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 struct xpt_softc {
 103         uint32_t                xpt_generation;
 104
 105         /* number of high powered commands that can go through right now */
 106         struct mtx              xpt_highpower_lock;
 107         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 108         int                     num_highpower;
 109
 110         /* queue for handling async rescan requests. */
 111         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 112         int buses_to_config;
 113         int buses_config_done;
 114         int announce_nosbuf;
 115
 116         /*
 117          * Registered buses
 118          *
 119          * N.B., "busses" is an archaic spelling of "buses".  In new code
 120          * "buses" is preferred.
 121          */
 122         TAILQ_HEAD(,cam_eb)     xpt_busses;
 123         u_int                   bus_generation;
 124
 125         int                     boot_delay;
 126         struct callout          boot_callout;
 127         struct task             boot_task;
 128         struct root_hold_token  xpt_rootmount;
 129
 130         struct mtx              xpt_topo_lock;
 131         struct taskqueue        *xpt_taskq;
 132 };
 133
 134 typedef enum {
 135         DM_RET_COPY             = 0x01,
 136         DM_RET_FLAG_MASK        = 0x0f,
 137         DM_RET_NONE             = 0x00,
 138         DM_RET_STOP             = 0x10,
 139         DM_RET_DESCEND          = 0x20,
 140         DM_RET_ERROR            = 0x30,
 141         DM_RET_ACTION_MASK      = 0xf0
 142 } dev_match_ret;
 143
 144 typedef enum {
 145         XPT_DEPTH_BUS,
 146         XPT_DEPTH_TARGET,
 147         XPT_DEPTH_DEVICE,
 148         XPT_DEPTH_PERIPH
 149 } xpt_traverse_depth;
 150
 151 struct xpt_traverse_config {
 152         xpt_traverse_depth      depth;
 153         void                    *tr_func;
 154         void                    *tr_arg;
 155 };
 156
 157 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 158 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 159 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 160 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 161 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 162
 163 /* Transport layer configuration information */
 164 static struct xpt_softc xsoftc;
 165
 166 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 167
 168 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 169            &xsoftc.boot_delay, 0, "Bus registration wait time");
 170 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 171             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 172 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 173             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 174
 175 struct cam_doneq {
 176         struct mtx_padalign     cam_doneq_mtx;
 177         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 178         int                     cam_doneq_sleep;
 179 };
 180
 181 static struct cam_doneq cam_doneqs[MAXCPU];
 182 static u_int __read_mostly cam_num_doneqs;
 183 static struct proc *cam_proc;
 184
 185 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 186            &cam_num_doneqs, 0, "Number of completion queues/threads");
 187
 188 struct cam_periph *xpt_periph;
 189
 190 static periph_init_t xpt_periph_init;
 191
 192 static struct periph_driver xpt_driver =
 193 {
 194         xpt_periph_init, "xpt",
 195         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 196         CAM_PERIPH_DRV_EARLY
 197 };
 198
 199 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 200
 201 static d_open_t xptopen;
 202 static d_close_t xptclose;
 203 static d_ioctl_t xptioctl;
 204 static d_ioctl_t xptdoioctl;
 205
 206 static struct cdevsw xpt_cdevsw = {
 207         .d_version =    D_VERSION,
 208         .d_flags =      0,
 209         .d_open =       xptopen,
 210         .d_close =      xptclose,
 211         .d_ioctl =      xptioctl,
 212         .d_name =       "xpt",
 213 };
 214
 215 /* Storage for debugging datastructures */
 216 struct cam_path *cam_dpath;
 217 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
 218 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 219         &cam_dflags, 0, "Enabled debug flags");
 220 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 221 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 222         &cam_debug_delay, 0, "Delay in us after each debug message");
 223
 224 /* Our boot-time initialization hook */
 225 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 226
 227 static moduledata_t cam_moduledata = {
 228         "cam",
 229         cam_module_event_handler,
 230         NULL
 231 };
 232
 233 static int      xpt_init(void *);
 234
 235 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 236 MODULE_VERSION(cam, 1);
 237
 238
 239 static void             xpt_async_bcast(struct async_list *async_head,
 240                                         u_int32_t async_code,
 241                                         struct cam_path *path,
 242                                         void *async_arg);
 243 static path_id_t xptnextfreepathid(void);
 244 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 245 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 246 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 247 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 248 static void      xpt_run_allocq_task(void *context, int pending);
 249 static void      xpt_run_devq(struct cam_devq *devq);
 250 static timeout_t xpt_release_devq_timeout;
 251 static void      xpt_release_simq_timeout(void *arg) __unused;
 252 static void      xpt_acquire_bus(struct cam_eb *bus);
 253 static void      xpt_release_bus(struct cam_eb *bus);
 254 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 255 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 256                     int run_queue);
 257 static struct cam_et*
 258                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 259 static void      xpt_acquire_target(struct cam_et *target);
 260 static void      xpt_release_target(struct cam_et *target);
 261 static struct cam_eb*
 262                  xpt_find_bus(path_id_t path_id);
 263 static struct cam_et*
 264                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 265 static struct cam_ed*
 266                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 267 static void      xpt_config(void *arg);
 268 static void      xpt_hold_boot_locked(void);
 269 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 270                                  u_int32_t new_priority);
 271 static xpt_devicefunc_t xptpassannouncefunc;
 272 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 273 static void      xptpoll(struct cam_sim *sim);
 274 static void      camisr_runqueue(void);
 275 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 276 static void      xpt_done_td(void *);
 277 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 278                                     u_int num_patterns, struct cam_eb *bus);
 279 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 280                                        u_int num_patterns,
 281                                        struct cam_ed *device);
 282 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 283                                        u_int num_patterns,
 284                                        struct cam_periph *periph);
 285 static xpt_busfunc_t    xptedtbusfunc;
 286 static xpt_targetfunc_t xptedttargetfunc;
 287 static xpt_devicefunc_t xptedtdevicefunc;
 288 static xpt_periphfunc_t xptedtperiphfunc;
 289 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 290 static xpt_periphfunc_t xptplistperiphfunc;
 291 static int              xptedtmatch(struct ccb_dev_match *cdm);
 292 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 293 static int              xptbustraverse(struct cam_eb *start_bus,
 294                                        xpt_busfunc_t *tr_func, void *arg);
 295 static int              xpttargettraverse(struct cam_eb *bus,
 296                                           struct cam_et *start_target,
 297                                           xpt_targetfunc_t *tr_func, void *arg);
 298 static int              xptdevicetraverse(struct cam_et *target,
 299                                           struct cam_ed *start_device,
 300                                           xpt_devicefunc_t *tr_func, void *arg);
 301 static int              xptperiphtraverse(struct cam_ed *device,
 302                                           struct cam_periph *start_periph,
 303                                           xpt_periphfunc_t *tr_func, void *arg);
 304 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 305                                         xpt_pdrvfunc_t *tr_func, void *arg);
 306 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 307                                             struct cam_periph *start_periph,
 308                                             xpt_periphfunc_t *tr_func,
 309                                             void *arg);
 310 static xpt_busfunc_t    xptdefbusfunc;
 311 static xpt_targetfunc_t xptdeftargetfunc;
 312 static xpt_devicefunc_t xptdefdevicefunc;
 313 static xpt_periphfunc_t xptdefperiphfunc;
 314 static void             xpt_finishconfig_task(void *context, int pending);
 315 static void             xpt_dev_async_default(u_int32_t async_code,
 316                                               struct cam_eb *bus,
 317                                               struct cam_et *target,
 318                                               struct cam_ed *device,
 319                                               void *async_arg);
 320 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 321                                                  struct cam_et *target,
 322                                                  lun_id_t lun_id);
 323 static xpt_devicefunc_t xptsetasyncfunc;
 324 static xpt_busfunc_t    xptsetasyncbusfunc;
 325 static cam_status       xptregister(struct cam_periph *periph,
 326                                     void *arg);
 327 static __inline int device_is_queued(struct cam_ed *device);
 328
 329 static __inline int
 330 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 331 {
 332         int     retval;
 333
 334         mtx_assert(&devq->send_mtx, MA_OWNED);
 335         if ((dev->ccbq.queue.entries > 0) &&
 336             (dev->ccbq.dev_openings > 0) &&
 337             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 338                 /*
 339                  * The priority of a device waiting for controller
 340                  * resources is that of the highest priority CCB
 341                  * enqueued.
 342                  */
 343                 retval =
 344                     xpt_schedule_dev(&devq->send_queue,
 345                                      &dev->devq_entry,
 346                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 347         } else {
 348                 retval = 0;
 349         }
 350         return (retval);
 351 }
 352
 353 static __inline int
 354 device_is_queued(struct cam_ed *device)
 355 {
 356         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 357 }
 358
 359 static void
 360 xpt_periph_init()
 361 {
 362         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 363 }
 364
 365 static int
 366 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 367 {
 368
 369         /*
 370          * Only allow read-write access.
 371          */
 372         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 373                 return(EPERM);
 374
 375         /*
 376          * We don't allow nonblocking access.
 377          */
 378         if ((flags & O_NONBLOCK) != 0) {
 379                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 380                 return(ENODEV);
 381         }
 382
 383         return(0);
 384 }
 385
 386 static int
 387 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 388 {
 389
 390         return(0);
 391 }
 392
 393 /*
 394  * Don't automatically grab the xpt softc lock here even though this is going
 395  * through the xpt device.  The xpt device is really just a back door for
 396  * accessing other devices and SIMs, so the right thing to do is to grab
 397  * the appropriate SIM lock once the bus/SIM is located.
 398  */
 399 static int
 400 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 401 {
 402         int error;
 403
 404         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 405                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 406         }
 407         return (error);
 408 }
 409
 410 static int
 411 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 412 {
 413         int error;
 414
 415         error = 0;
 416
 417         switch(cmd) {
 418         /*
 419          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 420          * to accept CCB types that don't quite make sense to send through a
 421          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 422          * in the CAM spec.
 423          */
 424         case CAMIOCOMMAND: {
 425                 union ccb *ccb;
 426                 union ccb *inccb;
 427                 struct cam_eb *bus;
 428
 429                 inccb = (union ccb *)addr;
 430 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 431                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 432                         inccb->csio.bio = NULL;
 433 #endif
 434
 435                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 436                         return (EINVAL);
 437
 438                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 439                 if (bus == NULL)
 440                         return (EINVAL);
 441
 442                 switch (inccb->ccb_h.func_code) {
 443                 case XPT_SCAN_BUS:
 444                 case XPT_RESET_BUS:
 445                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 446                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 447                                 xpt_release_bus(bus);
 448                                 return (EINVAL);
 449                         }
 450                         break;
 451                 case XPT_SCAN_TGT:
 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                 default:
 459                         break;
 460                 }
 461
 462                 switch(inccb->ccb_h.func_code) {
 463                 case XPT_SCAN_BUS:
 464                 case XPT_RESET_BUS:
 465                 case XPT_PATH_INQ:
 466                 case XPT_ENG_INQ:
 467                 case XPT_SCAN_LUN:
 468                 case XPT_SCAN_TGT:
 469
 470                         ccb = xpt_alloc_ccb();
 471
 472                         /*
 473                          * Create a path using the bus, target, and lun the
 474                          * user passed in.
 475                          */
 476                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 477                                             inccb->ccb_h.path_id,
 478                                             inccb->ccb_h.target_id,
 479                                             inccb->ccb_h.target_lun) !=
 480                                             CAM_REQ_CMP){
 481                                 error = EINVAL;
 482                                 xpt_free_ccb(ccb);
 483                                 break;
 484                         }
 485                         /* Ensure all of our fields are correct */
 486                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 487                                       inccb->ccb_h.pinfo.priority);
 488                         xpt_merge_ccb(ccb, inccb);
 489                         xpt_path_lock(ccb->ccb_h.path);
 490                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 491                         xpt_path_unlock(ccb->ccb_h.path);
 492                         bcopy(ccb, inccb, sizeof(union ccb));
 493                         xpt_free_path(ccb->ccb_h.path);
 494                         xpt_free_ccb(ccb);
 495                         break;
 496
 497                 case XPT_DEBUG: {
 498                         union ccb ccb;
 499
 500                         /*
 501                          * This is an immediate CCB, so it's okay to
 502                          * allocate it on the stack.
 503                          */
 504
 505                         /*
 506                          * Create a path using the bus, target, and lun the
 507                          * user passed in.
 508                          */
 509                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 510                                             inccb->ccb_h.path_id,
 511                                             inccb->ccb_h.target_id,
 512                                             inccb->ccb_h.target_lun) !=
 513                                             CAM_REQ_CMP){
 514                                 error = EINVAL;
 515                                 break;
 516                         }
 517                         /* Ensure all of our fields are correct */
 518                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 519                                       inccb->ccb_h.pinfo.priority);
 520                         xpt_merge_ccb(&ccb, inccb);
 521                         xpt_action(&ccb);
 522                         bcopy(&ccb, inccb, sizeof(union ccb));
 523                         xpt_free_path(ccb.ccb_h.path);
 524                         break;
 525
 526                 }
 527                 case XPT_DEV_MATCH: {
 528                         struct cam_periph_map_info mapinfo;
 529                         struct cam_path *old_path;
 530
 531                         /*
 532                          * We can't deal with physical addresses for this
 533                          * type of transaction.
 534                          */
 535                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 536                             CAM_DATA_VADDR) {
 537                                 error = EINVAL;
 538                                 break;
 539                         }
 540
 541                         /*
 542                          * Save this in case the caller had it set to
 543                          * something in particular.
 544                          */
 545                         old_path = inccb->ccb_h.path;
 546
 547                         /*
 548                          * We really don't need a path for the matching
 549                          * code.  The path is needed because of the
 550                          * debugging statements in xpt_action().  They
 551                          * assume that the CCB has a valid path.
 552                          */
 553                         inccb->ccb_h.path = xpt_periph->path;
 554
 555                         bzero(&mapinfo, sizeof(mapinfo));
 556
 557                         /*
 558                          * Map the pattern and match buffers into kernel
 559                          * virtual address space.
 560                          */
 561                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 562
 563                         if (error) {
 564                                 inccb->ccb_h.path = old_path;
 565                                 break;
 566                         }
 567
 568                         /*
 569                          * This is an immediate CCB, we can send it on directly.
 570                          */
 571                         xpt_action(inccb);
 572
 573                         /*
 574                          * Map the buffers back into user space.
 575                          */
 576                         cam_periph_unmapmem(inccb, &mapinfo);
 577
 578                         inccb->ccb_h.path = old_path;
 579
 580                         error = 0;
 581                         break;
 582                 }
 583                 default:
 584                         error = ENOTSUP;
 585                         break;
 586                 }
 587                 xpt_release_bus(bus);
 588                 break;
 589         }
 590         /*
 591          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 592          * with the periphal driver name and unit name filled in.  The other
 593          * fields don't really matter as input.  The passthrough driver name
 594          * ("pass"), and unit number are passed back in the ccb.  The current
 595          * device generation number, and the index into the device peripheral
 596          * driver list, and the status are also passed back.  Note that
 597          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 598          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 599          * (or rather should be) impossible for the device peripheral driver
 600          * list to change since we look at the whole thing in one pass, and
 601          * we do it with lock protection.
 602          *
 603          */
 604         case CAMGETPASSTHRU: {
 605                 union ccb *ccb;
 606                 struct cam_periph *periph;
 607                 struct periph_driver **p_drv;
 608                 char   *name;
 609                 u_int unit;
 610                 int base_periph_found;
 611
 612                 ccb = (union ccb *)addr;
 613                 unit = ccb->cgdl.unit_number;
 614                 name = ccb->cgdl.periph_name;
 615                 base_periph_found = 0;
 616 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 617                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 618                         ccb->csio.bio = NULL;
 619 #endif
 620
 621                 /*
 622                  * Sanity check -- make sure we don't get a null peripheral
 623                  * driver name.
 624                  */
 625                 if (*ccb->cgdl.periph_name == '\0') {
 626                         error = EINVAL;
 627                         break;
 628                 }
 629
 630                 /* Keep the list from changing while we traverse it */
 631                 xpt_lock_buses();
 632
 633                 /* first find our driver in the list of drivers */
 634                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 635                         if (strcmp((*p_drv)->driver_name, name) == 0)
 636                                 break;
 637
 638                 if (*p_drv == NULL) {
 639                         xpt_unlock_buses();
 640                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 641                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 642                         *ccb->cgdl.periph_name = '\0';
 643                         ccb->cgdl.unit_number = 0;
 644                         error = ENOENT;
 645                         break;
 646                 }
 647
 648                 /*
 649                  * Run through every peripheral instance of this driver
 650                  * and check to see whether it matches the unit passed
 651                  * in by the user.  If it does, get out of the loops and
 652                  * find the passthrough driver associated with that
 653                  * peripheral driver.
 654                  */
 655                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 656                      periph = TAILQ_NEXT(periph, unit_links)) {
 657
 658                         if (periph->unit_number == unit)
 659                                 break;
 660                 }
 661                 /*
 662                  * If we found the peripheral driver that the user passed
 663                  * in, go through all of the peripheral drivers for that
 664                  * particular device and look for a passthrough driver.
 665                  */
 666                 if (periph != NULL) {
 667                         struct cam_ed *device;
 668                         int i;
 669
 670                         base_periph_found = 1;
 671                         device = periph->path->device;
 672                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 673                              periph != NULL;
 674                              periph = SLIST_NEXT(periph, periph_links), i++) {
 675                                 /*
 676                                  * Check to see whether we have a
 677                                  * passthrough device or not.
 678                                  */
 679                                 if (strcmp(periph->periph_name, "pass") == 0) {
 680                                         /*
 681                                          * Fill in the getdevlist fields.
 682                                          */
 683                                         strlcpy(ccb->cgdl.periph_name,
 684                                                periph->periph_name,
 685                                                sizeof(ccb->cgdl.periph_name));
 686                                         ccb->cgdl.unit_number =
 687                                                 periph->unit_number;
 688                                         if (SLIST_NEXT(periph, periph_links))
 689                                                 ccb->cgdl.status =
 690                                                         CAM_GDEVLIST_MORE_DEVS;
 691                                         else
 692                                                 ccb->cgdl.status =
 693                                                        CAM_GDEVLIST_LAST_DEVICE;
 694                                         ccb->cgdl.generation =
 695                                                 device->generation;
 696                                         ccb->cgdl.index = i;
 697                                         /*
 698                                          * Fill in some CCB header fields
 699                                          * that the user may want.
 700                                          */
 701                                         ccb->ccb_h.path_id =
 702                                                 periph->path->bus->path_id;
 703                                         ccb->ccb_h.target_id =
 704                                                 periph->path->target->target_id;
 705                                         ccb->ccb_h.target_lun =
 706                                                 periph->path->device->lun_id;
 707                                         ccb->ccb_h.status = CAM_REQ_CMP;
 708                                         break;
 709                                 }
 710                         }
 711                 }
 712
 713                 /*
 714                  * If the periph is null here, one of two things has
 715                  * happened.  The first possibility is that we couldn't
 716                  * find the unit number of the particular peripheral driver
 717                  * that the user is asking about.  e.g. the user asks for
 718                  * the passthrough driver for "da11".  We find the list of
 719                  * "da" peripherals all right, but there is no unit 11.
 720                  * The other possibility is that we went through the list
 721                  * of peripheral drivers attached to the device structure,
 722                  * but didn't find one with the name "pass".  Either way,
 723                  * we return ENOENT, since we couldn't find something.
 724                  */
 725                 if (periph == NULL) {
 726                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 727                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 728                         *ccb->cgdl.periph_name = '\0';
 729                         ccb->cgdl.unit_number = 0;
 730                         error = ENOENT;
 731                         /*
 732                          * It is unfortunate that this is even necessary,
 733                          * but there are many, many clueless users out there.
 734                          * If this is true, the user is looking for the
 735                          * passthrough driver, but doesn't have one in his
 736                          * kernel.
