 954                 return (EINVAL);
 955         }
 956         xpt_path_lock(path);
 957         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 958                          path, NULL, 0, xpt_sim);
 959         xpt_path_unlock(path);
 960         xpt_free_path(path);
 961
 962         if (cam_num_doneqs < 1)
 963                 cam_num_doneqs = 1 + mp_ncpus / 6;
 964         else if (cam_num_doneqs > MAXCPU)
 965                 cam_num_doneqs = MAXCPU;
 966         for (i = 0; i < cam_num_doneqs; i++) {
 967                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 968                     MTX_DEF);
 969                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 970                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 971                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 972                 if (error != 0) {
 973                         cam_num_doneqs = i;
 974                         break;
 975                 }
 976         }
 977         if (cam_num_doneqs < 1) {
 978                 printf("xpt_init: Cannot init completion queues "
 979                        "- failing attach\n");
 980                 return (ENOMEM);
 981         }
 982         /*
 983          * Register a callback for when interrupts are enabled.
 984          */
 985         xsoftc.xpt_config_hook.ich_func = xpt_config;
 986         if (config_intrhook_establish(&xsoftc.xpt_config_hook) != 0) {
 987                 printf("xpt_init: config_intrhook_establish failed "
 988                        "- failing attach\n");
 989         }
 990
 991         return (0);
 992 }
 993
 994 static cam_status
 995 xptregister(struct cam_periph *periph, void *arg)
 996 {
 997         struct cam_sim *xpt_sim;
 998
 999         if (periph == NULL) {
1000                 printf("xptregister: periph was NULL!!\n");
1001                 return(CAM_REQ_CMP_ERR);
1002         }
1003
1004         xpt_sim = (struct cam_sim *)arg;
1005         xpt_sim->softc = periph;
1006         xpt_periph = periph;
1007         periph->softc = NULL;
1008
1009         return(CAM_REQ_CMP);
1010 }
1011
1012 int32_t
1013 xpt_add_periph(struct cam_periph *periph)
1014 {
1015         struct cam_ed *device;
1016         int32_t  status;
1017
1018         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1019         device = periph->path->device;
1020         status = CAM_REQ_CMP;
1021         if (device != NULL) {
1022                 mtx_lock(&device->target->bus->eb_mtx);
1023                 device->generation++;
1024                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1025                 mtx_unlock(&device->target->bus->eb_mtx);
1026                 atomic_add_32(&xsoftc.xpt_generation, 1);
1027         }
1028
1029         return (status);
1030 }
1031
1032 void
1033 xpt_remove_periph(struct cam_periph *periph)
1034 {
1035         struct cam_ed *device;
1036
1037         device = periph->path->device;
1038         if (device != NULL) {
1039                 mtx_lock(&device->target->bus->eb_mtx);
1040                 device->generation++;
1041                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1042                 mtx_unlock(&device->target->bus->eb_mtx);
1043                 atomic_add_32(&xsoftc.xpt_generation, 1);
1044         }
1045 }
1046
1047
1048 void
1049 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1050 {
1051         struct  cam_path *path = periph->path;
1052         struct  xpt_proto *proto;
1053
1054         cam_periph_assert(periph, MA_OWNED);
1055         periph->flags |= CAM_PERIPH_ANNOUNCED;
1056
1057         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1058                periph->periph_name, periph->unit_number,
1059                path->bus->sim->sim_name,
1060                path->bus->sim->unit_number,
1061                path->bus->sim->bus_id,
1062                path->bus->path_id,
1063                path->target->target_id,
1064                (uintmax_t)path->device->lun_id);
1065         printf("%s%d: ", periph->periph_name, periph->unit_number);
1066         proto = xpt_proto_find(path->device->protocol);
1067         if (proto)
1068                 proto->ops->announce(path->device);
1069         else
1070                 printf("%s%d: Unknown protocol device %d\n",
1071                     periph->periph_name, periph->unit_number,
1072                     path->device->protocol);
1073         if (path->device->serial_num_len > 0) {
1074                 /* Don't wrap the screen  - print only the first 60 chars */
1075                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1076                        periph->unit_number, path->device->serial_num);
1077         }
1078         /* Announce transport details. */
1079         path->bus->xport->ops->announce(periph);
1080         /* Announce command queueing. */
1081         if (path->device->inq_flags & SID_CmdQue
1082          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1083                 printf("%s%d: Command Queueing enabled\n",
1084                        periph->periph_name, periph->unit_number);
1085         }
1086         /* Announce caller's details if they've passed in. */
1087         if (announce_string != NULL)
1088                 printf("%s%d: %s\n", periph->periph_name,
1089                        periph->unit_number, announce_string);
1090 }
1091
1092 void
1093 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1094     char *announce_string)
1095 {
1096         struct  cam_path *path = periph->path;
1097         struct  xpt_proto *proto;
1098
1099         cam_periph_assert(periph, MA_OWNED);
1100         periph->flags |= CAM_PERIPH_ANNOUNCED;
1101
1102         /* Fall back to the non-sbuf method if necessary */
1103         if (xsoftc.announce_nosbuf != 0) {
1104                 xpt_announce_periph(periph, announce_string);
1105                 return;
1106         }
1107         proto = xpt_proto_find(path->device->protocol);
1108         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1109             (path->bus->xport->ops->announce_sbuf == NULL)) {
1110                 xpt_announce_periph(periph, announce_string);
1111                 return;
1112         }
1113
1114         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1115             periph->periph_name, periph->unit_number,
1116             path->bus->sim->sim_name,
1117             path->bus->sim->unit_number,
1118             path->bus->sim->bus_id,
1119             path->bus->path_id,
1120             path->target->target_id,
1121             (uintmax_t)path->device->lun_id);
1122         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1123
1124         if (proto)
1125                 proto->ops->announce_sbuf(path->device, sb);
1126         else
1127                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1128                     periph->periph_name, periph->unit_number,
1129                     path->device->protocol);
1130         if (path->device->serial_num_len > 0) {
1131                 /* Don't wrap the screen  - print only the first 60 chars */
1132                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1133                     periph->periph_name, periph->unit_number,
1134                     path->device->serial_num);
1135         }
1136         /* Announce transport details. */
1137         path->bus->xport->ops->announce_sbuf(periph, sb);
1138         /* Announce command queueing. */
1139         if (path->device->inq_flags & SID_CmdQue
1140          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1141                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1142                     periph->periph_name, periph->unit_number);
1143         }
1144         /* Announce caller's details if they've passed in. */
1145         if (announce_string != NULL)
1146                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1147                     periph->unit_number, announce_string);
1148 }
1149
1150 void
1151 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1152 {
1153         if (quirks != 0) {
1154                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1155                     periph->unit_number, quirks, bit_string);
1156         }
1157 }
1158
1159 void
1160 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1161                          int quirks, char *bit_string)
1162 {
1163         if (xsoftc.announce_nosbuf != 0) {
1164                 xpt_announce_quirks(periph, quirks, bit_string);
1165                 return;
1166         }
1167
1168         if (quirks != 0) {
1169                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1170                     periph->unit_number, quirks, bit_string);
1171         }
1172 }
1173
1174 void
1175 xpt_denounce_periph(struct cam_periph *periph)
1176 {
1177         struct  cam_path *path = periph->path;
1178         struct  xpt_proto *proto;
1179
1180         cam_periph_assert(periph, MA_OWNED);
1181         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1182                periph->periph_name, periph->unit_number,
1183                path->bus->sim->sim_name,
1184                path->bus->sim->unit_number,
1185                path->bus->sim->bus_id,
1186                path->bus->path_id,
1187                path->target->target_id,
1188                (uintmax_t)path->device->lun_id);
1189         printf("%s%d: ", periph->periph_name, periph->unit_number);
1190         proto = xpt_proto_find(path->device->protocol);
1191         if (proto)
1192                 proto->ops->denounce(path->device);
1193         else
1194                 printf("%s%d: Unknown protocol device %d\n",
1195                     periph->periph_name, periph->unit_number,
1196                     path->device->protocol);
1197         if (path->device->serial_num_len > 0)
1198                 printf(" s/n %.60s", path->device->serial_num);
1199         printf(" detached\n");
1200 }
1201
1202 void
1203 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1204 {
1205         struct cam_path *path = periph->path;
1206         struct xpt_proto *proto;
1207
1208         cam_periph_assert(periph, MA_OWNED);
1209
1210         /* Fall back to the non-sbuf method if necessary */
1211         if (xsoftc.announce_nosbuf != 0) {
1212                 xpt_denounce_periph(periph);
1213                 return;
1214         }
1215         proto = xpt_proto_find(path->device->protocol);
1216         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1217                 xpt_denounce_periph(periph);
1218                 return;
1219         }
1220
1221         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1222             periph->periph_name, periph->unit_number,
1223             path->bus->sim->sim_name,
1224             path->bus->sim->unit_number,
1225             path->bus->sim->bus_id,
1226             path->bus->path_id,
1227             path->target->target_id,
1228             (uintmax_t)path->device->lun_id);
1229         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1230
1231         if (proto)
1232                 proto->ops->denounce_sbuf(path->device, sb);
1233         else
1234                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1235                     periph->periph_name, periph->unit_number,
1236                     path->device->protocol);
1237         if (path->device->serial_num_len > 0)
1238                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1239         sbuf_printf(sb, " detached\n");
1240 }
1241
1242 int
1243 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1244 {
1245         int ret = -1, l, o;
1246         struct ccb_dev_advinfo cdai;
1247         struct scsi_vpd_id_descriptor *idd;
1248
1249         xpt_path_assert(path, MA_OWNED);
1250
1251         memset(&cdai, 0, sizeof(cdai));
1252         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1253         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1254         cdai.flags = CDAI_FLAG_NONE;
1255         cdai.bufsiz = len;
1256
1257         if (!strcmp(attr, "GEOM::ident"))
1258                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1259         else if (!strcmp(attr, "GEOM::physpath"))
1260                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1261         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1262                  strcmp(attr, "GEOM::lunname") == 0) {
1263                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1264                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1265         } else
1266                 goto out;
1267
1268         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1269         if (cdai.buf == NULL) {
1270                 ret = ENOMEM;
1271                 goto out;
1272         }
1273         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1274         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1275                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1276         if (cdai.provsiz == 0)
1277                 goto out;
1278         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1279                 if (strcmp(attr, "GEOM::lunid") == 0) {
1280                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1281                             cdai.provsiz, scsi_devid_is_lun_naa);
1282                         if (idd == NULL)
1283                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1284                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1285                         if (idd == NULL)
1286                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1287                                     cdai.provsiz, scsi_devid_is_lun_uuid);
1288                         if (idd == NULL)
1289                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1290                                     cdai.provsiz, scsi_devid_is_lun_md5);
1291                 } else
1292                         idd = NULL;
1293                 if (idd == NULL)
1294                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1295                             cdai.provsiz, scsi_devid_is_lun_t10);
1296                 if (idd == NULL)
1297                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1298                             cdai.provsiz, scsi_devid_is_lun_name);
1299                 if (idd == NULL)
1300                         goto out;
1301                 ret = 0;
1302                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1303                         if (idd->length < len) {
1304                                 for (l = 0; l < idd->length; l++)
1305                                         buf[l] = idd->identifier[l] ?
1306                                             idd->identifier[l] : ' ';
1307                                 buf[l] = 0;
1308                         } else
1309                                 ret = EFAULT;
1310                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1311                         l = strnlen(idd->identifier, idd->length);
1312                         if (l < len) {
1313                                 bcopy(idd->identifier, buf, l);
1314                                 buf[l] = 0;
1315                         } else
1316                                 ret = EFAULT;
1317                 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1318                     && idd->identifier[0] == 0x10) {
1319                         if ((idd->length - 2) * 2 + 4 < len) {
1320                                 for (l = 2, o = 0; l < idd->length; l++) {
1321                                         if (l == 6 || l == 8 || l == 10 || l == 12)
1322                                             o += sprintf(buf + o, "-");
1323                                         o += sprintf(buf + o, "%02x",
1324                                             idd->identifier[l]);
1325                                 }
1326                         } else
1327                                 ret = EFAULT;
1328                 } else {
1329                         if (idd->length * 2 < len) {
1330                                 for (l = 0; l < idd->length; l++)
1331                                         sprintf(buf + l * 2, "%02x",
1332                                             idd->identifier[l]);
1333                         } else
1334                                 ret = EFAULT;
1335                 }
1336         } else {
1337                 ret = 0;
1338                 if (strlcpy(buf, cdai.buf, len) >= len)
1339                         ret = EFAULT;
1340         }
1341
1342 out:
1343         if (cdai.buf != NULL)
1344                 free(cdai.buf, M_CAMXPT);
1345         return ret;
1346 }
1347
1348 static dev_match_ret
1349 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1350             struct cam_eb *bus)
1351 {
1352         dev_match_ret retval;
1353         u_int i;
1354
1355         retval = DM_RET_NONE;
1356
1357         /*
1358          * If we aren't given something to match against, that's an error.
1359          */
1360         if (bus == NULL)
1361                 return(DM_RET_ERROR);
1362
1363         /*
1364          * If there are no match entries, then this bus matches no
1365          * matter what.
1366          */
1367         if ((patterns == NULL) || (num_patterns == 0))
1368                 return(DM_RET_DESCEND | DM_RET_COPY);
1369
1370         for (i = 0; i < num_patterns; i++) {
1371                 struct bus_match_pattern *cur_pattern;
1372
1373                 /*
1374                  * If the pattern in question isn't for a bus node, we
1375                  * aren't interested.  However, we do indicate to the
1376                  * calling routine that we should continue descending the
1377                  * tree, since the user wants to match against lower-level
1378                  * EDT elements.
1379                  */
1380                 if (patterns[i].type != DEV_MATCH_BUS) {
1381                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1382                                 retval |= DM_RET_DESCEND;
1383                         continue;
1384                 }
1385
1386                 cur_pattern = &patterns[i].pattern.bus_pattern;
1387
1388                 /*
1389                  * If they want to match any bus node, we give them any
1390                  * device node.
1391                  */
1392                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1393                         /* set the copy flag */
1394                         retval |= DM_RET_COPY;
1395
1396                         /*
1397                          * If we've already decided on an action, go ahead
1398                          * and return.
1399                          */
1400                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1401                                 return(retval);
1402                 }
1403
1404                 /*
1405                  * Not sure why someone would do this...
1406                  */
1407                 if (cur_pattern->flags == BUS_MATCH_NONE)
1408                         continue;
1409
1410                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1411                  && (cur_pattern->path_id != bus->path_id))
1412                         continue;
1413
1414                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1415                  && (cur_pattern->bus_id != bus->sim->bus_id))
1416                         continue;
1417
1418                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1419                  && (cur_pattern->unit_number != bus->sim->unit_number))
1420                         continue;
1421
1422                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1423                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1424                              DEV_IDLEN) != 0))
1425                         continue;
1426
1427                 /*
1428                  * If we get to this point, the user definitely wants
1429                  * information on this bus.  So tell the caller to copy the
1430                  * data out.
1431                  */
1432                 retval |= DM_RET_COPY;
1433
1434                 /*
1435                  * If the return action has been set to descend, then we
1436                  * know that we've already seen a non-bus matching
1437                  * expression, therefore we need to further descend the tree.
1438                  * This won't change by continuing around the loop, so we
1439                  * go ahead and return.  If we haven't seen a non-bus
1440                  * matching expression, we keep going around the loop until
1441                  * we exhaust the matching expressions.  We'll set the stop
1442                  * flag once we fall out of the loop.
1443                  */
1444                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1445                         return(retval);
1446         }
1447
1448         /*
1449          * If the return action hasn't been set to descend yet, that means
1450          * we haven't seen anything other than bus matching patterns.  So
1451          * tell the caller to stop descending the tree -- the user doesn't
1452          * want to match against lower level tree elements.
1453          */
1454         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1455                 retval |= DM_RET_STOP;
1456
1457         return(retval);
1458 }
1459
1460 static dev_match_ret
1461 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1462                struct cam_ed *device)
1463 {
1464         dev_match_ret retval;
1465         u_int i;
1466
1467         retval = DM_RET_NONE;
1468
1469         /*
1470          * If we aren't given something to match against, that's an error.
1471          */
1472         if (device == NULL)
1473                 return(DM_RET_ERROR);
1474
1475         /*
1476          * If there are no match entries, then this device matches no
1477          * matter what.
1478          */
1479         if ((patterns == NULL) || (num_patterns == 0))
1480                 return(DM_RET_DESCEND | DM_RET_COPY);
1481
1482         for (i = 0; i < num_patterns; i++) {
1483                 struct device_match_pattern *cur_pattern;
1484                 struct scsi_vpd_device_id *device_id_page;
1485
1486                 /*
1487                  * If the pattern in question isn't for a device node, we
1488                  * aren't interested.
1489                  */
1490                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1491                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1492                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1493                                 retval |= DM_RET_DESCEND;
1494                         continue;
1495                 }
1496
1497                 cur_pattern = &patterns[i].pattern.device_pattern;
1498
1499                 /* Error out if mutually exclusive options are specified. */
1500                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1501                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1502                         return(DM_RET_ERROR);
1503
1504                 /*
1505                  * If they want to match any device node, we give them any
1506                  * device node.
