1 /*- 2 * Common functions for CAM "type" (peripheral) drivers. 3 * 4 * Copyright (c) 1997, 1998 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999, 2000 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/types.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/bio.h> 39 #include <sys/lock.h> 40 #include <sys/mutex.h> 41 #include <sys/buf.h> 42 #include <sys/proc.h> 43 #include <sys/devicestat.h> 44 #include <sys/bus.h> 45 #include <sys/sbuf.h> 46 #include <vm/vm.h> 47 #include <vm/vm_extern.h> 48 49 #include <cam/cam.h> 50 #include <cam/cam_ccb.h> 51 #include <cam/cam_queue.h> 52 #include <cam/cam_xpt_periph.h> 53 #include <cam/cam_periph.h> 54 #include <cam/cam_debug.h> 55 #include <cam/cam_sim.h> 56 57 #include <cam/scsi/scsi_all.h> 58 #include <cam/scsi/scsi_message.h> 59 #include <cam/scsi/scsi_pass.h> 60 61 static u_int camperiphnextunit(struct periph_driver *p_drv, 62 u_int newunit, int wired, 63 path_id_t pathid, target_id_t target, 64 lun_id_t lun); 65 static u_int camperiphunit(struct periph_driver *p_drv, 66 path_id_t pathid, target_id_t target, 67 lun_id_t lun); 68 static void camperiphdone(struct cam_periph *periph, 69 union ccb *done_ccb); 70 static void camperiphfree(struct cam_periph *periph); 71 static int camperiphscsistatuserror(union ccb *ccb, 72 union ccb **orig_ccb, 73 cam_flags camflags, 74 u_int32_t sense_flags, 75 int *openings, 76 u_int32_t *relsim_flags, 77 u_int32_t *timeout, 78 u_int32_t *action, 79 const char **action_string); 80 static int camperiphscsisenseerror(union ccb *ccb, 81 union ccb **orig_ccb, 82 cam_flags camflags, 83 u_int32_t sense_flags, 84 int *openings, 85 u_int32_t *relsim_flags, 86 u_int32_t *timeout, 87 u_int32_t *action, 88 const char **action_string); 89 static void cam_periph_devctl_notify(union ccb *ccb); 90 91 static int nperiph_drivers; 92 static int initialized = 0; 93 struct periph_driver **periph_drivers; 94 95 static MALLOC_DEFINE(M_CAMPERIPH, "CAM periph", "CAM peripheral buffers"); 96 97 static int periph_selto_delay = 1000; 98 TUNABLE_INT("kern.cam.periph_selto_delay", &periph_selto_delay); 99 static int periph_noresrc_delay = 500; 100 TUNABLE_INT("kern.cam.periph_noresrc_delay", &periph_noresrc_delay); 101 static int periph_busy_delay = 500; 102 TUNABLE_INT("kern.cam.periph_busy_delay", &periph_busy_delay); 103 104 105 void 106 periphdriver_register(void *data) 107 { 108 struct periph_driver *drv = (struct periph_driver *)data; 109 struct periph_driver **newdrivers, **old; 110 int ndrivers; 111 112 again: 113 ndrivers = nperiph_drivers + 2; 114 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_CAMPERIPH, 115 M_WAITOK); 116 xpt_lock_buses(); 117 if (ndrivers != nperiph_drivers + 2) { 118 /* 119 * Lost race against itself; go around. 120 */ 121 xpt_unlock_buses(); 122 free(newdrivers, M_CAMPERIPH); 123 goto again; 124 } 125 if (periph_drivers) 126 bcopy(periph_drivers, newdrivers, 127 sizeof(*newdrivers) * nperiph_drivers); 128 newdrivers[nperiph_drivers] = drv; 129 newdrivers[nperiph_drivers + 1] = NULL; 130 old = periph_drivers; 131 periph_drivers = newdrivers; 132 nperiph_drivers++; 133 xpt_unlock_buses(); 134 if (old) 135 free(old, M_CAMPERIPH); 136 /* If driver marked as early or it is late now, initialize it. */ 137 if (((drv->flags & CAM_PERIPH_DRV_EARLY) != 0 && initialized > 0) || 138 initialized > 1) 139 (*drv->init)(); 140 } 141 142 int 143 periphdriver_unregister(void *data) 144 { 145 struct periph_driver *drv = (struct periph_driver *)data; 146 int error, n; 147 148 /* If driver marked as early or it is late now, deinitialize it. */ 149 if (((drv->flags & CAM_PERIPH_DRV_EARLY) != 0 && initialized > 0) || 150 initialized > 1) { 151 if (drv->deinit == NULL) { 152 printf("CAM periph driver '%s' doesn't have deinit.\n", 153 drv->driver_name); 154 return (EOPNOTSUPP); 155 } 156 error = drv->deinit(); 157 if (error != 0) 158 return (error); 159 } 160 161 xpt_lock_buses(); 162 for (n = 0; n < nperiph_drivers && periph_drivers[n] != drv; n++) 163 ; 164 KASSERT(n < nperiph_drivers, 165 ("Periph driver '%s' was not registered", drv->driver_name)); 166 for (; n + 1 < nperiph_drivers; n++) 167 periph_drivers[n] = periph_drivers[n + 1]; 168 periph_drivers[n + 1] = NULL; 169 nperiph_drivers--; 170 xpt_unlock_buses(); 171 return (0); 172 } 173 174 void 175 periphdriver_init(int level) 176 { 177 int i, early; 178 179 initialized = max(initialized, level); 180 for (i = 0; periph_drivers[i] != NULL; i++) { 181 early = (periph_drivers[i]->flags & CAM_PERIPH_DRV_EARLY) ? 1 : 2; 182 if (early == initialized) 183 (*periph_drivers[i]->init)(); 184 } 185 } 186 187 cam_status 188 cam_periph_alloc(periph_ctor_t *periph_ctor, 189 periph_oninv_t *periph_oninvalidate, 190 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 191 char *name, cam_periph_type type, struct cam_path *path, 192 ac_callback_t *ac_callback, ac_code code, void *arg) 193 { 194 struct periph_driver **p_drv; 195 struct cam_sim *sim; 196 struct cam_periph *periph; 197 struct cam_periph *cur_periph; 198 path_id_t path_id; 199 target_id_t target_id; 200 lun_id_t lun_id; 201 cam_status status; 202 u_int init_level; 203 204 init_level = 0; 205 /* 206 * Handle Hot-Plug scenarios. If there is already a peripheral 207 * of our type assigned to this path, we are likely waiting for 208 * final close on an old, invalidated, peripheral. If this is 209 * the case, queue up a deferred call to the peripheral's async 210 * handler. If it looks like a mistaken re-allocation, complain. 211 */ 212 if ((periph = cam_periph_find(path, name)) != NULL) { 213 214 if ((periph->flags & CAM_PERIPH_INVALID) != 0 215 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 216 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 217 periph->deferred_callback = ac_callback; 218 periph->deferred_ac = code; 219 return (CAM_REQ_INPROG); 220 } else { 221 printf("cam_periph_alloc: attempt to re-allocate " 222 "valid device %s%d rejected flags %#x " 223 "refcount %d\n", periph->periph_name, 224 periph->unit_number, periph->flags, 225 periph->refcount); 226 } 227 return (CAM_REQ_INVALID); 228 } 229 230 periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH, 231 M_NOWAIT|M_ZERO); 232 233 if (periph == NULL) 234 return (CAM_RESRC_UNAVAIL); 235 236 init_level++; 237 238 239 sim = xpt_path_sim(path); 240 path_id = xpt_path_path_id(path); 241 target_id = xpt_path_target_id(path); 242 lun_id = xpt_path_lun_id(path); 243 periph->periph_start = periph_start; 244 periph->periph_dtor = periph_dtor; 245 periph->periph_oninval = periph_oninvalidate; 246 periph->type = type; 247 periph->periph_name = name; 248 periph->scheduled_priority = CAM_PRIORITY_NONE; 249 periph->immediate_priority = CAM_PRIORITY_NONE; 250 periph->refcount = 1; /* Dropped by invalidation. */ 251 periph->sim = sim; 252 SLIST_INIT(&periph->ccb_list); 253 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 254 if (status != CAM_REQ_CMP) 255 goto failure; 256 periph->path = path; 257 258 xpt_lock_buses(); 259 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 260 if (strcmp((*p_drv)->driver_name, name) == 0) 261 break; 262 } 263 if (*p_drv == NULL) { 264 printf("cam_periph_alloc: invalid periph name '%s'\n", name); 265 xpt_unlock_buses(); 266 xpt_free_path(periph->path); 267 free(periph, M_CAMPERIPH); 268 return (CAM_REQ_INVALID); 269 } 270 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 271 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 272 while (cur_periph != NULL 273 && cur_periph->unit_number < periph->unit_number) 274 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 275 if (cur_periph != NULL) { 276 KASSERT(cur_periph->unit_number != periph->unit_number, ("duplicate units on periph list")); 277 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 278 } else { 279 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 280 (*p_drv)->generation++; 281 } 282 xpt_unlock_buses(); 283 284 init_level++; 285 286 status = xpt_add_periph(periph); 287 if (status != CAM_REQ_CMP) 288 goto failure; 289 290 init_level++; 291 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph created\n")); 292 293 status = periph_ctor(periph, arg); 294 295 if (status == CAM_REQ_CMP) 296 init_level++; 297 298 failure: 299 switch (init_level) { 300 case 4: 301 /* Initialized successfully */ 302 break; 303 case 3: 304 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n")); 305 xpt_remove_periph(periph); 306 /* FALLTHROUGH */ 307 case 2: 308 xpt_lock_buses(); 309 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 310 xpt_unlock_buses(); 311 xpt_free_path(periph->path); 312 /* FALLTHROUGH */ 313 case 1: 314 free(periph, M_CAMPERIPH); 315 /* FALLTHROUGH */ 316 case 0: 317 /* No cleanup to perform. */ 318 break; 319 default: 320 panic("%s: Unknown init level", __func__); 321 } 322 return(status); 323 } 324 325 /* 326 * Find a peripheral structure with the specified path, target, lun, 327 * and (optionally) type. If the name is NULL, this function will return 328 * the first peripheral driver that matches the specified path. 329 */ 330 struct cam_periph * 331 cam_periph_find(struct cam_path *path, char *name) 332 { 333 struct periph_driver **p_drv; 334 struct cam_periph *periph; 335 336 xpt_lock_buses(); 337 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 338 339 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 340 continue; 341 342 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 343 if (xpt_path_comp(periph->path, path) == 0) { 344 xpt_unlock_buses(); 345 cam_periph_assert(periph, MA_OWNED); 346 return(periph); 347 } 348 } 349 if (name != NULL) { 350 xpt_unlock_buses(); 351 return(NULL); 352 } 353 } 354 xpt_unlock_buses(); 355 return(NULL); 356 } 357 358 /* 359 * Find peripheral driver instances attached to the specified path. 360 */ 361 int 362 cam_periph_list(struct cam_path *path, struct sbuf *sb) 363 { 364 struct sbuf local_sb; 365 struct periph_driver **p_drv; 366 struct cam_periph *periph; 367 int count; 368 int sbuf_alloc_len; 369 370 sbuf_alloc_len = 16; 371 retry: 372 sbuf_new(&local_sb, NULL, sbuf_alloc_len, SBUF_FIXEDLEN); 373 count = 0; 374 xpt_lock_buses(); 375 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 376 377 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 378 if (xpt_path_comp(periph->path, path) != 0) 379 continue; 380 381 if (sbuf_len(&local_sb) != 0) 382 sbuf_cat(&local_sb, ","); 383 384 sbuf_printf(&local_sb, "%s%d", periph->periph_name, 385 periph->unit_number); 386 387 if (sbuf_error(&local_sb) == ENOMEM) { 388 sbuf_alloc_len *= 2; 389 xpt_unlock_buses(); 390 sbuf_delete(&local_sb); 391 goto retry; 392 } 393 count++; 394 } 395 } 396 xpt_unlock_buses(); 397 sbuf_finish(&local_sb); 398 sbuf_cpy(sb, sbuf_data(&local_sb)); 399 sbuf_delete(&local_sb); 400 return (count); 401 } 402 403 cam_status 404 cam_periph_acquire(struct cam_periph *periph) 405 { 406 cam_status status; 407 408 status = CAM_REQ_CMP_ERR; 409 if (periph == NULL) 410 return (status); 411 412 xpt_lock_buses(); 413 if ((periph->flags & CAM_PERIPH_INVALID) == 0) { 414 periph->refcount++; 415 status = CAM_REQ_CMP; 416 } 417 xpt_unlock_buses(); 418 419 return (status); 420 } 421 422 void 423 cam_periph_doacquire(struct cam_periph *periph) 424 { 425 426 xpt_lock_buses(); 427 KASSERT(periph->refcount >= 1, 428 ("cam_periph_doacquire() with refcount == %d", periph->refcount)); 429 periph->refcount++; 430 xpt_unlock_buses(); 431 } 432 433 void 434 cam_periph_release_locked_buses(struct cam_periph *periph) 435 { 436 437 cam_periph_assert(periph, MA_OWNED); 438 KASSERT(periph->refcount >= 1, ("periph->refcount >= 1")); 439 if (--periph->refcount == 0) 440 camperiphfree(periph); 441 } 442 443 void 444 cam_periph_release_locked(struct cam_periph *periph) 445 { 446 447 if (periph == NULL) 448 return; 449 450 xpt_lock_buses(); 451 cam_periph_release_locked_buses(periph); 452 xpt_unlock_buses(); 453 } 454 455 void 456 cam_periph_release(struct cam_periph *periph) 457 { 458 struct mtx *mtx; 459 460 if (periph == NULL) 461 return; 462 463 cam_periph_assert(periph, MA_NOTOWNED); 464 mtx = cam_periph_mtx(periph); 465 mtx_lock(mtx); 466 cam_periph_release_locked(periph); 467 mtx_unlock(mtx); 468 } 469 470 int 471 cam_periph_hold(struct cam_periph *periph, int priority) 472 { 473 int error; 474 475 /* 476 * Increment the reference count on the peripheral 477 * while we wait for our lock attempt to succeed 478 * to ensure the peripheral doesn't disappear out 479 * from user us while we sleep. 480 */ 481 482 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 483 return (ENXIO); 484 485 cam_periph_assert(periph, MA_OWNED); 486 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 487 periph->flags |= CAM_PERIPH_LOCK_WANTED; 488 if ((error = cam_periph_sleep(periph, periph, priority, 489 "caplck", 0)) != 0) { 490 cam_periph_release_locked(periph); 491 return (error); 492 } 493 if (periph->flags & CAM_PERIPH_INVALID) { 494 cam_periph_release_locked(periph); 495 return (ENXIO); 496 } 497 } 498 499 periph->flags |= CAM_PERIPH_LOCKED; 500 return (0); 501 } 502 503 void 504 cam_periph_unhold(struct cam_periph *periph) 505 { 506 507 cam_periph_assert(periph, MA_OWNED); 508 509 periph->flags &= ~CAM_PERIPH_LOCKED; 510 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 511 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 512 wakeup(periph); 513 } 514 515 cam_periph_release_locked(periph); 516 } 517 518 /* 519 * Look for the next unit number that is not currently in use for this 520 * peripheral type starting at "newunit". Also exclude unit numbers that 521 * are reserved by for future "hardwiring" unless we already know that this 522 * is a potential wired device. Only assume that the device is "wired" the 523 * first time through the loop since after that we'll be looking at unit 524 * numbers that did not match a wiring entry. 525 */ 526 static u_int 527 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired, 528 path_id_t pathid, target_id_t target, lun_id_t lun) 529 { 530 struct cam_periph *periph; 531 char *periph_name; 532 int i, val, dunit, r; 533 const char *dname, *strval; 534 535 periph_name = p_drv->driver_name; 536 for (;;newunit++) { 537 538 for (periph = TAILQ_FIRST(&p_drv->units); 539 periph != NULL && periph->unit_number != newunit; 540 periph = TAILQ_NEXT(periph, unit_links)) 541 ; 542 543 if (periph != NULL && periph->unit_number == newunit) { 544 if (wired != 0) { 545 xpt_print(periph->path, "Duplicate Wired " 546 "Device entry!