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; 646 647 sbuf_new(&sb, NULL, 160, SBUF_FIXEDLEN); 648 xpt_denounce_periph_sbuf(periph, &sb); 649 sbuf_finish(&sb); 650 sbuf_putbuf(&sb); 651 } 652 periph->flags |= CAM_PERIPH_INVALID; 653 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 654 if (periph->periph_oninval != NULL) 655 periph->periph_oninval(periph); 656 cam_periph_release_locked(periph); 657 } 658 659 static void 660 camperiphfree(struct cam_periph *periph) 661 { 662 struct periph_driver **p_drv; 663 664 cam_periph_assert(periph, MA_OWNED); 665 KASSERT(periph->periph_allocating == 0, ("%s%d: freed while allocating", 666 periph->periph_name, periph->unit_number)); 667 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 668 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 669 break; 670 } 671 if (*p_drv == NULL) { 672 printf("camperiphfree: attempt to free non-existant periph\n"); 673 return; 674 } 675 676 /* 677 * We need to set this flag before dropping the topology lock, to 678 * let anyone who is traversing the list that this peripheral is 679 * about to be freed, and there will be no more reference count 680 * checks. 681 */ 682 periph->flags |= CAM_PERIPH_FREE; 683 684 /* 685 * The peripheral destructor semantics dictate calling with only the 686 * SIM mutex held. Since it might sleep, it should not be called 687 * with the topology lock held. 688 */ 689 xpt_unlock_buses(); 690 691 /* 692 * We need to call the peripheral destructor prior to removing the 693 * peripheral from the list. Otherwise, we risk running into a 694 * scenario where the peripheral unit number may get reused 695 * (because it has been removed from the list), but some resources 696 * used by the peripheral are still hanging around. In particular, 697 * the devfs nodes used by some peripherals like the pass(4) driver 698 * aren't fully cleaned up until the destructor is run. If the 699 * unit number is reused before the devfs instance is fully gone, 700 * devfs will panic. 701 */ 702 if (periph->periph_dtor != NULL) 703 periph->periph_dtor(periph); 704 705 /* 706 * The peripheral list is protected by the topology lock. 707 */ 708 xpt_lock_buses(); 709 710 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 711 (*p_drv)->generation++; 712 713 xpt_remove_periph(periph); 714 715 xpt_unlock_buses(); 716 if ((periph->flags & CAM_PERIPH_ANNOUNCED) && !rebooting) 717 xpt_print(periph->path, "Periph destroyed\n"); 718 else 719 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n")); 720 721 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 722 union ccb ccb; 723 void *arg; 724 725 switch (periph->deferred_ac) { 726 case AC_FOUND_DEVICE: 727 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 728 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 729 xpt_action(&ccb); 730 arg = &ccb; 731 break; 732 case AC_PATH_REGISTERED: 733 ccb.ccb_h.func_code = XPT_PATH_INQ; 734 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 735 xpt_action(&ccb); 736 arg = &ccb; 737 break; 738 default: 739 arg = NULL; 740 break; 741 } 742 periph->deferred_callback(NULL, periph->deferred_ac, 743 periph->path, arg); 744 } 745 xpt_free_path(periph->path); 746 free(periph, M_CAMPERIPH); 747 xpt_lock_buses(); 748 } 749 750 /* 751 * Map user virtual pointers into kernel virtual address space, so we can 752 * access the memory. This is now a generic function that centralizes most 753 * of the sanity checks on the data flags, if any. 754 * This also only works for up to MAXPHYS memory. Since we use 755 * buffers to map stuff in and out, we're limited to the buffer size. 756 */ 757 int 758 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo, 759 u_int maxmap) 760 { 761 int numbufs, i, j; 762 int flags[CAM_PERIPH_MAXMAPS]; 763 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 764 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 