 737                          */
 738                         if (base_periph_found == 1) {
 739                                 printf("xptioctl: pass driver is not in the "
 740                                        "kernel\n");
 741                                 printf("xptioctl: put \"device pass\" in "
 742                                        "your kernel config file\n");
 743                         }
 744                 }
 745                 xpt_unlock_buses();
 746                 break;
 747                 }
 748         default:
 749                 error = ENOTTY;
 750                 break;
 751         }
 752
 753         return(error);
 754 }
 755
 756 static int
 757 cam_module_event_handler(module_t mod, int what, void *arg)
 758 {
 759         int error;
 760
 761         switch (what) {
 762         case MOD_LOAD:
 763                 if ((error = xpt_init(NULL)) != 0)
 764                         return (error);
 765                 break;
 766         case MOD_UNLOAD:
 767                 return EBUSY;
 768         default:
 769                 return EOPNOTSUPP;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static struct xpt_proto *
 776 xpt_proto_find(cam_proto proto)
 777 {
 778         struct xpt_proto **pp;
 779
 780         SET_FOREACH(pp, cam_xpt_proto_set) {
 781                 if ((*pp)->proto == proto)
 782                         return *pp;
 783         }
 784
 785         return NULL;
 786 }
 787
 788 static void
 789 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 790 {
 791
 792         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 793                 xpt_free_path(done_ccb->ccb_h.path);
 794                 xpt_free_ccb(done_ccb);
 795         } else {
 796                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 797                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 798         }
 799         xpt_release_boot();
 800 }
 801
 802 /* thread to handle bus rescans */
 803 static void
 804 xpt_scanner_thread(void *dummy)
 805 {
 806         union ccb       *ccb;
 807         struct mtx      *mtx;
 808         struct cam_ed   *device;
 809
 810         xpt_lock_buses();
 811         for (;;) {
 812                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 813                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 814                                "-", 0);
 815                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 816                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 817                         xpt_unlock_buses();
 818
 819                         /*
 820                          * We need to lock the device's mutex which we use as
 821                          * the path mutex. We can't do it directly because the
 822                          * cam_path in the ccb may wind up going away because
 823                          * the path lock may be dropped and the path retired in
 824                          * the completion callback. We do this directly to keep
 825                          * the reference counts in cam_path sane. We also have
 826                          * to copy the device pointer because ccb_h.path may
 827                          * be freed in the callback.
 828                          */
 829                         mtx = xpt_path_mtx(ccb->ccb_h.path);
 830                         device = ccb->ccb_h.path->device;
 831                         xpt_acquire_device(device);
 832                         mtx_lock(mtx);
 833                         xpt_action(ccb);
 834                         mtx_unlock(mtx);
 835                         xpt_release_device(device);
 836
 837                         xpt_lock_buses();
 838                 }
 839         }
 840 }
 841
 842 void
 843 xpt_rescan(union ccb *ccb)
 844 {
 845         struct ccb_hdr *hdr;
 846
 847         /* Prepare request */
 848         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 849             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 850                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 851         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 852             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 853                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 854         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 855             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 856                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 857         else {
 858                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 859                 xpt_free_path(ccb->ccb_h.path);
 860                 xpt_free_ccb(ccb);
 861                 return;
 862         }
 863         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 864             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 865                 xpt_action_name(ccb->ccb_h.func_code)));
 866
 867         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 868         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 869         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 870         /* Don't make duplicate entries for the same paths. */
 871         xpt_lock_buses();
 872         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 873                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 874                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 875                                 wakeup(&xsoftc.ccb_scanq);
 876                                 xpt_unlock_buses();
 877                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 878                                 xpt_free_path(ccb->ccb_h.path);
 879                                 xpt_free_ccb(ccb);
 880                                 return;
 881                         }
 882                 }
 883         }
 884         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 885         xpt_hold_boot_locked();
 886         wakeup(&xsoftc.ccb_scanq);
 887         xpt_unlock_buses();
 888 }
 889
 890 /* Functions accessed by the peripheral drivers */
 891 static int
 892 xpt_init(void *dummy)
 893 {
 894         struct cam_sim *xpt_sim;
 895         struct cam_path *path;
 896         struct cam_devq *devq;
 897         cam_status status;
 898         int error, i;
 899
 900         TAILQ_INIT(&xsoftc.xpt_busses);
 901         TAILQ_INIT(&xsoftc.ccb_scanq);
 902         STAILQ_INIT(&xsoftc.highpowerq);
 903         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 904
 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         /*
 918          * The xpt layer is, itself, the equivalent of a SIM.
 919          * Allow 16 ccbs in the ccb pool for it.  This should
 920          * give decent parallelism when we probe buses and
 921          * perform other XPT functions.
 922          */
 923         devq = cam_simq_alloc(16);
 924         xpt_sim = cam_sim_alloc(xptaction,
 925                                 xptpoll,
 926                                 "xpt",
 927                                 /*softc*/NULL,
 928                                 /*unit*/0,
 929                                 /*mtx*/NULL,
 930                                 /*max_dev_transactions*/0,
 931                                 /*max_tagged_dev_transactions*/0,
 932                                 devq);
 933         if (xpt_sim == NULL)
 934                 return (ENOMEM);
 935
 936         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 937                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 938                        " failing attach\n", status);
 939                 return (EINVAL);
 940         }
 941
 942         /*
 943          * Looking at the XPT from the SIM layer, the XPT is
 944          * the equivalent of a peripheral driver.  Allocate
 945          * a peripheral driver entry for us.
 946          */
 947         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 948                                       CAM_TARGET_WILDCARD,
 949                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 950                 printf("xpt_init: xpt_create_path failed with status %#x,"
 951                        " failing attach\n", status);
 952                 return (EINVAL);
 953         }
 954         xpt_path_lock(path);
 955         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 956                          path, NULL, 0, xpt_sim);
 957         xpt_path_unlock(path);
 958         xpt_free_path(path);
 959
 960         if (cam_num_doneqs < 1)
 961                 cam_num_doneqs = 1 + mp_ncpus / 6;
 962         else if (cam_num_doneqs > MAXCPU)
 963                 cam_num_doneqs = MAXCPU;
 964         for (i = 0; i < cam_num_doneqs; i++) {
 965                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 966                     MTX_DEF);
 967                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 968                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 969                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 970                 if (error != 0) {
 971                         cam_num_doneqs = i;
 972                         break;
 973                 }
 974         }
 975         if (cam_num_doneqs < 1) {
 976                 printf("xpt_init: Cannot init completion queues "
 977                        "- failing attach\n");
 978                 return (ENOMEM);
 979         }
 980
 981         /*
 982          * Register a callback for when interrupts are enabled.
 983          */
 984         config_intrhook_oneshot(xpt_config, NULL);
 985
 986         return (0);
 987 }
 988
 989 static cam_status
 990 xptregister(struct cam_periph *periph, void *arg)
 991 {
 992         struct cam_sim *xpt_sim;
 993
 994         if (periph == NULL) {
 995                 printf("xptregister: periph was NULL!!\n");
 996                 return(CAM_REQ_CMP_ERR);
 997         }
 998
 999         xpt_sim = (struct cam_sim *)arg;
1000         xpt_sim->softc = periph;
1001         xpt_periph = periph;
1002         periph->softc = NULL;
1003
1004         return(CAM_REQ_CMP);
1005 }
1006
1007 int32_t
1008 xpt_add_periph(struct cam_periph *periph)
1009 {
1010         struct cam_ed *device;
1011         int32_t  status;
1012
1013         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1014         device = periph->path->device;
1015         status = CAM_REQ_CMP;
1016         if (device != NULL) {
1017                 mtx_lock(&device->target->bus->eb_mtx);
1018                 device->generation++;
1019                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1020                 mtx_unlock(&device->target->bus->eb_mtx);
1021                 atomic_add_32(&xsoftc.xpt_generation, 1);
1022         }
1023
1024         return (status);
1025 }
1026
1027 void
1028 xpt_remove_periph(struct cam_periph *periph)
1029 {
1030         struct cam_ed *device;
1031
1032         device = periph->path->device;
1033         if (device != NULL) {
1034                 mtx_lock(&device->target->bus->eb_mtx);
1035                 device->generation++;
1036                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1037                 mtx_unlock(&device->target->bus->eb_mtx);
1038                 atomic_add_32(&xsoftc.xpt_generation, 1);
1039         }
1040 }
1041
1042
1043 void
1044 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1045 {
1046         struct  cam_path *path = periph->path;
1047         struct  xpt_proto *proto;
1048
1049         cam_periph_assert(periph, MA_OWNED);
1050         periph->flags |= CAM_PERIPH_ANNOUNCED;
1051
1052         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1053                periph->periph_name, periph->unit_number,
1054                path->bus->sim->sim_name,
1055                path->bus->sim->unit_number,
1056                path->bus->sim->bus_id,
1057                path->bus->path_id,
1058                path->target->target_id,
1059                (uintmax_t)path->device->lun_id);
1060         printf("%s%d: ", periph->periph_name, periph->unit_number);
1061         proto = xpt_proto_find(path->device->protocol);
1062         if (proto)
1063                 proto->ops->announce(path->device);
1064         else
1065                 printf("%s%d: Unknown protocol device %d\n",
1066                     periph->periph_name, periph->unit_number,
1067                     path->device->protocol);
1068         if (path->device->serial_num_len > 0) {
1069                 /* Don't wrap the screen  - print only the first 60 chars */
1070                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1071                        periph->unit_number, path->device->serial_num);
1072         }
1073         /* Announce transport details. */
1074         path->bus->xport->ops->announce(periph);
1075         /* Announce command queueing. */
1076         if (path->device->inq_flags & SID_CmdQue
1077          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1078                 printf("%s%d: Command Queueing enabled\n",
1079                        periph->periph_name, periph->unit_number);
1080         }
1081         /* Announce caller's details if they've passed in. */
1082         if (announce_string != NULL)
1083                 printf("%s%d: %s\n", periph->periph_name,
1084                        periph->unit_number, announce_string);
1085 }
1086
1087 void
1088 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1089     char *announce_string)
1090 {
1091         struct  cam_path *path = periph->path;
1092         struct  xpt_proto *proto;
1093
1094         cam_periph_assert(periph, MA_OWNED);
1095         periph->flags |= CAM_PERIPH_ANNOUNCED;
1096
1097         /* Fall back to the non-sbuf method if necessary */
1098         if (xsoftc.announce_nosbuf != 0) {
1099                 xpt_announce_periph(periph, announce_string);
1100                 return;
1101         }
1102         proto = xpt_proto_find(path->device->protocol);
1103         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1104             (path->bus->xport->ops->announce_sbuf == NULL)) {
1105                 xpt_announce_periph(periph, announce_string);
1106                 return;
1107         }
1108
1109         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1110             periph->periph_name, periph->unit_number,
1111             path->bus->sim->sim_name,
1112             path->bus->sim->unit_number,
1113             path->bus->sim->bus_id,
1114             path->bus->path_id,
1115             path->target->target_id,
1116             (uintmax_t)path->device->lun_id);
1117         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1118
1119         if (proto)
1120                 proto->ops->announce_sbuf(path->device, sb);
1121         else
1122                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1123                     periph->periph_name, periph->unit_number,
1124                     path->device->protocol);
1125         if (path->device->serial_num_len > 0) {
1126                 /* Don't wrap the screen  - print only the first 60 chars */
1127                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1128                     periph->periph_name, periph->unit_number,
1129                     path->device->serial_num);
1130         }
1131         /* Announce transport details. */
1132         path->bus->xport->ops->announce_sbuf(periph, sb);
1133         /* Announce command queueing. */
1134         if (path->device->inq_flags & SID_CmdQue
1135          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1136                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1137                     periph->periph_name, periph->unit_number);
1138         }
1139         /* Announce caller's details if they've passed in. */
1140         if (announce_string != NULL)
1141                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1142                     periph->unit_number, announce_string);
1143 }
1144
1145 void
1146 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1147 {
1148         if (quirks != 0) {
1149                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1150                     periph->unit_number, quirks, bit_string);
1151         }
1152 }
1153
1154 void
1155 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1156                          int quirks, char *bit_string)
1157 {
1158         if (xsoftc.announce_nosbuf != 0) {
1159                 xpt_announce_quirks(periph, quirks, bit_string);
1160                 return;
1161         }
1162
1163         if (quirks != 0) {
1164                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1165                     periph->unit_number, quirks, bit_string);
1166         }
1167 }
1168
1169 void
1170 xpt_denounce_periph(struct cam_periph *periph)
1171 {
1172         struct  cam_path *path = periph->path;
1173         struct  xpt_proto *proto;
1174
1175         cam_periph_assert(periph, MA_OWNED);
1176         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1177                periph->periph_name, periph->unit_number,
1178                path->bus->sim->sim_name,
1179                path->bus->sim->unit_number,
1180                path->bus->sim->bus_id,
1181                path->bus->path_id,
1182                path->target->target_id,
1183                (uintmax_t)path->device->lun_id);
1184         printf("%s%d: ", periph->periph_name, periph->unit_number);
1185         proto = xpt_proto_find(path->device->protocol);
1186         if (proto)
1187                 proto->ops->denounce(path->device);
1188         else
1189                 printf("%s%d: Unknown protocol device %d\n",
1190                     periph->periph_name, periph->unit_number,
1191                     path->device->protocol);
1192         if (path->device->serial_num_len > 0)
1193                 printf(" s/n %.60s", path->device->serial_num);
1194         printf(" detached\n");
1195 }
1196
1197 void
1198 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1199 {
1200         struct cam_path *path = periph->path;
1201         struct xpt_proto *proto;
1202
1203         cam_periph_assert(periph, MA_OWNED);
1204
1205         /* Fall back to the non-sbuf method if necessary */
1206         if (xsoftc.announce_nosbuf != 0) {
1207                 xpt_denounce_periph(periph);
1208                 return;
1209         }
1210         proto = xpt_proto_find(path->device->protocol);
1211         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1212                 xpt_denounce_periph(periph);
1213                 return;
1214         }
1215
1216         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1217             periph->periph_name, periph->unit_number,
1218             path->bus->sim->sim_name,
1219             path->bus->sim->unit_number,
1220             path->bus->sim->bus_id,
1221             path->bus->path_id,
1222             path->target->target_id,
1223             (uintmax_t)path->device->lun_id);
1224         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1225
1226         if (proto)
1227                 proto->ops->denounce_sbuf(path->device, sb);
1228         else
1229                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1230                     periph->periph_name, periph->unit_number,
1231                     path->device->protocol);
1232         if (path->device->serial_num_len > 0)
1233                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1234         sbuf_printf(sb, " detached\n");
1235 }
1236
1237 int
1238 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1239 {
1240         int ret = -1, l, o;
1241         struct ccb_dev_advinfo cdai;
1242         struct scsi_vpd_device_id *did;
1243         struct scsi_vpd_id_descriptor *idd;
1244
1245         xpt_path_assert(path, MA_OWNED);
1246
1247         memset(&cdai, 0, sizeof(cdai));
1248         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1249         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1250         cdai.flags = CDAI_FLAG_NONE;
1251         cdai.bufsiz = len;
1252         cdai.buf = buf;
1253
1254         if (!strcmp(attr, "GEOM::ident"))
1255                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1256         else if (!strcmp(attr, "GEOM::physpath"))
1257                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1258         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1259                  strcmp(attr, "GEOM::lunname") == 0) {
1260                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1261                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1262                 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1263                 if (cdai.buf == NULL) {
1264                         ret = ENOMEM;
1265                         goto out;
1266                 }
1267         } else
1268                 goto out;
1269
1270         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1271         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1272                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1273         if (cdai.provsiz == 0)
1274                 goto out;
1275         switch(cdai.buftype) {
1276         case CDAI_TYPE_SCSI_DEVID:
1277                 did = (struct scsi_vpd_device_id *)cdai.buf;
1278                 if (strcmp(attr, "GEOM::lunid") == 0) {
1279                         idd = scsi_get_devid(did, cdai.provsiz,
1280                             scsi_devid_is_lun_naa);
1281                         if (idd == NULL)
1282                                 idd = scsi_get_devid(did, cdai.provsiz,
1283                                     scsi_devid_is_lun_eui64);
1284                         if (idd == NULL)
1285                                 idd = scsi_get_devid(did, cdai.provsiz,
1286                                     scsi_devid_is_lun_uuid);
1287                         if (idd == NULL)
1288                                 idd = scsi_get_devid(did, cdai.provsiz,
1289                                     scsi_devid_is_lun_md5);
1290                 } else
1291                         idd = NULL;
1292
1293                 if (idd == NULL)
1294                         idd = scsi_get_devid(did, cdai.provsiz,
1295                             scsi_devid_is_lun_t10);
1296                 if (idd == NULL)
1297                         idd = scsi_get_devid(did, cdai.provsiz,
1298                             scsi_devid_is_lun_name);
1299                 if (idd == NULL)
1300                         break;
1301
1302                 ret = 0;
1303                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1304                     SVPD_ID_CODESET_ASCII) {
1305                         if (idd->length < len) {
1306                                 for (l = 0; l < idd->length; l++)
1307                                         buf[l] = idd->identifier[l] ?
1308                                             idd->identifier[l] : ' ';
1309                                 buf[l] = 0;
1310                         } else
1311                                 ret = EFAULT;
1312                         break;
1313                 }
1314                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1315                     SVPD_ID_CODESET_UTF8) {
1316                         l = strnlen(idd->identifier, idd->length);
1317                         if (l < len) {
1318                                 bcopy(idd->identifier, buf, l);
1319                                 buf[l] = 0;
1320                         } else
1321                                 ret = EFAULT;
1322                         break;
1323                 }
1324                 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1325                     SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1326                         if ((idd->length - 2) * 2 + 4 >= len) {
1327                                 ret = EFAULT;
1328                                 break;
1329                         }
1330                         for (l = 2, o = 0; l < idd->length; l++) {
1331                                 if (l == 6 || l == 8 || l == 10 || l == 12)
1332                                     o += sprintf(buf + o, "-");
1333                                 o += sprintf(buf + o, "%02x",
1334                                     idd->identifier[l]);
1335                         }
1336                         break;
1337                 }
1338                 if (idd->length * 2 < len) {
1339                         for (l = 0; l < idd->length; l++)
1340                                 sprintf(buf + l * 2, "%02x",
1341                                     idd->identifier[l]);
1342                 } else
1343                                 ret = EFAULT;
1344                 break;
1345         default:
1346                 if (cdai.provsiz < len) {
1347                         cdai.buf[cdai.provsiz] = 0;
1348                         ret = 0;
1349                 } else
1350                         ret = EFAULT;
1351                 break;
1352         }
1353
1354 out:
1355         if ((char *)cdai.buf != buf)
1356                 free(cdai.buf, M_CAMXPT);
1357         return ret;
1358 }
1359
1360 static dev_match_ret
1361 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1362             struct cam_eb *bus)
1363 {
1364         dev_match_ret retval;
1365         u_int i;
1366
1367         retval = DM_RET_NONE;
1368
1369         /*
1370          * If we aren't given something to match against, that's an error.
1371          */
1372         if (bus == NULL)
1373                 return(DM_RET_ERROR);
1374
1375         /*
1376          * If there are no match entries, then this bus matches no
1377          * matter what.
1378          */
1379         if ((patterns == NULL) || (num_patterns == 0))
1380                 return(DM_RET_DESCEND | DM_RET_COPY);
1381
1382         for (i = 0; i < num_patterns; i++) {
1383                 struct bus_match_pattern *cur_pattern;
1384
1385                 /*
1386                  * If the pattern in question isn't for a bus node, we
1387                  * aren't interested.  However, we do indicate to the
1388                  * calling routine that we should continue descending the
1389                  * tree, since the user wants to match against lower-level
1390                  * EDT elements.
1391                  */
1392                 if (patterns[i].type != DEV_MATCH_BUS) {
1393                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1394                                 retval |= DM_RET_DESCEND;
1395                         continue;
1396                 }
1397
1398                 cur_pattern = &patterns[i].pattern.bus_pattern;
1399
1400                 /*
1401                  * If they want to match any bus node, we give them any
1402                  * device node.
1403                  */
1404                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1405                         /* set the copy flag */
1406                         retval |= DM_RET_COPY;
1407
1408                         /*
1409                          * If we've already decided on an action, go ahead
1410                          * and return.
1411                          */
1412                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1413                                 return(retval);
1414                 }
1415
1416                 /*
1417                  * Not sure why someone would do this...
1418                  */
1419                 if (cur_pattern->flags == BUS_MATCH_NONE)
1420                         continue;
1421
1422                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1423                  && (cur_pattern->path_id != bus->path_id))
1424                         continue;
1425
1426                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1427                  && (cur_pattern->bus_id != bus->sim->bus_id))
1428                         continue;
1429
1430                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1431                  && (cur_pattern->unit_number != bus->sim->unit_number))
1432                         continue;
1433
1434                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1435                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1436                              DEV_IDLEN) != 0))
1437                         continue;
1438
1439                 /*
1440                  * If we get to this point, the user definitely wants
1441                  * information on this bus.  So tell the caller to copy the
1442                  * data out.