\n"); 547 xpt_print(periph->path, "Second device (%s " 548 "device at scbus%d target %d lun %d) will " 549 "not be wired\n", periph_name, pathid, 550 target, lun); 551 wired = 0; 552 } 553 continue; 554 } 555 if (wired) 556 break; 557 558 /* 559 * Don't match entries like "da 4" as a wired down 560 * device, but do match entries like "da 4 target 5" 561 * or even "da 4 scbus 1". 562 */ 563 i = 0; 564 dname = periph_name; 565 for (;;) { 566 r = resource_find_dev(&i, dname, &dunit, NULL, NULL); 567 if (r != 0) 568 break; 569 /* if no "target" and no specific scbus, skip */ 570 if (resource_int_value(dname, dunit, "target", &val) && 571 (resource_string_value(dname, dunit, "at",&strval)|| 572 strcmp(strval, "scbus") == 0)) 573 continue; 574 if (newunit == dunit) 575 break; 576 } 577 if (r != 0) 578 break; 579 } 580 return (newunit); 581 } 582 583 static u_int 584 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 585 target_id_t target, lun_id_t lun) 586 { 587 u_int unit; 588 int wired, i, val, dunit; 589 const char *dname, *strval; 590 char pathbuf[32], *periph_name; 591 592 periph_name = p_drv->driver_name; 593 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid); 594 unit = 0; 595 i = 0; 596 dname = periph_name; 597 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0; 598 wired = 0) { 599 if (resource_string_value(dname, dunit, "at", &strval) == 0) { 600 if (strcmp(strval, pathbuf) != 0) 601 continue; 602 wired++; 603 } 604 if (resource_int_value(dname, dunit, "target", &val) == 0) { 605 if (val != target) 606 continue; 607 wired++; 608 } 609 if (resource_int_value(dname, dunit, "lun", &val) == 0) { 610 if (val != lun) 611 continue; 612 wired++; 613 } 614 if (wired != 0) { 615 unit = dunit; 616 break; 617 } 618 } 619 620 /* 621 * Either start from 0 looking for the next unit or from 622 * the unit number given in the resource config. This way, 623 * if we have wildcard matches, we don't return the same 624 * unit number twice. 625 */ 626 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun); 627 628 return (unit); 629 } 630 631 void 632 cam_periph_invalidate(struct cam_periph *periph) 633 { 634 635 cam_periph_assert(periph, MA_OWNED); 636 /* 637 * We only call this routine the first time a peripheral is 638 * invalidated. 639 */ 640 if ((periph->flags & CAM_PERIPH_INVALID) != 0) 641 return; 642 643 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph invalidated\n")); 644 if ((periph->flags & CAM_PERIPH_ANNOUNCED) && !rebooting) { 645 struct sbuf sb; 646 char buffer[160]; 647 648 sbuf_new(&sb, buffer, 160, SBUF_FIXEDLEN); 649 xpt_denounce_periph_sbuf(periph, &sb); 650 sbuf_finish(&sb); 651 sbuf_putbuf(&sb); 652 } 653 periph->flags |= CAM_PERIPH_INVALID; 654 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 655 if (periph->periph_oninval != NULL) 656 periph->periph_oninval(periph); 657 cam_periph_release_locked(periph); 658 } 659 660 static void 661 camperiphfree(struct cam_periph *periph) 662 { 663 struct periph_driver **p_drv; 664 665 cam_periph_assert(periph, MA_OWNED); 666 KASSERT(periph->periph_allocating == 0, ("%s%d: freed while allocating", 667 periph->periph_name, periph->unit_number)); 668 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 669 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 670 break; 671 } 672 if (*p_drv == NULL) { 673 printf("camperiphfree: attempt to free non-existant periph\n"); 674 return; 675 } 676 677 /* 678 * We need to set this flag before dropping the topology lock, to 679 * let anyone who is traversing the list that this peripheral is 680 * about to be freed, and there will be no more reference count 681 * checks. 682 */ 683 periph->flags |= CAM_PERIPH_FREE; 684 685 /* 686 * The peripheral destructor semantics dictate calling with only the 687 * SIM mutex held. Since it might sleep, it should not be called 688 * with the topology lock held. 689 */ 690 xpt_unlock_buses(); 691 692 /* 693 * We need to call the peripheral destructor prior to removing the 694 * peripheral from the list. Otherwise, we risk running into a 695 * scenario where the peripheral unit number may get reused 696 * (because it has been removed from the list), but some resources 697 * used by the peripheral are still hanging around. In particular, 698 * the devfs nodes used by some peripherals like the pass(4) driver 699 * aren't fully cleaned up until the destructor is run. If the 700 * unit number is reused before the devfs instance is fully gone, 701 * devfs will panic. 702 */ 703 if (periph->periph_dtor != NULL) 704 periph->periph_dtor(periph); 705 706 /* 707 * The peripheral list is protected by the topology lock. 708 */ 709 xpt_lock_buses(); 710 711 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 712 (*p_drv)->generation++; 713 714 xpt_remove_periph(periph); 715 716 xpt_unlock_buses(); 717 if ((periph->flags & CAM_PERIPH_ANNOUNCED) && !rebooting) 718 xpt_print(periph->path, "Periph destroyed\n"); 719 else 720 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n")); 721 722 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 723 union ccb ccb; 724 void *arg; 725 726 switch (periph->deferred_ac) { 727 case AC_FOUND_DEVICE: 728 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 729 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 730 xpt_action(&ccb); 731 arg = &ccb; 732 break; 733 case AC_PATH_REGISTERED: 734 ccb.ccb_h.func_code = XPT_PATH_INQ; 735 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 736 xpt_action(&ccb); 737 arg = &ccb; 738 break; 739 default: 740 arg = NULL; 741 break; 742 } 743 periph->deferred_callback(NULL, periph->deferred_ac, 744 periph->path, arg); 745 } 746 xpt_free_path(periph->path); 747 free(periph, M_CAMPERIPH); 748 xpt_lock_buses(); 749 } 750 751 /* 752 * Map user virtual pointers into kernel virtual address space, so we can 753 * access the memory. This is now a generic function that centralizes most 754 * of the sanity checks on the data flags, if any. 755 * This also only works for up to MAXPHYS memory. Since we use 756 * buffers to map stuff in and out, we're limited to the buffer size. 757 */ 758 int 759 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo, 760 u_int maxmap) 761 { 762 int numbufs, i, j; 763 int flags[CAM_PERIPH_MAXMAPS]; 764 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 765 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 766 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 767 768 if (maxmap == 0) 769 maxmap = DFLTPHYS; /* traditional default */ 770 else if (maxmap > MAXPHYS) 771 maxmap = MAXPHYS; /* for safety */ 772 switch(ccb->ccb_h.func_code) { 773 case XPT_DEV_MATCH: 774 if (ccb->cdm.match_buf_len == 0) { 775 printf("cam_periph_mapmem: invalid match buffer " 776 "length 0\n"); 777 return(EINVAL); 778 } 779 if (ccb->cdm.pattern_buf_len > 0) { 780 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 781 lengths[0] = ccb->cdm.pattern_buf_len; 782 dirs[0] = CAM_DIR_OUT; 783 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 784 lengths[1] = ccb->cdm.match_buf_len; 785 dirs[1] = CAM_DIR_IN; 786 numbufs = 2; 787 } else { 788 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 789 lengths[0] = ccb->cdm.match_buf_len; 790 dirs[0] = CAM_DIR_IN; 791 numbufs = 1; 792 } 793 /* 794 * This request will not go to the hardware, no reason 795 * to be so strict. vmapbuf() is able to map up to MAXPHYS. 