1507                  */
1508                 if (cur_pattern->flags == DEV_MATCH_ANY)
1509                         goto copy_dev_node;
1510
1511                 /*
1512                  * Not sure why someone would do this...
1513                  */
1514                 if (cur_pattern->flags == DEV_MATCH_NONE)
1515                         continue;
1516
1517                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1518                  && (cur_pattern->path_id != device->target->bus->path_id))
1519                         continue;
1520
1521                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1522                  && (cur_pattern->target_id != device->target->target_id))
1523                         continue;
1524
1525                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1526                  && (cur_pattern->target_lun != device->lun_id))
1527                         continue;
1528
1529                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1530                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1531                                     (caddr_t)&cur_pattern->data.inq_pat,
1532                                     1, sizeof(cur_pattern->data.inq_pat),
1533                                     scsi_static_inquiry_match) == NULL))
1534                         continue;
1535
1536                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1537                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1538                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1539                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1540                                       device->device_id_len
1541                                     - SVPD_DEVICE_ID_HDR_LEN,
1542                                       cur_pattern->data.devid_pat.id,
1543                                       cur_pattern->data.devid_pat.id_len) != 0))
1544                         continue;
1545
1546 copy_dev_node:
1547                 /*
1548                  * If we get to this point, the user definitely wants
1549                  * information on this device.  So tell the caller to copy
1550                  * the data out.
1551                  */
1552                 retval |= DM_RET_COPY;
1553
1554                 /*
1555                  * If the return action has been set to descend, then we
1556                  * know that we've already seen a peripheral matching
1557                  * expression, therefore we need to further descend the tree.
1558                  * This won't change by continuing around the loop, so we
1559                  * go ahead and return.  If we haven't seen a peripheral
1560                  * matching expression, we keep going around the loop until
1561                  * we exhaust the matching expressions.  We'll set the stop
1562                  * flag once we fall out of the loop.
1563                  */
1564                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1565                         return(retval);
1566         }
1567
1568         /*
1569          * If the return action hasn't been set to descend yet, that means
1570          * we haven't seen any peripheral matching patterns.  So tell the
1571          * caller to stop descending the tree -- the user doesn't want to
1572          * match against lower level tree elements.
1573          */
1574         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1575                 retval |= DM_RET_STOP;
1576
1577         return(retval);
1578 }
1579
1580 /*
1581  * Match a single peripheral against any number of match patterns.
1582  */
1583 static dev_match_ret
1584 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1585                struct cam_periph *periph)
1586 {
1587         dev_match_ret retval;
1588         u_int i;
1589
1590         /*
1591          * If we aren't given something to match against, that's an error.
1592          */
1593         if (periph == NULL)
1594                 return(DM_RET_ERROR);
1595
1596         /*
1597          * If there are no match entries, then this peripheral matches no
1598          * matter what.
1599          */
1600         if ((patterns == NULL) || (num_patterns == 0))
1601                 return(DM_RET_STOP | DM_RET_COPY);
1602
1603         /*
1604          * There aren't any nodes below a peripheral node, so there's no
1605          * reason to descend the tree any further.
1606          */
1607         retval = DM_RET_STOP;
1608
1609         for (i = 0; i < num_patterns; i++) {
1610                 struct periph_match_pattern *cur_pattern;
1611
1612                 /*
1613                  * If the pattern in question isn't for a peripheral, we
1614                  * aren't interested.
1615                  */
1616                 if (patterns[i].type != DEV_MATCH_PERIPH)
1617                         continue;
1618
1619                 cur_pattern = &patterns[i].pattern.periph_pattern;
1620
1621                 /*
1622                  * If they want to match on anything, then we will do so.
1623                  */
1624                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1625                         /* set the copy flag */
1626                         retval |= DM_RET_COPY;
1627
1628                         /*
1629                          * We've already set the return action to stop,
1630                          * since there are no nodes below peripherals in
1631                          * the tree.
1632                          */
1633                         return(retval);
1634                 }
1635
1636                 /*
1637                  * Not sure why someone would do this...
1638                  */
1639                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1640                         continue;
1641
1642                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1643                  && (cur_pattern->path_id != periph->path->bus->path_id))
1644                         continue;
1645
1646                 /*
1647                  * For the target and lun id's, we have to make sure the
1648                  * target and lun pointers aren't NULL.  The xpt peripheral
1649                  * has a wildcard target and device.
1650                  */
1651                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1652                  && ((periph->path->target == NULL)
1653                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1654                         continue;
1655
1656                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1657                  && ((periph->path->device == NULL)
1658                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1659                         continue;
1660
1661                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1662                  && (cur_pattern->unit_number != periph->unit_number))
1663                         continue;
1664
1665                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1666                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1667                              DEV_IDLEN) != 0))
1668                         continue;
1669
1670                 /*
1671                  * If we get to this point, the user definitely wants
1672                  * information on this peripheral.  So tell the caller to
1673                  * copy the data out.
1674                  */
1675                 retval |= DM_RET_COPY;
1676
1677                 /*
1678                  * The return action has already been set to stop, since
1679                  * peripherals don't have any nodes below them in the EDT.
1680                  */
1681                 return(retval);
1682         }
1683
1684         /*
1685          * If we get to this point, the peripheral that was passed in
1686          * doesn't match any of the patterns.
1687          */
1688         return(retval);
1689 }
1690
1691 static int
1692 xptedtbusfunc(struct cam_eb *bus, void *arg)
1693 {
1694         struct ccb_dev_match *cdm;
1695         struct cam_et *target;
1696         dev_match_ret retval;
1697
1698         cdm = (struct ccb_dev_match *)arg;
1699
1700         /*
1701          * If our position is for something deeper in the tree, that means
1702          * that we've already seen this node.  So, we keep going down.
1703          */
1704         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1705          && (cdm->pos.cookie.bus == bus)
1706          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1707          && (cdm->pos.cookie.target != NULL))
1708                 retval = DM_RET_DESCEND;
1709         else
1710                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1711
1712         /*
1713          * If we got an error, bail out of the search.
1714          */
1715         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1716                 cdm->status = CAM_DEV_MATCH_ERROR;
1717                 return(0);
1718         }
1719
1720         /*
1721          * If the copy flag is set, copy this bus out.
1722          */
1723         if (retval & DM_RET_COPY) {
1724                 int spaceleft, j;
1725
1726                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1727                         sizeof(struct dev_match_result));
1728
1729                 /*
1730                  * If we don't have enough space to put in another
1731                  * match result, save our position and tell the
1732                  * user there are more devices to check.
1733                  */
1734                 if (spaceleft < sizeof(struct dev_match_result)) {
1735                         bzero(&cdm->pos, sizeof(cdm->pos));
1736                         cdm->pos.position_type =
1737                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1738
1739                         cdm->pos.cookie.bus = bus;
1740                         cdm->pos.generations[CAM_BUS_GENERATION]=
1741                                 xsoftc.bus_generation;
1742                         cdm->status = CAM_DEV_MATCH_MORE;
1743                         return(0);
1744                 }
1745                 j = cdm->num_matches;
1746                 cdm->num_matches++;
1747                 cdm->matches[j].type = DEV_MATCH_BUS;
1748                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1749                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1750                 cdm->matches[j].result.bus_result.unit_number =
1751                         bus->sim->unit_number;
1752                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1753                         bus->sim->sim_name,
1754                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1755         }
1756
1757         /*
1758          * If the user is only interested in buses, there's no
1759          * reason to descend to the next level in the tree.
1760          */
1761         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1762                 return(1);
1763
1764         /*
1765          * If there is a target generation recorded, check it to
1766          * make sure the target list hasn't changed.
1767          */
1768         mtx_lock(&bus->eb_mtx);
1769         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1770          && (cdm->pos.cookie.bus == bus)
1771          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1772          && (cdm->pos.cookie.target != NULL)) {
1773                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1774                     bus->generation)) {
1775                         mtx_unlock(&bus->eb_mtx);
1776                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1777                         return (0);
1778                 }
1779                 target = (struct cam_et *)cdm->pos.cookie.target;
1780                 target->refcount++;
1781         } else
1782                 target = NULL;
1783         mtx_unlock(&bus->eb_mtx);
1784
1785         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1786 }
1787
1788 static int
1789 xptedttargetfunc(struct cam_et *target, void *arg)
1790 {
1791         struct ccb_dev_match *cdm;
1792         struct cam_eb *bus;
1793         struct cam_ed *device;
1794
1795         cdm = (struct ccb_dev_match *)arg;
1796         bus = target->bus;
1797
1798         /*
1799          * If there is a device list generation recorded, check it to
1800          * make sure the device list hasn't changed.
1801          */
1802         mtx_lock(&bus->eb_mtx);
1803         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1804          && (cdm->pos.cookie.bus == bus)
1805          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1806          && (cdm->pos.cookie.target == target)
1807          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1808          && (cdm->pos.cookie.device != NULL)) {
1809                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1810                     target->generation) {
1811                         mtx_unlock(&bus->eb_mtx);
1812                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1813                         return(0);
1814                 }
1815                 device = (struct cam_ed *)cdm->pos.cookie.device;
1816                 device->refcount++;
1817         } else
1818                 device = NULL;
1819         mtx_unlock(&bus->eb_mtx);
1820
1821         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1822 }
1823
1824 static int
1825 xptedtdevicefunc(struct cam_ed *device, void *arg)
1826 {
1827         struct cam_eb *bus;
1828         struct cam_periph *periph;
1829         struct ccb_dev_match *cdm;
1830         dev_match_ret retval;
1831
1832         cdm = (struct ccb_dev_match *)arg;
1833         bus = device->target->bus;
1834
1835         /*
1836          * If our position is for something deeper in the tree, that means
1837          * that we've already seen this node.  So, we keep going down.
1838          */
1839         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1840          && (cdm->pos.cookie.device == device)
1841          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1842          && (cdm->pos.cookie.periph != NULL))
1843                 retval = DM_RET_DESCEND;
1844         else
1845                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1846                                         device);
1847
1848         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1849                 cdm->status = CAM_DEV_MATCH_ERROR;
1850                 return(0);
1851         }
1852
1853         /*
1854          * If the copy flag is set, copy this device out.
1855          */
1856         if (retval & DM_RET_COPY) {
1857                 int spaceleft, j;
1858
1859                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1860                         sizeof(struct dev_match_result));
1861
1862                 /*
1863                  * If we don't have enough space to put in another
1864                  * match result, save our position and tell the
1865                  * user there are more devices to check.
1866                  */
1867                 if (spaceleft < sizeof(struct dev_match_result)) {
1868                         bzero(&cdm->pos, sizeof(cdm->pos));
1869                         cdm->pos.position_type =
1870                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1871                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1872
1873                         cdm->pos.cookie.bus = device->target->bus;
1874                         cdm->pos.generations[CAM_BUS_GENERATION]=
1875                                 xsoftc.bus_generation;
1876                         cdm->pos.cookie.target = device->target;
1877                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1878                                 device->target->bus->generation;
1879                         cdm->pos.cookie.device = device;
1880                         cdm->pos.generations[CAM_DEV_GENERATION] =
1881                                 device->target->generation;
1882                         cdm->status = CAM_DEV_MATCH_MORE;
1883                         return(0);
1884                 }
1885                 j = cdm->num_matches;
1886                 cdm->num_matches++;
1887                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1888                 cdm->matches[j].result.device_result.path_id =
1889                         device->target->bus->path_id;
1890                 cdm->matches[j].result.device_result.target_id =
1891                         device->target->target_id;
1892                 cdm->matches[j].result.device_result.target_lun =
1893                         device->lun_id;
1894                 cdm->matches[j].result.device_result.protocol =
1895                         device->protocol;
1896                 bcopy(&device->inq_data,
1897                       &cdm->matches[j].result.device_result.inq_data,
1898                       sizeof(struct scsi_inquiry_data));
1899                 bcopy(&device->ident_data,
1900                       &cdm->matches[j].result.device_result.ident_data,
1901                       sizeof(struct ata_params));
1902
1903                 /* Let the user know whether this device is unconfigured */
1904                 if (device->flags & CAM_DEV_UNCONFIGURED)
1905                         cdm->matches[j].result.device_result.flags =
1906                                 DEV_RESULT_UNCONFIGURED;
1907                 else
1908                         cdm->matches[j].result.device_result.flags =
1909                                 DEV_RESULT_NOFLAG;
1910         }
1911
1912         /*
1913          * If the user isn't interested in peripherals, don't descend
1914          * the tree any further.
1915          */
1916         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1917                 return(1);
1918
1919         /*
1920          * If there is a peripheral list generation recorded, make sure
1921          * it hasn't changed.
1922          */
1923         xpt_lock_buses();
1924         mtx_lock(&bus->eb_mtx);
1925         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1926          && (cdm->pos.cookie.bus == bus)
1927          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1928          && (cdm->pos.cookie.target == device->target)
1929          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1930          && (cdm->pos.cookie.device == device)
1931          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1932          && (cdm->pos.cookie.periph != NULL)) {
1933                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1934                     device->generation) {
1935                         mtx_unlock(&bus->eb_mtx);
1936                         xpt_unlock_buses();
1937                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1938                         return(0);
1939                 }
1940                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1941                 periph->refcount++;
1942         } else
1943                 periph = NULL;
1944         mtx_unlock(&bus->eb_mtx);
1945         xpt_unlock_buses();
1946
1947         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1948 }
1949
1950 static int
1951 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1952 {
1953         struct ccb_dev_match *cdm;
1954         dev_match_ret retval;
1955
1956         cdm = (struct ccb_dev_match *)arg;
1957
1958         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1959
1960         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1961                 cdm->status = CAM_DEV_MATCH_ERROR;
1962                 return(0);
1963         }
1964
1965         /*
1966          * If the copy flag is set, copy this peripheral out.
1967          */
1968         if (retval & DM_RET_COPY) {
1969                 int spaceleft, j;
1970                 size_t l;
1971
1972                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1973                         sizeof(struct dev_match_result));
1974
1975                 /*
1976                  * If we don't have enough space to put in another
1977                  * match result, save our position and tell the
1978                  * user there are more devices to check.
1979                  */
1980                 if (spaceleft < sizeof(struct dev_match_result)) {
1981                         bzero(&cdm->pos, sizeof(cdm->pos));
1982                         cdm->pos.position_type =
1983                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1984                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1985                                 CAM_DEV_POS_PERIPH;
1986
1987                         cdm->pos.cookie.bus = periph->path->bus;
1988                         cdm->pos.generations[CAM_BUS_GENERATION]=
1989                                 xsoftc.bus_generation;
1990                         cdm->pos.cookie.target = periph->path->target;
1991                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1992                                 periph->path->bus->generation;
1993                         cdm->pos.cookie.device = periph->path->device;
1994                         cdm->pos.generations[CAM_DEV_GENERATION] =
1995                                 periph->path->target->generation;
1996                         cdm->pos.cookie.periph = periph;
1997                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1998                                 periph->path->device->generation;
1999                         cdm->status = CAM_DEV_MATCH_MORE;
2000                         return(0);
2001                 }
2002
2003                 j = cdm->num_matches;
2004                 cdm->num_matches++;
2005                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2006                 cdm->matches[j].result.periph_result.path_id =
2007                         periph->path->bus->path_id;
2008                 cdm->matches[j].result.periph_result.target_id =
2009                         periph->path->target->target_id;
2010                 cdm->matches[j].result.periph_result.target_lun =
2011                         periph->path->device->lun_id;
2012                 cdm->matches[j].result.periph_result.unit_number =
2013                         periph->unit_number;
2014                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2015                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2016                         periph->periph_name, l);
2017         }
2018
2019         return(1);
2020 }
2021
2022 static int
2023 xptedtmatch(struct ccb_dev_match *cdm)
2024 {
2025         struct cam_eb *bus;
2026         int ret;
2027
2028         cdm->num_matches = 0;
2029
2030         /*
2031          * Check the bus list generation.  If it has changed, the user
2032          * needs to reset everything and start over.
2033          */
2034         xpt_lock_buses();
2035         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2036          && (cdm->pos.cookie.bus != NULL)) {
2037                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2038                     xsoftc.bus_generation) {
2039                         xpt_unlock_buses();
2040                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2041                         return(0);
2042                 }
2043                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2044                 bus->refcount++;
2045         } else
2046                 bus = NULL;
2047         xpt_unlock_buses();
2048
2049         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2050
2051         /*
2052          * If we get back 0, that means that we had to stop before fully
2053          * traversing the EDT.  It also means that one of the subroutines
2054          * has set the status field to the proper value.  If we get back 1,
2055          * we've fully traversed the EDT and copied out any matching entries.
2056          */
2057         if (ret == 1)
2058                 cdm->status = CAM_DEV_MATCH_LAST;
2059
2060         return(ret);
2061 }
2062
2063 static int
2064 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2065 {
2066         struct cam_periph *periph;
2067         struct ccb_dev_match *cdm;
2068
2069         cdm = (struct ccb_dev_match *)arg;
2070
2071         xpt_lock_buses();
2072         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2073          && (cdm->pos.cookie.pdrv == pdrv)
2074          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2075          && (cdm->pos.cookie.periph != NULL)) {
2076                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2077                     (*pdrv)->generation) {
2078                         xpt_unlock_buses();
2079                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2080                         return(0);
2081                 }
2082                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2083                 periph->refcount++;
2084         } else
2085                 periph = NULL;
2086         xpt_unlock_buses();
2087
2088         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2089 }
2090
2091 static int
2092 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2093 {
2094         struct ccb_dev_match *cdm;
2095         dev_match_ret retval;
2096
2097         cdm = (struct ccb_dev_match *)arg;
2098
2099         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2100
2101         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2102                 cdm->status = CAM_DEV_MATCH_ERROR;
2103                 return(0);
2104         }
2105
2106         /*
2107          * If the copy flag is set, copy this peripheral out.