1443                  */
1444                 retval |= DM_RET_COPY;
1445
1446                 /*
1447                  * If the return action has been set to descend, then we
1448                  * know that we've already seen a non-bus matching
1449                  * expression, therefore we need to further descend the tree.
1450                  * This won't change by continuing around the loop, so we
1451                  * go ahead and return.  If we haven't seen a non-bus
1452                  * matching expression, we keep going around the loop until
1453                  * we exhaust the matching expressions.  We'll set the stop
1454                  * flag once we fall out of the loop.
1455                  */
1456                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1457                         return(retval);
1458         }
1459
1460         /*
1461          * If the return action hasn't been set to descend yet, that means
1462          * we haven't seen anything other than bus matching patterns.  So
1463          * tell the caller to stop descending the tree -- the user doesn't
1464          * want to match against lower level tree elements.
1465          */
1466         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1467                 retval |= DM_RET_STOP;
1468
1469         return(retval);
1470 }
1471
1472 static dev_match_ret
1473 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1474                struct cam_ed *device)
1475 {
1476         dev_match_ret retval;
1477         u_int i;
1478
1479         retval = DM_RET_NONE;
1480
1481         /*
1482          * If we aren't given something to match against, that's an error.
1483          */
1484         if (device == NULL)
1485                 return(DM_RET_ERROR);
1486
1487         /*
1488          * If there are no match entries, then this device matches no
1489          * matter what.
1490          */
1491         if ((patterns == NULL) || (num_patterns == 0))
1492                 return(DM_RET_DESCEND | DM_RET_COPY);
1493
1494         for (i = 0; i < num_patterns; i++) {
1495                 struct device_match_pattern *cur_pattern;
1496                 struct scsi_vpd_device_id *device_id_page;
1497
1498                 /*
1499                  * If the pattern in question isn't for a device node, we
1500                  * aren't interested.
1501                  */
1502                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1503                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1504                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1505                                 retval |= DM_RET_DESCEND;
1506                         continue;
1507                 }
1508
1509                 cur_pattern = &patterns[i].pattern.device_pattern;
1510
1511                 /* Error out if mutually exclusive options are specified. */
1512                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1513                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1514                         return(DM_RET_ERROR);
1515
1516                 /*
1517                  * If they want to match any device node, we give them any
1518                  * device node.
1519                  */
1520                 if (cur_pattern->flags == DEV_MATCH_ANY)
1521                         goto copy_dev_node;
1522
1523                 /*
1524                  * Not sure why someone would do this...
1525                  */
1526                 if (cur_pattern->flags == DEV_MATCH_NONE)
1527                         continue;
1528
1529                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1530                  && (cur_pattern->path_id != device->target->bus->path_id))
1531                         continue;
1532
1533                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1534                  && (cur_pattern->target_id != device->target->target_id))
1535                         continue;
1536
1537                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1538                  && (cur_pattern->target_lun != device->lun_id))
1539                         continue;
1540
1541                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1542                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1543                                     (caddr_t)&cur_pattern->data.inq_pat,
1544                                     1, sizeof(cur_pattern->data.inq_pat),
1545                                     scsi_static_inquiry_match) == NULL))
1546                         continue;
1547
1548                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1549                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1550                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1551                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1552                                       device->device_id_len
1553                                     - SVPD_DEVICE_ID_HDR_LEN,
1554                                       cur_pattern->data.devid_pat.id,
1555                                       cur_pattern->data.devid_pat.id_len) != 0))
1556                         continue;
1557
1558 copy_dev_node:
1559                 /*
1560                  * If we get to this point, the user definitely wants
1561                  * information on this device.  So tell the caller to copy
1562                  * the data out.
1563                  */
1564                 retval |= DM_RET_COPY;
1565
1566                 /*
1567                  * If the return action has been set to descend, then we
1568                  * know that we've already seen a peripheral matching
1569                  * expression, therefore we need to further descend the tree.
1570                  * This won't change by continuing around the loop, so we
1571                  * go ahead and return.  If we haven't seen a peripheral
1572                  * matching expression, we keep going around the loop until
1573                  * we exhaust the matching expressions.  We'll set the stop
1574                  * flag once we fall out of the loop.
1575                  */
1576                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1577                         return(retval);
1578         }
1579
1580         /*
1581          * If the return action hasn't been set to descend yet, that means
1582          * we haven't seen any peripheral matching patterns.  So tell the
1583          * caller to stop descending the tree -- the user doesn't want to
1584          * match against lower level tree elements.
1585          */
1586         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1587                 retval |= DM_RET_STOP;
1588
1589         return(retval);
1590 }
1591
1592 /*
1593  * Match a single peripheral against any number of match patterns.
1594  */
1595 static dev_match_ret
1596 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1597                struct cam_periph *periph)
1598 {
1599         dev_match_ret retval;
1600         u_int i;
1601
1602         /*
1603          * If we aren't given something to match against, that's an error.
1604          */
1605         if (periph == NULL)
1606                 return(DM_RET_ERROR);
1607
1608         /*
1609          * If there are no match entries, then this peripheral matches no
1610          * matter what.
1611          */
1612         if ((patterns == NULL) || (num_patterns == 0))
1613                 return(DM_RET_STOP | DM_RET_COPY);
1614
1615         /*
1616          * There aren't any nodes below a peripheral node, so there's no
1617          * reason to descend the tree any further.
1618          */
1619         retval = DM_RET_STOP;
1620
1621         for (i = 0; i < num_patterns; i++) {
1622                 struct periph_match_pattern *cur_pattern;
1623
1624                 /*
1625                  * If the pattern in question isn't for a peripheral, we
1626                  * aren't interested.
1627                  */
1628                 if (patterns[i].type != DEV_MATCH_PERIPH)
1629                         continue;
1630
1631                 cur_pattern = &patterns[i].pattern.periph_pattern;
1632
1633                 /*
1634                  * If they want to match on anything, then we will do so.
1635                  */
1636                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1637                         /* set the copy flag */
1638                         retval |= DM_RET_COPY;
1639
1640                         /*
1641                          * We've already set the return action to stop,
1642                          * since there are no nodes below peripherals in
1643                          * the tree.
1644                          */
1645                         return(retval);
1646                 }
1647
1648                 /*
1649                  * Not sure why someone would do this...
1650                  */
1651                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1652                         continue;
1653
1654                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1655                  && (cur_pattern->path_id != periph->path->bus->path_id))
1656                         continue;
1657
1658                 /*
1659                  * For the target and lun id's, we have to make sure the
1660                  * target and lun pointers aren't NULL.  The xpt peripheral
1661                  * has a wildcard target and device.
1662                  */
1663                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1664                  && ((periph->path->target == NULL)
1665                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1666                         continue;
1667
1668                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1669                  && ((periph->path->device == NULL)
1670                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1671                         continue;
1672
1673                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1674                  && (cur_pattern->unit_number != periph->unit_number))
1675                         continue;
1676
1677                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1678                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1679                              DEV_IDLEN) != 0))
1680                         continue;
1681
1682                 /*
1683                  * If we get to this point, the user definitely wants
1684                  * information on this peripheral.  So tell the caller to
1685                  * copy the data out.
1686                  */
1687                 retval |= DM_RET_COPY;
1688
1689                 /*
1690                  * The return action has already been set to stop, since
1691                  * peripherals don't have any nodes below them in the EDT.
1692                  */
1693                 return(retval);
1694         }
1695
1696         /*
1697          * If we get to this point, the peripheral that was passed in
1698          * doesn't match any of the patterns.
1699          */
1700         return(retval);
1701 }
1702
1703 static int
1704 xptedtbusfunc(struct cam_eb *bus, void *arg)
1705 {
1706         struct ccb_dev_match *cdm;
1707         struct cam_et *target;
1708         dev_match_ret retval;
1709
1710         cdm = (struct ccb_dev_match *)arg;
1711
1712         /*
1713          * If our position is for something deeper in the tree, that means
1714          * that we've already seen this node.  So, we keep going down.
1715          */
1716         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1717          && (cdm->pos.cookie.bus == bus)
1718          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1719          && (cdm->pos.cookie.target != NULL))
1720                 retval = DM_RET_DESCEND;
1721         else
1722                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1723
1724         /*
1725          * If we got an error, bail out of the search.
1726          */
1727         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1728                 cdm->status = CAM_DEV_MATCH_ERROR;
1729                 return(0);
1730         }
1731
1732         /*
1733          * If the copy flag is set, copy this bus out.
1734          */
1735         if (retval & DM_RET_COPY) {
1736                 int spaceleft, j;
1737
1738                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1739                         sizeof(struct dev_match_result));
1740
1741                 /*
1742                  * If we don't have enough space to put in another
1743                  * match result, save our position and tell the
1744                  * user there are more devices to check.
1745                  */
1746                 if (spaceleft < sizeof(struct dev_match_result)) {
1747                         bzero(&cdm->pos, sizeof(cdm->pos));
1748                         cdm->pos.position_type =
1749                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1750
1751                         cdm->pos.cookie.bus = bus;
1752                         cdm->pos.generations[CAM_BUS_GENERATION]=
1753                                 xsoftc.bus_generation;
1754                         cdm->status = CAM_DEV_MATCH_MORE;
1755                         return(0);
1756                 }
1757                 j = cdm->num_matches;
1758                 cdm->num_matches++;
1759                 cdm->matches[j].type = DEV_MATCH_BUS;
1760                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1761                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1762                 cdm->matches[j].result.bus_result.unit_number =
1763                         bus->sim->unit_number;
1764                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1765                         bus->sim->sim_name,
1766                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1767         }
1768
1769         /*
1770          * If the user is only interested in buses, there's no
1771          * reason to descend to the next level in the tree.
1772          */
1773         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1774                 return(1);
1775
1776         /*
1777          * If there is a target generation recorded, check it to
1778          * make sure the target list hasn't changed.
1779          */
1780         mtx_lock(&bus->eb_mtx);
1781         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1782          && (cdm->pos.cookie.bus == bus)
1783          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1784          && (cdm->pos.cookie.target != NULL)) {
1785                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1786                     bus->generation)) {
1787                         mtx_unlock(&bus->eb_mtx);
1788                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1789                         return (0);
1790                 }
1791                 target = (struct cam_et *)cdm->pos.cookie.target;
1792                 target->refcount++;
1793         } else
1794                 target = NULL;
1795         mtx_unlock(&bus->eb_mtx);
1796
1797         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1798 }
1799
1800 static int
1801 xptedttargetfunc(struct cam_et *target, void *arg)
1802 {
1803         struct ccb_dev_match *cdm;
1804         struct cam_eb *bus;
1805         struct cam_ed *device;
1806
1807         cdm = (struct ccb_dev_match *)arg;
1808         bus = target->bus;
1809
1810         /*
1811          * If there is a device list generation recorded, check it to
1812          * make sure the device list hasn't changed.
1813          */
1814         mtx_lock(&bus->eb_mtx);
1815         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1816          && (cdm->pos.cookie.bus == bus)
1817          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1818          && (cdm->pos.cookie.target == target)
1819          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1820          && (cdm->pos.cookie.device != NULL)) {
1821                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1822                     target->generation) {
1823                         mtx_unlock(&bus->eb_mtx);
1824                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1825                         return(0);
1826                 }
1827                 device = (struct cam_ed *)cdm->pos.cookie.device;
1828                 device->refcount++;
1829         } else
1830                 device = NULL;
1831         mtx_unlock(&bus->eb_mtx);
1832
1833         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1834 }
1835
1836 static int
1837 xptedtdevicefunc(struct cam_ed *device, void *arg)
1838 {
1839         struct cam_eb *bus;
1840         struct cam_periph *periph;
1841         struct ccb_dev_match *cdm;
1842         dev_match_ret retval;
1843
1844         cdm = (struct ccb_dev_match *)arg;
1845         bus = device->target->bus;
1846
1847         /*
1848          * If our position is for something deeper in the tree, that means
1849          * that we've already seen this node.  So, we keep going down.
1850          */
1851         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1852          && (cdm->pos.cookie.device == device)
1853          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1854          && (cdm->pos.cookie.periph != NULL))
1855                 retval = DM_RET_DESCEND;
1856         else
1857                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1858                                         device);
1859
1860         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1861                 cdm->status = CAM_DEV_MATCH_ERROR;
1862                 return(0);
1863         }
1864
1865         /*
1866          * If the copy flag is set, copy this device out.
1867          */
1868         if (retval & DM_RET_COPY) {
1869                 int spaceleft, j;
1870
1871                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1872                         sizeof(struct dev_match_result));
1873
1874                 /*
1875                  * If we don't have enough space to put in another
1876                  * match result, save our position and tell the
1877                  * user there are more devices to check.
1878                  */
1879                 if (spaceleft < sizeof(struct dev_match_result)) {
1880                         bzero(&cdm->pos, sizeof(cdm->pos));
1881                         cdm->pos.position_type =
1882                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1883                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1884
1885                         cdm->pos.cookie.bus = device->target->bus;
1886                         cdm->pos.generations[CAM_BUS_GENERATION]=
1887                                 xsoftc.bus_generation;
1888                         cdm->pos.cookie.target = device->target;
1889                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1890                                 device->target->bus->generation;
1891                         cdm->pos.cookie.device = device;
1892                         cdm->pos.generations[CAM_DEV_GENERATION] =
1893                                 device->target->generation;
1894                         cdm->status = CAM_DEV_MATCH_MORE;
1895                         return(0);
1896                 }
1897                 j = cdm->num_matches;
1898                 cdm->num_matches++;
1899                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1900                 cdm->matches[j].result.device_result.path_id =
1901                         device->target->bus->path_id;
1902                 cdm->matches[j].result.device_result.target_id =
1903                         device->target->target_id;
1904                 cdm->matches[j].result.device_result.target_lun =
1905                         device->lun_id;
1906                 cdm->matches[j].result.device_result.protocol =
1907                         device->protocol;
1908                 bcopy(&device->inq_data,
1909                       &cdm->matches[j].result.device_result.inq_data,
1910                       sizeof(struct scsi_inquiry_data));
1911                 bcopy(&device->ident_data,
1912                       &cdm->matches[j].result.device_result.ident_data,
1913                       sizeof(struct ata_params));
1914
1915                 /* Let the user know whether this device is unconfigured */
1916                 if (device->flags & CAM_DEV_UNCONFIGURED)
1917                         cdm->matches[j].result.device_result.flags =
1918                                 DEV_RESULT_UNCONFIGURED;
1919                 else
1920                         cdm->matches[j].result.device_result.flags =
1921                                 DEV_RESULT_NOFLAG;
1922         }
1923
1924         /*
1925          * If the user isn't interested in peripherals, don't descend
1926          * the tree any further.
1927          */
1928         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1929                 return(1);
1930
1931         /*
1932          * If there is a peripheral list generation recorded, make sure
1933          * it hasn't changed.
1934          */
1935         xpt_lock_buses();
1936         mtx_lock(&bus->eb_mtx);
1937         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1938          && (cdm->pos.cookie.bus == bus)
1939          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1940          && (cdm->pos.cookie.target == device->target)
1941          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1942          && (cdm->pos.cookie.device == device)
1943          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1944          && (cdm->pos.cookie.periph != NULL)) {
1945                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1946                     device->generation) {
1947                         mtx_unlock(&bus->eb_mtx);
1948                         xpt_unlock_buses();
1949                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1950                         return(0);
1951                 }
1952                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1953                 periph->refcount++;
1954         } else
1955                 periph = NULL;
1956         mtx_unlock(&bus->eb_mtx);
1957         xpt_unlock_buses();
1958
1959         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1960 }
1961
1962 static int
1963 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1964 {
1965         struct ccb_dev_match *cdm;
1966         dev_match_ret retval;
1967
1968         cdm = (struct ccb_dev_match *)arg;
1969
1970         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1971
1972         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1973                 cdm->status = CAM_DEV_MATCH_ERROR;
1974                 return(0);
1975         }
1976
1977         /*
1978          * If the copy flag is set, copy this peripheral out.
1979          */
1980         if (retval & DM_RET_COPY) {
1981                 int spaceleft, j;
1982                 size_t l;
1983
1984                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1985                         sizeof(struct dev_match_result));
1986
1987                 /*
1988                  * If we don't have enough space to put in another
1989                  * match result, save our position and tell the
1990                  * user there are more devices to check.
1991                  */
1992                 if (spaceleft < sizeof(struct dev_match_result)) {
1993                         bzero(&cdm->pos, sizeof(cdm->pos));
1994                         cdm->pos.position_type =
1995                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1996                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1997                                 CAM_DEV_POS_PERIPH;
1998
1999                         cdm->pos.cookie.bus = periph->path->bus;
2000                         cdm->pos.generations[CAM_BUS_GENERATION]=
2001                                 xsoftc.bus_generation;
2002                         cdm->pos.cookie.target = periph->path->target;
2003                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2004                                 periph->path->bus->generation;
2005                         cdm->pos.cookie.device = periph->path->device;
2006                         cdm->pos.generations[CAM_DEV_GENERATION] =
2007                                 periph->path->target->generation;
2008                         cdm->pos.cookie.periph = periph;
2009                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2010                                 periph->path->device->generation;
2011                         cdm->status = CAM_DEV_MATCH_MORE;
2012                         return(0);
2013                 }
2014
2015                 j = cdm->num_matches;
2016                 cdm->num_matches++;
2017                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2018                 cdm->matches[j].result.periph_result.path_id =
2019                         periph->path->bus->path_id;
2020                 cdm->matches[j].result.periph_result.target_id =
2021                         periph->path->target->target_id;
2022                 cdm->matches[j].result.periph_result.target_lun =
2023                         periph->path->device->lun_id;
2024                 cdm->matches[j].result.periph_result.unit_number =
2025                         periph->unit_number;
2026                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2027                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2028                         periph->periph_name, l);
2029         }
2030
2031         return(1);
2032 }
2033
2034 static int
2035 xptedtmatch(struct ccb_dev_match *cdm)
2036 {
2037         struct cam_eb *bus;
2038         int ret;
2039
2040         cdm->num_matches = 0;
2041
2042         /*
2043          * Check the bus list generation.  If it has changed, the user
2044          * needs to reset everything and start over.
2045          */
2046         xpt_lock_buses();
2047         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2048          && (cdm->pos.cookie.bus != NULL)) {
2049                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2050                     xsoftc.bus_generation) {
2051                         xpt_unlock_buses();
2052                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2053                         return(0);
2054                 }
2055                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2056                 bus->refcount++;
2057         } else
2058                 bus = NULL;
2059         xpt_unlock_buses();
2060
2061         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2062
2063         /*
2064          * If we get back 0, that means that we had to stop before fully
2065          * traversing the EDT.  It also means that one of the subroutines
2066          * has set the status field to the proper value.  If we get back 1,
2067          * we've fully traversed the EDT and copied out any matching entries.
2068          */
2069         if (ret == 1)
2070                 cdm->status = CAM_DEV_MATCH_LAST;
2071
2072         return(ret);
2073 }
2074
2075 static int
2076 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2077 {
2078         struct cam_periph *periph;
2079         struct ccb_dev_match *cdm;
2080
2081         cdm = (struct ccb_dev_match *)arg;
2082
2083         xpt_lock_buses();
2084         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2085          && (cdm->pos.cookie.pdrv == pdrv)
2086          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2087          && (cdm->pos.cookie.periph != NULL)) {
2088                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2089                     (*pdrv)->generation) {
2090                         xpt_unlock_buses();
2091                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2092                         return(0);
2093                 }
2094                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2095                 periph->refcount++;
2096         } else
2097                 periph = NULL;
2098         xpt_unlock_buses();
2099
2100         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2101 }
2102
2103 static int
2104 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2105 {
2106         struct ccb_dev_match *cdm;
2107         dev_match_ret retval;
2108
2109         cdm = (struct ccb_dev_match *)arg;
2110
2111         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2112
2113         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2114                 cdm->status = CAM_DEV_MATCH_ERROR;
2115                 return(0);
2116         }
2117
2118         /*
2119          * If the copy flag is set, copy this peripheral out.
2120          */
2121         if (retval & DM_RET_COPY) {
2122                 int spaceleft, j;
2123                 size_t l;
2124
2125                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2126                         sizeof(struct dev_match_result));
2127
2128                 /*
2129                  * If we don't have enough space to put in another
2130                  * match result, save our position and tell the
2131                  * user there are more devices to check.
2132                  */
2133                 if (spaceleft < sizeof(struct dev_match_result)) {
2134                         struct periph_driver **pdrv;
2135
2136                         pdrv = NULL;
2137                         bzero(&cdm->pos, sizeof(cdm->pos));
2138                         cdm->pos.position_type =
2139                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2140                                 CAM_DEV_POS_PERIPH;
2141
2142                         /*
2143                          * This may look a bit non-sensical, but it is
2144                          * actually quite logical.  There are very few
2145                          * peripheral drivers, and bloating every peripheral
2146                          * structure with a pointer back to its parent
2147                          * peripheral driver linker set entry would cost
2148                          * more in the long run than doing this quick lookup.