796 */ 797 maxmap = MAXPHYS; 798 break; 799 case XPT_SCSI_IO: 800 case XPT_CONT_TARGET_IO: 801 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 802 return(0); 803 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR) 804 return (EINVAL); 805 data_ptrs[0] = &ccb->csio.data_ptr; 806 lengths[0] = ccb->csio.dxfer_len; 807 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 808 numbufs = 1; 809 break; 810 case XPT_ATA_IO: 811 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 812 return(0); 813 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR) 814 return (EINVAL); 815 data_ptrs[0] = &ccb->ataio.data_ptr; 816 lengths[0] = ccb->ataio.dxfer_len; 817 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 818 numbufs = 1; 819 break; 820 case XPT_SMP_IO: 821 data_ptrs[0] = &ccb->smpio.smp_request; 822 lengths[0] = ccb->smpio.smp_request_len; 823 dirs[0] = CAM_DIR_OUT; 824 data_ptrs[1] = &ccb->smpio.smp_response; 825 lengths[1] = ccb->smpio.smp_response_len; 826 dirs[1] = CAM_DIR_IN; 827 numbufs = 2; 828 break; 829 case XPT_DEV_ADVINFO: 830 if (ccb->cdai.bufsiz == 0) 831 return (0); 832 833 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf; 834 lengths[0] = ccb->cdai.bufsiz; 835 dirs[0] = CAM_DIR_IN; 836 numbufs = 1; 837 838 /* 839 * This request will not go to the hardware, no reason 840 * to be so strict. vmapbuf() is able to map up to MAXPHYS. 841 */ 842 maxmap = MAXPHYS; 843 break; 844 default: 845 return(EINVAL); 846 break; /* NOTREACHED */ 847 } 848 849 /* 850 * Check the transfer length and permissions first, so we don't 851 * have to unmap any previously mapped buffers. 852 */ 853 for (i = 0; i < numbufs; i++) { 854 855 flags[i] = 0; 856 857 /* 858 * The userland data pointer passed in may not be page 859 * aligned. vmapbuf() truncates the address to a page 860 * boundary, so if the address isn't page aligned, we'll 861 * need enough space for the given transfer length, plus 862 * whatever extra space is necessary to make it to the page 863 * boundary. 864 */ 865 if ((lengths[i] + 866 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > maxmap){ 867 printf("cam_periph_mapmem: attempt to map %lu bytes, " 868 "which is greater than %lu\n", 869 (long)(lengths[i] + 870 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 871 (u_long)maxmap); 872 return(E2BIG); 873 } 874 875 if (dirs[i] & CAM_DIR_OUT) { 876 flags[i] = BIO_WRITE; 877 } 878 879 if (dirs[i] & CAM_DIR_IN) { 880 flags[i] = BIO_READ; 881 } 882 883 } 884 885 /* 886 * This keeps the kernel stack of current thread from getting 887 * swapped. In low-memory situations where the kernel stack might 888 * otherwise get swapped out, this holds it and allows the thread 889 * to make progress and release the kernel mapped pages sooner. 890 * 891 * XXX KDM should I use P_NOSWAP instead? 892 */ 893 PHOLD(curproc); 894 895 for (i = 0; i < numbufs; i++) { 896 /* 897 * Get the buffer. 898 */ 899 mapinfo->bp[i] = getpbuf(NULL); 900 901 /* put our pointer in the data slot */ 902 mapinfo->bp[i]->b_data = *data_ptrs[i]; 903 904 /* save the user's data address */ 905 mapinfo->bp[i]->b_caller1 = *data_ptrs[i]; 906 907 /* set the transfer length, we know it's < MAXPHYS */ 908 mapinfo->bp[i]->b_bufsize = lengths[i]; 909 910 /* set the direction */ 911 mapinfo->bp[i]->b_iocmd = flags[i]; 912 913 /* 914 * Map the buffer into kernel memory. 915 * 916 * Note that useracc() alone is not a sufficient test. 917 * vmapbuf() can still fail due to a smaller file mapped 918 * into a larger area of VM, or if userland races against 919 * vmapbuf() after the useracc() check. 920 */ 921 if (vmapbuf(mapinfo->bp[i], 1) < 0) { 922 for (j = 0; j < i; ++j) { 923 *data_ptrs[j] = mapinfo->bp[j]->b_caller1; 924 vunmapbuf(mapinfo->bp[j]); 925 relpbuf(mapinfo->bp[j], NULL); 926 } 927 relpbuf(mapinfo->bp[i], NULL); 928 PRELE(curproc); 929 return(EACCES); 930 } 931 932 /* set our pointer to the new mapped area */ 933 *data_ptrs[i] = mapinfo->bp[i]->b_data; 934 935 mapinfo->num_bufs_used++; 936 } 937 938 /* 939 * Now that we've gotten this far, change ownership to the kernel 940 * of the buffers so that we don't run afoul of returning to user 941 * space with locks (on the buffer) held. 942 */ 943 for (i = 0; i < numbufs; i++) { 944 BUF_KERNPROC(mapinfo->bp[i]); 945 } 946 947 948 return(0); 949 } 950 951 /* 952 * Unmap memory segments mapped into kernel virtual address space by 953 * cam_periph_mapmem(). 954 */ 955 void 956 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 957 { 958 int numbufs, i; 959 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 960 961 if (mapinfo->num_bufs_used <= 0) { 962 /* nothing to free and the process wasn't held. */ 963 return; 964 } 965 966 switch (ccb->ccb_h.func_code) { 967 case XPT_DEV_MATCH: 968 numbufs = min(mapinfo->num_bufs_used, 2); 969 970 if (numbufs == 1) { 971 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 972 } else { 973 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 974 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 975 } 976 break; 977 case XPT_SCSI_IO: 978 case XPT_CONT_TARGET_IO: 979 data_ptrs[0] = &ccb->csio.data_ptr; 980 numbufs = min(mapinfo->num_bufs_used, 1); 981 break; 982 case XPT_ATA_IO: 983 data_ptrs[0] = &ccb->ataio.data_ptr; 984 numbufs = min(mapinfo->num_bufs_used, 1); 985 break; 986 case XPT_SMP_IO: 987 numbufs = min(mapinfo->num_bufs_used, 2); 988 data_ptrs[0] = &ccb->smpio.smp_request; 989 data_ptrs[1] = &ccb->smpio.smp_response; 990 break; 991 case XPT_DEV_ADVINFO: 992 numbufs = min(mapinfo->num_bufs_used, 1); 993 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf; 994 break; 995 default: 996 /* allow ourselves to be swapped once again */ 997 PRELE(curproc); 998 return; 999 break; /* NOTREACHED */ 1000 } 1001 1002 for (i = 0; i < numbufs; i++) { 1003 /* Set the user's pointer back to the original value */ 1004 *data_ptrs[i] = mapinfo->bp[i]->b_caller1; 1005 1006 /* unmap the buffer */ 1007 vunmapbuf(mapinfo->bp[i]); 1008 1009 /* release the buffer */ 1010 relpbuf(mapinfo->bp[i], NULL); 1011 } 1012 1013 /* allow ourselves to be swapped once again */ 1014 PRELE(curproc); 1015 } 1016 1017 int 1018 cam_periph_ioctl(struct cam_periph *periph, u_long cmd, caddr_t addr, 1019 int (*error_routine)(union ccb *ccb, 1020 cam_flags camflags, 1021 u_int32_t sense_flags)) 1022 { 1023 union ccb *ccb; 1024 int error; 1025 int found; 1026 1027 error = found = 0; 1028 1029 switch(cmd){ 1030 case CAMGETPASSTHRU: 1031 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 1032 xpt_setup_ccb(&ccb->ccb_h, 1033 ccb->ccb_h.path, 1034 CAM_PRIORITY_NORMAL); 1035 ccb->ccb_h.func_code = XPT_GDEVLIST; 1036 1037 /* 1038 * Basically, the point of this is that