2108          */
2109         if (retval & DM_RET_COPY) {
2110                 int spaceleft, j;
2111                 size_t l;
2112
2113                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2114                         sizeof(struct dev_match_result));
2115
2116                 /*
2117                  * If we don't have enough space to put in another
2118                  * match result, save our position and tell the
2119                  * user there are more devices to check.
2120                  */
2121                 if (spaceleft < sizeof(struct dev_match_result)) {
2122                         struct periph_driver **pdrv;
2123
2124                         pdrv = NULL;
2125                         bzero(&cdm->pos, sizeof(cdm->pos));
2126                         cdm->pos.position_type =
2127                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2128                                 CAM_DEV_POS_PERIPH;
2129
2130                         /*
2131                          * This may look a bit non-sensical, but it is
2132                          * actually quite logical.  There are very few
2133                          * peripheral drivers, and bloating every peripheral
2134                          * structure with a pointer back to its parent
2135                          * peripheral driver linker set entry would cost
2136                          * more in the long run than doing this quick lookup.
2137                          */
2138                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2139                                 if (strcmp((*pdrv)->driver_name,
2140                                     periph->periph_name) == 0)
2141                                         break;
2142                         }
2143
2144                         if (*pdrv == NULL) {
2145                                 cdm->status = CAM_DEV_MATCH_ERROR;
2146                                 return(0);
2147                         }
2148
2149                         cdm->pos.cookie.pdrv = pdrv;
2150                         /*
2151                          * The periph generation slot does double duty, as
2152                          * does the periph pointer slot.  They are used for
2153                          * both edt and pdrv lookups and positioning.
2154                          */
2155                         cdm->pos.cookie.periph = periph;
2156                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2157                                 (*pdrv)->generation;
2158                         cdm->status = CAM_DEV_MATCH_MORE;
2159                         return(0);
2160                 }
2161
2162                 j = cdm->num_matches;
2163                 cdm->num_matches++;
2164                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2165                 cdm->matches[j].result.periph_result.path_id =
2166                         periph->path->bus->path_id;
2167
2168                 /*
2169                  * The transport layer peripheral doesn't have a target or
2170                  * lun.
2171                  */
2172                 if (periph->path->target)
2173                         cdm->matches[j].result.periph_result.target_id =
2174                                 periph->path->target->target_id;
2175                 else
2176                         cdm->matches[j].result.periph_result.target_id =
2177                                 CAM_TARGET_WILDCARD;
2178
2179                 if (periph->path->device)
2180                         cdm->matches[j].result.periph_result.target_lun =
2181                                 periph->path->device->lun_id;
2182                 else
2183                         cdm->matches[j].result.periph_result.target_lun =
2184                                 CAM_LUN_WILDCARD;
2185
2186                 cdm->matches[j].result.periph_result.unit_number =
2187                         periph->unit_number;
2188                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2189                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2190                         periph->periph_name, l);
2191         }
2192
2193         return(1);
2194 }
2195
2196 static int
2197 xptperiphlistmatch(struct ccb_dev_match *cdm)
2198 {
2199         int ret;
2200
2201         cdm->num_matches = 0;
2202
2203         /*
2204          * At this point in the edt traversal function, we check the bus
2205          * list generation to make sure that no buses have been added or
2206          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2207          * For the peripheral driver list traversal function, however, we
2208          * don't have to worry about new peripheral driver types coming or
2209          * going; they're in a linker set, and therefore can't change
2210          * without a recompile.
2211          */
2212
2213         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2214          && (cdm->pos.cookie.pdrv != NULL))
2215                 ret = xptpdrvtraverse(
2216                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2217                                 xptplistpdrvfunc, cdm);
2218         else
2219                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2220
2221         /*
2222          * If we get back 0, that means that we had to stop before fully
2223          * traversing the peripheral driver tree.  It also means that one of
2224          * the subroutines has set the status field to the proper value.  If
2225          * we get back 1, we've fully traversed the EDT and copied out any
2226          * matching entries.
2227          */
2228         if (ret == 1)
2229                 cdm->status = CAM_DEV_MATCH_LAST;
2230
2231         return(ret);
2232 }
2233
2234 static int
2235 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2236 {
2237         struct cam_eb *bus, *next_bus;
2238         int retval;
2239
2240         retval = 1;
2241         if (start_bus)
2242                 bus = start_bus;
2243         else {
2244                 xpt_lock_buses();
2245                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2246                 if (bus == NULL) {
2247                         xpt_unlock_buses();
2248                         return (retval);
2249                 }
2250                 bus->refcount++;
2251                 xpt_unlock_buses();
2252         }
2253         for (; bus != NULL; bus = next_bus) {
2254                 retval = tr_func(bus, arg);
2255                 if (retval == 0) {
2256                         xpt_release_bus(bus);
2257                         break;
2258                 }
2259                 xpt_lock_buses();
2260                 next_bus = TAILQ_NEXT(bus, links);
2261                 if (next_bus)
2262                         next_bus->refcount++;
2263                 xpt_unlock_buses();
2264                 xpt_release_bus(bus);
2265         }
2266         return(retval);
2267 }
2268
2269 static int
2270 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2271                   xpt_targetfunc_t *tr_func, void *arg)
2272 {
2273         struct cam_et *target, *next_target;
2274         int retval;
2275
2276         retval = 1;
2277         if (start_target)
2278                 target = start_target;
2279         else {
2280                 mtx_lock(&bus->eb_mtx);
2281                 target = TAILQ_FIRST(&bus->et_entries);
2282                 if (target == NULL) {
2283                         mtx_unlock(&bus->eb_mtx);
2284                         return (retval);
2285                 }
2286                 target->refcount++;
2287                 mtx_unlock(&bus->eb_mtx);
2288         }
2289         for (; target != NULL; target = next_target) {
2290                 retval = tr_func(target, arg);
2291                 if (retval == 0) {
2292                         xpt_release_target(target);
2293                         break;
2294                 }
2295                 mtx_lock(&bus->eb_mtx);
2296                 next_target = TAILQ_NEXT(target, links);
2297                 if (next_target)
2298                         next_target->refcount++;
2299                 mtx_unlock(&bus->eb_mtx);
2300                 xpt_release_target(target);
2301         }
2302         return(retval);
2303 }
2304
2305 static int
2306 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2307                   xpt_devicefunc_t *tr_func, void *arg)
2308 {
2309         struct cam_eb *bus;
2310         struct cam_ed *device, *next_device;
2311         int retval;
2312
2313         retval = 1;
2314         bus = target->bus;
2315         if (start_device)
2316                 device = start_device;
2317         else {
2318                 mtx_lock(&bus->eb_mtx);
2319                 device = TAILQ_FIRST(&target->ed_entries);
2320                 if (device == NULL) {
2321                         mtx_unlock(&bus->eb_mtx);
2322                         return (retval);
2323                 }
2324                 device->refcount++;
2325                 mtx_unlock(&bus->eb_mtx);
2326         }
2327         for (; device != NULL; device = next_device) {
2328                 mtx_lock(&device->device_mtx);
2329                 retval = tr_func(device, arg);
2330                 mtx_unlock(&device->device_mtx);
2331                 if (retval == 0) {
2332                         xpt_release_device(device);
2333                         break;
2334                 }
2335                 mtx_lock(&bus->eb_mtx);
2336                 next_device = TAILQ_NEXT(device, links);
2337                 if (next_device)
2338                         next_device->refcount++;
2339                 mtx_unlock(&bus->eb_mtx);
2340                 xpt_release_device(device);
2341         }
2342         return(retval);
2343 }
2344
2345 static int
2346 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2347                   xpt_periphfunc_t *tr_func, void *arg)
2348 {
2349         struct cam_eb *bus;
2350         struct cam_periph *periph, *next_periph;
2351         int retval;
2352
2353         retval = 1;
2354
2355         bus = device->target->bus;
2356         if (start_periph)
2357                 periph = start_periph;
2358         else {
2359                 xpt_lock_buses();
2360                 mtx_lock(&bus->eb_mtx);
2361                 periph = SLIST_FIRST(&device->periphs);
2362                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2363                         periph = SLIST_NEXT(periph, periph_links);
2364                 if (periph == NULL) {
2365                         mtx_unlock(&bus->eb_mtx);
2366                         xpt_unlock_buses();
2367                         return (retval);
2368                 }
2369                 periph->refcount++;
2370                 mtx_unlock(&bus->eb_mtx);
2371                 xpt_unlock_buses();
2372         }
2373         for (; periph != NULL; periph = next_periph) {
2374                 retval = tr_func(periph, arg);
2375                 if (retval == 0) {
2376                         cam_periph_release_locked(periph);
2377                         break;
2378                 }
2379                 xpt_lock_buses();
2380                 mtx_lock(&bus->eb_mtx);
2381                 next_periph = SLIST_NEXT(periph, periph_links);
2382                 while (next_periph != NULL &&
2383                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2384                         next_periph = SLIST_NEXT(next_periph, periph_links);
2385                 if (next_periph)
2386                         next_periph->refcount++;
2387                 mtx_unlock(&bus->eb_mtx);
2388                 xpt_unlock_buses();
2389                 cam_periph_release_locked(periph);
2390         }
2391         return(retval);
2392 }
2393
2394 static int
2395 xptpdrvtraverse(struct periph_driver **start_pdrv,
2396                 xpt_pdrvfunc_t *tr_func, void *arg)
2397 {
2398         struct periph_driver **pdrv;
2399         int retval;
2400
2401         retval = 1;
2402
2403         /*
2404          * We don't traverse the peripheral driver list like we do the
2405          * other lists, because it is a linker set, and therefore cannot be
2406          * changed during runtime.  If the peripheral driver list is ever
2407          * re-done to be something other than a linker set (i.e. it can
2408          * change while the system is running), the list traversal should
2409          * be modified to work like the other traversal functions.
2410          */
2411         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2412              *pdrv != NULL; pdrv++) {
2413                 retval = tr_func(pdrv, arg);
2414
2415                 if (retval == 0)
2416                         return(retval);
2417         }
2418
2419         return(retval);
2420 }
2421
2422 static int
2423 xptpdperiphtraverse(struct periph_driver **pdrv,
2424                     struct cam_periph *start_periph,
2425                     xpt_periphfunc_t *tr_func, void *arg)
2426 {
2427         struct cam_periph *periph, *next_periph;
2428         int retval;
2429
2430         retval = 1;
2431
2432         if (start_periph)
2433                 periph = start_periph;
2434         else {
2435                 xpt_lock_buses();
2436                 periph = TAILQ_FIRST(&(*pdrv)->units);
2437                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2438                         periph = TAILQ_NEXT(periph, unit_links);
2439                 if (periph == NULL) {
2440                         xpt_unlock_buses();
2441                         return (retval);
2442                 }
2443                 periph->refcount++;
2444                 xpt_unlock_buses();
2445         }
2446         for (; periph != NULL; periph = next_periph) {
2447                 cam_periph_lock(periph);
2448                 retval = tr_func(periph, arg);
2449                 cam_periph_unlock(periph);
2450                 if (retval == 0) {
2451                         cam_periph_release(periph);
2452                         break;
2453                 }
2454                 xpt_lock_buses();
2455                 next_periph = TAILQ_NEXT(periph, unit_links);
2456                 while (next_periph != NULL &&
2457                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2458                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2459                 if (next_periph)
2460                         next_periph->refcount++;
2461                 xpt_unlock_buses();
2462                 cam_periph_release(periph);
2463         }
2464         return(retval);
2465 }
2466
2467 static int
2468 xptdefbusfunc(struct cam_eb *bus, void *arg)
2469 {
2470         struct xpt_traverse_config *tr_config;
2471
2472         tr_config = (struct xpt_traverse_config *)arg;
2473
2474         if (tr_config->depth == XPT_DEPTH_BUS) {
2475                 xpt_busfunc_t *tr_func;
2476
2477                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2478
2479                 return(tr_func(bus, tr_config->tr_arg));
2480         } else
2481                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2482 }
2483
2484 static int
2485 xptdeftargetfunc(struct cam_et *target, void *arg)
2486 {
2487         struct xpt_traverse_config *tr_config;
2488
2489         tr_config = (struct xpt_traverse_config *)arg;
2490
2491         if (tr_config->depth == XPT_DEPTH_TARGET) {
2492                 xpt_targetfunc_t *tr_func;
2493
2494                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2495
2496                 return(tr_func(target, tr_config->tr_arg));
2497         } else
2498                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2499 }
2500
2501 static int
2502 xptdefdevicefunc(struct cam_ed *device, void *arg)
2503 {
2504         struct xpt_traverse_config *tr_config;
2505
2506         tr_config = (struct xpt_traverse_config *)arg;
2507
2508         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2509                 xpt_devicefunc_t *tr_func;
2510
2511                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2512
2513                 return(tr_func(device, tr_config->tr_arg));
2514         } else
2515                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2516 }
2517
2518 static int
2519 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2520 {
2521         struct xpt_traverse_config *tr_config;
2522         xpt_periphfunc_t *tr_func;
2523
2524         tr_config = (struct xpt_traverse_config *)arg;
2525
2526         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2527
2528         /*
2529          * Unlike the other default functions, we don't check for depth
2530          * here.  The peripheral driver level is the last level in the EDT,
2531          * so if we're here, we should execute the function in question.
2532          */
2533         return(tr_func(periph, tr_config->tr_arg));
2534 }
2535
2536 /*
2537  * Execute the given function for every bus in the EDT.
2538  */
2539 static int
2540 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2541 {
2542         struct xpt_traverse_config tr_config;
2543
2544         tr_config.depth = XPT_DEPTH_BUS;
2545         tr_config.tr_func = tr_func;
2546         tr_config.tr_arg = arg;
2547
2548         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2549 }
2550
2551 /*
2552  * Execute the given function for every device in the EDT.
2553  */
2554 static int
2555 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2556 {
2557         struct xpt_traverse_config tr_config;
2558
2559         tr_config.depth = XPT_DEPTH_DEVICE;
2560         tr_config.tr_func = tr_func;
2561         tr_config.tr_arg = arg;
2562
2563         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2564 }
2565
2566 static int
2567 xptsetasyncfunc(struct cam_ed *device, void *arg)
2568 {
2569         struct cam_path path;
2570         struct ccb_getdev cgd;
2571         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2572
2573         /*
2574          * Don't report unconfigured devices (Wildcard devs,
2575          * devices only for target mode, device instances
2576          * that have been invalidated but are waiting for
2577          * their last reference count to be released).
2578          */
2579         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2580                 return (1);
2581
2582         xpt_compile_path(&path,
2583                          NULL,
2584                          device->target->bus->path_id,
2585                          device->target->target_id,
2586                          device->lun_id);
2587         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2588         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2589         xpt_action((union ccb *)&cgd);
2590         csa->callback(csa->callback_arg,
2591                             AC_FOUND_DEVICE,
2592                             &path, &cgd);
2593         xpt_release_path(&path);
2594
2595         return(1);
2596 }
2597
2598 static int
2599 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2600 {
2601         struct cam_path path;
2602         struct ccb_pathinq cpi;
2603         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2604
2605         xpt_compile_path(&path, /*periph*/NULL,
2606                          bus->path_id,
2607                          CAM_TARGET_WILDCARD,
2608                          CAM_LUN_WILDCARD);
2609         xpt_path_lock(&path);
2610         xpt_path_inq(&cpi, &path);
2611         csa->callback(csa->callback_arg,
2612                             AC_PATH_REGISTERED,
2613                             &path, &cpi);
2614         xpt_path_unlock(&path);
2615         xpt_release_path(&path);
2616
2617         return(1);
2618 }
2619
2620 void
2621 xpt_action(union ccb *start_ccb)
2622 {
2623
2624         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2625             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2626                 xpt_action_name(start_ccb->ccb_h.func_code)));
2627
2628         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2629         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2630 }
2631
2632 void
2633 xpt_action_default(union ccb *start_ccb)
2634 {
2635         struct cam_path *path;
2636         struct cam_sim *sim;
2637         struct mtx *mtx;
2638
2639         path = start_ccb->ccb_h.path;
2640         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2641             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2642                 xpt_action_name(start_ccb->ccb_h.func_code)));
2643
2644         switch (start_ccb->ccb_h.func_code) {
2645         case XPT_SCSI_IO:
2646         {
2647                 struct cam_ed *device;
2648
2649                 /*
2650                  * For the sake of compatibility with SCSI-1
2651                  * devices that may not understand the identify
2652                  * message, we include lun information in the
2653                  * second byte of all commands.  SCSI-1 specifies
2654                  * that luns are a 3 bit value and reserves only 3
2655                  * bits for lun information in the CDB.  Later
2656                  * revisions of the SCSI spec allow for more than 8
2657                  * luns, but have deprecated lun information in the
2658                  * CDB.  So, if the lun won't fit, we must omit.