2149                          */
2150                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2151                                 if (strcmp((*pdrv)->driver_name,
2152                                     periph->periph_name) == 0)
2153                                         break;
2154                         }
2155
2156                         if (*pdrv == NULL) {
2157                                 cdm->status = CAM_DEV_MATCH_ERROR;
2158                                 return(0);
2159                         }
2160
2161                         cdm->pos.cookie.pdrv = pdrv;
2162                         /*
2163                          * The periph generation slot does double duty, as
2164                          * does the periph pointer slot.  They are used for
2165                          * both edt and pdrv lookups and positioning.
2166                          */
2167                         cdm->pos.cookie.periph = periph;
2168                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2169                                 (*pdrv)->generation;
2170                         cdm->status = CAM_DEV_MATCH_MORE;
2171                         return(0);
2172                 }
2173
2174                 j = cdm->num_matches;
2175                 cdm->num_matches++;
2176                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2177                 cdm->matches[j].result.periph_result.path_id =
2178                         periph->path->bus->path_id;
2179
2180                 /*
2181                  * The transport layer peripheral doesn't have a target or
2182                  * lun.
2183                  */
2184                 if (periph->path->target)
2185                         cdm->matches[j].result.periph_result.target_id =
2186                                 periph->path->target->target_id;
2187                 else
2188                         cdm->matches[j].result.periph_result.target_id =
2189                                 CAM_TARGET_WILDCARD;
2190
2191                 if (periph->path->device)
2192                         cdm->matches[j].result.periph_result.target_lun =
2193                                 periph->path->device->lun_id;
2194                 else
2195                         cdm->matches[j].result.periph_result.target_lun =
2196                                 CAM_LUN_WILDCARD;
2197
2198                 cdm->matches[j].result.periph_result.unit_number =
2199                         periph->unit_number;
2200                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2201                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2202                         periph->periph_name, l);
2203         }
2204
2205         return(1);
2206 }
2207
2208 static int
2209 xptperiphlistmatch(struct ccb_dev_match *cdm)
2210 {
2211         int ret;
2212
2213         cdm->num_matches = 0;
2214
2215         /*
2216          * At this point in the edt traversal function, we check the bus
2217          * list generation to make sure that no buses have been added or
2218          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2219          * For the peripheral driver list traversal function, however, we
2220          * don't have to worry about new peripheral driver types coming or
2221          * going; they're in a linker set, and therefore can't change
2222          * without a recompile.
2223          */
2224
2225         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2226          && (cdm->pos.cookie.pdrv != NULL))
2227                 ret = xptpdrvtraverse(
2228                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2229                                 xptplistpdrvfunc, cdm);
2230         else
2231                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2232
2233         /*
2234          * If we get back 0, that means that we had to stop before fully
2235          * traversing the peripheral driver tree.  It also means that one of
2236          * the subroutines has set the status field to the proper value.  If
2237          * we get back 1, we've fully traversed the EDT and copied out any
2238          * matching entries.
2239          */
2240         if (ret == 1)
2241                 cdm->status = CAM_DEV_MATCH_LAST;
2242
2243         return(ret);
2244 }
2245
2246 static int
2247 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2248 {
2249         struct cam_eb *bus, *next_bus;
2250         int retval;
2251
2252         retval = 1;
2253         if (start_bus)
2254                 bus = start_bus;
2255         else {
2256                 xpt_lock_buses();
2257                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2258                 if (bus == NULL) {
2259                         xpt_unlock_buses();
2260                         return (retval);
2261                 }
2262                 bus->refcount++;
2263                 xpt_unlock_buses();
2264         }
2265         for (; bus != NULL; bus = next_bus) {
2266                 retval = tr_func(bus, arg);
2267                 if (retval == 0) {
2268                         xpt_release_bus(bus);
2269                         break;
2270                 }
2271                 xpt_lock_buses();
2272                 next_bus = TAILQ_NEXT(bus, links);
2273                 if (next_bus)
2274                         next_bus->refcount++;
2275                 xpt_unlock_buses();
2276                 xpt_release_bus(bus);
2277         }
2278         return(retval);
2279 }
2280
2281 static int
2282 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2283                   xpt_targetfunc_t *tr_func, void *arg)
2284 {
2285         struct cam_et *target, *next_target;
2286         int retval;
2287
2288         retval = 1;
2289         if (start_target)
2290                 target = start_target;
2291         else {
2292                 mtx_lock(&bus->eb_mtx);
2293                 target = TAILQ_FIRST(&bus->et_entries);
2294                 if (target == NULL) {
2295                         mtx_unlock(&bus->eb_mtx);
2296                         return (retval);
2297                 }
2298                 target->refcount++;
2299                 mtx_unlock(&bus->eb_mtx);
2300         }
2301         for (; target != NULL; target = next_target) {
2302                 retval = tr_func(target, arg);
2303                 if (retval == 0) {
2304                         xpt_release_target(target);
2305                         break;
2306                 }
2307                 mtx_lock(&bus->eb_mtx);
2308                 next_target = TAILQ_NEXT(target, links);
2309                 if (next_target)
2310                         next_target->refcount++;
2311                 mtx_unlock(&bus->eb_mtx);
2312                 xpt_release_target(target);
2313         }
2314         return(retval);
2315 }
2316
2317 static int
2318 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2319                   xpt_devicefunc_t *tr_func, void *arg)
2320 {
2321         struct cam_eb *bus;
2322         struct cam_ed *device, *next_device;
2323         int retval;
2324
2325         retval = 1;
2326         bus = target->bus;
2327         if (start_device)
2328                 device = start_device;
2329         else {
2330                 mtx_lock(&bus->eb_mtx);
2331                 device = TAILQ_FIRST(&target->ed_entries);
2332                 if (device == NULL) {
2333                         mtx_unlock(&bus->eb_mtx);
2334                         return (retval);
2335                 }
2336                 device->refcount++;
2337                 mtx_unlock(&bus->eb_mtx);
2338         }
2339         for (; device != NULL; device = next_device) {
2340                 mtx_lock(&device->device_mtx);
2341                 retval = tr_func(device, arg);
2342                 mtx_unlock(&device->device_mtx);
2343                 if (retval == 0) {
2344                         xpt_release_device(device);
2345                         break;
2346                 }
2347                 mtx_lock(&bus->eb_mtx);
2348                 next_device = TAILQ_NEXT(device, links);
2349                 if (next_device)
2350                         next_device->refcount++;
2351                 mtx_unlock(&bus->eb_mtx);
2352                 xpt_release_device(device);
2353         }
2354         return(retval);
2355 }
2356
2357 static int
2358 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2359                   xpt_periphfunc_t *tr_func, void *arg)
2360 {
2361         struct cam_eb *bus;
2362         struct cam_periph *periph, *next_periph;
2363         int retval;
2364
2365         retval = 1;
2366
2367         bus = device->target->bus;
2368         if (start_periph)
2369                 periph = start_periph;
2370         else {
2371                 xpt_lock_buses();
2372                 mtx_lock(&bus->eb_mtx);
2373                 periph = SLIST_FIRST(&device->periphs);
2374                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2375                         periph = SLIST_NEXT(periph, periph_links);
2376                 if (periph == NULL) {
2377                         mtx_unlock(&bus->eb_mtx);
2378                         xpt_unlock_buses();
2379                         return (retval);
2380                 }
2381                 periph->refcount++;
2382                 mtx_unlock(&bus->eb_mtx);
2383                 xpt_unlock_buses();
2384         }
2385         for (; periph != NULL; periph = next_periph) {
2386                 retval = tr_func(periph, arg);
2387                 if (retval == 0) {
2388                         cam_periph_release_locked(periph);
2389                         break;
2390                 }
2391                 xpt_lock_buses();
2392                 mtx_lock(&bus->eb_mtx);
2393                 next_periph = SLIST_NEXT(periph, periph_links);
2394                 while (next_periph != NULL &&
2395                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2396                         next_periph = SLIST_NEXT(next_periph, periph_links);
2397                 if (next_periph)
2398                         next_periph->refcount++;
2399                 mtx_unlock(&bus->eb_mtx);
2400                 xpt_unlock_buses();
2401                 cam_periph_release_locked(periph);
2402         }
2403         return(retval);
2404 }
2405
2406 static int
2407 xptpdrvtraverse(struct periph_driver **start_pdrv,
2408                 xpt_pdrvfunc_t *tr_func, void *arg)
2409 {
2410         struct periph_driver **pdrv;
2411         int retval;
2412
2413         retval = 1;
2414
2415         /*
2416          * We don't traverse the peripheral driver list like we do the
2417          * other lists, because it is a linker set, and therefore cannot be
2418          * changed during runtime.  If the peripheral driver list is ever
2419          * re-done to be something other than a linker set (i.e. it can
2420          * change while the system is running), the list traversal should
2421          * be modified to work like the other traversal functions.
2422          */
2423         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2424              *pdrv != NULL; pdrv++) {
2425                 retval = tr_func(pdrv, arg);
2426
2427                 if (retval == 0)
2428                         return(retval);
2429         }
2430
2431         return(retval);
2432 }
2433
2434 static int
2435 xptpdperiphtraverse(struct periph_driver **pdrv,
2436                     struct cam_periph *start_periph,
2437                     xpt_periphfunc_t *tr_func, void *arg)
2438 {
2439         struct cam_periph *periph, *next_periph;
2440         int retval;
2441
2442         retval = 1;
2443
2444         if (start_periph)
2445                 periph = start_periph;
2446         else {
2447                 xpt_lock_buses();
2448                 periph = TAILQ_FIRST(&(*pdrv)->units);
2449                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2450                         periph = TAILQ_NEXT(periph, unit_links);
2451                 if (periph == NULL) {
2452                         xpt_unlock_buses();
2453                         return (retval);
2454                 }
2455                 periph->refcount++;
2456                 xpt_unlock_buses();
2457         }
2458         for (; periph != NULL; periph = next_periph) {
2459                 cam_periph_lock(periph);
2460                 retval = tr_func(periph, arg);
2461                 cam_periph_unlock(periph);
2462                 if (retval == 0) {
2463                         cam_periph_release(periph);
2464                         break;
2465                 }
2466                 xpt_lock_buses();
2467                 next_periph = TAILQ_NEXT(periph, unit_links);
2468                 while (next_periph != NULL &&
2469                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2470                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2471                 if (next_periph)
2472                         next_periph->refcount++;
2473                 xpt_unlock_buses();
2474                 cam_periph_release(periph);
2475         }
2476         return(retval);
2477 }
2478
2479 static int
2480 xptdefbusfunc(struct cam_eb *bus, void *arg)
2481 {
2482         struct xpt_traverse_config *tr_config;
2483
2484         tr_config = (struct xpt_traverse_config *)arg;
2485
2486         if (tr_config->depth == XPT_DEPTH_BUS) {
2487                 xpt_busfunc_t *tr_func;
2488
2489                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2490
2491                 return(tr_func(bus, tr_config->tr_arg));
2492         } else
2493                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2494 }
2495
2496 static int
2497 xptdeftargetfunc(struct cam_et *target, void *arg)
2498 {
2499         struct xpt_traverse_config *tr_config;
2500
2501         tr_config = (struct xpt_traverse_config *)arg;
2502
2503         if (tr_config->depth == XPT_DEPTH_TARGET) {
2504                 xpt_targetfunc_t *tr_func;
2505
2506                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2507
2508                 return(tr_func(target, tr_config->tr_arg));
2509         } else
2510                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2511 }
2512
2513 static int
2514 xptdefdevicefunc(struct cam_ed *device, void *arg)
2515 {
2516         struct xpt_traverse_config *tr_config;
2517
2518         tr_config = (struct xpt_traverse_config *)arg;
2519
2520         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2521                 xpt_devicefunc_t *tr_func;
2522
2523                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2524
2525                 return(tr_func(device, tr_config->tr_arg));
2526         } else
2527                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2528 }
2529
2530 static int
2531 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2532 {
2533         struct xpt_traverse_config *tr_config;
2534         xpt_periphfunc_t *tr_func;
2535
2536         tr_config = (struct xpt_traverse_config *)arg;
2537
2538         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2539
2540         /*
2541          * Unlike the other default functions, we don't check for depth
2542          * here.  The peripheral driver level is the last level in the EDT,
2543          * so if we're here, we should execute the function in question.
2544          */
2545         return(tr_func(periph, tr_config->tr_arg));
2546 }
2547
2548 /*
2549  * Execute the given function for every bus in the EDT.
2550  */
2551 static int
2552 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2553 {
2554         struct xpt_traverse_config tr_config;
2555
2556         tr_config.depth = XPT_DEPTH_BUS;
2557         tr_config.tr_func = tr_func;
2558         tr_config.tr_arg = arg;
2559
2560         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2561 }
2562
2563 /*
2564  * Execute the given function for every device in the EDT.
2565  */
2566 static int
2567 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2568 {
2569         struct xpt_traverse_config tr_config;
2570
2571         tr_config.depth = XPT_DEPTH_DEVICE;
2572         tr_config.tr_func = tr_func;
2573         tr_config.tr_arg = arg;
2574
2575         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2576 }
2577
2578 static int
2579 xptsetasyncfunc(struct cam_ed *device, void *arg)
2580 {
2581         struct cam_path path;
2582         struct ccb_getdev cgd;
2583         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2584
2585         /*
2586          * Don't report unconfigured devices (Wildcard devs,
2587          * devices only for target mode, device instances
2588          * that have been invalidated but are waiting for
2589          * their last reference count to be released).
2590          */
2591         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2592                 return (1);
2593
2594         xpt_compile_path(&path,
2595                          NULL,
2596                          device->target->bus->path_id,
2597                          device->target->target_id,
2598                          device->lun_id);
2599         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2600         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2601         xpt_action((union ccb *)&cgd);
2602         csa->callback(csa->callback_arg,
2603                             AC_FOUND_DEVICE,
2604                             &path, &cgd);
2605         xpt_release_path(&path);
2606
2607         return(1);
2608 }
2609
2610 static int
2611 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2612 {
2613         struct cam_path path;
2614         struct ccb_pathinq cpi;
2615         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2616
2617         xpt_compile_path(&path, /*periph*/NULL,
2618                          bus->path_id,
2619                          CAM_TARGET_WILDCARD,
2620                          CAM_LUN_WILDCARD);
2621         xpt_path_lock(&path);
2622         xpt_path_inq(&cpi, &path);
2623         csa->callback(csa->callback_arg,
2624                             AC_PATH_REGISTERED,
2625                             &path, &cpi);
2626         xpt_path_unlock(&path);
2627         xpt_release_path(&path);
2628
2629         return(1);
2630 }
2631
2632 void
2633 xpt_action(union ccb *start_ccb)
2634 {
2635
2636         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2637             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2638                 xpt_action_name(start_ccb->ccb_h.func_code)));
2639
2640         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2641         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2642 }
2643
2644 void
2645 xpt_action_default(union ccb *start_ccb)
2646 {
2647         struct cam_path *path;
2648         struct cam_sim *sim;
2649         struct mtx *mtx;
2650
2651         path = start_ccb->ccb_h.path;
2652         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2653             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2654                 xpt_action_name(start_ccb->ccb_h.func_code)));
2655
2656         switch (start_ccb->ccb_h.func_code) {
2657         case XPT_SCSI_IO:
2658         {
2659                 struct cam_ed *device;
2660
2661                 /*
2662                  * For the sake of compatibility with SCSI-1
2663                  * devices that may not understand the identify
2664                  * message, we include lun information in the
2665                  * second byte of all commands.  SCSI-1 specifies
2666                  * that luns are a 3 bit value and reserves only 3
2667                  * bits for lun information in the CDB.  Later
2668                  * revisions of the SCSI spec allow for more than 8
2669                  * luns, but have deprecated lun information in the
2670                  * CDB.  So, if the lun won't fit, we must omit.
2671                  *
2672                  * Also be aware that during initial probing for devices,
2673                  * the inquiry information is unknown but initialized to 0.
2674                  * This means that this code will be exercised while probing
2675                  * devices with an ANSI revision greater than 2.
2676                  */
2677                 device = path->device;
2678                 if (device->protocol_version <= SCSI_REV_2
2679                  && start_ccb->ccb_h.target_lun < 8
2680                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2681
2682                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2683                             start_ccb->ccb_h.target_lun << 5;
2684                 }
2685                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2686         }
2687         /* FALLTHROUGH */
2688         case XPT_TARGET_IO:
2689         case XPT_CONT_TARGET_IO:
2690                 start_ccb->csio.sense_resid = 0;
2691                 start_ccb->csio.resid = 0;
2692                 /* FALLTHROUGH */
2693         case XPT_ATA_IO:
2694                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2695                         start_ccb->ataio.resid = 0;
2696                 /* FALLTHROUGH */
2697         case XPT_NVME_IO:
2698                 /* FALLTHROUGH */
2699         case XPT_NVME_ADMIN:
2700                 /* FALLTHROUGH */
2701         case XPT_MMC_IO:
2702                 /* XXX just like nmve_io? */
2703         case XPT_RESET_DEV:
2704         case XPT_ENG_EXEC:
2705         case XPT_SMP_IO:
2706         {
2707                 struct cam_devq *devq;
2708
2709                 devq = path->bus->sim->devq;
2710                 mtx_lock(&devq->send_mtx);
2711                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2712                 if (xpt_schedule_devq(devq, path->device) != 0)
2713                         xpt_run_devq(devq);
2714                 mtx_unlock(&devq->send_mtx);
2715                 break;
2716         }
2717         case XPT_CALC_GEOMETRY:
2718                 /* Filter out garbage */
2719                 if (start_ccb->ccg.block_size == 0
2720                  || start_ccb->ccg.volume_size == 0) {
2721                         start_ccb->ccg.cylinders = 0;
2722                         start_ccb->ccg.heads = 0;
2723                         start_ccb->ccg.secs_per_track = 0;
2724                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2725                         break;
2726                 }
2727 #if defined(__sparc64__)
2728                 /*
2729                  * For sparc64, we may need adjust the geometry of large
2730                  * disks in order to fit the limitations of the 16-bit
2731                  * fields of the VTOC8 disk label.
2732                  */
2733                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2734                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2735                         break;
2736                 }
2737 #endif
2738                 goto call_sim;
2739         case XPT_ABORT:
2740         {
2741                 union ccb* abort_ccb;
2742
2743                 abort_ccb = start_ccb->cab.abort_ccb;
2744                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2745                         struct cam_ed *device;
2746                         struct cam_devq *devq;
2747
2748                         device = abort_ccb->ccb_h.path->device;
2749                         devq = device->sim->devq;
2750
2751                         mtx_lock(&devq->send_mtx);
2752                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2753                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2754                                 abort_ccb->ccb_h.status =
2755                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2756                                 xpt_freeze_devq_device(device, 1);
2757                                 mtx_unlock(&devq->send_mtx);
2758                                 xpt_done(abort_ccb);
2759                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2760                                 break;
2761                         }
2762                         mtx_unlock(&devq->send_mtx);
2763
2764                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2765                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2766                                 /*
2767                                  * We've caught this ccb en route to
2768                                  * the SIM.  Flag it for abort and the
2769                                  * SIM will do so just before starting
2770                                  * real work on the CCB.
2771                                  */
2772                                 abort_ccb->ccb_h.status =
2773                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2774                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2775                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2776                                 break;
2777                         }
2778                 }
2779                 if (XPT_FC_IS_QUEUED(abort_ccb)
2780                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2781                         /*
2782                          * It's already completed but waiting
2783                          * for our SWI to get to it.
2784                          */
2785                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2786                         break;
2787                 }
2788                 /*
2789                  * If we weren't able to take care of the abort request
2790                  * in the XPT, pass the request down to the SIM for processing.