we go through 1039 * getting the list of devices, until we find a passthrough 1040 * device. In the current version of the CAM code, the 1041 * only way to determine what type of device we're dealing 1042 * with is by its name. 1043 */ 1044 while (found == 0) { 1045 ccb->cgdl.index = 0; 1046 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 1047 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 1048 1049 /* we want the next device in the list */ 1050 xpt_action(ccb); 1051 if (strncmp(ccb->cgdl.periph_name, 1052 "pass", 4) == 0){ 1053 found = 1; 1054 break; 1055 } 1056 } 1057 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 1058 (found == 0)) { 1059 ccb->cgdl.periph_name[0] = '\0'; 1060 ccb->cgdl.unit_number = 0; 1061 break; 1062 } 1063 } 1064 1065 /* copy the result back out */ 1066 bcopy(ccb, addr, sizeof(union ccb)); 1067 1068 /* and release the ccb */ 1069 xpt_release_ccb(ccb); 1070 1071 break; 1072 default: 1073 error = ENOTTY; 1074 break; 1075 } 1076 return(error); 1077 } 1078 1079 static void 1080 cam_periph_done_panic(struct cam_periph *periph, union ccb *done_ccb) 1081 { 1082 1083 panic("%s: already done with ccb %p", __func__, done_ccb); 1084 } 1085 1086 static void 1087 cam_periph_done(struct cam_periph *periph, union ccb *done_ccb) 1088 { 1089 1090 /* Caller will release the CCB */ 1091 xpt_path_assert(done_ccb->ccb_h.path, MA_OWNED); 1092 done_ccb->ccb_h.cbfcnp = cam_periph_done_panic; 1093 wakeup(&done_ccb->ccb_h.cbfcnp); 1094 } 1095 1096 static void 1097 cam_periph_ccbwait(union ccb *ccb) 1098 { 1099 1100 if ((ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 1101 while (ccb->ccb_h.cbfcnp != cam_periph_done_panic) 1102 xpt_path_sleep(ccb->ccb_h.path, &ccb->ccb_h.cbfcnp, 1103 PRIBIO, "cbwait", 0); 1104 } 1105 KASSERT(ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX && 1106 (ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG, 1107 ("%s: proceeding with incomplete ccb: ccb=%p, func_code=%#x, " 1108 "status=%#x, index=%d", __func__, ccb, ccb->ccb_h.func_code, 1109 ccb->ccb_h.status, ccb->ccb_h.pinfo.index)); 1110 } 1111 1112 int 1113 cam_periph_runccb(union ccb *ccb, 1114 int (*error_routine)(union ccb *ccb, 1115 cam_flags camflags, 1116 u_int32_t sense_flags), 1117 cam_flags camflags, u_int32_t sense_flags, 1118 struct devstat *ds) 1119 { 1120 struct bintime *starttime; 1121 struct bintime ltime; 1122 int error; 1123 1124 starttime = NULL; 1125 xpt_path_assert(ccb->ccb_h.path, MA_OWNED); 1126 KASSERT((ccb->ccb_h.flags & CAM_UNLOCKED) == 0, 1127 ("%s: ccb=%p, func_code=%#x, flags=%#x", __func__, ccb, 1128 ccb->ccb_h.func_code, ccb->ccb_h.flags)); 1129 1130 /* 1131 * If the user has supplied a stats structure, and if we understand 1132 * this particular type of ccb, record the transaction start. 1133 */ 1134 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO || 1135 ccb->ccb_h.func_code == XPT_ATA_IO)) { 1136 starttime = <ime; 1137 binuptime(starttime); 1138 devstat_start_transaction(ds, starttime); 1139 } 1140 1141 ccb->ccb_h.cbfcnp = cam_periph_done; 1142 xpt_action(ccb); 1143 1144 do { 1145 cam_periph_ccbwait(ccb); 1146 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 1147 error = 0; 1148 else if (error_routine != NULL) { 1149 ccb->ccb_h.cbfcnp = cam_periph_done; 1150 error = (*error_routine)(ccb, camflags, sense_flags); 1151 } else 1152 error = 0; 1153 1154 } while (error == ERESTART); 1155 1156 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 1157 cam_release_devq(ccb->ccb_h.path, 1158 /* relsim_flags */0, 1159 /* openings */0, 1160 /* timeout */0, 1161 /* getcount_only */ FALSE); 1162 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1163 } 1164 1165 if (ds != NULL) { 1166 if (ccb->ccb_h.func_code == XPT_SCSI_IO) { 1167 devstat_end_transaction(ds, 1168 ccb->csio.dxfer_len - ccb->csio.resid, 1169 ccb->csio.tag_action & 0x3, 1170 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 1171 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 1172 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1173 DEVSTAT_WRITE : 1174 DEVSTAT_READ, NULL, starttime); 1175 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) { 1176 devstat_end_transaction(ds, 1177 ccb->ataio.dxfer_len - ccb->ataio.resid, 1178 0, /* Not used in ATA */ 1179 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 1180 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 1181 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1182 DEVSTAT_WRITE : 1183 DEVSTAT_READ, NULL, starttime); 1184 } 1185 } 1186 1187 return(error); 1188 } 1189 1190 void 1191 cam_freeze_devq(struct cam_path *path) 1192 { 1193 struct ccb_hdr ccb_h; 1194 1195 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_freeze_devq\n")); 1196 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 1197 ccb_h.func_code = XPT_NOOP; 1198 ccb_h.flags = CAM_DEV_QFREEZE; 1199 xpt_action((union ccb *)&ccb_h); 1200 } 1201 1202 u_int32_t 1203 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 1204 u_int32_t openings, u_int32_t arg, 1205 int getcount_only) 1206 { 1207 struct ccb_relsim crs; 1208 1209 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_release_devq(%u, %u, %u, %d)\n", 1210 relsim_flags, openings, arg, getcount_only)); 1211 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 1212 crs.ccb_h.func_code = XPT_REL_SIMQ; 1213 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 1214 crs.release_flags = relsim_flags; 1215 crs.openings = openings; 1216 crs.release_timeout = arg; 1217 xpt_action((union ccb *)&crs); 1218 return (crs.qfrozen_cnt); 1219 } 1220 1221 #define saved_ccb_ptr ppriv_ptr0 1222 static void 1223 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 1224 { 1225 union ccb *saved_ccb; 1226 cam_status status; 1227 struct scsi_start_stop_unit *scsi_cmd; 1228 int error_code, sense_key, asc, ascq; 1229 1230 scsi_cmd = (struct scsi_start_stop_unit *) 1231 &done_ccb->csio.cdb_io.cdb_bytes; 1232 status = done_ccb->ccb_h.status; 1233 1234 if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1235 if (scsi_extract_sense_ccb(done_ccb, 1236 &error_code, &sense_key, &asc, &ascq)) { 1237 /* 1238 * If the error is "invalid field in CDB", 1239 * and the load/eject flag is set, turn the 1240 * flag off and try again. This is just in 1241 * case the drive in question barfs on the 1242 * load eject flag. The CAM code should set 1243 * the load/eject flag by default for 1244 * removable media. 