2659                  *
2660                  * Also be aware that during initial probing for devices,
2661                  * the inquiry information is unknown but initialized to 0.
2662                  * This means that this code will be exercised while probing
2663                  * devices with an ANSI revision greater than 2.
2664                  */
2665                 device = path->device;
2666                 if (device->protocol_version <= SCSI_REV_2
2667                  && start_ccb->ccb_h.target_lun < 8
2668                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2669
2670                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2671                             start_ccb->ccb_h.target_lun << 5;
2672                 }
2673                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2674         }
2675         /* FALLTHROUGH */
2676         case XPT_TARGET_IO:
2677         case XPT_CONT_TARGET_IO:
2678                 start_ccb->csio.sense_resid = 0;
2679                 start_ccb->csio.resid = 0;
2680                 /* FALLTHROUGH */
2681         case XPT_ATA_IO:
2682                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2683                         start_ccb->ataio.resid = 0;
2684                 /* FALLTHROUGH */
2685         case XPT_NVME_IO:
2686                 /* FALLTHROUGH */
2687         case XPT_NVME_ADMIN:
2688                 /* FALLTHROUGH */
2689         case XPT_MMC_IO:
2690                 /* XXX just like nmve_io? */
2691         case XPT_RESET_DEV:
2692         case XPT_ENG_EXEC:
2693         case XPT_SMP_IO:
2694         {
2695                 struct cam_devq *devq;
2696
2697                 devq = path->bus->sim->devq;
2698                 mtx_lock(&devq->send_mtx);
2699                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2700                 if (xpt_schedule_devq(devq, path->device) != 0)
2701                         xpt_run_devq(devq);
2702                 mtx_unlock(&devq->send_mtx);
2703                 break;
2704         }
2705         case XPT_CALC_GEOMETRY:
2706                 /* Filter out garbage */
2707                 if (start_ccb->ccg.block_size == 0
2708                  || start_ccb->ccg.volume_size == 0) {
2709                         start_ccb->ccg.cylinders = 0;
2710                         start_ccb->ccg.heads = 0;
2711                         start_ccb->ccg.secs_per_track = 0;
2712                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2713                         break;
2714                 }
2715 #if defined(__sparc64__)
2716                 /*
2717                  * For sparc64, we may need adjust the geometry of large
2718                  * disks in order to fit the limitations of the 16-bit
2719                  * fields of the VTOC8 disk label.
2720                  */
2721                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2722                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2723                         break;
2724                 }
2725 #endif
2726                 goto call_sim;
2727         case XPT_ABORT:
2728         {
2729                 union ccb* abort_ccb;
2730
2731                 abort_ccb = start_ccb->cab.abort_ccb;
2732                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2733                         struct cam_ed *device;
2734                         struct cam_devq *devq;
2735
2736                         device = abort_ccb->ccb_h.path->device;
2737                         devq = device->sim->devq;
2738
2739                         mtx_lock(&devq->send_mtx);
2740                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2741                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2742                                 abort_ccb->ccb_h.status =
2743                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2744                                 xpt_freeze_devq_device(device, 1);
2745                                 mtx_unlock(&devq->send_mtx);
2746                                 xpt_done(abort_ccb);
2747                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2748                                 break;
2749                         }
2750                         mtx_unlock(&devq->send_mtx);
2751
2752                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2753                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2754                                 /*
2755                                  * We've caught this ccb en route to
2756                                  * the SIM.  Flag it for abort and the
2757                                  * SIM will do so just before starting
2758                                  * real work on the CCB.
2759                                  */
2760                                 abort_ccb->ccb_h.status =
2761                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2762                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2763                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2764                                 break;
2765                         }
2766                 }
2767                 if (XPT_FC_IS_QUEUED(abort_ccb)
2768                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2769                         /*
2770                          * It's already completed but waiting
2771                          * for our SWI to get to it.
2772                          */
2773                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2774                         break;
2775                 }
2776                 /*
2777                  * If we weren't able to take care of the abort request
2778                  * in the XPT, pass the request down to the SIM for processing.
2779                  */
2780         }
2781         /* FALLTHROUGH */
2782         case XPT_ACCEPT_TARGET_IO:
2783         case XPT_EN_LUN:
2784         case XPT_IMMED_NOTIFY:
2785         case XPT_NOTIFY_ACK:
2786         case XPT_RESET_BUS:
2787         case XPT_IMMEDIATE_NOTIFY:
2788         case XPT_NOTIFY_ACKNOWLEDGE:
2789         case XPT_GET_SIM_KNOB_OLD:
2790         case XPT_GET_SIM_KNOB:
2791         case XPT_SET_SIM_KNOB:
2792         case XPT_GET_TRAN_SETTINGS:
2793         case XPT_SET_TRAN_SETTINGS:
2794         case XPT_PATH_INQ:
2795 call_sim:
2796                 sim = path->bus->sim;
2797                 mtx = sim->mtx;
2798                 if (mtx && !mtx_owned(mtx))
2799                         mtx_lock(mtx);
2800                 else
2801                         mtx = NULL;
2802
2803                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2804                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2805                 (*(sim->sim_action))(sim, start_ccb);
2806                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2807                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2808                 if (mtx)
2809                         mtx_unlock(mtx);
2810                 break;
2811         case XPT_PATH_STATS:
2812                 start_ccb->cpis.last_reset = path->bus->last_reset;
2813                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2814                 break;
2815         case XPT_GDEV_TYPE:
2816         {
2817                 struct cam_ed *dev;
2818
2819                 dev = path->device;
2820                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2821                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2822                 } else {
2823                         struct ccb_getdev *cgd;
2824
2825                         cgd = &start_ccb->cgd;
2826                         cgd->protocol = dev->protocol;
2827                         cgd->inq_data = dev->inq_data;
2828                         cgd->ident_data = dev->ident_data;
2829                         cgd->inq_flags = dev->inq_flags;
2830                         cgd->ccb_h.status = CAM_REQ_CMP;
2831                         cgd->serial_num_len = dev->serial_num_len;
2832                         if ((dev->serial_num_len > 0)
2833                          && (dev->serial_num != NULL))
2834                                 bcopy(dev->serial_num, cgd->serial_num,
2835                                       dev->serial_num_len);
2836                 }
2837                 break;
2838         }
2839         case XPT_GDEV_STATS:
2840         {
2841                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2842                 struct cam_ed *dev = path->device;
2843                 struct cam_eb *bus = path->bus;
2844                 struct cam_et *tar = path->target;
2845                 struct cam_devq *devq = bus->sim->devq;
2846
2847                 mtx_lock(&devq->send_mtx);
2848                 cgds->dev_openings = dev->ccbq.dev_openings;
2849                 cgds->dev_active = dev->ccbq.dev_active;
2850                 cgds->allocated = dev->ccbq.allocated;
2851                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2852                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2853                 cgds->last_reset = tar->last_reset;
2854                 cgds->maxtags = dev->maxtags;
2855                 cgds->mintags = dev->mintags;
2856                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2857                         cgds->last_reset = bus->last_reset;
2858                 mtx_unlock(&devq->send_mtx);
2859                 cgds->ccb_h.status = CAM_REQ_CMP;
2860                 break;
2861         }
2862         case XPT_GDEVLIST:
2863         {
2864                 struct cam_periph       *nperiph;
2865                 struct periph_list      *periph_head;
2866                 struct ccb_getdevlist   *cgdl;
2867                 u_int                   i;
2868                 struct cam_ed           *device;
2869                 int                     found;
2870
2871
2872                 found = 0;
2873
2874                 /*
2875                  * Don't want anyone mucking with our data.
2876                  */
2877                 device = path->device;
2878                 periph_head = &device->periphs;
2879                 cgdl = &start_ccb->cgdl;
2880
2881                 /*
2882                  * Check and see if the list has changed since the user
2883                  * last requested a list member.  If so, tell them that the
2884                  * list has changed, and therefore they need to start over
2885                  * from the beginning.
2886                  */
2887                 if ((cgdl->index != 0) &&
2888                     (cgdl->generation != device->generation)) {
2889                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2890                         break;
2891                 }
2892
2893                 /*
2894                  * Traverse the list of peripherals and attempt to find
2895                  * the requested peripheral.
2896                  */
2897                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2898                      (nperiph != NULL) && (i <= cgdl->index);
2899                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2900                         if (i == cgdl->index) {
2901                                 strlcpy(cgdl->periph_name,
2902                                         nperiph->periph_name,
2903                                         sizeof(cgdl->periph_name));
2904                                 cgdl->unit_number = nperiph->unit_number;
2905                                 found = 1;
2906                         }
2907                 }
2908                 if (found == 0) {
2909                         cgdl->status = CAM_GDEVLIST_ERROR;
2910                         break;
2911                 }
2912
2913                 if (nperiph == NULL)
2914                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2915                 else
2916                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2917
2918                 cgdl->index++;
2919                 cgdl->generation = device->generation;
2920
2921                 cgdl->ccb_h.status = CAM_REQ_CMP;
2922                 break;
2923         }
2924         case XPT_DEV_MATCH:
2925         {
2926                 dev_pos_type position_type;
2927                 struct ccb_dev_match *cdm;
2928
2929                 cdm = &start_ccb->cdm;
2930
2931                 /*
2932                  * There are two ways of getting at information in the EDT.
2933                  * The first way is via the primary EDT tree.  It starts
2934                  * with a list of buses, then a list of targets on a bus,
2935                  * then devices/luns on a target, and then peripherals on a
2936                  * device/lun.  The "other" way is by the peripheral driver
2937                  * lists.  The peripheral driver lists are organized by
2938                  * peripheral driver.  (obviously)  So it makes sense to
2939                  * use the peripheral driver list if the user is looking
2940                  * for something like "da1", or all "da" devices.  If the
2941                  * user is looking for something on a particular bus/target
2942                  * or lun, it's generally better to go through the EDT tree.
2943                  */
2944
2945                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2946                         position_type = cdm->pos.position_type;
2947                 else {
2948                         u_int i;
2949
2950                         position_type = CAM_DEV_POS_NONE;
2951
2952                         for (i = 0; i < cdm->num_patterns; i++) {
2953                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2954                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2955                                         position_type = CAM_DEV_POS_EDT;
2956                                         break;
2957                                 }
2958                         }
2959
2960                         if (cdm->num_patterns == 0)
2961                                 position_type = CAM_DEV_POS_EDT;
2962                         else if (position_type == CAM_DEV_POS_NONE)
2963                                 position_type = CAM_DEV_POS_PDRV;
2964                 }
2965
2966                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2967                 case CAM_DEV_POS_EDT:
2968                         xptedtmatch(cdm);
2969                         break;
2970                 case CAM_DEV_POS_PDRV:
2971                         xptperiphlistmatch(cdm);
2972                         break;
2973                 default:
2974                         cdm->status = CAM_DEV_MATCH_ERROR;
2975                         break;
2976                 }
2977
2978                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2979                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2980                 else
2981                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2982
2983                 break;
2984         }
2985         case XPT_SASYNC_CB:
2986         {
2987                 struct ccb_setasync *csa;
2988                 struct async_node *cur_entry;
2989                 struct async_list *async_head;
2990                 u_int32_t added;
2991
2992                 csa = &start_ccb->csa;
2993                 added = csa->event_enable;
2994                 async_head = &path->device->asyncs;
2995
2996                 /*
2997                  * If there is already an entry for us, simply
2998                  * update it.
2999                  */
3000                 cur_entry = SLIST_FIRST(async_head);
3001                 while (cur_entry != NULL) {
3002                         if ((cur_entry->callback_arg == csa->callback_arg)
3003                          && (cur_entry->callback == csa->callback))
3004                                 break;
3005                         cur_entry = SLIST_NEXT(cur_entry, links);
3006                 }
3007
3008                 if (cur_entry != NULL) {
3009                         /*
3010                          * If the request has no flags set,
3011                          * remove the entry.
3012                          */
3013                         added &= ~cur_entry->event_enable;
3014                         if (csa->event_enable == 0) {
3015                                 SLIST_REMOVE(async_head, cur_entry,
3016                                              async_node, links);
3017                                 xpt_release_device(path->device);
3018                                 free(cur_entry, M_CAMXPT);
3019                         } else {
3020                                 cur_entry->event_enable = csa->event_enable;
3021                         }
3022                         csa->event_enable = added;
3023                 } else {
3024                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3025                                            M_NOWAIT);
3026                         if (cur_entry == NULL) {
3027                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3028                                 break;
3029                         }
3030                         cur_entry->event_enable = csa->event_enable;
3031                         cur_entry->event_lock = (path->bus->sim->mtx &&
3032                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3033                         cur_entry->callback_arg = csa->callback_arg;
3034                         cur_entry->callback = csa->callback;
3035                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3036                         xpt_acquire_device(path->device);
3037                 }
3038                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3039                 break;
3040         }
3041         case XPT_REL_SIMQ:
3042         {
3043                 struct ccb_relsim *crs;
3044                 struct cam_ed *dev;
3045
3046                 crs = &start_ccb->crs;
3047                 dev = path->device;
3048                 if (dev == NULL) {
3049
3050                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3051                         break;
3052                 }
3053
3054                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3055
3056                         /* Don't ever go below one opening */
3057                         if (crs->openings > 0) {
3058                                 xpt_dev_ccbq_resize(path, crs->openings);
3059                                 if (bootverbose) {
3060                                         xpt_print(path,
3061                                             "number of openings is now %d\n",
3062                                             crs->openings);
3063                                 }
3064                         }
3065                 }
3066
3067                 mtx_lock(&dev->sim->devq->send_mtx);
3068                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3069
3070                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3071
3072                                 /*
3073                                  * Just extend the old timeout and decrement
3074                                  * the freeze count so that a single timeout
3075                                  * is sufficient for releasing the queue.
3076                                  */
3077                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3078                                 callout_stop(&dev->callout);
3079                         } else {
3080
3081                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3082                         }
3083
3084                         callout_reset_sbt(&dev->callout,
3085                             SBT_1MS * crs->release_timeout, 0,
3086                             xpt_release_devq_timeout, dev, 0);
3087
3088                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3089
3090                 }
3091
3092                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3093
3094                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3095                                 /*
3096                                  * Decrement the freeze count so that a single
3097                                  * completion is still sufficient to unfreeze
3098                                  * the queue.
3099                                  */
3100                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3101                         } else {
3102
3103                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3104                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3105                         }
3106                 }
3107
3108                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3109
3110                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3111                          || (dev->ccbq.dev_active == 0)) {
3112
3113                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3114                         } else {
3115
3116                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3117                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3118                         }
3119                 }
3120                 mtx_unlock(&dev->sim->devq->send_mtx);
3121
3122                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3123                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3124                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3125                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3126                 break;
3127         }
3128         case XPT_DEBUG: {
3129                 struct cam_path *oldpath;
3130
3131                 /* Check that all request bits are supported. */
3132                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3133                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3134                         break;
3135                 }
3136
3137                 cam_dflags = CAM_DEBUG_NONE;
3138                 if (cam_dpath != NULL) {
3139                         oldpath = cam_dpath;
3140                         cam_dpath = NULL;
3141                         xpt_free_path(oldpath);
3142                 }
3143                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3144                         if (xpt_create_path(&cam_dpath, NULL,
3145                                             start_ccb->ccb_h.path_id,
3146                                             start_ccb->ccb_h.target_id,
3147                                             start_ccb->ccb_h.target_lun) !=
3148                                             CAM_REQ_CMP) {
3149                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3150                         } else {
3151                                 cam_dflags = start_ccb->cdbg.flags;
3152                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3153                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3154                                     cam_dflags);
3155                         }
3156                 } else
3157                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3158                 break;
3159         }
3160         case XPT_NOOP:
3161                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3162                         xpt_freeze_devq(path, 1);
3163                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3164                 break;
3165         case XPT_REPROBE_LUN:
3166                 xpt_async(AC_INQ_CHANGED, path, NULL);
3167                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3168                 xpt_done(start_ccb);
3169                 break;
3170         default:
3171         case XPT_SDEV_TYPE:
3172         case XPT_TERM_IO:
3173         case XPT_ENG_INQ:
3174                 /* XXX Implement */
3175                 xpt_print(start_ccb->ccb_h.path,
3176                     "%s: CCB type %#x %s not supported\n", __func__,
3177                     start_ccb->ccb_h.func_code,
3178                     xpt_action_name(start_ccb->ccb_h.func_code));
3179                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3180                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3181                         xpt_done(start_ccb);
3182                 }
3183                 break;
3184         }
3185         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3186             ("xpt_action_default: func= %#x %s status %#x\n",
3187                 start_ccb->ccb_h.func_code,
3188                 xpt_action_name(start_ccb->ccb_h.func_code),
3189                 start_ccb->ccb_h.status));
3190 }
3191
3192 /*
3193  * Call the sim poll routine to allow the sim to complete
3194  * any inflight requests, then call camisr_runqueue to
3195  * complete any CCB that the polling completed.