765 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 766 767 if (maxmap == 0) 768 maxmap = DFLTPHYS; /* traditional default */ 769 else if (maxmap > MAXPHYS) 770 maxmap = MAXPHYS; /* for safety */ 771 switch(ccb->ccb_h.func_code) { 772 case XPT_DEV_MATCH: 773 if (ccb->cdm.match_buf_len == 0) { 774 printf("cam_periph_mapmem: invalid match buffer " 775 "length 0\n"); 776 return(EINVAL); 777 } 778 if (ccb->cdm.pattern_buf_len > 0) { 779 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 780 lengths[0] = ccb->cdm.pattern_buf_len; 781 dirs[0] = CAM_DIR_OUT; 782 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 783 lengths[1] = ccb->cdm.match_buf_len; 784 dirs[1] = CAM_DIR_IN; 785 numbufs = 2; 786 } else { 787 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 788 lengths[0] = ccb->cdm.match_buf_len; 789 dirs[0] = CAM_DIR_IN; 790 numbufs = 1; 791 } 792 /* 793 * This request will not go to the hardware, no reason 794 * to be so strict. vmapbuf() is able to map up to MAXPHYS. 795 */ 796 maxmap = MAXPHYS; 797 break; 798 case XPT_SCSI_IO: 799 case XPT_CONT_TARGET_IO: 800 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 801 return(0); 802 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR) 803 return (EINVAL); 804 data_ptrs[0] = &ccb->csio.data_ptr; 805 lengths[0] = ccb->csio.dxfer_len; 806 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 807 numbufs = 1; 808 break; 809 case XPT_ATA_IO: 810 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 811 return(0); 812 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR) 813 return (EINVAL); 814 data_ptrs[0] = &ccb->ataio.data_ptr; 815 lengths[0] = ccb->ataio.dxfer_len; 816 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 817 numbufs = 1; 818 break; 819 case XPT_SMP_IO: 820 data_ptrs[0] = &ccb->smpio.smp_request; 821 lengths[0] = ccb->smpio.smp_request_len; 822 dirs[0] = CAM_DIR_OUT; 823 data_ptrs[1] = &ccb->smpio.smp_response; 824 lengths[1] = ccb->smpio.smp_response_len; 825 dirs[1] = CAM_DIR_IN; 826 numbufs = 2; 827 break; 828 case XPT_DEV_ADVINFO: 829 if (ccb->cdai.bufsiz == 0) 830 return (0); 831 832 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf; 833 lengths[0] = ccb->cdai.bufsiz; 834 dirs[0] = CAM_DIR_IN; 835 numbufs = 1; 836 837 /* 838 * This request will not go to the hardware, no reason 839 * to be so strict. vmapbuf() is able to map up to MAXPHYS. 840 */ 841 maxmap = MAXPHYS; 842 break; 843 default: 844 return(EINVAL); 845 break; /* NOTREACHED */ 846 } 847 848 /* 849 * Check the transfer length and permissions first, so we don't 850 * have to unmap any previously mapped buffers. 851 */ 852 for (i = 0; i < numbufs; i++) { 853 854 flags[i] = 0; 855 856 /* 857 * The userland data pointer passed in may not be page 858 * aligned. vmapbuf() truncates the address to a page 859 * boundary, so if the address isn't page aligned, we'll 860 * need enough space for the given transfer length, plus 861 * whatever extra space is necessary to make it to the page 862 * boundary. 863 */ 864 if ((lengths[i] + 865 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > maxmap){ 866 printf("cam_periph_mapmem: attempt to map %lu bytes, " 867 "which is greater than %lu\n", 868 (long)(lengths[i] + 869 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 870 (u_long)maxmap); 871 return(E2BIG); 872 } 873 874 if (dirs[i] & CAM_DIR_OUT) { 875 flags[i] = BIO_WRITE; 876 } 877 878 if (dirs[i] & CAM_DIR_IN) { 879 flags[i] = BIO_READ; 880 } 881 882 } 883 884 /* 885 * This keeps the kernel stack of current thread from getting 886 * swapped. In low-memory situations where the kernel stack might 887 * otherwise get swapped out, this holds it and allows the thread 888 * to make progress and release the kernel mapped pages sooner. 889 * 890 * XXX KDM should I use P_NOSWAP instead? 891 */ 892 PHOLD(curproc); 893 894 for (i = 0; i < numbufs; i++) { 895 /* 896 * Get the buffer. 