1245 */ 1246 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1247 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1248 (asc == 0x24) && (ascq == 0x00)) { 1249 scsi_cmd->how &= ~SSS_LOEJ; 1250 if (status & CAM_DEV_QFRZN) { 1251 cam_release_devq(done_ccb->ccb_h.path, 1252 0, 0, 0, 0); 1253 done_ccb->ccb_h.status &= 1254 ~CAM_DEV_QFRZN; 1255 } 1256 xpt_action(done_ccb); 1257 goto out; 1258 } 1259 } 1260 if (cam_periph_error(done_ccb, 1261 0, SF_RETRY_UA | SF_NO_PRINT, NULL) == ERESTART) 1262 goto out; 1263 if (done_ccb->ccb_h.status & CAM_DEV_QFRZN) { 1264 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1265 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1266 } 1267 } else { 1268 /* 1269 * If we have successfully taken a device from the not 1270 * ready to ready state, re-scan the device and re-get 1271 * the inquiry information. Many devices (mostly disks) 1272 * don't properly report their inquiry information unless 1273 * they are spun up. 1274 */ 1275 if (scsi_cmd->opcode == START_STOP_UNIT) 1276 xpt_async(AC_INQ_CHANGED, done_ccb->ccb_h.path, NULL); 1277 } 1278 1279 /* 1280 * Perform the final retry with the original CCB so that final 1281 * error processing is performed by the owner of the CCB. 1282 */ 1283 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 1284 bcopy(saved_ccb, done_ccb, sizeof(*done_ccb)); 1285 xpt_free_ccb(saved_ccb); 1286 if (done_ccb->ccb_h.cbfcnp != camperiphdone) 1287 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1288 xpt_action(done_ccb); 1289 1290 out: 1291 /* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */ 1292 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1293 } 1294 1295 /* 1296 * Generic Async Event handler. Peripheral drivers usually 1297 * filter out the events that require personal attention, 1298 * and leave the rest to this function. 1299 */ 1300 void 1301 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1302 struct cam_path *path, void *arg) 1303 { 1304 switch (code) { 1305 case AC_LOST_DEVICE: 1306 cam_periph_invalidate(periph); 1307 break; 1308 default: 1309 break; 1310 } 1311 } 1312 1313 void 1314 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1315 { 1316 struct ccb_getdevstats cgds; 1317 1318 xpt_setup_ccb(&cgds.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 1319 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1320 xpt_action((union ccb *)&cgds); 1321 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1322 } 1323 1324 void 1325 cam_periph_freeze_after_event(struct cam_periph *periph, 1326 struct timeval* event_time, u_int duration_ms) 1327 { 1328 struct timeval delta; 1329 struct timeval duration_tv; 1330 1331 if (!timevalisset(event_time)) 1332 return; 1333 1334 microtime(&delta); 1335 timevalsub(&delta, event_time); 1336 duration_tv.tv_sec = duration_ms / 1000; 1337 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1338 if (timevalcmp(&delta, &duration_tv, <)) { 1339 timevalsub(&duration_tv, &delta); 1340 1341 duration_ms = duration_tv.tv_sec * 1000; 1342 duration_ms += duration_tv.tv_usec / 1000; 1343 cam_freeze_devq(periph->path); 1344 cam_release_devq(periph->path, 1345 RELSIM_RELEASE_AFTER_TIMEOUT, 1346 /*reduction*/0, 1347 /*timeout*/duration_ms, 1348 /*getcount_only*/0); 1349 } 1350 1351 } 1352 1353 static int 1354 camperiphscsistatuserror(union ccb *ccb, union ccb **orig_ccb, 1355 cam_flags camflags, u_int32_t sense_flags, 1356 int *openings, u_int32_t *relsim_flags, 1357 u_int32_t *timeout, u_int32_t *action, const char **action_string) 1358 { 1359 int error; 1360 1361 switch (ccb->csio.scsi_status) { 1362 case SCSI_STATUS_OK: 1363 case SCSI_STATUS_COND_MET: 1364 case SCSI_STATUS_INTERMED: 1365 case SCSI_STATUS_INTERMED_COND_MET: 1366 error = 0; 1367 break; 1368 case SCSI_STATUS_CMD_TERMINATED: 1369 case SCSI_STATUS_CHECK_COND: 1370 error = camperiphscsisenseerror(ccb, orig_ccb, 1371 camflags, 1372 sense_flags, 1373 openings, 1374 relsim_flags, 1375 timeout, 1376 action, 1377 action_string); 1378 break; 1379 case SCSI_STATUS_QUEUE_FULL: 1380 { 1381 /* no decrement */ 1382 struct ccb_getdevstats cgds; 1383 1384 /* 1385 * First off, find out what the current 1386 * transaction counts are. 1387 */ 1388 xpt_setup_ccb(&cgds.ccb_h, 1389 ccb->ccb_h.path, 1390 CAM_PRIORITY_NORMAL); 1391 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1392 xpt_action((union ccb *)&cgds); 1393 1394 /* 1395 * If we were the only transaction active, treat 1396 * the QUEUE FULL as if it were a BUSY condition. 1397 */ 1398 if (cgds.dev_active != 0) { 1399 int total_openings; 1400 1401 /* 1402 * Reduce the number of openings to 1403 * be 1 less than the amount it took 1404 * to get a queue full bounded by the 1405 * minimum allowed tag count for this 1406 * device. 1407 */ 1408 total_openings = cgds.dev_active + cgds.dev_openings; 1409 *openings = cgds.dev_active; 1410 if (*openings < cgds.mintags) 1411 *openings = cgds.mintags; 1412 if (*openings < total_openings) 1413 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1414 else { 1415 /* 1416 * Some devices report queue full for 1417 * temporary resource shortages. For 1418 * this reason, we allow a minimum 1419 * tag count to be entered via a 1420 * quirk entry to prevent the queue 1421 * count on these devices from falling 1422 * to a pessimisticly low value. We 1423 * still wait for the next successful 1424 * completion, however, before queueing 1425 * more transactions to the device. 1426 */ 1427 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1428 } 1429 *timeout = 0; 1430 error = ERESTART; 1431 *action &= ~SSQ_PRINT_SENSE; 1432 break; 1433 } 1434 /* FALLTHROUGH */ 1435 } 1436 case SCSI_STATUS_BUSY: 1437 /* 1438 * Restart the queue after either another 1439 * command completes or a 1 second timeout. 1440 */ 1441 if ((sense_flags & SF_RETRY_BUSY) != 0 || 1442 (ccb->ccb_h.retry_count--) > 0) { 1443 error = ERESTART; 1444 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1445 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1446 *timeout = 1000; 1447 } else { 1448 error = EIO; 1449 } 1450 break; 1451 case SCSI_STATUS_RESERV_CONFLICT: 1452 default: 1453 error = EIO; 1454 break; 1455 } 1456 return (error); 1457 } 1458 1459 static int 1460 camperiphscsisenseerror(union ccb *ccb, union ccb **orig, 1461 cam_flags camflags, u_int32_t sense_flags, 1462 int *openings, u_int32_t *relsim_flags, 1463 u_int32_t *timeout, u_int32_t *action, const char **action_string) 1464 { 1465 struct cam_periph *periph; 1466 union ccb *orig_ccb = ccb; 1467 int error, recoveryccb; 1468 1469 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 1470 if (ccb->ccb_h.func_code == XPT_SCSI_IO && ccb->csio.bio != NULL) 1471 biotrack(ccb->csio.bio, __func__); 1472 #endif 1473 1474 periph = xpt_path_periph(ccb->ccb_h.path); 1475 recoveryccb = (ccb->ccb_h.cbfcnp == camperiphdone); 1476 if ((periph->flags & CAM_PERIPH_RECOVERY_INPROG) && !recoveryccb) { 1477 /* 1478 * If error recovery is already in progress, don't attempt 1479 * to process this error, but requeue it unconditionally 1480 * and attempt to process it once error recovery has 1481 * completed. This failed command is probably related to 1482 * the error that caused the currently active error recovery 1483 * action so our current recovery efforts should also 1484 * address this command. Be aware that the error recovery 1485 * code assumes that only one recovery action is in progress 1486 * on a particular peripheral instance at any given time 1487 * (e.g. only one saved CCB for error recovery) so it is 1488 * imperitive that we don't violate this assumption. 1489 */ 1490 error = ERESTART; 1491 *action &= ~SSQ_PRINT_SENSE; 1492 } else { 1493 scsi_sense_action err_action; 1494 struct ccb_getdev cgd; 1495 1496 /* 1497 * Grab the inquiry data for this device. 