3196  */
3197 void
3198 xpt_sim_poll(struct cam_sim *sim)
3199 {
3200         struct mtx *mtx;
3201
3202         mtx = sim->mtx;
3203         if (mtx)
3204                 mtx_lock(mtx);
3205         (*(sim->sim_poll))(sim);
3206         if (mtx)
3207                 mtx_unlock(mtx);
3208         camisr_runqueue();
3209 }
3210
3211 uint32_t
3212 xpt_poll_setup(union ccb *start_ccb)
3213 {
3214         u_int32_t timeout;
3215         struct    cam_sim *sim;
3216         struct    cam_devq *devq;
3217         struct    cam_ed *dev;
3218
3219         timeout = start_ccb->ccb_h.timeout * 10;
3220         sim = start_ccb->ccb_h.path->bus->sim;
3221         devq = sim->devq;
3222         dev = start_ccb->ccb_h.path->device;
3223
3224         /*
3225          * Steal an opening so that no other queued requests
3226          * can get it before us while we simulate interrupts.
3227          */
3228         mtx_lock(&devq->send_mtx);
3229         dev->ccbq.dev_openings--;
3230         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3231             (--timeout > 0)) {
3232                 mtx_unlock(&devq->send_mtx);
3233                 DELAY(100);
3234                 xpt_sim_poll(sim);
3235                 mtx_lock(&devq->send_mtx);
3236         }
3237         dev->ccbq.dev_openings++;
3238         mtx_unlock(&devq->send_mtx);
3239
3240         return (timeout);
3241 }
3242
3243 void
3244 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3245 {
3246
3247         while (--timeout > 0) {
3248                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3249                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3250                     != CAM_REQ_INPROG)
3251                         break;
3252                 DELAY(100);
3253         }
3254
3255         if (timeout == 0) {
3256                 /*
3257                  * XXX Is it worth adding a sim_timeout entry
3258                  * point so we can attempt recovery?  If
3259                  * this is only used for dumps, I don't think
3260                  * it is.
3261                  */
3262                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3263         }
3264 }
3265
3266 void
3267 xpt_polled_action(union ccb *start_ccb)
3268 {
3269         uint32_t        timeout;
3270         struct cam_ed   *dev;
3271
3272         timeout = start_ccb->ccb_h.timeout * 10;
3273         dev = start_ccb->ccb_h.path->device;
3274
3275         mtx_unlock(&dev->device_mtx);
3276
3277         timeout = xpt_poll_setup(start_ccb);
3278         if (timeout > 0) {
3279                 xpt_action(start_ccb);
3280                 xpt_pollwait(start_ccb, timeout);
3281         } else {
3282                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3283         }
3284
3285         mtx_lock(&dev->device_mtx);
3286 }
3287
3288 /*
3289  * Schedule a peripheral driver to receive a ccb when its
3290  * target device has space for more transactions.
3291  */
3292 void
3293 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3294 {
3295
3296         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3297         cam_periph_assert(periph, MA_OWNED);
3298         if (new_priority < periph->scheduled_priority) {
3299                 periph->scheduled_priority = new_priority;
3300                 xpt_run_allocq(periph, 0);
3301         }
3302 }
3303
3304
3305 /*
3306  * Schedule a device to run on a given queue.
3307  * If the device was inserted as a new entry on the queue,
3308  * return 1 meaning the device queue should be run. If we
3309  * were already queued, implying someone else has already
3310  * started the queue, return 0 so the caller doesn't attempt
3311  * to run the queue.
3312  */
3313 static int
3314 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3315                  u_int32_t new_priority)
3316 {
3317         int retval;
3318         u_int32_t old_priority;
3319
3320         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3321
3322
3323         old_priority = pinfo->priority;
3324
3325         /*
3326          * Are we already queued?
3327          */
3328         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3329                 /* Simply reorder based on new priority */
3330                 if (new_priority < old_priority) {
3331                         camq_change_priority(queue, pinfo->index,
3332                                              new_priority);
3333                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3334                                         ("changed priority to %d\n",
3335                                          new_priority));
3336                         retval = 1;
3337                 } else
3338                         retval = 0;
3339         } else {
3340                 /* New entry on the queue */
3341                 if (new_priority < old_priority)
3342                         pinfo->priority = new_priority;
3343
3344                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3345                                 ("Inserting onto queue\n"));
3346                 pinfo->generation = ++queue->generation;
3347                 camq_insert(queue, pinfo);
3348                 retval = 1;
3349         }
3350         return (retval);
3351 }
3352
3353 static void
3354 xpt_run_allocq_task(void *context, int pending)
3355 {
3356         struct cam_periph *periph = context;
3357
3358         cam_periph_lock(periph);
3359         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3360         xpt_run_allocq(periph, 1);
3361         cam_periph_unlock(periph);
3362         cam_periph_release(periph);
3363 }
3364
3365 static void
3366 xpt_run_allocq(struct cam_periph *periph, int sleep)
3367 {
3368         struct cam_ed   *device;
3369         union ccb       *ccb;
3370         uint32_t         prio;
3371
3372         cam_periph_assert(periph, MA_OWNED);
3373         if (periph->periph_allocating)
3374                 return;
3375         cam_periph_doacquire(periph);
3376         periph->periph_allocating = 1;
3377         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3378         device = periph->path->device;
3379         ccb = NULL;
3380 restart:
3381         while ((prio = min(periph->scheduled_priority,
3382             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3383             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3384              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3385
3386                 if (ccb == NULL &&
3387                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3388                         if (sleep) {
3389                                 ccb = xpt_get_ccb(periph);
3390                                 goto restart;
3391                         }
3392                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3393                                 break;
3394                         cam_periph_doacquire(periph);
3395                         periph->flags |= CAM_PERIPH_RUN_TASK;
3396                         taskqueue_enqueue(xsoftc.xpt_taskq,
3397                             &periph->periph_run_task);
3398                         break;
3399                 }
3400                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3401                 if (prio == periph->immediate_priority) {
3402                         periph->immediate_priority = CAM_PRIORITY_NONE;
3403                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3404                                         ("waking cam_periph_getccb()\n"));
3405                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3406                                           periph_links.sle);
3407                         wakeup(&periph->ccb_list);
3408                 } else {
3409                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3410                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3411                                         ("calling periph_start()\n"));
3412                         periph->periph_start(periph, ccb);
3413                 }
3414                 ccb = NULL;
3415         }
3416         if (ccb != NULL)
3417                 xpt_release_ccb(ccb);
3418         periph->periph_allocating = 0;
3419         cam_periph_release_locked(periph);
3420 }
3421
3422 static void
3423 xpt_run_devq(struct cam_devq *devq)
3424 {
3425         struct mtx *mtx;
3426
3427         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3428
3429         devq->send_queue.qfrozen_cnt++;
3430         while ((devq->send_queue.entries > 0)
3431             && (devq->send_openings > 0)
3432             && (devq->send_queue.qfrozen_cnt <= 1)) {
3433                 struct  cam_ed *device;
3434                 union ccb *work_ccb;
3435                 struct  cam_sim *sim;
3436                 struct xpt_proto *proto;
3437
3438                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3439                                                            CAMQ_HEAD);
3440                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3441                                 ("running device %p\n", device));
3442
3443                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3444                 if (work_ccb == NULL) {
3445                         printf("device on run queue with no ccbs???\n");
3446                         continue;
3447                 }
3448
3449                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3450
3451                         mtx_lock(&xsoftc.xpt_highpower_lock);
3452                         if (xsoftc.num_highpower <= 0) {
3453                                 /*
3454                                  * We got a high power command, but we
3455                                  * don't have any available slots.  Freeze
3456                                  * the device queue until we have a slot
3457                                  * available.
3458                                  */
3459                                 xpt_freeze_devq_device(device, 1);
3460                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3461                                                    highpowerq_entry);
3462
3463                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3464                                 continue;
3465                         } else {
3466                                 /*
3467                                  * Consume a high power slot while
3468                                  * this ccb runs.
3469                                  */
3470                                 xsoftc.num_highpower--;
3471                         }
3472                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3473                 }
3474                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3475                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3476                 devq->send_openings--;
3477                 devq->send_active++;
3478                 xpt_schedule_devq(devq, device);
3479                 mtx_unlock(&devq->send_mtx);
3480
3481                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3482                         /*
3483                          * The client wants to freeze the queue
3484                          * after this CCB is sent.
3485                          */
3486                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3487                 }
3488
3489                 /* In Target mode, the peripheral driver knows best... */
3490                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3491                         if ((device->inq_flags & SID_CmdQue) != 0
3492                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3493                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3494                         else
3495                                 /*
3496                                  * Clear this in case of a retried CCB that
3497                                  * failed due to a rejected tag.
3498                                  */
3499                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3500                 }
3501
3502                 KASSERT(device == work_ccb->ccb_h.path->device,
3503                     ("device (%p) / path->device (%p) mismatch",
3504                         device, work_ccb->ccb_h.path->device));
3505                 proto = xpt_proto_find(device->protocol);
3506                 if (proto && proto->ops->debug_out)
3507                         proto->ops->debug_out(work_ccb);
3508
3509                 /*
3510                  * Device queues can be shared among multiple SIM instances
3511                  * that reside on different buses.  Use the SIM from the
3512                  * queued device, rather than the one from the calling bus.
3513                  */
3514                 sim = device->sim;
3515                 mtx = sim->mtx;
3516                 if (mtx && !mtx_owned(mtx))
3517                         mtx_lock(mtx);
3518                 else
3519                         mtx = NULL;
3520                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3521                 (*(sim->sim_action))(sim, work_ccb);
3522                 if (mtx)
3523                         mtx_unlock(mtx);
3524                 mtx_lock(&devq->send_mtx);
3525         }
3526         devq->send_queue.qfrozen_cnt--;
3527 }
3528
3529 /*
3530  * This function merges stuff from the slave ccb into the master ccb, while
3531  * keeping important fields in the master ccb constant.
3532  */
3533 void
3534 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3535 {
3536
3537         /*
3538          * Pull fields that are valid for peripheral drivers to set
3539          * into the master CCB along with the CCB "payload".
3540          */
3541         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3542         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3543         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3544         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3545         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3546               sizeof(union ccb) - sizeof(struct ccb_hdr));
3547 }
3548
3549 void
3550 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3551                     u_int32_t priority, u_int32_t flags)
3552 {
3553
3554         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3555         ccb_h->pinfo.priority = priority;
3556         ccb_h->path = path;
3557         ccb_h->path_id = path->bus->path_id;
3558         if (path->target)
3559                 ccb_h->target_id = path->target->target_id;
3560         else
3561                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3562         if (path->device) {
3563                 ccb_h->target_lun = path->device->lun_id;
3564                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3565         } else {
3566                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3567         }
3568         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3569         ccb_h->flags = flags;
3570         ccb_h->xflags = 0;
3571 }
3572
3573 void
3574 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3575 {
3576         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3577 }
3578
3579 /* Path manipulation functions */
3580 cam_status
3581 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3582                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3583 {
3584         struct     cam_path *path;
3585         cam_status status;
3586
3587         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3588
3589         if (path == NULL) {
3590                 status = CAM_RESRC_UNAVAIL;
3591                 return(status);
3592         }
3593         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3594         if (status != CAM_REQ_CMP) {
3595                 free(path, M_CAMPATH);
3596                 path = NULL;
3597         }
3598         *new_path_ptr = path;
3599         return (status);
3600 }
3601
3602 cam_status
3603 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3604                          struct cam_periph *periph, path_id_t path_id,
3605                          target_id_t target_id, lun_id_t lun_id)
3606 {
3607
3608         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3609             lun_id));
3610 }
3611
3612 cam_status
3613 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3614                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3615 {
3616         struct       cam_eb *bus;
3617         struct       cam_et *target;
3618         struct       cam_ed *device;
3619         cam_status   status;
3620
3621         status = CAM_REQ_CMP;   /* Completed without error */
3622         target = NULL;          /* Wildcarded */
3623         device = NULL;          /* Wildcarded */
3624
3625         /*
3626          * We will potentially modify the EDT, so block interrupts
3627          * that may attempt to create cam paths.
3628          */
3629         bus = xpt_find_bus(path_id);
3630         if (bus == NULL) {
3631                 status = CAM_PATH_INVALID;
3632         } else {
3633                 xpt_lock_buses();
3634                 mtx_lock(&bus->eb_mtx);
3635                 target = xpt_find_target(bus, target_id);
3636                 if (target == NULL) {
3637                         /* Create one */
3638                         struct cam_et *new_target;
3639
3640                         new_target = xpt_alloc_target(bus, target_id);
3641                         if (new_target == NULL) {
3642                                 status = CAM_RESRC_UNAVAIL;
3643                         } else {
3644                                 target = new_target;
3645                         }
3646                 }
3647                 xpt_unlock_buses();
3648                 if (target != NULL) {
3649                         device = xpt_find_device(target, lun_id);
3650                         if (device == NULL) {
3651                                 /* Create one */
3652                                 struct cam_ed *new_device;
3653
3654                                 new_device =
3655                                     (*(bus->xport->ops->alloc_device))(bus,
3656                                                                        target,
3657                                                                        lun_id);
3658                                 if (new_device == NULL) {
3659                                         status = CAM_RESRC_UNAVAIL;
3660                                 } else {
3661                                         device = new_device;
3662                                 }
3663                         }
3664                 }
3665                 mtx_unlock(&bus->eb_mtx);
3666         }
3667
3668         /*
3669          * Only touch the user's data if we are successful.
3670          */
3671         if (status == CAM_REQ_CMP) {
3672                 new_path->periph = perph;
3673                 new_path->bus = bus;
3674                 new_path->target = target;
3675                 new_path->device = device;
3676                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3677         } else {
3678                 if (device != NULL)
3679                         xpt_release_device(device);
3680                 if (target != NULL)
3681                         xpt_release_target(target);
3682                 if (bus != NULL)
3683                         xpt_release_bus(bus);
3684         }
3685         return (status);
3686 }
3687
3688 cam_status
3689 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3690 {
3691         struct     cam_path *new_path;
3692
3693         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3694         if (new_path == NULL)
3695                 return(CAM_RESRC_UNAVAIL);
3696         xpt_copy_path(new_path, path);
3697         *new_path_ptr = new_path;
3698         return (CAM_REQ_CMP);
3699 }
3700
3701 void
3702 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3703 {
3704
3705         *new_path = *path;
3706         if (path->bus != NULL)
3707                 xpt_acquire_bus(path->bus);
3708         if (path->target != NULL)
3709                 xpt_acquire_target(path->target);
3710         if (path->device != NULL)
3711                 xpt_acquire_device(path->device);
3712 }
3713
3714 void
3715 xpt_release_path(struct cam_path *path)
3716 {
3717         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3718         if (path->device != NULL) {
3719                 xpt_release_device(path->device);
3720                 path->device = NULL;
3721         }
3722         if (path->target != NULL) {
3723                 xpt_release_target(path->target);
3724                 path->target = NULL;
3725         }
3726         if (path->bus != NULL) {
3727                 xpt_release_bus(path->bus);
3728                 path->bus = NULL;
3729         }
3730 }
3731
3732 void
3733 xpt_free_path(struct cam_path *path)
3734 {
3735
3736         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3737         xpt_release_path(path);
3738         free(path, M_CAMPATH);
3739 }
3740
3741 void
3742 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3743     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3744 {
3745
3746         xpt_lock_buses();
3747         if (bus_ref) {
3748                 if (path->bus)
3749                         *bus_ref = path->bus->refcount;
3750                 else
3751                         *bus_ref = 0;
3752         }
3753         if (periph_ref) {
3754                 if (path->periph)
3755                         *periph_ref = path->periph->refcount;
3756                 else
3757                         *periph_ref = 0;
3758         }
3759         xpt_unlock_buses();
3760         if (target_ref) {
3761                 if (path->target)
3762                         *target_ref = path->target->refcount;
3763                 else
3764                         *target_ref = 0;
3765         }
3766         if (device_ref) {
3767                 if (path->device)
3768                         *device_ref = path->device->refcount;
3769                 else
3770                         *device_ref = 0;
3771         }
3772 }
3773
3774 /*
3775  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3776  * in path1, 2 for match with wildcards in path2.
3777  */
3778 int
3779 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3780 {
3781         int retval = 0;
3782
3783         if (path1->bus != path2->bus) {
3784                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3785                         retval = 1;
3786                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3787                         retval = 2;
3788                 else
3789                         return (-1);
3790         }
3791         if (path1->target != path2->target) {
3792                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3793                         if (retval == 0)
3794                                 retval = 1;
3795                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3796                         retval = 2;
3797                 else
3798                         return (-1);
3799         }
3800         if (path1->device != path2->device) {
3801                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3802                         if (retval == 0)
3803                                 retval = 1;
3804                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3805                         retval = 2;
3806                 else
3807                         return (-1);
3808         }
3809         return (retval);
3810 }
3811
3812 int
3813 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3814 {
3815         int retval = 0;
3816
3817         if (path->bus != dev->target->bus) {
3818                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3819                         retval = 1;
3820                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3821                         retval = 2;
3822                 else
3823                         return (-1);
3824         }
3825         if (path->target != dev->target) {
3826                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3827                         if (retval == 0)
3828                                 retval = 1;
3829                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3830                         retval = 2;
3831                 else
3832                         return (-1);
3833         }
3834         if (path->device != dev) {
3835                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3836                         if (retval == 0)
3837                                 retval = 1;
3838                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3839                         retval = 2;
3840                 else
3841                         return (-1);
3842         }
3843         return (retval);
3844 }
3845
3846 void
3847 xpt_print_path(struct cam_path *path)
3848 {
3849         struct sbuf sb;
3850         char buffer[XPT_PRINT_LEN];
3851
3852         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3853         xpt_path_sbuf(path, &sb);
3854         sbuf_finish(&sb);
3855         printf("%s", sbuf_data(&sb));
3856         sbuf_delete(&sb);
3857 }
3858
3859 void
3860 xpt_print_device(struct cam_ed *device)
3861 {
3862
3863         if (device == NULL)
3864                 printf("(nopath): ");
3865         else {
3866                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3867                        device->sim->unit_number,
3868                        device->sim->bus_id,
3869                        device->target->target_id,
3870                        (uintmax_t)device->lun_id);
3871         }
3872 }
3873
3874 void
3875 xpt_print(struct cam_path *path, const char *fmt, ...)