897 */ 898 mapinfo->bp[i] = getpbuf(NULL); 899 900 /* put our pointer in the data slot */ 901 mapinfo->bp[i]->b_data = *data_ptrs[i]; 902 903 /* save the user's data address */ 904 mapinfo->bp[i]->b_caller1 = *data_ptrs[i]; 905 906 /* set the transfer length, we know it's < MAXPHYS */ 907 mapinfo->bp[i]->b_bufsize = lengths[i]; 908 909 /* set the direction */ 910 mapinfo->bp[i]->b_iocmd = flags[i]; 911 912 /* 913 * Map the buffer into kernel memory. 914 * 915 * Note that useracc() alone is not a sufficient test. 916 * vmapbuf() can still fail due to a smaller file mapped 917 * into a larger area of VM, or if userland races against 918 * vmapbuf() after the useracc() check. 919 */ 920 if (vmapbuf(mapinfo->bp[i], 1) < 0) { 921 for (j = 0; j < i; ++j) { 922 *data_ptrs[j] = mapinfo->bp[j]->b_caller1; 923 vunmapbuf(mapinfo->bp[j]); 924 relpbuf(mapinfo->bp[j], NULL); 925 } 926 relpbuf(mapinfo->bp[i], NULL); 927 PRELE(curproc); 928 return(EACCES); 929 } 930 931 /* set our pointer to the new mapped area */ 932 *data_ptrs[i] = mapinfo->bp[i]->b_data; 933 934 mapinfo->num_bufs_used++; 935 } 936 937 /* 938 * Now that we've gotten this far, change ownership to the kernel 939 * of the buffers so that we don't run afoul of returning to user 940 * space with locks (on the buffer) held. 941 */ 942 for (i = 0; i < numbufs; i++) { 943 BUF_KERNPROC(mapinfo->bp[i]); 944 } 945 946 947 return(0); 948 } 949 950 /* 951 * Unmap memory segments mapped into kernel virtual address space by 952 * cam_periph_mapmem(). 953 */ 954 void 955 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 956 { 957 int numbufs, i; 958 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 959 960 if (mapinfo->num_bufs_used <= 0) { 961 /* nothing to free and the process wasn't held. */ 962 return; 963 } 964 965 switch (ccb->ccb_h.func_code) { 966 case XPT_DEV_MATCH: 967 numbufs = min(mapinfo->num_bufs_used, 2); 968 969 if (numbufs == 1) { 970 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 971 } else { 972 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 973 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 974 } 975 break; 976 case XPT_SCSI_IO: 977 case XPT_CONT_TARGET_IO: 978 data_ptrs[0] = &ccb->csio.data_ptr; 979 numbufs = min(mapinfo->num_bufs_used, 1); 980 break; 981 case XPT_ATA_IO: 982 data_ptrs[0] = &ccb->ataio.data_ptr; 983 numbufs = min(mapinfo->num_bufs_used, 1); 984 break; 985 case XPT_SMP_IO: 986 numbufs = min(mapinfo->num_bufs_used, 2); 987 data_ptrs[0] = &ccb->smpio.smp_request; 988 data_ptrs[1] = &ccb->smpio.smp_response; 989 break; 990 case XPT_DEV_ADVINFO: 991 numbufs = min(mapinfo->num_bufs_used, 1); 992 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf; 993 break; 994 default: 995 /* allow ourselves to be swapped once again */ 996 PRELE(curproc); 997 return; 998 break; /* NOTREACHED */ 999 } 1000 1001 for (i = 0; i < numbufs; i++) { 1002 /* Set the user's pointer back to the original value */ 1003 *data_ptrs[i] = mapinfo->bp[i]->b_caller1; 1004 1005 /* unmap the buffer */ 1006 vunmapbuf(mapinfo->bp[i]); 1007 1008 /* release the buffer */ 1009 relpbuf(mapinfo->bp[i], NULL); 1010 } 1011 1012 /* allow ourselves to be swapped once again */ 1013 PRELE(curproc); 1014 } 1015 1016 int 1017 cam_periph_ioctl(struct cam_periph *periph, u_long cmd, caddr_t addr, 1018 int (*error_routine)(union ccb *ccb, 1019 cam_flags camflags, 1020 u_int32_t sense_flags)) 1021 { 1022 union ccb *ccb; 1023 int error; 1024 int found; 1025 1026 error = found = 0; 1027 1028 switch(cmd){ 1029 case CAMGETPASSTHRU: 1030 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 1031 xpt_setup_ccb(&ccb->ccb_h, 1032 ccb->ccb_h.path, 1033 CAM_PRIORITY_NORMAL); 1034 ccb->ccb_h.func_code = XPT_GDEVLIST; 1035 1036 /* 1037 * Basically, the point of this is that we go through 1038 * getting the list of devices, until we find a passthrough 