1498 */ 1499 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, CAM_PRIORITY_NORMAL); 1500 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1501 xpt_action((union ccb *)&cgd); 1502 1503 err_action = scsi_error_action(&ccb->csio, &cgd.inq_data, 1504 sense_flags); 1505 error = err_action & SS_ERRMASK; 1506 1507 /* 1508 * Do not autostart sequential access devices 1509 * to avoid unexpected tape loading. 1510 */ 1511 if ((err_action & SS_MASK) == SS_START && 1512 SID_TYPE(&cgd.inq_data) == T_SEQUENTIAL) { 1513 *action_string = "Will not autostart a " 1514 "sequential access device"; 1515 goto sense_error_done; 1516 } 1517 1518 /* 1519 * Avoid recovery recursion if recovery action is the same. 1520 */ 1521 if ((err_action & SS_MASK) >= SS_START && recoveryccb) { 1522 if (((err_action & SS_MASK) == SS_START && 1523 ccb->csio.cdb_io.cdb_bytes[0] == START_STOP_UNIT) || 1524 ((err_action & SS_MASK) == SS_TUR && 1525 (ccb->csio.cdb_io.cdb_bytes[0] == TEST_UNIT_READY))) { 1526 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1527 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1528 *timeout = 500; 1529 } 1530 } 1531 1532 /* 1533 * If the recovery action will consume a retry, 1534 * make sure we actually have retries available. 1535 */ 1536 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1537 if (ccb->ccb_h.retry_count > 0 && 1538 (periph->flags & CAM_PERIPH_INVALID) == 0) 1539 ccb->ccb_h.retry_count--; 1540 else { 1541 *action_string = "Retries exhausted"; 1542 goto sense_error_done; 1543 } 1544 } 1545 1546 if ((err_action & SS_MASK) >= SS_START) { 1547 /* 1548 * Do common portions of commands that 1549 * use recovery CCBs. 1550 */ 1551 orig_ccb = xpt_alloc_ccb_nowait(); 1552 if (orig_ccb == NULL) { 1553 *action_string = "Can't allocate recovery CCB"; 1554 goto sense_error_done; 1555 } 1556 /* 1557 * Clear freeze flag for original request here, as 1558 * this freeze will be dropped as part of ERESTART. 1559 */ 1560 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1561 bcopy(ccb, orig_ccb, sizeof(*orig_ccb)); 1562 } 1563 1564 switch (err_action & SS_MASK) { 1565 case SS_NOP: 1566 *action_string = "No recovery action needed"; 1567 error = 0; 1568 break; 1569 case SS_RETRY: 1570 *action_string = "Retrying command (per sense data)"; 1571 error = ERESTART; 1572 break; 1573 case SS_FAIL: 1574 *action_string = "Unretryable error"; 1575 break; 1576 case SS_START: 1577 { 1578 int le; 1579 1580 /* 1581 * Send a start unit command to the device, and 1582 * then retry the command. 1583 */ 1584 *action_string = "Attempting to start unit"; 1585 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1586 1587 /* 1588 * Check for removable media and set 1589 * load/eject flag appropriately. 1590 */ 1591 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1592 le = TRUE; 1593 else 1594 le = FALSE; 1595 1596 scsi_start_stop(&ccb->csio, 1597 /*retries*/1, 1598 camperiphdone, 1599 MSG_SIMPLE_Q_TAG, 1600 /*start*/TRUE, 1601 /*load/eject*/le, 1602 /*immediate*/FALSE, 1603 SSD_FULL_SIZE, 1604 /*timeout*/50000); 1605 break; 1606 } 1607 case SS_TUR: 1608 { 1609 /* 1610 * Send a Test Unit Ready to the device. 1611 * If the 'many' flag is set, we send 120 1612 * test unit ready commands, one every half 1613 * second. Otherwise, we just send one TUR. 1614 * We only want to do this if the retry 1615 * count has not been exhausted. 1616 */ 1617 int retries; 1618 1619 if ((err_action & SSQ_MANY) != 0) { 1620 *action_string = "Polling device for readiness"; 1621 retries = 120; 1622 } else { 1623 *action_string = "Testing device for readiness"; 1624 retries = 1; 1625 } 1626 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1627 scsi_test_unit_ready(&ccb->csio, 1628 retries, 1629 camperiphdone, 1630 MSG_SIMPLE_Q_TAG, 1631 SSD_FULL_SIZE, 1632 /*timeout*/5000); 1633 1634 /* 1635 * Accomplish our 500ms delay by deferring 1636 * the release of our device queue appropriately. 1637 */ 1638 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1639 *timeout = 500; 1640 break; 1641 } 1642 default: 1643 panic("Unhandled error action %x", err_action); 1644 } 1645 1646 if ((err_action & SS_MASK) >= SS_START) { 1647 /* 1648 * Drop the priority, so that the recovery 1649 * CCB is the first to execute. Freeze the queue 1650 * after this command is sent so that we can 1651 * restore the old csio and have it queued in 1652 * the proper order before we release normal 1653 * transactions to the device. 1654 */ 1655 ccb->ccb_h.pinfo.priority--; 1656 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1657 ccb->ccb_h.saved_ccb_ptr = orig_ccb; 1658 error = ERESTART; 1659 *orig = orig_ccb; 1660 } 1661 1662 sense_error_done: 1663 *action = err_action; 1664 } 1665 return (error); 1666 } 1667 1668 /* 1669 * Generic error handler. Peripheral drivers usually filter 1670 * out the errors that they handle in a unique manner, then 1671 * call this function. 1672 */ 1673 int 1674 cam_periph_error(union ccb *ccb, cam_flags camflags, 1675 u_int32_t sense_flags, union ccb *save_ccb) 1676 { 1677 struct cam_path *newpath; 1678 union ccb *orig_ccb, *scan_ccb; 1679 struct cam_periph *periph; 1680 const char *action_string; 1681 cam_status status; 1682 int frozen, error, openings, devctl_err; 1683 u_int32_t action, relsim_flags, timeout; 1684 1685 action = SSQ_PRINT_SENSE; 1686 periph = xpt_path_periph(ccb->ccb_h.path); 1687 action_string = NULL; 1688 status = ccb->ccb_h.status; 1689 frozen = (status & CAM_DEV_QFRZN) != 0; 1690 status &= CAM_STATUS_MASK; 1691 devctl_err = openings = relsim_flags = timeout = 0; 1692 orig_ccb = ccb; 1693 1694 /* Filter the errors that should be reported via devctl */ 1695 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1696 case CAM_CMD_TIMEOUT: 1697 case CAM_REQ_ABORTED: 1698 case CAM_REQ_CMP_ERR: 1699 case CAM_REQ_TERMIO: 1700 case CAM_UNREC_HBA_ERROR: 1701 case CAM_DATA_RUN_ERR: 1702 case CAM_SCSI_STATUS_ERROR: 1703 case CAM_ATA_STATUS_ERROR: 1704 case CAM_SMP_STATUS_ERROR: 1705 devctl_err++; 1706 break; 1707 default: 1708 break; 1709 } 1710 1711 switch (status) { 1712 case CAM_REQ_CMP: 1713 error = 0; 1714 action &= ~SSQ_PRINT_SENSE; 1715 break; 1716 case CAM_SCSI_STATUS_ERROR: 1717 error = camperiphscsistatuserror(ccb, &orig_ccb, 1718 camflags, sense_flags, &openings, &relsim_flags, 1719 &timeout, &action, &action_string); 1720 break; 1721 case CAM_AUTOSENSE_FAIL: 1722 error = EIO; /* we have to kill the command */ 1723 break; 1724 case CAM_UA_ABORT: 1725 case CAM_UA_TERMIO: 1726 case CAM_MSG_REJECT_REC: 1727 /* XXX Don't know that these are correct */ 1728 error = EIO; 1729 break; 1730 case CAM_SEL_TIMEOUT: 1731 if ((camflags & CAM_RETRY_SELTO) != 0) { 1732 if (ccb->ccb_h.retry_count > 0 && 1733 (periph->flags & CAM_PERIPH_INVALID) == 0) { 1734 ccb->ccb_h.retry_count--; 1735 error = ERESTART; 1736 1737 /* 1738 * Wait a bit to give the device 1739 * time to recover before we try again. 