2791                  */
2792         }
2793         /* FALLTHROUGH */
2794         case XPT_ACCEPT_TARGET_IO:
2795         case XPT_EN_LUN:
2796         case XPT_IMMED_NOTIFY:
2797         case XPT_NOTIFY_ACK:
2798         case XPT_RESET_BUS:
2799         case XPT_IMMEDIATE_NOTIFY:
2800         case XPT_NOTIFY_ACKNOWLEDGE:
2801         case XPT_GET_SIM_KNOB_OLD:
2802         case XPT_GET_SIM_KNOB:
2803         case XPT_SET_SIM_KNOB:
2804         case XPT_GET_TRAN_SETTINGS:
2805         case XPT_SET_TRAN_SETTINGS:
2806         case XPT_PATH_INQ:
2807 call_sim:
2808                 sim = path->bus->sim;
2809                 mtx = sim->mtx;
2810                 if (mtx && !mtx_owned(mtx))
2811                         mtx_lock(mtx);
2812                 else
2813                         mtx = NULL;
2814
2815                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2816                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2817                 (*(sim->sim_action))(sim, start_ccb);
2818                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2819                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2820                 if (mtx)
2821                         mtx_unlock(mtx);
2822                 break;
2823         case XPT_PATH_STATS:
2824                 start_ccb->cpis.last_reset = path->bus->last_reset;
2825                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2826                 break;
2827         case XPT_GDEV_TYPE:
2828         {
2829                 struct cam_ed *dev;
2830
2831                 dev = path->device;
2832                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2833                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2834                 } else {
2835                         struct ccb_getdev *cgd;
2836
2837                         cgd = &start_ccb->cgd;
2838                         cgd->protocol = dev->protocol;
2839                         cgd->inq_data = dev->inq_data;
2840                         cgd->ident_data = dev->ident_data;
2841                         cgd->inq_flags = dev->inq_flags;
2842                         cgd->ccb_h.status = CAM_REQ_CMP;
2843                         cgd->serial_num_len = dev->serial_num_len;
2844                         if ((dev->serial_num_len > 0)
2845                          && (dev->serial_num != NULL))
2846                                 bcopy(dev->serial_num, cgd->serial_num,
2847                                       dev->serial_num_len);
2848                 }
2849                 break;
2850         }
2851         case XPT_GDEV_STATS:
2852         {
2853                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2854                 struct cam_ed *dev = path->device;
2855                 struct cam_eb *bus = path->bus;
2856                 struct cam_et *tar = path->target;
2857                 struct cam_devq *devq = bus->sim->devq;
2858
2859                 mtx_lock(&devq->send_mtx);
2860                 cgds->dev_openings = dev->ccbq.dev_openings;
2861                 cgds->dev_active = dev->ccbq.dev_active;
2862                 cgds->allocated = dev->ccbq.allocated;
2863                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2864                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2865                 cgds->last_reset = tar->last_reset;
2866                 cgds->maxtags = dev->maxtags;
2867                 cgds->mintags = dev->mintags;
2868                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2869                         cgds->last_reset = bus->last_reset;
2870                 mtx_unlock(&devq->send_mtx);
2871                 cgds->ccb_h.status = CAM_REQ_CMP;
2872                 break;
2873         }
2874         case XPT_GDEVLIST:
2875         {
2876                 struct cam_periph       *nperiph;
2877                 struct periph_list      *periph_head;
2878                 struct ccb_getdevlist   *cgdl;
2879                 u_int                   i;
2880                 struct cam_ed           *device;
2881                 int                     found;
2882
2883
2884                 found = 0;
2885
2886                 /*
2887                  * Don't want anyone mucking with our data.
2888                  */
2889                 device = path->device;
2890                 periph_head = &device->periphs;
2891                 cgdl = &start_ccb->cgdl;
2892
2893                 /*
2894                  * Check and see if the list has changed since the user
2895                  * last requested a list member.  If so, tell them that the
2896                  * list has changed, and therefore they need to start over
2897                  * from the beginning.
2898                  */
2899                 if ((cgdl->index != 0) &&
2900                     (cgdl->generation != device->generation)) {
2901                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2902                         break;
2903                 }
2904
2905                 /*
2906                  * Traverse the list of peripherals and attempt to find
2907                  * the requested peripheral.
2908                  */
2909                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2910                      (nperiph != NULL) && (i <= cgdl->index);
2911                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2912                         if (i == cgdl->index) {
2913                                 strlcpy(cgdl->periph_name,
2914                                         nperiph->periph_name,
2915                                         sizeof(cgdl->periph_name));
2916                                 cgdl->unit_number = nperiph->unit_number;
2917                                 found = 1;
2918                         }
2919                 }
2920                 if (found == 0) {
2921                         cgdl->status = CAM_GDEVLIST_ERROR;
2922                         break;
2923                 }
2924
2925                 if (nperiph == NULL)
2926                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2927                 else
2928                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2929
2930                 cgdl->index++;
2931                 cgdl->generation = device->generation;
2932
2933                 cgdl->ccb_h.status = CAM_REQ_CMP;
2934                 break;
2935         }
2936         case XPT_DEV_MATCH:
2937         {
2938                 dev_pos_type position_type;
2939                 struct ccb_dev_match *cdm;
2940
2941                 cdm = &start_ccb->cdm;
2942
2943                 /*
2944                  * There are two ways of getting at information in the EDT.
2945                  * The first way is via the primary EDT tree.  It starts
2946                  * with a list of buses, then a list of targets on a bus,
2947                  * then devices/luns on a target, and then peripherals on a
2948                  * device/lun.  The "other" way is by the peripheral driver
2949                  * lists.  The peripheral driver lists are organized by
2950                  * peripheral driver.  (obviously)  So it makes sense to
2951                  * use the peripheral driver list if the user is looking
2952                  * for something like "da1", or all "da" devices.  If the
2953                  * user is looking for something on a particular bus/target
2954                  * or lun, it's generally better to go through the EDT tree.
2955                  */
2956
2957                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2958                         position_type = cdm->pos.position_type;
2959                 else {
2960                         u_int i;
2961
2962                         position_type = CAM_DEV_POS_NONE;
2963
2964                         for (i = 0; i < cdm->num_patterns; i++) {
2965                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2966                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2967                                         position_type = CAM_DEV_POS_EDT;
2968                                         break;
2969                                 }
2970                         }
2971
2972                         if (cdm->num_patterns == 0)
2973                                 position_type = CAM_DEV_POS_EDT;
2974                         else if (position_type == CAM_DEV_POS_NONE)
2975                                 position_type = CAM_DEV_POS_PDRV;
2976                 }
2977
2978                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2979                 case CAM_DEV_POS_EDT:
2980                         xptedtmatch(cdm);
2981                         break;
2982                 case CAM_DEV_POS_PDRV:
2983                         xptperiphlistmatch(cdm);
2984                         break;
2985                 default:
2986                         cdm->status = CAM_DEV_MATCH_ERROR;
2987                         break;
2988                 }
2989
2990                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2991                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2992                 else
2993                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2994
2995                 break;
2996         }
2997         case XPT_SASYNC_CB:
2998         {
2999                 struct ccb_setasync *csa;
3000                 struct async_node *cur_entry;
3001                 struct async_list *async_head;
3002                 u_int32_t added;
3003
3004                 csa = &start_ccb->csa;
3005                 added = csa->event_enable;
3006                 async_head = &path->device->asyncs;
3007
3008                 /*
3009                  * If there is already an entry for us, simply
3010                  * update it.
3011                  */
3012                 cur_entry = SLIST_FIRST(async_head);
3013                 while (cur_entry != NULL) {
3014                         if ((cur_entry->callback_arg == csa->callback_arg)
3015                          && (cur_entry->callback == csa->callback))
3016                                 break;
3017                         cur_entry = SLIST_NEXT(cur_entry, links);
3018                 }
3019
3020                 if (cur_entry != NULL) {
3021                         /*
3022                          * If the request has no flags set,
3023                          * remove the entry.
3024                          */
3025                         added &= ~cur_entry->event_enable;
3026                         if (csa->event_enable == 0) {
3027                                 SLIST_REMOVE(async_head, cur_entry,
3028                                              async_node, links);
3029                                 xpt_release_device(path->device);
3030                                 free(cur_entry, M_CAMXPT);
3031                         } else {
3032                                 cur_entry->event_enable = csa->event_enable;
3033                         }
3034                         csa->event_enable = added;
3035                 } else {
3036                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3037                                            M_NOWAIT);
3038                         if (cur_entry == NULL) {
3039                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3040                                 break;
3041                         }
3042                         cur_entry->event_enable = csa->event_enable;
3043                         cur_entry->event_lock = (path->bus->sim->mtx &&
3044                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3045                         cur_entry->callback_arg = csa->callback_arg;
3046                         cur_entry->callback = csa->callback;
3047                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3048                         xpt_acquire_device(path->device);
3049                 }
3050                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3051                 break;
3052         }
3053         case XPT_REL_SIMQ:
3054         {
3055                 struct ccb_relsim *crs;
3056                 struct cam_ed *dev;
3057
3058                 crs = &start_ccb->crs;
3059                 dev = path->device;
3060                 if (dev == NULL) {
3061
3062                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3063                         break;
3064                 }
3065
3066                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3067
3068                         /* Don't ever go below one opening */
3069                         if (crs->openings > 0) {
3070                                 xpt_dev_ccbq_resize(path, crs->openings);
3071                                 if (bootverbose) {
3072                                         xpt_print(path,
3073                                             "number of openings is now %d\n",
3074                                             crs->openings);
3075                                 }
3076                         }
3077                 }
3078
3079                 mtx_lock(&dev->sim->devq->send_mtx);
3080                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3081
3082                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3083
3084                                 /*
3085                                  * Just extend the old timeout and decrement
3086                                  * the freeze count so that a single timeout
3087                                  * is sufficient for releasing the queue.
3088                                  */
3089                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3090                                 callout_stop(&dev->callout);
3091                         } else {
3092
3093                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3094                         }
3095
3096                         callout_reset_sbt(&dev->callout,
3097                             SBT_1MS * crs->release_timeout, 0,
3098                             xpt_release_devq_timeout, dev, 0);
3099
3100                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3101
3102                 }
3103
3104                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3105
3106                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3107                                 /*
3108                                  * Decrement the freeze count so that a single
3109                                  * completion is still sufficient to unfreeze
3110                                  * the queue.
3111                                  */
3112                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3113                         } else {
3114
3115                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3116                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3117                         }
3118                 }
3119
3120                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3121
3122                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3123                          || (dev->ccbq.dev_active == 0)) {
3124
3125                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3126                         } else {
3127
3128                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3129                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3130                         }
3131                 }
3132                 mtx_unlock(&dev->sim->devq->send_mtx);
3133
3134                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3135                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3136                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3137                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3138                 break;
3139         }
3140         case XPT_DEBUG: {
3141                 struct cam_path *oldpath;
3142
3143                 /* Check that all request bits are supported. */
3144                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3145                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3146                         break;
3147                 }
3148
3149                 cam_dflags = CAM_DEBUG_NONE;
3150                 if (cam_dpath != NULL) {
3151                         oldpath = cam_dpath;
3152                         cam_dpath = NULL;
3153                         xpt_free_path(oldpath);
3154                 }
3155                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3156                         if (xpt_create_path(&cam_dpath, NULL,
3157                                             start_ccb->ccb_h.path_id,
3158                                             start_ccb->ccb_h.target_id,
3159                                             start_ccb->ccb_h.target_lun) !=
3160                                             CAM_REQ_CMP) {
3161                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3162                         } else {
3163                                 cam_dflags = start_ccb->cdbg.flags;
3164                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3165                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3166                                     cam_dflags);
3167                         }
3168                 } else
3169                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3170                 break;
3171         }
3172         case XPT_NOOP:
3173                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3174                         xpt_freeze_devq(path, 1);
3175                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3176                 break;
3177         case XPT_REPROBE_LUN:
3178                 xpt_async(AC_INQ_CHANGED, path, NULL);
3179                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3180                 xpt_done(start_ccb);
3181                 break;
3182         case XPT_ASYNC:
3183                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3184                 xpt_done(start_ccb);
3185                 break;
3186         default:
3187         case XPT_SDEV_TYPE:
3188         case XPT_TERM_IO:
3189         case XPT_ENG_INQ:
3190                 /* XXX Implement */
3191                 xpt_print(start_ccb->ccb_h.path,
3192                     "%s: CCB type %#x %s not supported\n", __func__,
3193                     start_ccb->ccb_h.func_code,
3194                     xpt_action_name(start_ccb->ccb_h.func_code));
3195                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3196                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3197                         xpt_done(start_ccb);
3198                 }
3199                 break;
3200         }
3201         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3202             ("xpt_action_default: func= %#x %s status %#x\n",
3203                 start_ccb->ccb_h.func_code,
3204                 xpt_action_name(start_ccb->ccb_h.func_code),
3205                 start_ccb->ccb_h.status));
3206 }
3207
3208 /*
3209  * Call the sim poll routine to allow the sim to complete
3210  * any inflight requests, then call camisr_runqueue to
3211  * complete any CCB that the polling completed.
3212  */
3213 void
3214 xpt_sim_poll(struct cam_sim *sim)
3215 {
3216         struct mtx *mtx;
3217
3218         mtx = sim->mtx;
3219         if (mtx)
3220                 mtx_lock(mtx);
3221         (*(sim->sim_poll))(sim);
3222         if (mtx)
3223                 mtx_unlock(mtx);
3224         camisr_runqueue();
3225 }
3226
3227 uint32_t
3228 xpt_poll_setup(union ccb *start_ccb)
3229 {
3230         u_int32_t timeout;
3231         struct    cam_sim *sim;
3232         struct    cam_devq *devq;
3233         struct    cam_ed *dev;
3234
3235         timeout = start_ccb->ccb_h.timeout * 10;
3236         sim = start_ccb->ccb_h.path->bus->sim;
3237         devq = sim->devq;
3238         dev = start_ccb->ccb_h.path->device;
3239
3240         /*
3241          * Steal an opening so that no other queued requests
3242          * can get it before us while we simulate interrupts.
3243          */
3244         mtx_lock(&devq->send_mtx);
3245         dev->ccbq.dev_openings--;
3246         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3247             (--timeout > 0)) {
3248                 mtx_unlock(&devq->send_mtx);
3249                 DELAY(100);
3250                 xpt_sim_poll(sim);
3251                 mtx_lock(&devq->send_mtx);
3252         }
3253         dev->ccbq.dev_openings++;
3254         mtx_unlock(&devq->send_mtx);
3255
3256         return (timeout);
3257 }
3258
3259 void
3260 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3261 {
3262
3263         while (--timeout > 0) {
3264                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3265                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3266                     != CAM_REQ_INPROG)
3267                         break;
3268                 DELAY(100);
3269         }
3270
3271         if (timeout == 0) {
3272                 /*
3273                  * XXX Is it worth adding a sim_timeout entry
3274                  * point so we can attempt recovery?  If
3275                  * this is only used for dumps, I don't think
3276                  * it is.
3277                  */
3278                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3279         }
3280 }
3281
3282 void
3283 xpt_polled_action(union ccb *start_ccb)
3284 {
3285         uint32_t        timeout;
3286         struct cam_ed   *dev;
3287
3288         timeout = start_ccb->ccb_h.timeout * 10;
3289         dev = start_ccb->ccb_h.path->device;
3290
3291         mtx_unlock(&dev->device_mtx);
3292
3293         timeout = xpt_poll_setup(start_ccb);
3294         if (timeout > 0) {
3295                 xpt_action(start_ccb);
3296                 xpt_pollwait(start_ccb, timeout);
3297         } else {
3298                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3299         }
3300
3301         mtx_lock(&dev->device_mtx);
3302 }
3303
3304 /*
3305  * Schedule a peripheral driver to receive a ccb when its
3306  * target device has space for more transactions.
3307  */
3308 void
3309 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3310 {
3311
3312         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3313         cam_periph_assert(periph, MA_OWNED);
3314         if (new_priority < periph->scheduled_priority) {
3315                 periph->scheduled_priority = new_priority;
3316                 xpt_run_allocq(periph, 0);
3317         }
3318 }
3319
3320
3321 /*
3322  * Schedule a device to run on a given queue.
3323  * If the device was inserted as a new entry on the queue,
3324  * return 1 meaning the device queue should be run. If we
3325  * were already queued, implying someone else has already
3326  * started the queue, return 0 so the caller doesn't attempt
3327  * to run the queue.
3328  */
3329 static int
3330 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3331                  u_int32_t new_priority)
3332 {
3333         int retval;
3334         u_int32_t old_priority;
3335
3336         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3337
3338
3339         old_priority = pinfo->priority;
3340
3341         /*
3342          * Are we already queued?
3343          */
3344         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3345                 /* Simply reorder based on new priority */
3346                 if (new_priority < old_priority) {
3347                         camq_change_priority(queue, pinfo->index,
3348                                              new_priority);
3349                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3350                                         ("changed priority to %d\n",
3351                                          new_priority));
3352                         retval = 1;
3353                 } else
3354                         retval = 0;
3355         } else {
3356                 /* New entry on the queue */
3357                 if (new_priority < old_priority)
3358                         pinfo->priority = new_priority;
3359
3360                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3361                                 ("Inserting onto queue\n"));
3362                 pinfo->generation = ++queue->generation;
3363                 camq_insert(queue, pinfo);
3364                 retval = 1;
3365         }
3366         return (retval);
3367 }
3368
3369 static void
3370 xpt_run_allocq_task(void *context, int pending)
3371 {
3372         struct cam_periph *periph = context;
3373
3374         cam_periph_lock(periph);
3375         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3376         xpt_run_allocq(periph, 1);
3377         cam_periph_unlock(periph);
3378         cam_periph_release(periph);
3379 }
3380
3381 static void
3382 xpt_run_allocq(struct cam_periph *periph, int sleep)
3383 {
3384         struct cam_ed   *device;
3385         union ccb       *ccb;
3386         uint32_t         prio;
3387
3388         cam_periph_assert(periph, MA_OWNED);
3389         if (periph->periph_allocating)
3390                 return;
3391         cam_periph_doacquire(periph);
3392         periph->periph_allocating = 1;
3393         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3394         device = periph->path->device;
3395         ccb = NULL;
3396 restart:
3397         while ((prio = min(periph->scheduled_priority,
3398             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3399             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3400              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3401
3402                 if (ccb == NULL &&
3403                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3404                         if (sleep) {
3405                                 ccb = xpt_get_ccb(periph);
3406                                 goto restart;
3407                         }
3408                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3409                                 break;
3410                         cam_periph_doacquire(periph);
3411                         periph->flags |= CAM_PERIPH_RUN_TASK;
3412                         taskqueue_enqueue(xsoftc.xpt_taskq,
3413                             &periph->periph_run_task);
3414                         break;
3415                 }
3416                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3417                 if (prio == periph->immediate_priority) {
3418                         periph->immediate_priority = CAM_PRIORITY_NONE;
3419                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3420                                         ("waking cam_periph_getccb()\n"));
3421                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3422                                           periph_links.sle);
3423                         wakeup(&periph->ccb_list);
3424                 } else {
3425                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3426                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3427                                         ("calling periph_start()\n"));
3428                         periph->periph_start(periph, ccb);
3429                 }
3430                 ccb = NULL;
3431         }
3432         if (ccb != NULL)
3433                 xpt_release_ccb(ccb);
3434         periph->periph_allocating = 0;
3435         cam_periph_release_locked(periph);
3436 }
3437
3438 static void
3439 xpt_run_devq(struct cam_devq *devq)
3440 {
3441         struct mtx *mtx;
3442
3443         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3444
3445         devq->send_queue.qfrozen_cnt++;
3446         while ((devq->send_queue.entries > 0)
3447             && (devq->send_openings > 0)
3448             && (devq->send_queue.qfrozen_cnt <= 1)) {
3449                 struct  cam_ed *device;
3450                 union ccb *work_ccb;
3451                 struct  cam_sim *sim;
3452                 struct xpt_proto *proto;
3453
3454                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3455                                                            CAMQ_HEAD);
3456                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3457                                 ("running device %p\n", device));
3458
3459                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3460                 if (work_ccb == NULL) {
3461                         printf("device on run queue with no ccbs???\n");
3462                         continue;
3463                 }
3464
3465                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3466
3467                         mtx_lock(&xsoftc.xpt_highpower_lock);
3468                         if (xsoftc.num_highpower <= 0) {
3469                                 /*
3470                                  * We got a high power command, but we
3471                                  * don't have any available slots.  Freeze
3472                                  * the device queue until we have a slot
3473                                  * available.
3474                                  */
3475                                 xpt_freeze_devq_device(device, 1);
3476                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3477                                                    highpowerq_entry);
3478
3479                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3480                                 continue;
3481                         } else {
3482                                 /*
3483                                  * Consume a high power slot while
3484                                  * this ccb runs.
3485                                  */
3486                                 xsoftc.num_highpower--;
3487                         }
3488                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3489                 }
3490                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3491                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3492                 devq->send_openings--;
3493                 devq->send_active++;
3494                 xpt_schedule_devq(devq, device);
3495                 mtx_unlock(&devq->send_mtx);
3496
3497                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3498                         /*
3499                          * The client wants to freeze the queue
3500                          * after this CCB is sent.