1039 * device. In the current version of the CAM code, the 1040 * only way to determine what type of device we're dealing 1041 * with is by its name. 1042 */ 1043 while (found == 0) { 1044 ccb->cgdl.index = 0; 1045 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 1046 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 1047 1048 /* we want the next device in the list */ 1049 xpt_action(ccb); 1050 if (strncmp(ccb->cgdl.periph_name, 1051 "pass", 4) == 0){ 1052 found = 1; 1053 break; 1054 } 1055 } 1056 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 1057 (found == 0)) { 1058 ccb->cgdl.periph_name[0] = '\0'; 1059 ccb->cgdl.unit_number = 0; 1060 break; 1061 } 1062 } 1063 1064 /* copy the result back out */ 1065 bcopy(ccb, addr, sizeof(union ccb)); 1066 1067 /* and release the ccb */ 1068 xpt_release_ccb(ccb); 1069 1070 break; 1071 default: 1072 error = ENOTTY; 1073 break; 1074 } 1075 return(error); 1076 } 1077 1078 static void 1079 cam_periph_done_panic(struct cam_periph *periph, union ccb *done_ccb) 1080 { 1081 1082 panic("%s: already done with ccb %p", __func__, done_ccb); 1083 } 1084 1085 static void 1086 cam_periph_done(struct cam_periph *periph, union ccb *done_ccb) 1087 { 1088 1089 /* Caller will release the CCB */ 1090 xpt_path_assert(done_ccb->ccb_h.path, MA_OWNED); 1091 done_ccb->ccb_h.cbfcnp = cam_periph_done_panic; 1092 wakeup(&done_ccb->ccb_h.cbfcnp); 1093 } 1094 1095 static void 1096 cam_periph_ccbwait(union ccb *ccb) 1097 { 1098 1099 if ((ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 1100 while (ccb->ccb_h.cbfcnp != cam_periph_done_panic) 1101 xpt_path_sleep(ccb->ccb_h.path, &ccb->ccb_h.cbfcnp, 1102 PRIBIO, "cbwait", 0); 1103 } 1104 KASSERT(ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX && 1105 (ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG, 1106 ("%s: proceeding with incomplete ccb: ccb=%p, func_code=%#x, " 1107 "status=%#x, index=%d", __func__, ccb, ccb->ccb_h.func_code, 1108 ccb->ccb_h.status, ccb->ccb_h.pinfo.index)); 1109 } 1110 1111 int 1112 cam_periph_runccb(union ccb *ccb, 1113 int (*error_routine)(union ccb *ccb, 1114 cam_flags camflags, 1115 u_int32_t sense_flags), 1116 cam_flags camflags, u_int32_t sense_flags, 1117 struct devstat *ds) 1118 { 1119 struct bintime *starttime; 1120 struct bintime ltime; 1121 int error; 1122 1123 starttime = NULL; 1124 xpt_path_assert(ccb->ccb_h.path, MA_OWNED); 1125 KASSERT((ccb->ccb_h.flags & CAM_UNLOCKED) == 0, 1126 ("%s: ccb=%p, func_code=%#x, flags=%#x", __func__, ccb, 1127 ccb->ccb_h.func_code, ccb->ccb_h.flags)); 1128 1129 /* 1130 * If the user has supplied a stats structure, and if we understand 1131 * this particular type of ccb, record the transaction start. 1132 */ 1133 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO || 1134 ccb->ccb_h.func_code == XPT_ATA_IO)) { 1135 starttime = <ime; 1136 binuptime(starttime); 1137 devstat_start_transaction(ds, starttime); 1138 } 1139 1140 ccb->ccb_h.cbfcnp = cam_periph_done; 1141 xpt_action(ccb); 1142 1143 do { 1144 cam_periph_ccbwait(ccb); 1145 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 1146 error = 0; 1147 else if (error_routine != NULL) { 1148 ccb->ccb_h.cbfcnp = cam_periph_done; 1149 error = (*error_routine)(ccb, camflags, sense_flags); 1150 } else 1151 error = 0; 1152 1153 } while (error == ERESTART); 1154 1155 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 1156 cam_release_devq(ccb->ccb_h.path, 1157 /* relsim_flags */0, 1158 /* openings */0, 1159 /* timeout */0, 1160 /* getcount_only */ FALSE); 1161 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1162 } 1163 1164 if (ds != NULL) { 1165 if (ccb->ccb_h.func_code == XPT_SCSI_IO) { 1166 devstat_end_transaction(ds, 1167 ccb->csio.dxfer_len - ccb->csio.resid, 1168 ccb->csio.tag_action & 0x3, 1169 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 1170 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 