1740 */ 1741 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1742 timeout = periph_selto_delay; 1743 break; 1744 } 1745 action_string = "Retries exhausted"; 1746 } 1747 /* FALLTHROUGH */ 1748 case CAM_DEV_NOT_THERE: 1749 error = ENXIO; 1750 action = SSQ_LOST; 1751 break; 1752 case CAM_REQ_INVALID: 1753 case CAM_PATH_INVALID: 1754 case CAM_NO_HBA: 1755 case CAM_PROVIDE_FAIL: 1756 case CAM_REQ_TOO_BIG: 1757 case CAM_LUN_INVALID: 1758 case CAM_TID_INVALID: 1759 case CAM_FUNC_NOTAVAIL: 1760 error = EINVAL; 1761 break; 1762 case CAM_SCSI_BUS_RESET: 1763 case CAM_BDR_SENT: 1764 /* 1765 * Commands that repeatedly timeout and cause these 1766 * kinds of error recovery actions, should return 1767 * CAM_CMD_TIMEOUT, which allows us to safely assume 1768 * that this command was an innocent bystander to 1769 * these events and should be unconditionally 1770 * retried. 1771 */ 1772 case CAM_REQUEUE_REQ: 1773 /* Unconditional requeue if device is still there */ 1774 if (periph->flags & CAM_PERIPH_INVALID) { 1775 action_string = "Periph was invalidated"; 1776 error = EIO; 1777 } else if (sense_flags & SF_NO_RETRY) { 1778 error = EIO; 1779 action_string = "Retry was blocked"; 1780 } else { 1781 error = ERESTART; 1782 action &= ~SSQ_PRINT_SENSE; 1783 } 1784 break; 1785 case CAM_RESRC_UNAVAIL: 1786 /* Wait a bit for the resource shortage to abate. */ 1787 timeout = periph_noresrc_delay; 1788 /* FALLTHROUGH */ 1789 case CAM_BUSY: 1790 if (timeout == 0) { 1791 /* Wait a bit for the busy condition to abate. */ 1792 timeout = periph_busy_delay; 1793 } 1794 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1795 /* FALLTHROUGH */ 1796 case CAM_ATA_STATUS_ERROR: 1797 case CAM_REQ_CMP_ERR: 1798 case CAM_CMD_TIMEOUT: 1799 case CAM_UNEXP_BUSFREE: 1800 case CAM_UNCOR_PARITY: 1801 case CAM_DATA_RUN_ERR: 1802 default: 1803 if (periph->flags & CAM_PERIPH_INVALID) { 1804 error = EIO; 1805 action_string = "Periph was invalidated"; 1806 } else if (ccb->ccb_h.retry_count == 0) { 1807 error = EIO; 1808 action_string = "Retries exhausted"; 1809 } else if (sense_flags & SF_NO_RETRY) { 1810 error = EIO; 1811 action_string = "Retry was blocked"; 1812 } else { 1813 ccb->ccb_h.retry_count--; 1814 error = ERESTART; 1815 } 1816 break; 1817 } 1818 1819 if ((sense_flags & SF_PRINT_ALWAYS) || 1820 CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO)) 1821 action |= SSQ_PRINT_SENSE; 1822 else if (sense_flags & SF_NO_PRINT) 1823 action &= ~SSQ_PRINT_SENSE; 1824 if ((action & SSQ_PRINT_SENSE) != 0) 1825 cam_error_print(orig_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1826 if (error != 0 && (action & SSQ_PRINT_SENSE) != 0) { 1827 if (error != ERESTART) { 1828 if (action_string == NULL) 1829 action_string = "Unretryable error"; 1830 xpt_print(ccb->ccb_h.path, "Error %d, %s\n", 1831 error, action_string); 1832 } else if (action_string != NULL) 1833 xpt_print(ccb->ccb_h.path, "%s\n", action_string); 1834 else 1835 xpt_print(ccb->ccb_h.path, "Retrying command\n"); 1836 } 1837 1838 if (devctl_err && (error != 0 || (action & SSQ_PRINT_SENSE) != 0)) 1839 cam_periph_devctl_notify(orig_ccb); 1840 1841 if ((action & SSQ_LOST) != 0) { 1842 lun_id_t lun_id; 1843 1844 /* 1845 * For a selection timeout, we consider all of the LUNs on 1846 * the target to be gone. If the status is CAM_DEV_NOT_THERE, 1847 * then we only get rid of the device(s) specified by the 1848 * path in the original CCB. 1849 */ 1850 if (status == CAM_SEL_TIMEOUT) 1851 lun_id = CAM_LUN_WILDCARD; 1852 else 1853 lun_id = xpt_path_lun_id(ccb->ccb_h.path); 1854 1855 /* Should we do more if we can't create the path?? */ 1856 if (xpt_create_path(&newpath, periph, 1857 xpt_path_path_id(ccb->ccb_h.path), 1858 xpt_path_target_id(ccb->ccb_h.path), 1859 lun_id) == CAM_REQ_CMP) { 1860 1861 /* 1862 * Let peripheral drivers know that this 1863 * device has gone away. 1864 */ 1865 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1866 xpt_free_path(newpath); 1867 } 1868 } 1869 1870 /* Broadcast UNIT ATTENTIONs to all periphs. */ 1871 if ((action & SSQ_UA) != 0) 1872 xpt_async(AC_UNIT_ATTENTION, orig_ccb->ccb_h.path, orig_ccb); 1873 1874 /* Rescan target on "Reported LUNs data has changed" */ 1875 if ((action & SSQ_RESCAN) != 0) { 1876 if (xpt_create_path(&newpath, NULL, 1877 xpt_path_path_id(ccb->ccb_h.path), 1878 xpt_path_target_id(ccb->ccb_h.path), 1879 CAM_LUN_WILDCARD) == CAM_REQ_CMP) { 1880 1881 scan_ccb = xpt_alloc_ccb_nowait(); 1882 if (scan_ccb != NULL) { 1883 scan_ccb->ccb_h.path = newpath; 1884 scan_ccb->ccb_h.func_code = XPT_SCAN_TGT; 1885 scan_ccb->crcn.flags = 0; 1886 xpt_rescan(scan_ccb); 1887 } else { 1888 xpt_print(newpath, 1889 "Can't allocate CCB to rescan target\n"); 1890 xpt_free_path(newpath); 1891 } 1892 } 1893 } 1894 1895 /* Attempt a retry */ 1896 if (error == ERESTART || error == 0) { 1897 if (frozen != 0) 1898 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1899 if (error == ERESTART) 1900 xpt_action(ccb); 1901 if (frozen != 0) 1902 cam_release_devq(ccb->ccb_h.path, 1903 relsim_flags, 1904 openings, 1905 timeout, 1906 /*getcount_only*/0); 1907 } 1908 1909 return (error); 1910 } 1911 1912 #define CAM_PERIPH_DEVD_MSG_SIZE 256 1913 1914 static void 1915 cam_periph_devctl_notify(union ccb *ccb) 1916 { 1917 struct cam_periph *periph; 1918 struct ccb_getdev *cgd; 1919 struct sbuf sb; 1920 int serr, sk, asc, ascq; 1921 char *sbmsg, *type; 1922 1923 sbmsg = malloc(CAM_PERIPH_DEVD_MSG_SIZE, M_CAMPERIPH, M_NOWAIT); 1924 if (sbmsg == NULL) 1925 return; 1926 1927 sbuf_new(&sb, sbmsg, CAM_PERIPH_DEVD_MSG_SIZE, SBUF_FIXEDLEN); 1928 1929 periph = xpt_path_periph(ccb->ccb_h.path); 1930 sbuf_printf(&sb, "device=%s%d ", periph->periph_name, 1931 periph->unit_number); 1932 1933 sbuf_printf(&sb, "serial=\""); 1934 if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) != NULL) { 1935 xpt_setup_ccb(&cgd->ccb_h, ccb->ccb_h.path, 1936 CAM_PRIORITY_NORMAL); 1937 cgd->ccb_h.func_code = XPT_GDEV_TYPE; 1938 xpt_action((union ccb *)cgd); 1939 1940 if (cgd->ccb_h.status == CAM_REQ_CMP) 1941 sbuf_bcat(&sb, cgd->serial_num, cgd->serial_num_len); 1942 xpt_free_ccb((union ccb *)cgd); 1943 } 1944 sbuf_printf(&sb, "\" "); 1945 sbuf_printf(&sb, "cam_status=\"0x%x\" ", ccb->ccb_h.status); 1946 1947 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1948 case CAM_CMD_TIMEOUT: 1949 sbuf_printf(&sb, "timeout=%d ", ccb->ccb_h.timeout); 1950 type = "timeout"; 1951 break; 1952 case CAM_SCSI_STATUS_ERROR: 1953 sbuf_printf(&sb, "scsi_status=%d ", ccb->csio.scsi_status); 1954 if (scsi_extract_sense_ccb(ccb, &serr, &sk, &asc, &ascq)) 1955 sbuf_printf(&sb, "scsi_sense=\"%02x %02x %02x %02x\" ", 1956 serr, sk, asc, ascq); 1957 type = "error"; 1958 break; 1959 case CAM_ATA_STATUS_ERROR: 1960 sbuf_printf(&sb, "RES=\""); 1961 ata_res_sbuf(&ccb->ataio.res, &sb); 1962 sbuf_printf(&sb, "\" "); 1963 type = "error"; 1964 break; 1965 default: 1966 type = "error"; 1967 break; 1968 } 1969 1970 if (ccb->ccb_h.func_code == XPT_SCSI_IO) { 1971 sbuf_printf(&sb, "CDB=\""); 1972 scsi_cdb_sbuf(scsiio_cdb_ptr(&ccb->csio), &sb); 1973 sbuf_printf(&sb, "\" "); 1974 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) { 1975 sbuf_printf(&sb, "ACB=\""); 1976 ata_cmd_sbuf(&ccb->ataio.cmd, &sb); 1977 sbuf_printf(&sb, "\" "); 1978 } 1979 1980 if (sbuf_finish(&sb) == 0) 1981 devctl_notify("CAM", "periph", type, sbuf_data(&sb)); 1982 sbuf_delete(&sb); 1983 free(sbmsg, M_CAMPERIPH); 1984 } 1985 1986