3501                          */
3502                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3503                 }
3504
3505                 /* In Target mode, the peripheral driver knows best... */
3506                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3507                         if ((device->inq_flags & SID_CmdQue) != 0
3508                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3509                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3510                         else
3511                                 /*
3512                                  * Clear this in case of a retried CCB that
3513                                  * failed due to a rejected tag.
3514                                  */
3515                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3516                 }
3517
3518                 KASSERT(device == work_ccb->ccb_h.path->device,
3519                     ("device (%p) / path->device (%p) mismatch",
3520                         device, work_ccb->ccb_h.path->device));
3521                 proto = xpt_proto_find(device->protocol);
3522                 if (proto && proto->ops->debug_out)
3523                         proto->ops->debug_out(work_ccb);
3524
3525                 /*
3526                  * Device queues can be shared among multiple SIM instances
3527                  * that reside on different buses.  Use the SIM from the
3528                  * queued device, rather than the one from the calling bus.
3529                  */
3530                 sim = device->sim;
3531                 mtx = sim->mtx;
3532                 if (mtx && !mtx_owned(mtx))
3533                         mtx_lock(mtx);
3534                 else
3535                         mtx = NULL;
3536                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3537                 (*(sim->sim_action))(sim, work_ccb);
3538                 if (mtx)
3539                         mtx_unlock(mtx);
3540                 mtx_lock(&devq->send_mtx);
3541         }
3542         devq->send_queue.qfrozen_cnt--;
3543 }
3544
3545 /*
3546  * This function merges stuff from the slave ccb into the master ccb, while
3547  * keeping important fields in the master ccb constant.
3548  */
3549 void
3550 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3551 {
3552
3553         /*
3554          * Pull fields that are valid for peripheral drivers to set
3555          * into the master CCB along with the CCB "payload".
3556          */
3557         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3558         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3559         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3560         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3561         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3562               sizeof(union ccb) - sizeof(struct ccb_hdr));
3563 }
3564
3565 void
3566 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3567                     u_int32_t priority, u_int32_t flags)
3568 {
3569
3570         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3571         ccb_h->pinfo.priority = priority;
3572         ccb_h->path = path;
3573         ccb_h->path_id = path->bus->path_id;
3574         if (path->target)
3575                 ccb_h->target_id = path->target->target_id;
3576         else
3577                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3578         if (path->device) {
3579                 ccb_h->target_lun = path->device->lun_id;
3580                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3581         } else {
3582                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3583         }
3584         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3585         ccb_h->flags = flags;
3586         ccb_h->xflags = 0;
3587 }
3588
3589 void
3590 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3591 {
3592         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3593 }
3594
3595 /* Path manipulation functions */
3596 cam_status
3597 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3598                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3599 {
3600         struct     cam_path *path;
3601         cam_status status;
3602
3603         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3604
3605         if (path == NULL) {
3606                 status = CAM_RESRC_UNAVAIL;
3607                 return(status);
3608         }
3609         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3610         if (status != CAM_REQ_CMP) {
3611                 free(path, M_CAMPATH);
3612                 path = NULL;
3613         }
3614         *new_path_ptr = path;
3615         return (status);
3616 }
3617
3618 cam_status
3619 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3620                          struct cam_periph *periph, path_id_t path_id,
3621                          target_id_t target_id, lun_id_t lun_id)
3622 {
3623
3624         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3625             lun_id));
3626 }
3627
3628 cam_status
3629 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3630                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3631 {
3632         struct       cam_eb *bus;
3633         struct       cam_et *target;
3634         struct       cam_ed *device;
3635         cam_status   status;
3636
3637         status = CAM_REQ_CMP;   /* Completed without error */
3638         target = NULL;          /* Wildcarded */
3639         device = NULL;          /* Wildcarded */
3640
3641         /*
3642          * We will potentially modify the EDT, so block interrupts
3643          * that may attempt to create cam paths.
3644          */
3645         bus = xpt_find_bus(path_id);
3646         if (bus == NULL) {
3647                 status = CAM_PATH_INVALID;
3648         } else {
3649                 xpt_lock_buses();
3650                 mtx_lock(&bus->eb_mtx);
3651                 target = xpt_find_target(bus, target_id);
3652                 if (target == NULL) {
3653                         /* Create one */
3654                         struct cam_et *new_target;
3655
3656                         new_target = xpt_alloc_target(bus, target_id);
3657                         if (new_target == NULL) {
3658                                 status = CAM_RESRC_UNAVAIL;
3659                         } else {
3660                                 target = new_target;
3661                         }
3662                 }
3663                 xpt_unlock_buses();
3664                 if (target != NULL) {
3665                         device = xpt_find_device(target, lun_id);
3666                         if (device == NULL) {
3667                                 /* Create one */
3668                                 struct cam_ed *new_device;
3669
3670                                 new_device =
3671                                     (*(bus->xport->ops->alloc_device))(bus,
3672                                                                        target,
3673                                                                        lun_id);
3674                                 if (new_device == NULL) {
3675                                         status = CAM_RESRC_UNAVAIL;
3676                                 } else {
3677                                         device = new_device;
3678                                 }
3679                         }
3680                 }
3681                 mtx_unlock(&bus->eb_mtx);
3682         }
3683
3684         /*
3685          * Only touch the user's data if we are successful.
3686          */
3687         if (status == CAM_REQ_CMP) {
3688                 new_path->periph = perph;
3689                 new_path->bus = bus;
3690                 new_path->target = target;
3691                 new_path->device = device;
3692                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3693         } else {
3694                 if (device != NULL)
3695                         xpt_release_device(device);
3696                 if (target != NULL)
3697                         xpt_release_target(target);
3698                 if (bus != NULL)
3699                         xpt_release_bus(bus);
3700         }
3701         return (status);
3702 }
3703
3704 cam_status
3705 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3706 {
3707         struct     cam_path *new_path;
3708
3709         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3710         if (new_path == NULL)
3711                 return(CAM_RESRC_UNAVAIL);
3712         *new_path = *path;
3713         if (path->bus != NULL)
3714                 xpt_acquire_bus(path->bus);
3715         if (path->target != NULL)
3716                 xpt_acquire_target(path->target);
3717         if (path->device != NULL)
3718                 xpt_acquire_device(path->device);
3719         *new_path_ptr = new_path;
3720         return (CAM_REQ_CMP);
3721 }
3722
3723 void
3724 xpt_release_path(struct cam_path *path)
3725 {
3726         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3727         if (path->device != NULL) {
3728                 xpt_release_device(path->device);
3729                 path->device = NULL;
3730         }
3731         if (path->target != NULL) {
3732                 xpt_release_target(path->target);
3733                 path->target = NULL;
3734         }
3735         if (path->bus != NULL) {
3736                 xpt_release_bus(path->bus);
3737                 path->bus = NULL;
3738         }
3739 }
3740
3741 void
3742 xpt_free_path(struct cam_path *path)
3743 {
3744
3745         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3746         xpt_release_path(path);
3747         free(path, M_CAMPATH);
3748 }
3749
3750 void
3751 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3752     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3753 {
3754
3755         xpt_lock_buses();
3756         if (bus_ref) {
3757                 if (path->bus)
3758                         *bus_ref = path->bus->refcount;
3759                 else
3760                         *bus_ref = 0;
3761         }
3762         if (periph_ref) {
3763                 if (path->periph)
3764                         *periph_ref = path->periph->refcount;
3765                 else
3766                         *periph_ref = 0;
3767         }
3768         xpt_unlock_buses();
3769         if (target_ref) {
3770                 if (path->target)
3771                         *target_ref = path->target->refcount;
3772                 else
3773                         *target_ref = 0;
3774         }
3775         if (device_ref) {
3776                 if (path->device)
3777                         *device_ref = path->device->refcount;
3778                 else
3779                         *device_ref = 0;
3780         }
3781 }
3782
3783 /*
3784  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3785  * in path1, 2 for match with wildcards in path2.
3786  */
3787 int
3788 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3789 {
3790         int retval = 0;
3791
3792         if (path1->bus != path2->bus) {
3793                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3794                         retval = 1;
3795                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3796                         retval = 2;
3797                 else
3798                         return (-1);
3799         }
3800         if (path1->target != path2->target) {
3801                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3802                         if (retval == 0)
3803                                 retval = 1;
3804                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3805                         retval = 2;
3806                 else
3807                         return (-1);
3808         }
3809         if (path1->device != path2->device) {
3810                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3811                         if (retval == 0)
3812                                 retval = 1;
3813                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3814                         retval = 2;
3815                 else
3816                         return (-1);
3817         }
3818         return (retval);
3819 }
3820
3821 int
3822 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3823 {
3824         int retval = 0;
3825
3826         if (path->bus != dev->target->bus) {
3827                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3828                         retval = 1;
3829                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3830                         retval = 2;
3831                 else
3832                         return (-1);
3833         }
3834         if (path->target != dev->target) {
3835                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3836                         if (retval == 0)
3837                                 retval = 1;
3838                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3839                         retval = 2;
3840                 else
3841                         return (-1);
3842         }
3843         if (path->device != dev) {
3844                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3845                         if (retval == 0)
3846                                 retval = 1;
3847                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3848                         retval = 2;
3849                 else
3850                         return (-1);
3851         }
3852         return (retval);
3853 }
3854
3855 void
3856 xpt_print_path(struct cam_path *path)
3857 {
3858         struct sbuf sb;
3859         char buffer[XPT_PRINT_LEN];
3860
3861         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3862         xpt_path_sbuf(path, &sb);
3863         sbuf_finish(&sb);
3864         printf("%s", sbuf_data(&sb));
3865         sbuf_delete(&sb);
3866 }
3867
3868 void
3869 xpt_print_device(struct cam_ed *device)
3870 {
3871
3872         if (device == NULL)
3873                 printf("(nopath): ");
3874         else {
3875                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3876                        device->sim->unit_number,
3877                        device->sim->bus_id,
3878                        device->target->target_id,
3879                        (uintmax_t)device->lun_id);
3880         }
3881 }
3882
3883 void
3884 xpt_print(struct cam_path *path, const char *fmt, ...)
3885 {
3886         va_list ap;
3887         struct sbuf sb;
3888         char buffer[XPT_PRINT_LEN];
3889
3890         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3891
3892         xpt_path_sbuf(path, &sb);
3893         va_start(ap, fmt);
3894         sbuf_vprintf(&sb, fmt, ap);
3895         va_end(ap);
3896
3897         sbuf_finish(&sb);
3898         printf("%s", sbuf_data(&sb));
3899         sbuf_delete(&sb);
3900 }
3901
3902 int
3903 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3904 {
3905         struct sbuf sb;
3906         int len;
3907
3908         sbuf_new(&sb, str, str_len, 0);
3909         len = xpt_path_sbuf(path, &sb);
3910         sbuf_finish(&sb);
3911         return (len);
3912 }
3913
3914 int
3915 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3916 {
3917
3918         if (path == NULL)
3919                 sbuf_printf(sb, "(nopath): ");
3920         else {
3921                 if (path->periph != NULL)
3922                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3923                                     path->periph->unit_number);
3924                 else
3925                         sbuf_printf(sb, "(noperiph:");
3926
3927                 if (path->bus != NULL)
3928                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3929                                     path->bus->sim->unit_number,
3930                                     path->bus->sim->bus_id);
3931                 else
3932                         sbuf_printf(sb, "nobus:");
3933
3934                 if (path->target != NULL)
3935                         sbuf_printf(sb, "%d:", path->target->target_id);
3936                 else
3937                         sbuf_printf(sb, "X:");
3938
3939                 if (path->device != NULL)
3940                         sbuf_printf(sb, "%jx): ",
3941                             (uintmax_t)path->device->lun_id);
3942                 else
3943                         sbuf_printf(sb, "X): ");
3944         }
3945
3946         return(sbuf_len(sb));
3947 }
3948
3949 path_id_t
3950 xpt_path_path_id(struct cam_path *path)
3951 {
3952         return(path->bus->path_id);
3953 }
3954
3955 target_id_t
3956 xpt_path_target_id(struct cam_path *path)
3957 {
3958         if (path->target != NULL)
3959                 return (path->target->target_id);
3960         else
3961                 return (CAM_TARGET_WILDCARD);
3962 }
3963
3964 lun_id_t
3965 xpt_path_lun_id(struct cam_path *path)
3966 {
3967         if (path->device != NULL)
3968                 return (path->device->lun_id);
3969         else
3970                 return (CAM_LUN_WILDCARD);
3971 }
3972
3973 struct cam_sim *
3974 xpt_path_sim(struct cam_path *path)
3975 {
3976
3977         return (path->bus->sim);
3978 }
3979
3980 struct cam_periph*
3981 xpt_path_periph(struct cam_path *path)
3982 {
3983
3984         return (path->periph);
3985 }
3986
3987 /*
3988  * Release a CAM control block for the caller.  Remit the cost of the structure
3989  * to the device referenced by the path.  If the this device had no 'credits'
3990  * and peripheral drivers have registered async callbacks for this notification
3991  * call them now.
3992  */
3993 void
3994 xpt_release_ccb(union ccb *free_ccb)
3995 {
3996         struct   cam_ed *device;
3997         struct   cam_periph *periph;
3998
3999         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4000         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
4001         device = free_ccb->ccb_h.path->device;
4002         periph = free_ccb->ccb_h.path->periph;
4003
4004         xpt_free_ccb(free_ccb);
4005         periph->periph_allocated--;
4006         cam_ccbq_release_opening(&device->ccbq);
4007         xpt_run_allocq(periph, 0);
4008 }
4009
4010 /* Functions accessed by SIM drivers */
4011
4012 static struct xpt_xport_ops xport_default_ops = {
4013         .alloc_device = xpt_alloc_device_default,
4014         .action = xpt_action_default,
4015         .async = xpt_dev_async_default,
4016 };
4017 static struct xpt_xport xport_default = {
4018         .xport = XPORT_UNKNOWN,
4019         .name = "unknown",
4020         .ops = &xport_default_ops,
4021 };
4022
4023 CAM_XPT_XPORT(xport_default);
4024
4025 /*
4026  * A sim structure, listing the SIM entry points and instance
4027  * identification info is passed to xpt_bus_register to hook the SIM
4028  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4029  * for this new bus and places it in the array of buses and assigns
4030  * it a path_id.  The path_id may be influenced by "hard wiring"
4031  * information specified by the user.  Once interrupt services are
4032  * available, the bus will be probed.
4033  */
4034 int32_t
4035 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4036 {
4037         struct cam_eb *new_bus;
4038         struct cam_eb *old_bus;
4039         struct ccb_pathinq cpi;
4040         struct cam_path *path;
4041         cam_status status;
4042
4043         sim->bus_id = bus;
4044         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4045                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4046         if (new_bus == NULL) {
4047                 /* Couldn't satisfy request */
4048                 return (CAM_RESRC_UNAVAIL);
4049         }
4050
4051         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4052         TAILQ_INIT(&new_bus->et_entries);
4053         cam_sim_hold(sim);
4054         new_bus->sim = sim;
4055         timevalclear(&new_bus->last_reset);
4056         new_bus->flags = 0;
4057         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4058         new_bus->generation = 0;
4059
4060         xpt_lock_buses();
4061         sim->path_id = new_bus->path_id =
4062             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4063         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4064         while (old_bus != NULL
4065             && old_bus->path_id < new_bus->path_id)
4066                 old_bus = TAILQ_NEXT(old_bus, links);
4067         if (old_bus != NULL)
4068                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4069         else
4070                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4071         xsoftc.bus_generation++;
4072         xpt_unlock_buses();
4073
4074         /*
4075          * Set a default transport so that a PATH_INQ can be issued to
4076          * the SIM.  This will then allow for probing and attaching of
4077          * a more appropriate transport.
4078          */
4079         new_bus->xport = &xport_default;
4080
4081         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4082                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4083         if (status != CAM_REQ_CMP) {
4084                 xpt_release_bus(new_bus);
4085                 return (CAM_RESRC_UNAVAIL);
4086         }
4087
4088         xpt_path_inq(&cpi, path);
4089
4090         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4091                 struct xpt_xport **xpt;
4092
4093                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4094                         if ((*xpt)->xport == cpi.transport) {
4095                                 new_bus->xport = *xpt;
4096                                 break;
4097                         }
4098                 }
4099                 if (new_bus->xport == NULL) {
4100                         xpt_print(path,
4101                             "No transport found for %d\n", cpi.transport);
4102                         xpt_release_bus(new_bus);
4103                         free(path, M_CAMXPT);
4104                         return (CAM_RESRC_UNAVAIL);
4105                 }
4106         }
4107
4108         /* Notify interested parties */
4109         if (sim->path_id != CAM_XPT_PATH_ID) {
4110
4111                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4112                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4113                         union   ccb *scan_ccb;
4114
4115                         /* Initiate bus rescan. */
4116                         scan_ccb = xpt_alloc_ccb_nowait();
4117                         if (scan_ccb != NULL) {
4118                                 scan_ccb->ccb_h.path = path;
4119                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4120                                 scan_ccb->crcn.flags = 0;
4121                                 xpt_rescan(scan_ccb);
4122                         } else {
4123                                 xpt_print(path,
4124                                           "Can't allocate CCB to scan bus\n");
4125                                 xpt_free_path(path);
4126                         }
4127                 } else
4128                         xpt_free_path(path);
4129         } else
4130                 xpt_free_path(path);
4131         return (CAM_SUCCESS);
4132 }
4133
4134 int32_t
4135 xpt_bus_deregister(path_id_t pathid)
4136 {
4137         struct cam_path bus_path;
4138         cam_status status;
4139
4140         status = xpt_compile_path(&bus_path, NULL, pathid,
4141                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4142         if (status != CAM_REQ_CMP)
4143                 return (status);
4144
4145         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4146         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4147
4148         /* Release the reference count held while registered. */
4149         xpt_release_bus(bus_path.bus);
4150         xpt_release_path(&bus_path);
4151
4152         return (CAM_REQ_CMP);
4153 }
4154
4155 static path_id_t
4156 xptnextfreepathid(void)
4157 {
4158         struct cam_eb *bus;
4159         path_id_t pathid;
4160         const char *strval;
4161
4162         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4163         pathid = 0;
4164         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4165 retry:
4166         /* Find an unoccupied pathid */
4167         while (bus != NULL && bus->path_id <= pathid) {
4168                 if (bus->path_id == pathid)
4169                         pathid++;
4170                 bus = TAILQ_NEXT(bus, links);
4171         }
4172
4173         /*
4174          * Ensure that this pathid is not reserved for
4175          * a bus that may be registered in the future.
4176          */
4177         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4178                 ++pathid;
4179                 /* Start the search over */
4180                 goto retry;
4181         }
4182         return (pathid);
4183 }
4184
4185 static path_id_t
4186 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4187 {
4188         path_id_t pathid;
4189         int i, dunit, val;
4190         char buf[32];
4191         const char *dname;
4192
4193         pathid = CAM_XPT_PATH_ID;
4194         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4195         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4196                 return (pathid);
4197         i = 0;
4198         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4199                 if (strcmp(dname, "scbus")) {
4200                         /* Avoid a bit of foot shooting. */
4201                         continue;
4202                 }
4203                 if (dunit < 0)          /* unwired?! */
4204                         continue;
4205                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4206                         if (sim_bus == val) {
4207                                 pathid = dunit;
4208                                 break;
4209                         }
4210                 } else if (sim_bus == 0) {
4211                         /* Unspecified matches bus 0 */
4212                         pathid = dunit;
4213                         break;
4214                 } else {
4215                         printf("Ambiguous scbus configuration for %s%d "
4216                                "bus %d, cannot wire down.  The kernel "
4217                                "config entry for scbus%d should "
4218                                "specify a controller bus.\n"
4219                                "Scbus will be assigned dynamically.\n",
4220                                sim_name, sim_unit, sim_bus, dunit);
4221                         break;
4222                 }
4223         }
4224
4225         if (pathid == CAM_XPT_PATH_ID)
4226                 pathid = xptnextfreepathid();
4227         return (pathid);
4228 }
4229
4230 static const char *
4231 xpt_async_string(u_int32_t async_code)
4232 {
4233
4234         switch (async_code) {
4235         case AC_BUS_RESET: return ("AC_BUS_RESET");
4236         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4237         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4238         case AC_SENT_BDR: return ("AC_SENT_BDR");
4239         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4240         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4241         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4242         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4243         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4244         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4245         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4246         case AC_CONTRACT: return ("AC_CONTRACT");
4247         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4248         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4249         }
4250         return ("AC_UNKNOWN");
4251 }
4252
4253 static int
4254 xpt_async_size(u_int32_t async_code)
4255 {
4256
4257         switch (async_code) {
4258         case AC_BUS_RESET: return (0);
4259         case AC_UNSOL_RESEL: return (0);
4260         case AC_SCSI_AEN: return (0);
4261         case AC_SENT_BDR: return (0);
4262         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4263         case AC_PATH_DEREGISTERED: return (0);
4264         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4265         case AC_LOST_DEVICE: return (0);
4266         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4267         case AC_INQ_CHANGED: return (0);
4268         case AC_GETDEV_CHANGED: return (0);
4269         case AC_CONTRACT: return (sizeof(struct ac_contract));
4270         case AC_ADVINFO_CHANGED: return (-1);
4271         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4272         }
4273         return (0);
4274 }
4275
4276 static int
4277 xpt_async_process_dev(struct cam_ed *device, void *arg)
4278 {
4279         union ccb *ccb = arg;
4280         struct cam_path *path = ccb->ccb_h.path;
4281         void *async_arg = ccb->casync.async_arg_ptr;
4282         u_int32_t async_code = ccb->casync.async_code;
4283         int relock;
4284
4285         if (path->device != device
4286          && path->device->lun_id != CAM_LUN_WILDCARD
4287          && device->lun_id != CAM_LUN_WILDCARD)
4288                 return (1);
4289
4290         /*
4291          * The async callback could free the device.