3876 {
3877         va_list ap;
3878         struct sbuf sb;
3879         char buffer[XPT_PRINT_LEN];
3880
3881         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3882
3883         xpt_path_sbuf(path, &sb);
3884         va_start(ap, fmt);
3885         sbuf_vprintf(&sb, fmt, ap);
3886         va_end(ap);
3887
3888         sbuf_finish(&sb);
3889         printf("%s", sbuf_data(&sb));
3890         sbuf_delete(&sb);
3891 }
3892
3893 int
3894 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3895 {
3896         struct sbuf sb;
3897         int len;
3898
3899         sbuf_new(&sb, str, str_len, 0);
3900         len = xpt_path_sbuf(path, &sb);
3901         sbuf_finish(&sb);
3902         return (len);
3903 }
3904
3905 int
3906 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3907 {
3908
3909         if (path == NULL)
3910                 sbuf_printf(sb, "(nopath): ");
3911         else {
3912                 if (path->periph != NULL)
3913                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3914                                     path->periph->unit_number);
3915                 else
3916                         sbuf_printf(sb, "(noperiph:");
3917
3918                 if (path->bus != NULL)
3919                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3920                                     path->bus->sim->unit_number,
3921                                     path->bus->sim->bus_id);
3922                 else
3923                         sbuf_printf(sb, "nobus:");
3924
3925                 if (path->target != NULL)
3926                         sbuf_printf(sb, "%d:", path->target->target_id);
3927                 else
3928                         sbuf_printf(sb, "X:");
3929
3930                 if (path->device != NULL)
3931                         sbuf_printf(sb, "%jx): ",
3932                             (uintmax_t)path->device->lun_id);
3933                 else
3934                         sbuf_printf(sb, "X): ");
3935         }
3936
3937         return(sbuf_len(sb));
3938 }
3939
3940 path_id_t
3941 xpt_path_path_id(struct cam_path *path)
3942 {
3943         return(path->bus->path_id);
3944 }
3945
3946 target_id_t
3947 xpt_path_target_id(struct cam_path *path)
3948 {
3949         if (path->target != NULL)
3950                 return (path->target->target_id);
3951         else
3952                 return (CAM_TARGET_WILDCARD);
3953 }
3954
3955 lun_id_t
3956 xpt_path_lun_id(struct cam_path *path)
3957 {
3958         if (path->device != NULL)
3959                 return (path->device->lun_id);
3960         else
3961                 return (CAM_LUN_WILDCARD);
3962 }
3963
3964 struct cam_sim *
3965 xpt_path_sim(struct cam_path *path)
3966 {
3967
3968         return (path->bus->sim);
3969 }
3970
3971 struct cam_periph*
3972 xpt_path_periph(struct cam_path *path)
3973 {
3974
3975         return (path->periph);
3976 }
3977
3978 /*
3979  * Release a CAM control block for the caller.  Remit the cost of the structure
3980  * to the device referenced by the path.  If the this device had no 'credits'
3981  * and peripheral drivers have registered async callbacks for this notification
3982  * call them now.
3983  */
3984 void
3985 xpt_release_ccb(union ccb *free_ccb)
3986 {
3987         struct   cam_ed *device;
3988         struct   cam_periph *periph;
3989
3990         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3991         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3992         device = free_ccb->ccb_h.path->device;
3993         periph = free_ccb->ccb_h.path->periph;
3994
3995         xpt_free_ccb(free_ccb);
3996         periph->periph_allocated--;
3997         cam_ccbq_release_opening(&device->ccbq);
3998         xpt_run_allocq(periph, 0);
3999 }
4000
4001 /* Functions accessed by SIM drivers */
4002
4003 static struct xpt_xport_ops xport_default_ops = {
4004         .alloc_device = xpt_alloc_device_default,
4005         .action = xpt_action_default,
4006         .async = xpt_dev_async_default,
4007 };
4008 static struct xpt_xport xport_default = {
4009         .xport = XPORT_UNKNOWN,
4010         .name = "unknown",
4011         .ops = &xport_default_ops,
4012 };
4013
4014 CAM_XPT_XPORT(xport_default);
4015
4016 /*
4017  * A sim structure, listing the SIM entry points and instance
4018  * identification info is passed to xpt_bus_register to hook the SIM
4019  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4020  * for this new bus and places it in the array of buses and assigns
4021  * it a path_id.  The path_id may be influenced by "hard wiring"
4022  * information specified by the user.  Once interrupt services are
4023  * available, the bus will be probed.
4024  */
4025 int32_t
4026 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4027 {
4028         struct cam_eb *new_bus;
4029         struct cam_eb *old_bus;
4030         struct ccb_pathinq cpi;
4031         struct cam_path *path;
4032         cam_status status;
4033
4034         sim->bus_id = bus;
4035         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4036                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4037         if (new_bus == NULL) {
4038                 /* Couldn't satisfy request */
4039                 return (CAM_RESRC_UNAVAIL);
4040         }
4041
4042         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4043         TAILQ_INIT(&new_bus->et_entries);
4044         cam_sim_hold(sim);
4045         new_bus->sim = sim;
4046         timevalclear(&new_bus->last_reset);
4047         new_bus->flags = 0;
4048         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4049         new_bus->generation = 0;
4050
4051         xpt_lock_buses();
4052         sim->path_id = new_bus->path_id =
4053             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4054         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4055         while (old_bus != NULL
4056             && old_bus->path_id < new_bus->path_id)
4057                 old_bus = TAILQ_NEXT(old_bus, links);
4058         if (old_bus != NULL)
4059                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4060         else
4061                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4062         xsoftc.bus_generation++;
4063         xpt_unlock_buses();
4064
4065         /*
4066          * Set a default transport so that a PATH_INQ can be issued to
4067          * the SIM.  This will then allow for probing and attaching of
4068          * a more appropriate transport.
4069          */
4070         new_bus->xport = &xport_default;
4071
4072         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4073                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4074         if (status != CAM_REQ_CMP) {
4075                 xpt_release_bus(new_bus);
4076                 return (CAM_RESRC_UNAVAIL);
4077         }
4078
4079         xpt_path_inq(&cpi, path);
4080
4081         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4082                 struct xpt_xport **xpt;
4083
4084                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4085                         if ((*xpt)->xport == cpi.transport) {
4086                                 new_bus->xport = *xpt;
4087                                 break;
4088                         }
4089                 }
4090                 if (new_bus->xport == NULL) {
4091                         xpt_print(path,
4092                             "No transport found for %d\n", cpi.transport);
4093                         xpt_release_bus(new_bus);
4094                         free(path, M_CAMXPT);
4095                         return (CAM_RESRC_UNAVAIL);
4096                 }
4097         }
4098
4099         /* Notify interested parties */
4100         if (sim->path_id != CAM_XPT_PATH_ID) {
4101
4102                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4103                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4104                         union   ccb *scan_ccb;
4105
4106                         /* Initiate bus rescan. */
4107                         scan_ccb = xpt_alloc_ccb_nowait();
4108                         if (scan_ccb != NULL) {
4109                                 scan_ccb->ccb_h.path = path;
4110                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4111                                 scan_ccb->crcn.flags = 0;
4112                                 xpt_rescan(scan_ccb);
4113                         } else {
4114                                 xpt_print(path,
4115                                           "Can't allocate CCB to scan bus\n");
4116                                 xpt_free_path(path);
4117                         }
4118                 } else
4119                         xpt_free_path(path);
4120         } else
4121                 xpt_free_path(path);
4122         return (CAM_SUCCESS);
4123 }
4124
4125 int32_t
4126 xpt_bus_deregister(path_id_t pathid)
4127 {
4128         struct cam_path bus_path;
4129         cam_status status;
4130
4131         status = xpt_compile_path(&bus_path, NULL, pathid,
4132                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4133         if (status != CAM_REQ_CMP)
4134                 return (status);
4135
4136         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4137         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4138
4139         /* Release the reference count held while registered. */
4140         xpt_release_bus(bus_path.bus);
4141         xpt_release_path(&bus_path);
4142
4143         return (CAM_REQ_CMP);
4144 }
4145
4146 static path_id_t
4147 xptnextfreepathid(void)
4148 {
4149         struct cam_eb *bus;
4150         path_id_t pathid;
4151         const char *strval;
4152
4153         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4154         pathid = 0;
4155         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4156 retry:
4157         /* Find an unoccupied pathid */
4158         while (bus != NULL && bus->path_id <= pathid) {
4159                 if (bus->path_id == pathid)
4160                         pathid++;
4161                 bus = TAILQ_NEXT(bus, links);
4162         }
4163
4164         /*
4165          * Ensure that this pathid is not reserved for
4166          * a bus that may be registered in the future.
4167          */
4168         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4169                 ++pathid;
4170                 /* Start the search over */
4171                 goto retry;
4172         }
4173         return (pathid);
4174 }
4175
4176 static path_id_t
4177 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4178 {
4179         path_id_t pathid;
4180         int i, dunit, val;
4181         char buf[32];
4182         const char *dname;
4183
4184         pathid = CAM_XPT_PATH_ID;
4185         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4186         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4187                 return (pathid);
4188         i = 0;
4189         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4190                 if (strcmp(dname, "scbus")) {
4191                         /* Avoid a bit of foot shooting. */
4192                         continue;
4193                 }
4194                 if (dunit < 0)          /* unwired?! */
4195                         continue;
4196                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4197                         if (sim_bus == val) {
4198                                 pathid = dunit;
4199                                 break;
4200                         }
4201                 } else if (sim_bus == 0) {
4202                         /* Unspecified matches bus 0 */
4203                         pathid = dunit;
4204                         break;
4205                 } else {
4206                         printf("Ambiguous scbus configuration for %s%d "
4207                                "bus %d, cannot wire down.  The kernel "
4208                                "config entry for scbus%d should "
4209                                "specify a controller bus.\n"
4210                                "Scbus will be assigned dynamically.\n",
4211                                sim_name, sim_unit, sim_bus, dunit);
4212                         break;
4213                 }
4214         }
4215
4216         if (pathid == CAM_XPT_PATH_ID)
4217                 pathid = xptnextfreepathid();
4218         return (pathid);
4219 }
4220
4221 static const char *
4222 xpt_async_string(u_int32_t async_code)
4223 {
4224
4225         switch (async_code) {
4226         case AC_BUS_RESET: return ("AC_BUS_RESET");
4227         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4228         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4229         case AC_SENT_BDR: return ("AC_SENT_BDR");
4230         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4231         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4232         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4233         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4234         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4235         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4236         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4237         case AC_CONTRACT: return ("AC_CONTRACT");
4238         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4239         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4240         }
4241         return ("AC_UNKNOWN");
4242 }
4243
4244 static int
4245 xpt_async_size(u_int32_t async_code)
4246 {
4247
4248         switch (async_code) {
4249         case AC_BUS_RESET: return (0);
4250         case AC_UNSOL_RESEL: return (0);
4251         case AC_SCSI_AEN: return (0);
4252         case AC_SENT_BDR: return (0);
4253         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4254         case AC_PATH_DEREGISTERED: return (0);
4255         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4256         case AC_LOST_DEVICE: return (0);
4257         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4258         case AC_INQ_CHANGED: return (0);
4259         case AC_GETDEV_CHANGED: return (0);
4260         case AC_CONTRACT: return (sizeof(struct ac_contract));
4261         case AC_ADVINFO_CHANGED: return (-1);
4262         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4263         }
4264         return (0);
4265 }
4266
4267 static int
4268 xpt_async_process_dev(struct cam_ed *device, void *arg)
4269 {
4270         union ccb *ccb = arg;
4271         struct cam_path *path = ccb->ccb_h.path;
4272         void *async_arg = ccb->casync.async_arg_ptr;
4273         u_int32_t async_code = ccb->casync.async_code;
4274         int relock;
4275
4276         if (path->device != device
4277          && path->device->lun_id != CAM_LUN_WILDCARD
4278          && device->lun_id != CAM_LUN_WILDCARD)
4279                 return (1);
4280
4281         /*
4282          * The async callback could free the device.
4283          * If it is a broadcast async, it doesn't hold
4284          * device reference, so take our own reference.
4285          */
4286         xpt_acquire_device(device);
4287
4288         /*
4289          * If async for specific device is to be delivered to
4290          * the wildcard client, take the specific device lock.
4291          * XXX: We may need a way for client to specify it.
4292          */
4293         if ((device->lun_id == CAM_LUN_WILDCARD &&
4294              path->device->lun_id != CAM_LUN_WILDCARD) ||
4295             (device->target->target_id == CAM_TARGET_WILDCARD &&
4296              path->target->target_id != CAM_TARGET_WILDCARD) ||
4297             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4298              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4299                 mtx_unlock(&device->device_mtx);
4300                 xpt_path_lock(path);
4301                 relock = 1;
4302         } else
4303                 relock = 0;
4304
4305         (*(device->target->bus->xport->ops->async))(async_code,
4306             device->target->bus, device->target, device, async_arg);
4307         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4308
4309         if (relock) {
4310                 xpt_path_unlock(path);
4311                 mtx_lock(&device->device_mtx);
4312         }
4313         xpt_release_device(device);
4314         return (1);
4315 }
4316
4317 static int
4318 xpt_async_process_tgt(struct cam_et *target, void *arg)
4319 {
4320         union ccb *ccb = arg;
4321         struct cam_path *path = ccb->ccb_h.path;
4322
4323         if (path->target != target
4324          && path->target->target_id != CAM_TARGET_WILDCARD
4325          && target->target_id != CAM_TARGET_WILDCARD)
4326                 return (1);
4327
4328         if (ccb->casync.async_code == AC_SENT_BDR) {
4329                 /* Update our notion of when the last reset occurred */
4330                 microtime(&target->last_reset);
4331         }
4332
4333         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4334 }
4335
4336 static void
4337 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4338 {
4339         struct cam_eb *bus;
4340         struct cam_path *path;
4341         void *async_arg;
4342         u_int32_t async_code;
4343
4344         path = ccb->ccb_h.path;
4345         async_code = ccb->casync.async_code;
4346         async_arg = ccb->casync.async_arg_ptr;
4347         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4348             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4349         bus = path->bus;
4350
4351         if (async_code == AC_BUS_RESET) {
4352                 /* Update our notion of when the last reset occurred */
4353                 microtime(&bus->last_reset);
4354         }
4355
4356         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4357
4358         /*
4359          * If this wasn't a fully wildcarded async, tell all
4360          * clients that want all async events.
4361          */
4362         if (bus != xpt_periph->path->bus) {
4363                 xpt_path_lock(xpt_periph->path);
4364                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4365                 xpt_path_unlock(xpt_periph->path);
4366         }
4367
4368         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4369                 xpt_release_devq(path, 1, TRUE);
4370         else
4371                 xpt_release_simq(path->bus->sim, TRUE);
4372         if (ccb->casync.async_arg_size > 0)
4373                 free(async_arg, M_CAMXPT);
4374         xpt_free_path(path);
4375         xpt_free_ccb(ccb);
4376 }
4377
4378 static void
4379 xpt_async_bcast(struct async_list *async_head,
4380                 u_int32_t async_code,
4381                 struct cam_path *path, void *async_arg)
4382 {
4383         struct async_node *cur_entry;
4384         struct mtx *mtx;
4385
4386         cur_entry = SLIST_FIRST(async_head);
4387         while (cur_entry != NULL) {
4388                 struct async_node *next_entry;
4389                 /*
4390                  * Grab the next list entry before we call the current
4391                  * entry's callback.  This is because the callback function
4392                  * can delete its async callback entry.
4393                  */
4394                 next_entry = SLIST_NEXT(cur_entry, links);
4395                 if ((cur_entry->event_enable & async_code) != 0) {
4396                         mtx = cur_entry->event_lock ?