1171 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1172 DEVSTAT_WRITE : 1173 DEVSTAT_READ, NULL, starttime); 1174 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) { 1175 devstat_end_transaction(ds, 1176 ccb->ataio.dxfer_len - ccb->ataio.resid, 1177 0, /* Not used in ATA */ 1178 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 1179 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 1180 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1181 DEVSTAT_WRITE : 1182 DEVSTAT_READ, NULL, starttime); 1183 } 1184 } 1185 1186 return(error); 1187 } 1188 1189 void 1190 cam_freeze_devq(struct cam_path *path) 1191 { 1192 struct ccb_hdr ccb_h; 1193 1194 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_freeze_devq\n")); 1195 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 1196 ccb_h.func_code = XPT_NOOP; 1197 ccb_h.flags = CAM_DEV_QFREEZE; 1198 xpt_action((union ccb *)&ccb_h); 1199 } 1200 1201 u_int32_t 1202 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 1203 u_int32_t openings, u_int32_t arg, 1204 int getcount_only) 1205 { 1206 struct ccb_relsim crs; 1207 1208 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_release_devq(%u, %u, %u, %d)\n", 1209 relsim_flags, openings, arg, getcount_only)); 1210 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 1211 crs.ccb_h.func_code = XPT_REL_SIMQ; 1212 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 1213 crs.release_flags = relsim_flags; 1214 crs.openings = openings; 1215 crs.release_timeout = arg; 1216 xpt_action((union ccb *)&crs); 1217 return (crs.qfrozen_cnt); 1218 } 1219 1220 #define saved_ccb_ptr ppriv_ptr0 1221 static void 1222 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 1223 { 1224 union ccb *saved_ccb; 1225 cam_status status; 1226 struct scsi_start_stop_unit *scsi_cmd; 1227 int error_code, sense_key, asc, ascq; 1228 1229 scsi_cmd = (struct scsi_start_stop_unit *) 1230 &done_ccb->csio.cdb_io.cdb_bytes; 1231 status = done_ccb->ccb_h.status; 1232 1233 if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1234 if (scsi_extract_sense_ccb(done_ccb, 1235 &error_code, &sense_key, &asc, &ascq)) { 1236 /* 1237 * If the error is "invalid field in CDB", 1238 * and the load/eject flag is set, turn the 1239 * flag off and try again. This is just in 1240 * case the drive in question barfs on the 1241 * load eject flag. The CAM code should set 1242 * the load/eject flag by default for 1243 * removable media. 1244 */ 1245 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1246 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1247 (asc == 0x24) && (ascq == 0x00)) { 1248 scsi_cmd->how &= ~SSS_LOEJ; 1249 if (status & CAM_DEV_QFRZN) { 1250 cam_release_devq(done_ccb->ccb_h.path, 1251 0, 0, 0, 0); 1252 done_ccb->ccb_h.status &= 1253 ~CAM_DEV_QFRZN; 1254 } 1255 xpt_action(done_ccb); 1256 goto out; 1257 } 1258 } 1259 if (cam_periph_error(done_ccb, 1260 0, SF_RETRY_UA | SF_NO_PRINT, NULL) == ERESTART) 1261 goto out; 1262 if (done_ccb->ccb_h.status & CAM_DEV_QFRZN) { 1263 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1264 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1265 } 1266 } else { 1267 /* 1268 * If we have successfully taken a device from the not 1269 * ready to ready state, re-scan the device and re-get 1270 * the inquiry information. Many devices (mostly disks) 1271 * don't properly report their inquiry information unless 1272 * they are spun up. 1273 */ 1274 if (scsi_cmd->opcode == START_STOP_UNIT) 1275 xpt_async(AC_INQ_CHANGED, done_ccb->ccb_h.path, NULL); 1276 } 1277 1278 /* 1279 * Perform the final retry with the original CCB so that final 1280 * error processing is performed by the owner of the CCB. 1281 */ 1282 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 1283 bcopy(saved_ccb, done_ccb, sizeof(*done_ccb)); 1284 xpt_free_ccb(saved_ccb); 1285 if (done_ccb->ccb_h.cbfcnp != camperiphdone) 1286 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1287 xpt_action(done_ccb); 1288 1289 out: 1290 /* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */ 1291 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1292 } 1293 1294 /* 1295 * Generic Async Event handler. Peripheral drivers usually 1296 * filter out the events that require personal attention, 1297 * and leave the rest to this function. 