4292          * If it is a broadcast async, it doesn't hold
4293          * device reference, so take our own reference.
4294          */
4295         xpt_acquire_device(device);
4296
4297         /*
4298          * If async for specific device is to be delivered to
4299          * the wildcard client, take the specific device lock.
4300          * XXX: We may need a way for client to specify it.
4301          */
4302         if ((device->lun_id == CAM_LUN_WILDCARD &&
4303              path->device->lun_id != CAM_LUN_WILDCARD) ||
4304             (device->target->target_id == CAM_TARGET_WILDCARD &&
4305              path->target->target_id != CAM_TARGET_WILDCARD) ||
4306             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4307              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4308                 mtx_unlock(&device->device_mtx);
4309                 xpt_path_lock(path);
4310                 relock = 1;
4311         } else
4312                 relock = 0;
4313
4314         (*(device->target->bus->xport->ops->async))(async_code,
4315             device->target->bus, device->target, device, async_arg);
4316         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4317
4318         if (relock) {
4319                 xpt_path_unlock(path);
4320                 mtx_lock(&device->device_mtx);
4321         }
4322         xpt_release_device(device);
4323         return (1);
4324 }
4325
4326 static int
4327 xpt_async_process_tgt(struct cam_et *target, void *arg)
4328 {
4329         union ccb *ccb = arg;
4330         struct cam_path *path = ccb->ccb_h.path;
4331
4332         if (path->target != target
4333          && path->target->target_id != CAM_TARGET_WILDCARD
4334          && target->target_id != CAM_TARGET_WILDCARD)
4335                 return (1);
4336
4337         if (ccb->casync.async_code == AC_SENT_BDR) {
4338                 /* Update our notion of when the last reset occurred */
4339                 microtime(&target->last_reset);
4340         }
4341
4342         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4343 }
4344
4345 static void
4346 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4347 {
4348         struct cam_eb *bus;
4349         struct cam_path *path;
4350         void *async_arg;
4351         u_int32_t async_code;
4352
4353         path = ccb->ccb_h.path;
4354         async_code = ccb->casync.async_code;
4355         async_arg = ccb->casync.async_arg_ptr;
4356         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4357             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4358         bus = path->bus;
4359
4360         if (async_code == AC_BUS_RESET) {
4361                 /* Update our notion of when the last reset occurred */
4362                 microtime(&bus->last_reset);
4363         }
4364
4365         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4366
4367         /*
4368          * If this wasn't a fully wildcarded async, tell all
4369          * clients that want all async events.
4370          */
4371         if (bus != xpt_periph->path->bus) {
4372                 xpt_path_lock(xpt_periph->path);
4373                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4374                 xpt_path_unlock(xpt_periph->path);
4375         }
4376
4377         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4378                 xpt_release_devq(path, 1, TRUE);
4379         else
4380                 xpt_release_simq(path->bus->sim, TRUE);
4381         if (ccb->casync.async_arg_size > 0)
4382                 free(async_arg, M_CAMXPT);
4383         xpt_free_path(path);
4384         xpt_free_ccb(ccb);
4385 }
4386
4387 static void
4388 xpt_async_bcast(struct async_list *async_head,
4389                 u_int32_t async_code,
4390                 struct cam_path *path, void *async_arg)
4391 {
4392         struct async_node *cur_entry;
4393         struct mtx *mtx;
4394
4395         cur_entry = SLIST_FIRST(async_head);
4396         while (cur_entry != NULL) {
4397                 struct async_node *next_entry;
4398                 /*
4399                  * Grab the next list entry before we call the current
4400                  * entry's callback.  This is because the callback function
4401                  * can delete its async callback entry.
4402                  */
4403                 next_entry = SLIST_NEXT(cur_entry, links);
4404                 if ((cur_entry->event_enable & async_code) != 0) {
4405                         mtx = cur_entry->event_lock ?
4406                             path->device->sim->mtx : NULL;
4407                         if (mtx)
4408                                 mtx_lock(mtx);
4409                         cur_entry->callback(cur_entry->callback_arg,
4410                                             async_code, path,
4411                                             async_arg);
4412                         if (mtx)
4413                                 mtx_unlock(mtx);
4414                 }
4415                 cur_entry = next_entry;
4416         }
4417 }
4418
4419 void
4420 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4421 {
4422         union ccb *ccb;
4423         int size;
4424
4425         ccb = xpt_alloc_ccb_nowait();
4426         if (ccb == NULL) {
4427                 xpt_print(path, "Can't allocate CCB to send %s\n",
4428                     xpt_async_string(async_code));
4429                 return;
4430         }
4431
4432         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4433                 xpt_print(path, "Can't allocate path to send %s\n",
4434                     xpt_async_string(async_code));
4435                 xpt_free_ccb(ccb);
4436                 return;
4437         }
4438         ccb->ccb_h.path->periph = NULL;
4439         ccb->ccb_h.func_code = XPT_ASYNC;
4440         ccb->ccb_h.cbfcnp = xpt_async_process;
4441         ccb->ccb_h.flags |= CAM_UNLOCKED;
4442         ccb->casync.async_code = async_code;
4443         ccb->casync.async_arg_size = 0;
4444         size = xpt_async_size(async_code);
4445         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4446             ("xpt_async: func %#x %s aync_code %d %s\n",
4447                 ccb->ccb_h.func_code,
4448                 xpt_action_name(ccb->ccb_h.func_code),
4449                 async_code,
4450                 xpt_async_string(async_code)));
4451         if (size > 0 && async_arg != NULL) {
4452                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4453                 if (ccb->casync.async_arg_ptr == NULL) {
4454                         xpt_print(path, "Can't allocate argument to send %s\n",
4455                             xpt_async_string(async_code));
4456                         xpt_free_path(ccb->ccb_h.path);
4457                         xpt_free_ccb(ccb);
4458                         return;
4459                 }
4460                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4461                 ccb->casync.async_arg_size = size;
4462         } else if (size < 0) {
4463                 ccb->casync.async_arg_ptr = async_arg;
4464                 ccb->casync.async_arg_size = size;
4465         }
4466         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4467                 xpt_freeze_devq(path, 1);
4468         else
4469                 xpt_freeze_simq(path->bus->sim, 1);
4470         xpt_action(ccb);
4471 }
4472
4473 static void
4474 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4475                       struct cam_et *target, struct cam_ed *device,
4476                       void *async_arg)
4477 {
4478
4479         /*
4480          * We only need to handle events for real devices.
4481          */
4482         if (target->target_id == CAM_TARGET_WILDCARD
4483          || device->lun_id == CAM_LUN_WILDCARD)
4484                 return;
4485
4486         printf("%s called\n", __func__);
4487 }
4488
4489 static uint32_t
4490 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4491 {
4492         struct cam_devq *devq;
4493         uint32_t freeze;
4494
4495         devq = dev->sim->devq;
4496         mtx_assert(&devq->send_mtx, MA_OWNED);
4497         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4498             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4499             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4500         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4501         /* Remove frozen device from sendq. */
4502         if (device_is_queued(dev))
4503                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4504         return (freeze);
4505 }
4506
4507 u_int32_t
4508 xpt_freeze_devq(struct cam_path *path, u_int count)
4509 {
4510         struct cam_ed   *dev = path->device;
4511         struct cam_devq *devq;
4512         uint32_t         freeze;
4513
4514         devq = dev->sim->devq;
4515         mtx_lock(&devq->send_mtx);
4516         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4517         freeze = xpt_freeze_devq_device(dev, count);
4518         mtx_unlock(&devq->send_mtx);
4519         return (freeze);
4520 }
4521
4522 u_int32_t
4523 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4524 {
4525         struct cam_devq *devq;
4526         uint32_t         freeze;
4527
4528         devq = sim->devq;
4529         mtx_lock(&devq->send_mtx);
4530         freeze = (devq->send_queue.qfrozen_cnt += count);
4531         mtx_unlock(&devq->send_mtx);
4532         return (freeze);
4533 }
4534
4535 static void
4536 xpt_release_devq_timeout(void *arg)
4537 {
4538         struct cam_ed *dev;
4539         struct cam_devq *devq;
4540
4541         dev = (struct cam_ed *)arg;
4542         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4543         devq = dev->sim->devq;
4544         mtx_assert(&devq->send_mtx, MA_OWNED);
4545         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4546                 xpt_run_devq(devq);
4547 }
4548
4549 void
4550 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4551 {
4552         struct cam_ed *dev;
4553         struct cam_devq *devq;
4554
4555         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4556             count, run_queue));
4557         dev = path->device;
4558         devq = dev->sim->devq;
4559         mtx_lock(&devq->send_mtx);
4560         if (xpt_release_devq_device(dev, count, run_queue))
4561                 xpt_run_devq(dev->sim->devq);
4562         mtx_unlock(&devq->send_mtx);
4563 }
4564
4565 static int
4566 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4567 {
4568
4569         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4570         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4571             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4572             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4573         if (count > dev->ccbq.queue.qfrozen_cnt) {
4574 #ifdef INVARIANTS
4575                 printf("xpt_release_devq(): requested %u > present %u\n",
4576                     count, dev->ccbq.queue.qfrozen_cnt);
4577 #endif
4578                 count = dev->ccbq.queue.qfrozen_cnt;
4579         }
4580         dev->ccbq.queue.qfrozen_cnt -= count;
4581         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4582                 /*
4583                  * No longer need to wait for a successful
4584                  * command completion.
4585                  */
4586                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4587                 /*
4588                  * Remove any timeouts that might be scheduled
4589                  * to release this queue.
4590                  */
4591                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4592                         callout_stop(&dev->callout);
4593                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4594                 }
4595                 /*
4596                  * Now that we are unfrozen schedule the
4597                  * device so any pending transactions are
4598                  * run.
4599                  */
4600                 xpt_schedule_devq(dev->sim->devq, dev);
4601         } else
4602                 run_queue = 0;
4603         return (run_queue);
4604 }
4605
4606 void
4607 xpt_release_simq(struct cam_sim *sim, int run_queue)
4608 {
4609         struct cam_devq *devq;
4610
4611         devq = sim->devq;
4612         mtx_lock(&devq->send_mtx);
4613         if (devq->send_queue.qfrozen_cnt <= 0) {
4614 #ifdef INVARIANTS
4615                 printf("xpt_release_simq: requested 1 > present %u\n",
4616                     devq->send_queue.qfrozen_cnt);
4617 #endif
4618         } else
4619                 devq->send_queue.qfrozen_cnt--;
4620         if (devq->send_queue.qfrozen_cnt == 0) {
4621                 /*
4622                  * If there is a timeout scheduled to release this
4623                  * sim queue, remove it.  The queue frozen count is
4624                  * already at 0.
4625                  */
4626                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4627                         callout_stop(&sim->callout);
4628                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4629                 }
4630                 if (run_queue) {
4631                         /*
4632                          * Now that we are unfrozen run the send queue.
4633                          */
4634                         xpt_run_devq(sim->devq);
4635                 }
4636         }
4637         mtx_unlock(&devq->send_mtx);
4638 }
4639
4640 /*
4641  * XXX Appears to be unused.
4642  */
4643 static void
4644 xpt_release_simq_timeout(void *arg)
4645 {
4646         struct cam_sim *sim;
4647
4648         sim = (struct cam_sim *)arg;
4649         xpt_release_simq(sim, /* run_queue */ TRUE);
4650 }
4651
4652 void
4653 xpt_done(union ccb *done_ccb)
4654 {
4655         struct cam_doneq *queue;
4656         int     run, hash;
4657
4658 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4659         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4660             done_ccb->csio.bio != NULL)
4661                 biotrack(done_ccb->csio.bio, __func__);
4662 #endif
4663
4664         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4665             ("xpt_done: func= %#x %s status %#x\n",
4666                 done_ccb->ccb_h.func_code,
4667                 xpt_action_name(done_ccb->ccb_h.func_code),
4668                 done_ccb->ccb_h.status));
4669         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4670                 return;
4671
4672         /* Store the time the ccb was in the sim */
4673         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4674         hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4675             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4676         queue = &cam_doneqs[hash];
4677         mtx_lock(&queue->cam_doneq_mtx);
4678         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4679         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4680         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4681         mtx_unlock(&queue->cam_doneq_mtx);
4682         if (run)
4683                 wakeup(&queue->cam_doneq);
4684 }
4685
4686 void
4687 xpt_done_direct(union ccb *done_ccb)
4688 {
4689
4690         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4691             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4692         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4693                 return;
4694
4695         /* Store the time the ccb was in the sim */
4696         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4697         xpt_done_process(&done_ccb->ccb_h);
4698 }
4699
4700 union ccb *
4701 xpt_alloc_ccb()
4702 {
4703         union ccb *new_ccb;
4704
4705         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4706         return (new_ccb);
4707 }
4708
4709 union ccb *
4710 xpt_alloc_ccb_nowait()
4711 {
4712         union ccb *new_ccb;
4713
4714         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4715         return (new_ccb);
4716 }
4717
4718 void
4719 xpt_free_ccb(union ccb *free_ccb)
4720 {
4721         free(free_ccb, M_CAMCCB);
4722 }
4723
4724
4725
4726 /* Private XPT functions */
4727
4728 /*
4729  * Get a CAM control block for the caller. Charge the structure to the device
4730  * referenced by the path.  If we don't have sufficient resources to allocate
4731  * more ccbs, we return NULL.
4732  */
4733 static union ccb *
4734 xpt_get_ccb_nowait(struct cam_periph *periph)
4735 {
4736         union ccb *new_ccb;
4737
4738         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4739         if (new_ccb == NULL)
4740                 return (NULL);
4741         periph->periph_allocated++;
4742         cam_ccbq_take_opening(&periph->path->device->ccbq);
4743         return (new_ccb);
4744 }
4745
4746 static union ccb *
4747 xpt_get_ccb(struct cam_periph *periph)
4748 {
4749         union ccb *new_ccb;
4750
4751         cam_periph_unlock(periph);
4752         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4753         cam_periph_lock(periph);
4754         periph->periph_allocated++;
4755         cam_ccbq_take_opening(&periph->path->device->ccbq);
4756         return (new_ccb);
4757 }
4758
4759 union ccb *
4760 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4761 {
4762         struct ccb_hdr *ccb_h;
4763
4764         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4765         cam_periph_assert(periph, MA_OWNED);
4766         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4767             ccb_h->pinfo.priority != priority) {
4768                 if (priority < periph->immediate_priority) {
4769                         periph->immediate_priority = priority;
4770                         xpt_run_allocq(periph, 0);
4771                 } else
4772                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4773                             "cgticb", 0);
4774         }
4775         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4776         return ((union ccb *)ccb_h);
4777 }
4778
4779 static void
4780 xpt_acquire_bus(struct cam_eb *bus)
4781 {
4782
4783         xpt_lock_buses();
4784         bus->refcount++;
4785         xpt_unlock_buses();
4786 }
4787
4788 static void
4789 xpt_release_bus(struct cam_eb *bus)
4790 {
4791
4792         xpt_lock_buses();
4793         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4794         if (--bus->refcount > 0) {
4795                 xpt_unlock_buses();
4796                 return;
4797         }
4798         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4799         xsoftc.bus_generation++;
4800         xpt_unlock_buses();
4801         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4802             ("destroying bus, but target list is not empty"));
4803         cam_sim_release(bus->sim);
4804         mtx_destroy(&bus->eb_mtx);
4805         free(bus, M_CAMXPT);
4806 }
4807
4808 static struct cam_et *
4809 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4810 {
4811         struct cam_et *cur_target, *target;
4812
4813         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4814         mtx_assert(&bus->eb_mtx, MA_OWNED);
4815         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4816                                          M_NOWAIT|M_ZERO);
4817         if (target == NULL)
4818                 return (NULL);
4819
4820         TAILQ_INIT(&target->ed_entries);
4821         target->bus = bus;
4822         target->target_id = target_id;
4823         target->refcount = 1;
4824         target->generation = 0;
4825         target->luns = NULL;
4826         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4827         timevalclear(&target->last_reset);
4828         /*
4829          * Hold a reference to our parent bus so it
4830          * will not go away before we do.
4831          */
4832         bus->refcount++;
4833
4834         /* Insertion sort into our bus's target list */
4835         cur_target = TAILQ_FIRST(&bus->et_entries);
4836         while (cur_target != NULL && cur_target->target_id < target_id)
4837                 cur_target = TAILQ_NEXT(cur_target, links);
4838         if (cur_target != NULL) {
4839                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4840         } else {
4841                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4842         }
4843         bus->generation++;
4844         return (target);
4845 }
4846
4847 static void
4848 xpt_acquire_target(struct cam_et *target)
4849 {
4850         struct cam_eb *bus = target->bus;
4851
4852         mtx_lock(&bus->eb_mtx);
4853         target->refcount++;
4854         mtx_unlock(&bus->eb_mtx);
4855 }
4856
4857 static void
4858 xpt_release_target(struct cam_et *target)
4859 {
4860         struct cam_eb *bus = target->bus;
4861
4862         mtx_lock(&bus->eb_mtx);
4863         if (--target->refcount > 0) {
4864                 mtx_unlock(&bus->eb_mtx);
4865                 return;
4866         }
4867         TAILQ_REMOVE(&bus->et_entries, target, links);
4868         bus->generation++;
4869         mtx_unlock(&bus->eb_mtx);
4870         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4871             ("destroying target, but device list is not empty"));
4872         xpt_release_bus(bus);
4873         mtx_destroy(&target->luns_mtx);
4874         if (target->luns)
4875                 free(target->luns, M_CAMXPT);
4876         free(target, M_CAMXPT);
4877 }
4878
4879 static struct cam_ed *
4880 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4881                          lun_id_t lun_id)
4882 {
4883         struct cam_ed *device;
4884
4885         device = xpt_alloc_device(bus, target, lun_id);
4886         if (device == NULL)
4887                 return (NULL);
4888
4889         device->mintags = 1;
4890         device->maxtags = 1;
4891         return (device);
4892 }
4893
4894 static void
4895 xpt_destroy_device(void *context, int pending)
4896 {
4897         struct cam_ed   *device = context;
4898
4899         mtx_lock(&device->device_mtx);
4900         mtx_destroy(&device->device_mtx);
4901         free(device, M_CAMDEV);
4902 }
4903
4904 struct cam_ed *
4905 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4906 {
4907         struct cam_ed   *cur_device, *device;
4908         struct cam_devq *devq;
4909         cam_status status;
4910
4911         mtx_assert(&bus->eb_mtx, MA_OWNED);
4912         /* Make space for us in the device queue on our bus */
4913         devq = bus->sim->devq;
4914         mtx_lock(&devq->send_mtx);
4915         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4916         mtx_unlock(&devq->send_mtx);
4917         if (status != CAM_REQ_CMP)
4918                 return (NULL);
4919
4920         device = (struct cam_ed *)malloc(sizeof(*device),
4921                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4922         if (device == NULL)
4923                 return (NULL);
4924
4925         cam_init_pinfo(&device->devq_entry);
4926         device->target = target;
4927         device->lun_id = lun_id;
4928         device->sim = bus->sim;
4929         if (cam_ccbq_init(&device->ccbq,
4930                           bus->sim->max_dev_openings) != 0) {
4931                 free(device, M_CAMDEV);
4932                 return (NULL);
4933         }
4934         SLIST_INIT(&device->asyncs);
4935         SLIST_INIT(&device->periphs);
4936         device->generation = 0;
4937         device->flags = CAM_DEV_UNCONFIGURED;
4938         device->tag_delay_count = 0;
4939         device->tag_saved_openings = 0;
4940         device->refcount = 1;
4941         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4942         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4943         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4944         /*
4945          * Hold a reference to our parent bus so it
4946          * will not go away before we do.