4397                             path->device->sim->mtx : NULL;
4398                         if (mtx)
4399                                 mtx_lock(mtx);
4400                         cur_entry->callback(cur_entry->callback_arg,
4401                                             async_code, path,
4402                                             async_arg);
4403                         if (mtx)
4404                                 mtx_unlock(mtx);
4405                 }
4406                 cur_entry = next_entry;
4407         }
4408 }
4409
4410 void
4411 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4412 {
4413         union ccb *ccb;
4414         int size;
4415
4416         ccb = xpt_alloc_ccb_nowait();
4417         if (ccb == NULL) {
4418                 xpt_print(path, "Can't allocate CCB to send %s\n",
4419                     xpt_async_string(async_code));
4420                 return;
4421         }
4422
4423         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4424                 xpt_print(path, "Can't allocate path to send %s\n",
4425                     xpt_async_string(async_code));
4426                 xpt_free_ccb(ccb);
4427                 return;
4428         }
4429         ccb->ccb_h.path->periph = NULL;
4430         ccb->ccb_h.func_code = XPT_ASYNC;
4431         ccb->ccb_h.cbfcnp = xpt_async_process;
4432         ccb->ccb_h.flags |= CAM_UNLOCKED;
4433         ccb->casync.async_code = async_code;
4434         ccb->casync.async_arg_size = 0;
4435         size = xpt_async_size(async_code);
4436         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4437             ("xpt_async: func %#x %s aync_code %d %s\n",
4438                 ccb->ccb_h.func_code,
4439                 xpt_action_name(ccb->ccb_h.func_code),
4440                 async_code,
4441                 xpt_async_string(async_code)));
4442         if (size > 0 && async_arg != NULL) {
4443                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4444                 if (ccb->casync.async_arg_ptr == NULL) {
4445                         xpt_print(path, "Can't allocate argument to send %s\n",
4446                             xpt_async_string(async_code));
4447                         xpt_free_path(ccb->ccb_h.path);
4448                         xpt_free_ccb(ccb);
4449                         return;
4450                 }
4451                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4452                 ccb->casync.async_arg_size = size;
4453         } else if (size < 0) {
4454                 ccb->casync.async_arg_ptr = async_arg;
4455                 ccb->casync.async_arg_size = size;
4456         }
4457         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4458                 xpt_freeze_devq(path, 1);
4459         else
4460                 xpt_freeze_simq(path->bus->sim, 1);
4461         xpt_done(ccb);
4462 }
4463
4464 static void
4465 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4466                       struct cam_et *target, struct cam_ed *device,
4467                       void *async_arg)
4468 {
4469
4470         /*
4471          * We only need to handle events for real devices.
4472          */
4473         if (target->target_id == CAM_TARGET_WILDCARD
4474          || device->lun_id == CAM_LUN_WILDCARD)
4475                 return;
4476
4477         printf("%s called\n", __func__);
4478 }
4479
4480 static uint32_t
4481 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4482 {
4483         struct cam_devq *devq;
4484         uint32_t freeze;
4485
4486         devq = dev->sim->devq;
4487         mtx_assert(&devq->send_mtx, MA_OWNED);
4488         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4489             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4490             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4491         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4492         /* Remove frozen device from sendq. */
4493         if (device_is_queued(dev))
4494                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4495         return (freeze);
4496 }
4497
4498 u_int32_t
4499 xpt_freeze_devq(struct cam_path *path, u_int count)
4500 {
4501         struct cam_ed   *dev = path->device;
4502         struct cam_devq *devq;
4503         uint32_t         freeze;
4504
4505         devq = dev->sim->devq;
4506         mtx_lock(&devq->send_mtx);
4507         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4508         freeze = xpt_freeze_devq_device(dev, count);
4509         mtx_unlock(&devq->send_mtx);
4510         return (freeze);
4511 }
4512
4513 u_int32_t
4514 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4515 {
4516         struct cam_devq *devq;
4517         uint32_t         freeze;
4518
4519         devq = sim->devq;
4520         mtx_lock(&devq->send_mtx);
4521         freeze = (devq->send_queue.qfrozen_cnt += count);
4522         mtx_unlock(&devq->send_mtx);
4523         return (freeze);
4524 }
4525
4526 static void
4527 xpt_release_devq_timeout(void *arg)
4528 {
4529         struct cam_ed *dev;
4530         struct cam_devq *devq;
4531
4532         dev = (struct cam_ed *)arg;
4533         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4534         devq = dev->sim->devq;
4535         mtx_assert(&devq->send_mtx, MA_OWNED);
4536         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4537                 xpt_run_devq(devq);
4538 }
4539
4540 void
4541 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4542 {
4543         struct cam_ed *dev;
4544         struct cam_devq *devq;
4545
4546         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4547             count, run_queue));
4548         dev = path->device;
4549         devq = dev->sim->devq;
4550         mtx_lock(&devq->send_mtx);
4551         if (xpt_release_devq_device(dev, count, run_queue))
4552                 xpt_run_devq(dev->sim->devq);
4553         mtx_unlock(&devq->send_mtx);
4554 }
4555
4556 static int
4557 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4558 {
4559
4560         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4561         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4562             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4563             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4564         if (count > dev->ccbq.queue.qfrozen_cnt) {
4565 #ifdef INVARIANTS
4566                 printf("xpt_release_devq(): requested %u > present %u\n",
4567                     count, dev->ccbq.queue.qfrozen_cnt);
4568 #endif
4569                 count = dev->ccbq.queue.qfrozen_cnt;
4570         }
4571         dev->ccbq.queue.qfrozen_cnt -= count;
4572         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4573                 /*
4574                  * No longer need to wait for a successful
4575                  * command completion.
4576                  */
4577                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4578                 /*
4579                  * Remove any timeouts that might be scheduled
4580                  * to release this queue.
4581                  */
4582                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4583                         callout_stop(&dev->callout);
4584                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4585                 }
4586                 /*
4587                  * Now that we are unfrozen schedule the
4588                  * device so any pending transactions are
4589                  * run.
4590                  */
4591                 xpt_schedule_devq(dev->sim->devq, dev);
4592         } else
4593                 run_queue = 0;
4594         return (run_queue);
4595 }
4596
4597 void
4598 xpt_release_simq(struct cam_sim *sim, int run_queue)
4599 {
4600         struct cam_devq *devq;
4601
4602         devq = sim->devq;
4603         mtx_lock(&devq->send_mtx);
4604         if (devq->send_queue.qfrozen_cnt <= 0) {
4605 #ifdef INVARIANTS
4606                 printf("xpt_release_simq: requested 1 > present %u\n",
4607                     devq->send_queue.qfrozen_cnt);
4608 #endif
4609         } else
4610                 devq->send_queue.qfrozen_cnt--;
4611         if (devq->send_queue.qfrozen_cnt == 0) {
4612                 /*
4613                  * If there is a timeout scheduled to release this
4614                  * sim queue, remove it.  The queue frozen count is
4615                  * already at 0.
4616                  */
4617                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4618                         callout_stop(&sim->callout);
4619                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4620                 }
4621                 if (run_queue) {
4622                         /*
4623                          * Now that we are unfrozen run the send queue.
4624                          */
4625                         xpt_run_devq(sim->devq);
4626                 }
4627         }
4628         mtx_unlock(&devq->send_mtx);
4629 }
4630
4631 /*
4632  * XXX Appears to be unused.
4633  */
4634 static void
4635 xpt_release_simq_timeout(void *arg)
4636 {
4637         struct cam_sim *sim;
4638
4639         sim = (struct cam_sim *)arg;
4640         xpt_release_simq(sim, /* run_queue */ TRUE);
4641 }
4642
4643 void
4644 xpt_done(union ccb *done_ccb)
4645 {
4646         struct cam_doneq *queue;
4647         int     run, hash;
4648
4649 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4650         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4651             done_ccb->csio.bio != NULL)
4652                 biotrack(done_ccb->csio.bio, __func__);
4653 #endif
4654
4655         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4656             ("xpt_done: func= %#x %s status %#x\n",
4657                 done_ccb->ccb_h.func_code,
4658                 xpt_action_name(done_ccb->ccb_h.func_code),
4659                 done_ccb->ccb_h.status));
4660         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4661                 return;
4662
4663         /* Store the time the ccb was in the sim */
4664         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4665         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4666             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4667         queue = &cam_doneqs[hash];
4668         mtx_lock(&queue->cam_doneq_mtx);
4669         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4670         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4671         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4672         mtx_unlock(&queue->cam_doneq_mtx);
4673         if (run)
4674                 wakeup(&queue->cam_doneq);
4675 }
4676
4677 void
4678 xpt_done_direct(union ccb *done_ccb)
4679 {
4680
4681         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4682             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4683         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4684                 return;
4685
4686         /* Store the time the ccb was in the sim */
4687         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4688         xpt_done_process(&done_ccb->ccb_h);
4689 }
4690
4691 union ccb *
4692 xpt_alloc_ccb()
4693 {
4694         union ccb *new_ccb;
4695
4696         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4697         return (new_ccb);
4698 }
4699
4700 union ccb *
4701 xpt_alloc_ccb_nowait()
4702 {
4703         union ccb *new_ccb;
4704
4705         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4706         return (new_ccb);
4707 }
4708
4709 void
4710 xpt_free_ccb(union ccb *free_ccb)
4711 {
4712         free(free_ccb, M_CAMCCB);
4713 }
4714
4715
4716
4717 /* Private XPT functions */
4718
4719 /*
4720  * Get a CAM control block for the caller. Charge the structure to the device
4721  * referenced by the path.  If we don't have sufficient resources to allocate
4722  * more ccbs, we return NULL.
4723  */
4724 static union ccb *
4725 xpt_get_ccb_nowait(struct cam_periph *periph)
4726 {
4727         union ccb *new_ccb;
4728
4729         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4730         if (new_ccb == NULL)
4731                 return (NULL);
4732         periph->periph_allocated++;
4733         cam_ccbq_take_opening(&periph->path->device->ccbq);
4734         return (new_ccb);
4735 }
4736
4737 static union ccb *
4738 xpt_get_ccb(struct cam_periph *periph)
4739 {
4740         union ccb *new_ccb;
4741
4742         cam_periph_unlock(periph);
4743         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4744         cam_periph_lock(periph);
4745         periph->periph_allocated++;
4746         cam_ccbq_take_opening(&periph->path->device->ccbq);
4747         return (new_ccb);
4748 }
4749
4750 union ccb *
4751 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4752 {
4753         struct ccb_hdr *ccb_h;
4754
4755         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4756         cam_periph_assert(periph, MA_OWNED);
4757         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4758             ccb_h->pinfo.priority != priority) {
4759                 if (priority < periph->immediate_priority) {
4760                         periph->immediate_priority = priority;
4761                         xpt_run_allocq(periph, 0);
4762                 } else
4763                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4764                             "cgticb", 0);
4765         }
4766         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4767         return ((union ccb *)ccb_h);
4768 }
4769
4770 static void
4771 xpt_acquire_bus(struct cam_eb *bus)
4772 {
4773
4774         xpt_lock_buses();
4775         bus->refcount++;
4776         xpt_unlock_buses();
4777 }
4778
4779 static void
4780 xpt_release_bus(struct cam_eb *bus)
4781 {
4782
4783         xpt_lock_buses();
4784         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4785         if (--bus->refcount > 0) {
4786                 xpt_unlock_buses();
4787                 return;
4788         }
4789         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4790         xsoftc.bus_generation++;
4791         xpt_unlock_buses();
4792         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4793             ("destroying bus, but target list is not empty"));
4794         cam_sim_release(bus->sim);
4795         mtx_destroy(&bus->eb_mtx);
4796         free(bus, M_CAMXPT);
4797 }
4798
4799 static struct cam_et *
4800 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4801 {
4802         struct cam_et *cur_target, *target;
4803
4804         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4805         mtx_assert(&bus->eb_mtx, MA_OWNED);
4806         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4807                                          M_NOWAIT|M_ZERO);
4808         if (target == NULL)
4809                 return (NULL);
4810
4811         TAILQ_INIT(&target->ed_entries);
4812         target->bus = bus;
4813         target->target_id = target_id;
4814         target->refcount = 1;
4815         target->generation = 0;
4816         target->luns = NULL;
4817         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4818         timevalclear(&target->last_reset);
4819         /*
4820          * Hold a reference to our parent bus so it
4821          * will not go away before we do.
4822          */
4823         bus->refcount++;
4824
4825         /* Insertion sort into our bus's target list */
4826         cur_target = TAILQ_FIRST(&bus->et_entries);
4827         while (cur_target != NULL && cur_target->target_id < target_id)
4828                 cur_target = TAILQ_NEXT(cur_target, links);
4829         if (cur_target != NULL) {
4830                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4831         } else {
4832                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4833         }
4834         bus->generation++;
4835         return (target);
4836 }
4837
4838 static void
4839 xpt_acquire_target(struct cam_et *target)
4840 {
4841         struct cam_eb *bus = target->bus;
4842
4843         mtx_lock(&bus->eb_mtx);
4844         target->refcount++;
4845         mtx_unlock(&bus->eb_mtx);
4846 }
4847
4848 static void
4849 xpt_release_target(struct cam_et *target)
4850 {
4851         struct cam_eb *bus = target->bus;
4852
4853         mtx_lock(&bus->eb_mtx);
4854         if (--target->refcount > 0) {
4855                 mtx_unlock(&bus->eb_mtx);
4856                 return;
4857         }
4858         TAILQ_REMOVE(&bus->et_entries, target, links);
4859         bus->generation++;
4860         mtx_unlock(&bus->eb_mtx);
4861         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4862             ("destroying target, but device list is not empty"));
4863         xpt_release_bus(bus);
4864         mtx_destroy(&target->luns_mtx);
4865         if (target->luns)
4866                 free(target->luns, M_CAMXPT);
4867         free(target, M_CAMXPT);
4868 }
4869
4870 static struct cam_ed *
4871 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4872                          lun_id_t lun_id)
4873 {
4874         struct cam_ed *device;
4875
4876         device = xpt_alloc_device(bus, target, lun_id);
4877         if (device == NULL)
4878                 return (NULL);
4879
4880         device->mintags = 1;
4881         device->maxtags = 1;
4882         return (device);
4883 }
4884
4885 static void
4886 xpt_destroy_device(void *context, int pending)
4887 {
4888         struct cam_ed   *device = context;
4889
4890         mtx_lock(&device->device_mtx);
4891         mtx_destroy(&device->device_mtx);
4892         free(device, M_CAMDEV);
4893 }
4894
4895 struct cam_ed *
4896 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4897 {
4898         struct cam_ed   *cur_device, *device;
4899         struct cam_devq *devq;
4900         cam_status status;
4901
4902         mtx_assert(&bus->eb_mtx, MA_OWNED);
4903         /* Make space for us in the device queue on our bus */
4904         devq = bus->sim->devq;
4905         mtx_lock(&devq->send_mtx);
4906         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4907         mtx_unlock(&devq->send_mtx);
4908         if (status != CAM_REQ_CMP)
4909                 return (NULL);
4910
4911         device = (struct cam_ed *)malloc(sizeof(*device),
4912                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4913         if (device == NULL)
4914                 return (NULL);
4915
4916         cam_init_pinfo(&device->devq_entry);
4917         device->target = target;
4918         device->lun_id = lun_id;
4919         device->sim = bus->sim;
4920         if (cam_ccbq_init(&device->ccbq,
4921                           bus->sim->max_dev_openings) != 0) {
4922                 free(device, M_CAMDEV);
4923                 return (NULL);
4924         }
4925         SLIST_INIT(&device->asyncs);
4926         SLIST_INIT(&device->periphs);
4927         device->generation = 0;
4928         device->flags = CAM_DEV_UNCONFIGURED;
4929         device->tag_delay_count = 0;
4930         device->tag_saved_openings = 0;
4931         device->refcount = 1;
4932         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4933         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4934         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4935         /*
4936          * Hold a reference to our parent bus so it
4937          * will not go away before we do.
4938          */
4939         target->refcount++;
4940
4941         cur_device = TAILQ_FIRST(&target->ed_entries);
4942         while (cur_device != NULL && cur_device->lun_id < lun_id)
4943                 cur_device = TAILQ_NEXT(cur_device, links);
4944         if (cur_device != NULL)
4945                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4946         else
4947                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4948         target->generation++;
4949         return (device);
4950 }
4951
4952 void
4953 xpt_acquire_device(struct cam_ed *device)
4954 {
4955         struct cam_eb *bus = device->target->bus;
4956
4957         mtx_lock(&bus->eb_mtx);
4958         device->refcount++;
4959         mtx_unlock(&bus->eb_mtx);
4960 }
4961
4962 void
4963 xpt_release_device(struct cam_ed *device)
4964 {
4965         struct cam_eb *bus = device->target->bus;
4966         struct cam_devq *devq;
4967
4968         mtx_lock(&bus->eb_mtx);
4969         if (--device->refcount > 0) {
4970                 mtx_unlock(&bus->eb_mtx);
4971                 return;
4972         }
4973
4974         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4975         device->target->generation++;
4976         mtx_unlock(&bus->eb_mtx);
4977
4978         /* Release our slot in the devq */
4979         devq = bus->sim->devq;
4980         mtx_lock(&devq->send_mtx);
4981         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4982         mtx_unlock(&devq->send_mtx);
4983
4984         KASSERT(SLIST_EMPTY(&device->periphs),
4985             ("destroying device, but periphs list is not empty"));
4986         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4987             ("destroying device while still queued for ccbs"));
4988
4989         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4990                 callout_stop(&device->callout);
4991
4992         xpt_release_target(device->target);
4993
4994         cam_ccbq_fini(&device->ccbq);
4995         /*
4996          * Free allocated memory.  free(9) does nothing if the
4997          * supplied pointer is NULL, so it is safe to call without
4998          * checking.