1298 */ 1299 void 1300 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1301 struct cam_path *path, void *arg) 1302 { 1303 switch (code) { 1304 case AC_LOST_DEVICE: 1305 cam_periph_invalidate(periph); 1306 break; 1307 default: 1308 break; 1309 } 1310 } 1311 1312 void 1313 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1314 { 1315 struct ccb_getdevstats cgds; 1316 1317 xpt_setup_ccb(&cgds.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 1318 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1319 xpt_action((union ccb *)&cgds); 1320 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1321 } 1322 1323 void 1324 cam_periph_freeze_after_event(struct cam_periph *periph, 1325 struct timeval* event_time, u_int duration_ms) 1326 { 1327 struct timeval delta; 1328 struct timeval duration_tv; 1329 1330 if (!timevalisset(event_time)) 1331 return; 1332 1333 microtime(&delta); 1334 timevalsub(&delta, event_time); 1335 duration_tv.tv_sec = duration_ms / 1000; 1336 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1337 if (timevalcmp(&delta, &duration_tv, <)) { 1338 timevalsub(&duration_tv, &delta); 1339 1340 duration_ms = duration_tv.tv_sec * 1000; 1341 duration_ms += duration_tv.tv_usec / 1000; 1342 cam_freeze_devq(periph->path); 1343 cam_release_devq(periph->path, 1344 RELSIM_RELEASE_AFTER_TIMEOUT, 1345 /*reduction*/0, 1346 /*timeout*/duration_ms, 1347 /*getcount_only*/0); 1348 } 1349 1350 } 1351 1352 static int 1353 camperiphscsistatuserror(union ccb *ccb, union ccb **orig_ccb, 1354 cam_flags camflags, u_int32_t sense_flags, 1355 int *openings, u_int32_t *relsim_flags, 1356 u_int32_t *timeout, u_int32_t *action, const char **action_string) 1357 { 1358 int error; 1359 1360 switch (ccb->csio.scsi_status) { 1361 case SCSI_STATUS_OK: 1362 case SCSI_STATUS_COND_MET: 1363 case SCSI_STATUS_INTERMED: 1364 case SCSI_STATUS_INTERMED_COND_MET: 1365 error = 0; 1366 break; 1367 case SCSI_STATUS_CMD_TERMINATED: 1368 case SCSI_STATUS_CHECK_COND: 1369 error = camperiphscsisenseerror(ccb, orig_ccb, 1370 camflags, 1371 sense_flags, 1372 openings, 1373 relsim_flags, 1374 timeout, 1375 action, 1376 action_string); 1377 break; 1378 case SCSI_STATUS_QUEUE_FULL: 1379 { 1380 /* no decrement */ 1381 struct ccb_getdevstats cgds; 1382 1383 /* 1384 * First off, find out what the current 1385 * transaction counts are. 1386 */ 1387 xpt_setup_ccb(&cgds.ccb_h, 1388 ccb->ccb_h.path, 1389 CAM_PRIORITY_NORMAL); 1390 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1391 xpt_action((union ccb *)&cgds); 1392 1393 /* 1394 * If we were the only transaction active, treat 1395 * the QUEUE FULL as if it were a BUSY condition. 1396 */ 1397 if (cgds.dev_active != 0) { 1398 int total_openings; 1399 1400 /* 1401 * Reduce the number of openings to 1402 * be 1 less than the amount it took 1403 * to get a queue full bounded by the 1404 * minimum allowed tag count for this 1405 * device. 1406 */ 1407 total_openings = cgds.dev_active + cgds.dev_openings; 1408 *openings = cgds.dev_active; 1409 if (*openings < cgds.mintags) 1410 *openings = cgds.mintags; 1411 if (*openings < total_openings) 1412 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1413 else { 1414 /* 1415 * Some devices report queue full for 1416 * temporary resource shortages. For 1417 * this reason, we allow a minimum 1418 * tag count to be entered via a 1419 * quirk entry to prevent the queue 1420 * count on these devices from falling 1421 * to a pessimisticly low value. We 1422 * still wait for the next successful 1423 * completion, however, before queueing 1424 * more transactions to the device. 