4947          */
4948         target->refcount++;
4949
4950         cur_device = TAILQ_FIRST(&target->ed_entries);
4951         while (cur_device != NULL && cur_device->lun_id < lun_id)
4952                 cur_device = TAILQ_NEXT(cur_device, links);
4953         if (cur_device != NULL)
4954                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4955         else
4956                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4957         target->generation++;
4958         return (device);
4959 }
4960
4961 void
4962 xpt_acquire_device(struct cam_ed *device)
4963 {
4964         struct cam_eb *bus = device->target->bus;
4965
4966         mtx_lock(&bus->eb_mtx);
4967         device->refcount++;
4968         mtx_unlock(&bus->eb_mtx);
4969 }
4970
4971 void
4972 xpt_release_device(struct cam_ed *device)
4973 {
4974         struct cam_eb *bus = device->target->bus;
4975         struct cam_devq *devq;
4976
4977         mtx_lock(&bus->eb_mtx);
4978         if (--device->refcount > 0) {
4979                 mtx_unlock(&bus->eb_mtx);
4980                 return;
4981         }
4982
4983         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4984         device->target->generation++;
4985         mtx_unlock(&bus->eb_mtx);
4986
4987         /* Release our slot in the devq */
4988         devq = bus->sim->devq;
4989         mtx_lock(&devq->send_mtx);
4990         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4991         mtx_unlock(&devq->send_mtx);
4992
4993         KASSERT(SLIST_EMPTY(&device->periphs),
4994             ("destroying device, but periphs list is not empty"));
4995         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4996             ("destroying device while still queued for ccbs"));
4997
4998         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4999                 callout_stop(&device->callout);
5000
5001         xpt_release_target(device->target);
5002
5003         cam_ccbq_fini(&device->ccbq);
5004         /*
5005          * Free allocated memory.  free(9) does nothing if the
5006          * supplied pointer is NULL, so it is safe to call without
5007          * checking.
5008          */
5009         free(device->supported_vpds, M_CAMXPT);
5010         free(device->device_id, M_CAMXPT);
5011         free(device->ext_inq, M_CAMXPT);
5012         free(device->physpath, M_CAMXPT);
5013         free(device->rcap_buf, M_CAMXPT);
5014         free(device->serial_num, M_CAMXPT);
5015         free(device->nvme_data, M_CAMXPT);
5016         free(device->nvme_cdata, M_CAMXPT);
5017         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5018 }
5019
5020 u_int32_t
5021 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5022 {
5023         int     result;
5024         struct  cam_ed *dev;
5025
5026         dev = path->device;
5027         mtx_lock(&dev->sim->devq->send_mtx);
5028         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5029         mtx_unlock(&dev->sim->devq->send_mtx);
5030         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5031          || (dev->inq_flags & SID_CmdQue) != 0)
5032                 dev->tag_saved_openings = newopenings;
5033         return (result);
5034 }
5035
5036 static struct cam_eb *
5037 xpt_find_bus(path_id_t path_id)
5038 {
5039         struct cam_eb *bus;
5040
5041         xpt_lock_buses();
5042         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5043              bus != NULL;
5044              bus = TAILQ_NEXT(bus, links)) {
5045                 if (bus->path_id == path_id) {
5046                         bus->refcount++;
5047                         break;
5048                 }
5049         }
5050         xpt_unlock_buses();
5051         return (bus);
5052 }
5053
5054 static struct cam_et *
5055 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5056 {
5057         struct cam_et *target;
5058
5059         mtx_assert(&bus->eb_mtx, MA_OWNED);
5060         for (target = TAILQ_FIRST(&bus->et_entries);
5061              target != NULL;
5062              target = TAILQ_NEXT(target, links)) {
5063                 if (target->target_id == target_id) {
5064                         target->refcount++;
5065                         break;
5066                 }
5067         }
5068         return (target);
5069 }
5070
5071 static struct cam_ed *
5072 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5073 {
5074         struct cam_ed *device;
5075
5076         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5077         for (device = TAILQ_FIRST(&target->ed_entries);
5078              device != NULL;
5079              device = TAILQ_NEXT(device, links)) {
5080                 if (device->lun_id == lun_id) {
5081                         device->refcount++;
5082                         break;
5083                 }
5084         }
5085         return (device);
5086 }
5087
5088 void
5089 xpt_start_tags(struct cam_path *path)
5090 {
5091         struct ccb_relsim crs;
5092         struct cam_ed *device;
5093         struct cam_sim *sim;
5094         int    newopenings;
5095
5096         device = path->device;
5097         sim = path->bus->sim;
5098         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5099         xpt_freeze_devq(path, /*count*/1);
5100         device->inq_flags |= SID_CmdQue;
5101         if (device->tag_saved_openings != 0)
5102                 newopenings = device->tag_saved_openings;
5103         else
5104                 newopenings = min(device->maxtags,
5105                                   sim->max_tagged_dev_openings);
5106         xpt_dev_ccbq_resize(path, newopenings);
5107         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5108         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5109         crs.ccb_h.func_code = XPT_REL_SIMQ;
5110         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5111         crs.openings
5112             = crs.release_timeout
5113             = crs.qfrozen_cnt
5114             = 0;
5115         xpt_action((union ccb *)&crs);
5116 }
5117
5118 void
5119 xpt_stop_tags(struct cam_path *path)
5120 {
5121         struct ccb_relsim crs;
5122         struct cam_ed *device;
5123         struct cam_sim *sim;
5124
5125         device = path->device;
5126         sim = path->bus->sim;
5127         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5128         device->tag_delay_count = 0;
5129         xpt_freeze_devq(path, /*count*/1);
5130         device->inq_flags &= ~SID_CmdQue;
5131         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5132         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5133         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5134         crs.ccb_h.func_code = XPT_REL_SIMQ;
5135         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5136         crs.openings
5137             = crs.release_timeout
5138             = crs.qfrozen_cnt
5139             = 0;
5140         xpt_action((union ccb *)&crs);
5141 }
5142
5143 /*
5144  * Assume all possible buses are detected by this time, so allow boot
5145  * as soon as they all are scanned.
5146  */
5147 static void
5148 xpt_boot_delay(void *arg)
5149 {
5150
5151         xpt_release_boot();
5152 }
5153
5154 /*
5155  * Now that all config hooks have completed, start boot_delay timer,
5156  * waiting for possibly still undetected buses (USB) to appear.
5157  */
5158 static void
5159 xpt_ch_done(void *arg)
5160 {
5161
5162         callout_init(&xsoftc.boot_callout, 1);
5163         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5164             xpt_boot_delay, NULL, 0);
5165 }
5166 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5167
5168 /*
5169  * Now that interrupts are enabled, go find our devices
5170  */
5171 static void
5172 xpt_config(void *arg)
5173 {
5174         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5175                 printf("xpt_config: failed to create taskqueue thread.\n");
5176
5177         /* Setup debugging path */
5178         if (cam_dflags != CAM_DEBUG_NONE) {
5179                 if (xpt_create_path(&cam_dpath, NULL,
5180                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5181                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5182                         printf("xpt_config: xpt_create_path() failed for debug"
5183                                " target %d:%d:%d, debugging disabled\n",
5184                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5185                         cam_dflags = CAM_DEBUG_NONE;
5186                 }
5187         } else
5188                 cam_dpath = NULL;
5189
5190         periphdriver_init(1);
5191         xpt_hold_boot();
5192
5193         /* Fire up rescan thread. */
5194         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5195             "cam", "scanner")) {
5196                 printf("xpt_config: failed to create rescan thread.\n");
5197         }
5198 }
5199
5200 void
5201 xpt_hold_boot_locked(void)
5202 {
5203
5204         if (xsoftc.buses_to_config++ == 0)
5205                 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5206 }
5207
5208 void
5209 xpt_hold_boot(void)
5210 {
5211
5212         xpt_lock_buses();
5213         xpt_hold_boot_locked();
5214         xpt_unlock_buses();
5215 }
5216
5217 void
5218 xpt_release_boot(void)
5219 {
5220
5221         xpt_lock_buses();
5222         if (--xsoftc.buses_to_config == 0) {
5223                 if (xsoftc.buses_config_done == 0) {
5224                         xsoftc.buses_config_done = 1;
5225                         xsoftc.buses_to_config++;
5226                         TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5227                             NULL);
5228                         taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5229                 } else
5230                         root_mount_rel(&xsoftc.xpt_rootmount);
5231         }
5232         xpt_unlock_buses();
5233 }
5234
5235 /*
5236  * If the given device only has one peripheral attached to it, and if that
5237  * peripheral is the passthrough driver, announce it.  This insures that the
5238  * user sees some sort of announcement for every peripheral in their system.
5239  */
5240 static int
5241 xptpassannouncefunc(struct cam_ed *device, void *arg)
5242 {
5243         struct cam_periph *periph;
5244         int i;
5245
5246         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5247              periph = SLIST_NEXT(periph, periph_links), i++);
5248
5249         periph = SLIST_FIRST(&device->periphs);
5250         if ((i == 1)
5251          && (strncmp(periph->periph_name, "pass", 4) == 0))
5252                 xpt_announce_periph(periph, NULL);
5253
5254         return(1);
5255 }
5256
5257 static void
5258 xpt_finishconfig_task(void *context, int pending)
5259 {
5260
5261         periphdriver_init(2);
5262         /*
5263          * Check for devices with no "standard" peripheral driver
5264          * attached.  For any devices like that, announce the
5265          * passthrough driver so the user will see something.
5266          */
5267         if (!bootverbose)
5268                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5269
5270         xpt_release_boot();
5271 }
5272
5273 cam_status
5274 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5275                    struct cam_path *path)
5276 {
5277         struct ccb_setasync csa;
5278         cam_status status;
5279         int xptpath = 0;
5280
5281         if (path == NULL) {
5282                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5283                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5284                 if (status != CAM_REQ_CMP)
5285                         return (status);
5286                 xpt_path_lock(path);
5287                 xptpath = 1;
5288         }
5289
5290         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5291         csa.ccb_h.func_code = XPT_SASYNC_CB;
5292         csa.event_enable = event;
5293         csa.callback = cbfunc;
5294         csa.callback_arg = cbarg;
5295         xpt_action((union ccb *)&csa);
5296         status = csa.ccb_h.status;
5297
5298         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5299             ("xpt_register_async: func %p\n", cbfunc));
5300
5301         if (xptpath) {
5302                 xpt_path_unlock(path);
5303                 xpt_free_path(path);
5304         }
5305
5306         if ((status == CAM_REQ_CMP) &&
5307             (csa.event_enable & AC_FOUND_DEVICE)) {
5308                 /*
5309                  * Get this peripheral up to date with all
5310                  * the currently existing devices.
5311                  */
5312                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5313         }
5314         if ((status == CAM_REQ_CMP) &&
5315             (csa.event_enable & AC_PATH_REGISTERED)) {
5316                 /*
5317                  * Get this peripheral up to date with all
5318                  * the currently existing buses.
5319                  */
5320                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5321         }
5322
5323         return (status);
5324 }
5325
5326 static void
5327 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5328 {
5329         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5330
5331         switch (work_ccb->ccb_h.func_code) {
5332         /* Common cases first */
5333         case XPT_PATH_INQ:              /* Path routing inquiry */
5334         {
5335                 struct ccb_pathinq *cpi;
5336
5337                 cpi = &work_ccb->cpi;
5338                 cpi->version_num = 1; /* XXX??? */
5339                 cpi->hba_inquiry = 0;
5340                 cpi->target_sprt = 0;
5341                 cpi->hba_misc = 0;
5342                 cpi->hba_eng_cnt = 0;
5343                 cpi->max_target = 0;
5344                 cpi->max_lun = 0;
5345                 cpi->initiator_id = 0;
5346                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5347                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5348                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5349                 cpi->unit_number = sim->unit_number;
5350                 cpi->bus_id = sim->bus_id;
5351                 cpi->base_transfer_speed = 0;
5352                 cpi->protocol = PROTO_UNSPECIFIED;
5353                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5354                 cpi->transport = XPORT_UNSPECIFIED;
5355                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5356                 cpi->ccb_h.status = CAM_REQ_CMP;
5357                 xpt_done(work_ccb);
5358                 break;
5359         }
5360         default:
5361                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5362                 xpt_done(work_ccb);
5363                 break;
5364         }
5365 }
5366
5367 /*
5368  * The xpt as a "controller" has no interrupt sources, so polling
5369  * is a no-op.
5370  */
5371 static void
5372 xptpoll(struct cam_sim *sim)
5373 {
5374 }
5375
5376 void
5377 xpt_lock_buses(void)
5378 {
5379         mtx_lock(&xsoftc.xpt_topo_lock);
5380 }
5381
5382 void
5383 xpt_unlock_buses(void)
5384 {
5385         mtx_unlock(&xsoftc.xpt_topo_lock);
5386 }
5387
5388 struct mtx *
5389 xpt_path_mtx(struct cam_path *path)
5390 {
5391
5392         return (&path->device->device_mtx);
5393 }
5394
5395 static void
5396 xpt_done_process(struct ccb_hdr *ccb_h)
5397 {
5398         struct cam_sim *sim = NULL;
5399         struct cam_devq *devq = NULL;
5400         struct mtx *mtx = NULL;
5401
5402 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5403         struct ccb_scsiio *csio;
5404
5405         if (ccb_h->func_code == XPT_SCSI_IO) {
5406                 csio = &((union ccb *)ccb_h)->csio;
5407                 if (csio->bio != NULL)
5408                         biotrack(csio->bio, __func__);
5409         }
5410 #endif
5411
5412         if (ccb_h->flags & CAM_HIGH_POWER) {
5413                 struct highpowerlist    *hphead;
5414                 struct cam_ed           *device;
5415
5416                 mtx_lock(&xsoftc.xpt_highpower_lock);
5417                 hphead = &xsoftc.highpowerq;
5418
5419                 device = STAILQ_FIRST(hphead);
5420
5421                 /*
5422                  * Increment the count since this command is done.
5423                  */
5424                 xsoftc.num_highpower++;
5425
5426                 /*
5427                  * Any high powered commands queued up?
5428                  */
5429                 if (device != NULL) {
5430
5431                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5432                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5433
5434                         mtx_lock(&device->sim->devq->send_mtx);
5435                         xpt_release_devq_device(device,
5436                                          /*count*/1, /*runqueue*/TRUE);
5437                         mtx_unlock(&device->sim->devq->send_mtx);
5438                 } else
5439                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5440         }
5441
5442         /*
5443          * Insulate against a race where the periph is destroyed but CCBs are
5444          * still not all processed. This shouldn't happen, but allows us better
5445          * bug diagnostic when it does.
5446          */
5447         if (ccb_h->path->bus)
5448                 sim = ccb_h->path->bus->sim;
5449
5450         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5451                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5452                 xpt_release_simq(sim, /*run_queue*/FALSE);
5453                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5454         }
5455
5456         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5457          && (ccb_h->status & CAM_DEV_QFRZN)) {
5458                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5459                 ccb_h->status &= ~CAM_DEV_QFRZN;
5460         }
5461
5462         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5463                 struct cam_ed *dev = ccb_h->path->device;
5464
5465                 if (sim)
5466                         devq = sim->devq;
5467                 KASSERT(devq, ("Periph disappeared with request pending."));
5468
5469                 mtx_lock(&devq->send_mtx);
5470                 devq->send_active--;
5471                 devq->send_openings++;
5472                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5473
5474                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5475                   && (dev->ccbq.dev_active == 0))) {
5476                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5477                         xpt_release_devq_device(dev, /*count*/1,
5478                                          /*run_queue*/FALSE);
5479                 }
5480
5481                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5482                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5483                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5484                         xpt_release_devq_device(dev, /*count*/1,
5485                                          /*run_queue*/FALSE);
5486                 }
5487
5488                 if (!device_is_queued(dev))
5489                         (void)xpt_schedule_devq(devq, dev);
5490                 xpt_run_devq(devq);
5491                 mtx_unlock(&devq->send_mtx);
5492
5493                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5494                         mtx = xpt_path_mtx(ccb_h->path);
5495                         mtx_lock(mtx);
5496
5497                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5498                          && (--dev->tag_delay_count == 0))
5499                                 xpt_start_tags(ccb_h->path);
5500                 }
5501         }
5502
5503         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5504                 if (mtx == NULL) {
5505                         mtx = xpt_path_mtx(ccb_h->path);
5506                         mtx_lock(mtx);
5507                 }
5508         } else {
5509                 if (mtx != NULL) {
5510                         mtx_unlock(mtx);
5511                         mtx = NULL;
5512                 }
5513         }
5514
5515         /* Call the peripheral driver's callback */
5516         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5517         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5518         if (mtx != NULL)
5519                 mtx_unlock(mtx);
5520 }
5521
5522 void
5523 xpt_done_td(void *arg)
5524 {
5525         struct cam_doneq *queue = arg;
5526         struct ccb_hdr *ccb_h;
5527         STAILQ_HEAD(, ccb_hdr)  doneq;
5528
5529         STAILQ_INIT(&doneq);
5530         mtx_lock(&queue->cam_doneq_mtx);
5531         while (1) {
5532                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5533                         queue->cam_doneq_sleep = 1;
5534                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5535                             PRIBIO, "-", 0);
5536                         queue->cam_doneq_sleep = 0;
5537                 }
5538                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5539                 mtx_unlock(&queue->cam_doneq_mtx);
5540
5541                 THREAD_NO_SLEEPING();
5542                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5543                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5544                         xpt_done_process(ccb_h);
5545                 }
5546                 THREAD_SLEEPING_OK();
5547
5548                 mtx_lock(&queue->cam_doneq_mtx);
5549         }
5550 }
5551
5552 static void
5553 camisr_runqueue(void)
5554 {
5555         struct  ccb_hdr *ccb_h;
5556         struct cam_doneq *queue;
5557         int i;
5558
5559         /* Process global queues. */
5560         for (i = 0; i < cam_num_doneqs; i++) {
5561                 queue = &cam_doneqs[i];
5562                 mtx_lock(&queue->cam_doneq_mtx);
5563                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5564                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5565                         mtx_unlock(&queue->cam_doneq_mtx);
5566                         xpt_done_process(ccb_h);
5567                         mtx_lock(&queue->cam_doneq_mtx);
5568                 }
5569                 mtx_unlock(&queue->cam_doneq_mtx);
5570         }
5571 }
5572
5573 struct kv
5574 {
5575         uint32_t v;
5576         const char *name;
5577 };
5578
5579 static struct kv map[] = {
5580         { XPT_NOOP, "XPT_NOOP" },
5581         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5582         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5583         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5584         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5585         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5586         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5587         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5588         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5589         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5590         { XPT_DEBUG, "XPT_DEBUG" },
5591         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5592         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5593         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5594         { XPT_ASYNC, "XPT_ASYNC" },
5595         { XPT_ABORT, "XPT_ABORT" },
5596         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5597         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5598         { XPT_TERM_IO, "XPT_TERM_IO" },
5599         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5600         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5601         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5602         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5603         { XPT_ATA_IO, "XPT_ATA_IO" },
5604         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5605         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5606         { XPT_NVME_IO, "XPT_NVME_IO" },
5607         { XPT_MMC_IO, "XPT_MMC_IO" },
5608         { XPT_SMP_IO, "XPT_SMP_IO" },
5609         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5610         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5611         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5612         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5613         { XPT_EN_LUN, "XPT_EN_LUN" },
5614         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5615         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5616         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5617         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5618         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5619         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5620         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5621         { 0, 0 }
5622 };
5623
5624 const char *
5625 xpt_action_name(uint32_t action)
5626 {
5627         static char buffer[32]; /* Only for unknown messages -- racy */
5628         struct kv *walker = map;
5629
5630         while (walker->name != NULL) {
5631                 if (walker->v == action)
5632                         return (walker->name);
5633                 walker++;
5634         }
5635
5636         snprintf(buffer, sizeof(buffer), "%#x", action);
5637         return (buffer);
5638 }