4999          */
5000         free(device->supported_vpds, M_CAMXPT);
5001         free(device->device_id, M_CAMXPT);
5002         free(device->ext_inq, M_CAMXPT);
5003         free(device->physpath, M_CAMXPT);
5004         free(device->rcap_buf, M_CAMXPT);
5005         free(device->serial_num, M_CAMXPT);
5006         free(device->nvme_data, M_CAMXPT);
5007         free(device->nvme_cdata, M_CAMXPT);
5008         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5009 }
5010
5011 u_int32_t
5012 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5013 {
5014         int     result;
5015         struct  cam_ed *dev;
5016
5017         dev = path->device;
5018         mtx_lock(&dev->sim->devq->send_mtx);
5019         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5020         mtx_unlock(&dev->sim->devq->send_mtx);
5021         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5022          || (dev->inq_flags & SID_CmdQue) != 0)
5023                 dev->tag_saved_openings = newopenings;
5024         return (result);
5025 }
5026
5027 static struct cam_eb *
5028 xpt_find_bus(path_id_t path_id)
5029 {
5030         struct cam_eb *bus;
5031
5032         xpt_lock_buses();
5033         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5034              bus != NULL;
5035              bus = TAILQ_NEXT(bus, links)) {
5036                 if (bus->path_id == path_id) {
5037                         bus->refcount++;
5038                         break;
5039                 }
5040         }
5041         xpt_unlock_buses();
5042         return (bus);
5043 }
5044
5045 static struct cam_et *
5046 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5047 {
5048         struct cam_et *target;
5049
5050         mtx_assert(&bus->eb_mtx, MA_OWNED);
5051         for (target = TAILQ_FIRST(&bus->et_entries);
5052              target != NULL;
5053              target = TAILQ_NEXT(target, links)) {
5054                 if (target->target_id == target_id) {
5055                         target->refcount++;
5056                         break;
5057                 }
5058         }
5059         return (target);
5060 }
5061
5062 static struct cam_ed *
5063 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5064 {
5065         struct cam_ed *device;
5066
5067         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5068         for (device = TAILQ_FIRST(&target->ed_entries);
5069              device != NULL;
5070              device = TAILQ_NEXT(device, links)) {
5071                 if (device->lun_id == lun_id) {
5072                         device->refcount++;
5073                         break;
5074                 }
5075         }
5076         return (device);
5077 }
5078
5079 void
5080 xpt_start_tags(struct cam_path *path)
5081 {
5082         struct ccb_relsim crs;
5083         struct cam_ed *device;
5084         struct cam_sim *sim;
5085         int    newopenings;
5086
5087         device = path->device;
5088         sim = path->bus->sim;
5089         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5090         xpt_freeze_devq(path, /*count*/1);
5091         device->inq_flags |= SID_CmdQue;
5092         if (device->tag_saved_openings != 0)
5093                 newopenings = device->tag_saved_openings;
5094         else
5095                 newopenings = min(device->maxtags,
5096                                   sim->max_tagged_dev_openings);
5097         xpt_dev_ccbq_resize(path, newopenings);
5098         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5099         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5100         crs.ccb_h.func_code = XPT_REL_SIMQ;
5101         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5102         crs.openings
5103             = crs.release_timeout
5104             = crs.qfrozen_cnt
5105             = 0;
5106         xpt_action((union ccb *)&crs);
5107 }
5108
5109 void
5110 xpt_stop_tags(struct cam_path *path)
5111 {
5112         struct ccb_relsim crs;
5113         struct cam_ed *device;
5114         struct cam_sim *sim;
5115
5116         device = path->device;
5117         sim = path->bus->sim;
5118         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5119         device->tag_delay_count = 0;
5120         xpt_freeze_devq(path, /*count*/1);
5121         device->inq_flags &= ~SID_CmdQue;
5122         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5123         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5124         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5125         crs.ccb_h.func_code = XPT_REL_SIMQ;
5126         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5127         crs.openings
5128             = crs.release_timeout
5129             = crs.qfrozen_cnt
5130             = 0;
5131         xpt_action((union ccb *)&crs);
5132 }
5133
5134 static void
5135 xpt_boot_delay(void *arg)
5136 {
5137
5138         xpt_release_boot();
5139 }
5140
5141 static void
5142 xpt_config(void *arg)
5143 {
5144         /*
5145          * Now that interrupts are enabled, go find our devices
5146          */
5147         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5148                 printf("xpt_config: failed to create taskqueue thread.\n");
5149
5150         /* Setup debugging path */
5151         if (cam_dflags != CAM_DEBUG_NONE) {
5152                 if (xpt_create_path(&cam_dpath, NULL,
5153                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5154                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5155                         printf("xpt_config: xpt_create_path() failed for debug"
5156                                " target %d:%d:%d, debugging disabled\n",
5157                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5158                         cam_dflags = CAM_DEBUG_NONE;
5159                 }
5160         } else
5161                 cam_dpath = NULL;
5162
5163         periphdriver_init(1);
5164         xpt_hold_boot();
5165         callout_init(&xsoftc.boot_callout, 1);
5166         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5167             xpt_boot_delay, NULL, 0);
5168         /* Fire up rescan thread. */
5169         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5170             "cam", "scanner")) {
5171                 printf("xpt_config: failed to create rescan thread.\n");
5172         }
5173 }
5174
5175 void
5176 xpt_hold_boot(void)
5177 {
5178         xpt_lock_buses();
5179         xsoftc.buses_to_config++;
5180         xpt_unlock_buses();
5181 }
5182
5183 void
5184 xpt_release_boot(void)
5185 {
5186         xpt_lock_buses();
5187         xsoftc.buses_to_config--;
5188         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5189                 struct  xpt_task *task;
5190
5191                 xsoftc.buses_config_done = 1;
5192                 xpt_unlock_buses();
5193                 /* Call manually because we don't have any buses */
5194                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5195                 if (task != NULL) {
5196                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5197                         taskqueue_enqueue(taskqueue_thread, &task->task);
5198                 }
5199         } else
5200                 xpt_unlock_buses();
5201 }
5202
5203 /*
5204  * If the given device only has one peripheral attached to it, and if that
5205  * peripheral is the passthrough driver, announce it.  This insures that the
5206  * user sees some sort of announcement for every peripheral in their system.
5207  */
5208 static int
5209 xptpassannouncefunc(struct cam_ed *device, void *arg)
5210 {
5211         struct cam_periph *periph;
5212         int i;
5213
5214         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5215              periph = SLIST_NEXT(periph, periph_links), i++);
5216
5217         periph = SLIST_FIRST(&device->periphs);
5218         if ((i == 1)
5219          && (strncmp(periph->periph_name, "pass", 4) == 0))
5220                 xpt_announce_periph(periph, NULL);
5221
5222         return(1);
5223 }
5224
5225 static void
5226 xpt_finishconfig_task(void *context, int pending)
5227 {
5228
5229         periphdriver_init(2);
5230         /*
5231          * Check for devices with no "standard" peripheral driver
5232          * attached.  For any devices like that, announce the
5233          * passthrough driver so the user will see something.
5234          */
5235         if (!bootverbose)
5236                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5237
5238         /* Release our hook so that the boot can continue. */
5239         config_intrhook_disestablish(&xsoftc.xpt_config_hook);
5240
5241         free(context, M_CAMXPT);
5242 }
5243
5244 cam_status
5245 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5246                    struct cam_path *path)
5247 {
5248         struct ccb_setasync csa;
5249         cam_status status;
5250         int xptpath = 0;
5251
5252         if (path == NULL) {
5253                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5254                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5255                 if (status != CAM_REQ_CMP)
5256                         return (status);
5257                 xpt_path_lock(path);
5258                 xptpath = 1;
5259         }
5260
5261         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5262         csa.ccb_h.func_code = XPT_SASYNC_CB;
5263         csa.event_enable = event;
5264         csa.callback = cbfunc;
5265         csa.callback_arg = cbarg;
5266         xpt_action((union ccb *)&csa);
5267         status = csa.ccb_h.status;
5268
5269         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5270             ("xpt_register_async: func %p\n", cbfunc));
5271
5272         if (xptpath) {
5273                 xpt_path_unlock(path);
5274                 xpt_free_path(path);
5275         }
5276
5277         if ((status == CAM_REQ_CMP) &&
5278             (csa.event_enable & AC_FOUND_DEVICE)) {
5279                 /*
5280                  * Get this peripheral up to date with all
5281                  * the currently existing devices.
5282                  */
5283                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5284         }
5285         if ((status == CAM_REQ_CMP) &&
5286             (csa.event_enable & AC_PATH_REGISTERED)) {
5287                 /*
5288                  * Get this peripheral up to date with all
5289                  * the currently existing buses.
5290                  */
5291                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5292         }
5293
5294         return (status);
5295 }
5296
5297 static void
5298 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5299 {
5300         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5301
5302         switch (work_ccb->ccb_h.func_code) {
5303         /* Common cases first */
5304         case XPT_PATH_INQ:              /* Path routing inquiry */
5305         {
5306                 struct ccb_pathinq *cpi;
5307
5308                 cpi = &work_ccb->cpi;
5309                 cpi->version_num = 1; /* XXX??? */
5310                 cpi->hba_inquiry = 0;
5311                 cpi->target_sprt = 0;
5312                 cpi->hba_misc = 0;
5313                 cpi->hba_eng_cnt = 0;
5314                 cpi->max_target = 0;
5315                 cpi->max_lun = 0;
5316                 cpi->initiator_id = 0;
5317                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5318                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5319                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5320                 cpi->unit_number = sim->unit_number;
5321                 cpi->bus_id = sim->bus_id;
5322                 cpi->base_transfer_speed = 0;
5323                 cpi->protocol = PROTO_UNSPECIFIED;
5324                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5325                 cpi->transport = XPORT_UNSPECIFIED;
5326                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5327                 cpi->ccb_h.status = CAM_REQ_CMP;
5328                 xpt_done(work_ccb);
5329                 break;
5330         }
5331         default:
5332                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5333                 xpt_done(work_ccb);
5334                 break;
5335         }
5336 }
5337
5338 /*
5339  * The xpt as a "controller" has no interrupt sources, so polling
5340  * is a no-op.
5341  */
5342 static void
5343 xptpoll(struct cam_sim *sim)
5344 {
5345 }
5346
5347 void
5348 xpt_lock_buses(void)
5349 {
5350         mtx_lock(&xsoftc.xpt_topo_lock);
5351 }
5352
5353 void
5354 xpt_unlock_buses(void)
5355 {
5356         mtx_unlock(&xsoftc.xpt_topo_lock);
5357 }
5358
5359 struct mtx *
5360 xpt_path_mtx(struct cam_path *path)
5361 {
5362
5363         return (&path->device->device_mtx);
5364 }
5365
5366 static void
5367 xpt_done_process(struct ccb_hdr *ccb_h)
5368 {
5369         struct cam_sim *sim = NULL;
5370         struct cam_devq *devq = NULL;
5371         struct mtx *mtx = NULL;
5372
5373 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5374         struct ccb_scsiio *csio;
5375
5376         if (ccb_h->func_code == XPT_SCSI_IO) {
5377                 csio = &((union ccb *)ccb_h)->csio;
5378                 if (csio->bio != NULL)
5379                         biotrack(csio->bio, __func__);
5380         }
5381 #endif
5382
5383         if (ccb_h->flags & CAM_HIGH_POWER) {
5384                 struct highpowerlist    *hphead;
5385                 struct cam_ed           *device;
5386
5387                 mtx_lock(&xsoftc.xpt_highpower_lock);
5388                 hphead = &xsoftc.highpowerq;
5389
5390                 device = STAILQ_FIRST(hphead);
5391
5392                 /*
5393                  * Increment the count since this command is done.
5394                  */
5395                 xsoftc.num_highpower++;
5396
5397                 /*
5398                  * Any high powered commands queued up?
5399                  */
5400                 if (device != NULL) {
5401
5402                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5403                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5404
5405                         mtx_lock(&device->sim->devq->send_mtx);
5406                         xpt_release_devq_device(device,
5407                                          /*count*/1, /*runqueue*/TRUE);
5408                         mtx_unlock(&device->sim->devq->send_mtx);
5409                 } else
5410                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5411         }
5412
5413         /*
5414          * Insulate against a race where the periph is destroyed but CCBs are
5415          * still not all processed. This shouldn't happen, but allows us better
5416          * bug diagnostic when it does.
5417          */
5418         if (ccb_h->path->bus)
5419                 sim = ccb_h->path->bus->sim;
5420
5421         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5422                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5423                 xpt_release_simq(sim, /*run_queue*/FALSE);
5424                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5425         }
5426
5427         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5428          && (ccb_h->status & CAM_DEV_QFRZN)) {
5429                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5430                 ccb_h->status &= ~CAM_DEV_QFRZN;
5431         }
5432
5433         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5434                 struct cam_ed *dev = ccb_h->path->device;
5435
5436                 if (sim)
5437                         devq = sim->devq;
5438                 KASSERT(devq, ("Periph disappeared with request pending."));
5439
5440                 mtx_lock(&devq->send_mtx);
5441                 devq->send_active--;
5442                 devq->send_openings++;
5443                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5444
5445                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5446                   && (dev->ccbq.dev_active == 0))) {
5447                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5448                         xpt_release_devq_device(dev, /*count*/1,
5449                                          /*run_queue*/FALSE);
5450                 }
5451
5452                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5453                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5454                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5455                         xpt_release_devq_device(dev, /*count*/1,
5456                                          /*run_queue*/FALSE);
5457                 }
5458
5459                 if (!device_is_queued(dev))
5460                         (void)xpt_schedule_devq(devq, dev);
5461                 xpt_run_devq(devq);
5462                 mtx_unlock(&devq->send_mtx);
5463
5464                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5465                         mtx = xpt_path_mtx(ccb_h->path);
5466                         mtx_lock(mtx);
5467
5468                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5469                          && (--dev->tag_delay_count == 0))
5470                                 xpt_start_tags(ccb_h->path);
5471                 }
5472         }
5473
5474         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5475                 if (mtx == NULL) {
5476                         mtx = xpt_path_mtx(ccb_h->path);
5477                         mtx_lock(mtx);
5478                 }
5479         } else {
5480                 if (mtx != NULL) {
5481                         mtx_unlock(mtx);
5482                         mtx = NULL;
5483                 }
5484         }
5485
5486         /* Call the peripheral driver's callback */
5487         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5488         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5489         if (mtx != NULL)
5490                 mtx_unlock(mtx);
5491 }
5492
5493 void
5494 xpt_done_td(void *arg)
5495 {
5496         struct cam_doneq *queue = arg;
5497         struct ccb_hdr *ccb_h;
5498         STAILQ_HEAD(, ccb_hdr)  doneq;
5499
5500         STAILQ_INIT(&doneq);
5501         mtx_lock(&queue->cam_doneq_mtx);
5502         while (1) {
5503                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5504                         queue->cam_doneq_sleep = 1;
5505                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5506                             PRIBIO, "-", 0);
5507                         queue->cam_doneq_sleep = 0;
5508                 }
5509                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5510                 mtx_unlock(&queue->cam_doneq_mtx);
5511
5512                 THREAD_NO_SLEEPING();
5513                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5514                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5515                         xpt_done_process(ccb_h);
5516                 }
5517                 THREAD_SLEEPING_OK();
5518
5519                 mtx_lock(&queue->cam_doneq_mtx);
5520         }
5521 }
5522
5523 static void
5524 camisr_runqueue(void)
5525 {
5526         struct  ccb_hdr *ccb_h;
5527         struct cam_doneq *queue;
5528         int i;
5529
5530         /* Process global queues. */
5531         for (i = 0; i < cam_num_doneqs; i++) {
5532                 queue = &cam_doneqs[i];
5533                 mtx_lock(&queue->cam_doneq_mtx);
5534                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5535                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5536                         mtx_unlock(&queue->cam_doneq_mtx);
5537                         xpt_done_process(ccb_h);
5538                         mtx_lock(&queue->cam_doneq_mtx);
5539                 }
5540                 mtx_unlock(&queue->cam_doneq_mtx);
5541         }
5542 }
5543
5544 struct kv
5545 {
5546         uint32_t v;
5547         const char *name;
5548 };
5549
5550 static struct kv map[] = {
5551         { XPT_NOOP, "XPT_NOOP" },
5552         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5553         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5554         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5555         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5556         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5557         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5558         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5559         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5560         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5561         { XPT_DEBUG, "XPT_DEBUG" },
5562         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5563         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5564         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5565         { XPT_ASYNC, "XPT_ASYNC" },
5566         { XPT_ABORT, "XPT_ABORT" },
5567         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5568         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5569         { XPT_TERM_IO, "XPT_TERM_IO" },
5570         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5571         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5572         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5573         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5574         { XPT_ATA_IO, "XPT_ATA_IO" },
5575         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5576         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5577         { XPT_NVME_IO, "XPT_NVME_IO" },
5578         { XPT_MMC_IO, "XPT_MMC_IO" },
5579         { XPT_SMP_IO, "XPT_SMP_IO" },
5580         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5581         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5582         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5583         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5584         { XPT_EN_LUN, "XPT_EN_LUN" },
5585         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5586         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5587         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5588         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5589         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5590         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5591         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5592         { 0, 0 }
5593 };
5594
5595 const char *
5596 xpt_action_name(uint32_t action)
5597 {
5598         static char buffer[32]; /* Only for unknown messages -- racy */
5599         struct kv *walker = map;
5600
5601         while (walker->name != NULL) {
5602                 if (walker->v == action)
5603                         return (walker->name);
5604                 walker++;
5605         }
5606
5607         snprintf(buffer, sizeof(buffer), "%#x", action);
5608         return (buffer);
5609 }