1425 */ 1426 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1427 } 1428 *timeout = 0; 1429 error = ERESTART; 1430 *action &= ~SSQ_PRINT_SENSE; 1431 break; 1432 } 1433 /* FALLTHROUGH */ 1434 } 1435 case SCSI_STATUS_BUSY: 1436 /* 1437 * Restart the queue after either another 1438 * command completes or a 1 second timeout. 1439 */ 1440 if ((sense_flags & SF_RETRY_BUSY) != 0 || 1441 (ccb->ccb_h.retry_count--) > 0) { 1442 error = ERESTART; 1443 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1444 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1445 *timeout = 1000; 1446 } else { 1447 error = EIO; 1448 } 1449 break; 1450 case SCSI_STATUS_RESERV_CONFLICT: 1451 default: 1452 error = EIO; 1453 break; 1454 } 1455 return (error); 1456 } 1457 1458 static int 1459 camperiphscsisenseerror(union ccb *ccb, union ccb **orig, 1460 cam_flags camflags, u_int32_t sense_flags, 1461 int *openings, u_int32_t *relsim_flags, 1462 u_int32_t *timeout, u_int32_t *action, const char **action_string) 1463 { 1464 struct cam_periph *periph; 1465 union ccb *orig_ccb = ccb; 1466 int error, recoveryccb; 1467 1468 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 1469 if (ccb->ccb_h.func_code == XPT_SCSI_IO && ccb->csio.bio != NULL) 1470 biotrack(ccb->csio.bio, __func__); 1471 #endif 1472 1473 periph = xpt_path_periph(ccb->ccb_h.path); 1474 recoveryccb = (ccb->ccb_h.cbfcnp == camperiphdone); 1475 if ((periph->flags & CAM_PERIPH_RECOVERY_INPROG) && !recoveryccb) { 1476 /* 1477 * If error recovery is already in progress, don't attempt 1478 * to process this error, but requeue it unconditionally 1479 * and attempt to process it once error recovery has 1480 * completed. This failed command is probably related to 1481 * the error that caused the currently active error recovery 1482 * action so our current recovery efforts should also 1483 * address this command. Be aware that the error recovery 1484 * code assumes that only one recovery action is in progress 1485 * on a particular peripheral instance at any given time 1486 * (e.g. only one saved CCB for error recovery) so it is 1487 * imperitive that we don't violate this assumption. 1488 */ 1489 error = ERESTART; 1490 *action &= ~SSQ_PRINT_SENSE; 1491 } else { 1492 scsi_sense_action err_action; 1493 struct ccb_getdev cgd; 1494 1495 /* 1496 * Grab the inquiry data for this device. 1497 */ 1498 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, CAM_PRIORITY_NORMAL); 1499 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1500 xpt_action((union ccb *)&cgd); 1501 1502 err_action = scsi_error_action(&ccb->csio, &cgd.inq_data, 1503 sense_flags); 1504 error = err_action & SS_ERRMASK; 1505 1506 /* 1507 * Do not autostart sequential access devices 1508 * to avoid unexpected tape loading. 1509 */ 1510 if ((err_action & SS_MASK) == SS_START && 1511 SID_TYPE(&cgd.inq_data) == T_SEQUENTIAL) { 1512 *action_string = "Will not autostart a " 1513 "sequential access device"; 1514 goto sense_error_done; 1515 } 1516 1517 /* 1518 * Avoid recovery recursion if recovery action is the same. 1519 */ 1520 if ((err_action & SS_MASK) >= SS_START && recoveryccb) { 1521 if (((err_action & SS_MASK) == SS_START && 1522 ccb->csio.cdb_io.cdb_bytes[0] == START_STOP_UNIT) || 1523 ((err_action & SS_MASK) == SS_TUR && 1524 (ccb->csio.cdb_io.cdb_bytes[0] == TEST_UNIT_READY))) { 1525 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1526 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1527 *timeout = 500; 1528 } 1529 } 1530 1531 /* 1532 * If the recovery action will consume a retry, 1533 * make sure we actually have retries available. 1534 */ 1535 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1536 if (ccb->ccb_h.retry_count > 0 && 1537 (periph->flags & CAM_PERIPH_INVALID) == 0) 1538 ccb->ccb_h.retry_count--; 1539 else { 1540 *action_string = "Retries exhausted"; 1541 goto sense_error_done; 1542 } 1543 } 1544 1545 if ((err_action & SS_MASK) >= SS_START) { 1546 /* 1547 * Do common portions of commands that 1548 * use recovery CCBs. 1549 */ 1550 orig_ccb = xpt_alloc_ccb_nowait(); 1551 if (orig_ccb == NULL) { 1552 *action_string = "Can't allocate recovery CCB"; 1553 goto sense_error_done; 1554 } 1555 /* 1556 * Clear freeze flag for original request here, as 1557 * this freeze will be dropped as part of ERESTART. 1558 */ 1559 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1560 bcopy(ccb, orig_ccb, sizeof(*orig_ccb)); 1561 } 1562 1563 switch (err_action & SS_MASK) { 1564 case SS_NOP: 1565 *action_string = "No recovery action needed"; 1566 error = 0; 1567 break; 1568 case SS_RETRY: 1569 *action_string = "Retrying command (per sense data)"; 1570 error = ERESTART; 1571 break; 1572 case SS_FAIL: 1573 *action_string = "Unretryable error"; 1574 break; 1575 case SS_START: 1576 { 1577 int le; 1578 1579 /* 1580 * Send a start unit command to the device, and 1581 * then retry the command. 1582 */ 1583 *action_string = "Attempting to start unit"; 1584 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1585 1586 /* 1587 * Check for removable media and set 1588 * load/eject flag appropriately. 1589 */ 1590 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1591 le = TRUE; 1592 else 1593 le = FALSE; 1594 1595 scsi_start_stop(&ccb->csio, 1596 /*retries*/1, 1597 camperiphdone, 1598 MSG_SIMPLE_Q_TAG, 1599 /*start*/TRUE, 1600 /*load/eject*/le, 1601 /*immediate*/FALSE, 1602 SSD_FULL_SIZE, 1603 /*timeout*/50000); 1604 break; 1605 } 1606 case SS_TUR: 1607 { 1608 /* 1609 * Send a Test Unit Ready to the device. 1610 * If the 'many' flag is set, we send 120 1611 * test unit ready commands, one every half 1612 * second. Otherwise, we just send one TUR. 1613 * We only want to do this if the retry 1614 * count has not been exhausted. 1615 */ 1616 int retries; 1617 1618 if ((err_action & SSQ_MANY) != 0) { 1619 *action_string = "Polling device for readiness"; 1620 retries = 120; 1621 } else { 1622 *action_string = "Testing device for readiness"; 1623 retries = 1; 1624 } 1625 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1626 scsi_test_unit_ready(&ccb->csio, 1627 retries, 1628 camperiphdone, 1629 MSG_SIMPLE_Q_TAG, 1630 SSD_FULL_SIZE, 1631 /*timeout*/5000); 1632 1633 /* 1634 * Accomplish our 500ms delay by deferring 1635 * the release of our device queue appropriately. 1636 */ 1637 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1638 *timeout = 500; 1639 break; 1640 } 1641 default: 1642 panic("Unhandled error action %x", err_action); 1643 } 1644 1645 if ((err_action & SS_MASK) >= SS_START) { 1646 /* 1647 * Drop the priority, so that the recovery 1648 * CCB is the first to execute. Freeze the queue 1649 * after this command is sent so that we can 1650 * restore the old csio and have it queued in 1651 * the proper order before we release normal 1652 * transactions to the device. 1653 */ 1654 ccb->ccb_h.pinfo.priority--; 1655 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1656 ccb->ccb_h.saved_ccb_ptr = orig_ccb; 1657 error = ERESTART; 1658 *orig = orig_ccb; 1659 } 1660 1661 sense_error_done: 1662 *action = err_action; 1663 } 1664 return (error); 1665 } 1666 1667 /* 1668 * Generic error handler. Peripheral drivers usually filter 1669 * out the errors that they handle in a unique manner, then 1670 * call this function. 1671 */ 1672 int 1673 cam_periph_error(union ccb *ccb, cam_flags camflags, 1674 u_int32_t sense_flags, union ccb *save_ccb) 1675 { 1676 struct cam_path *newpath; 1677 union ccb *orig_ccb, *scan_ccb; 1678 struct cam_periph *periph; 1679 const char *action_string; 1680 cam_status status; 1681 int frozen, error, openings, devctl_err; 1682 u_int32_t action, relsim_flags, timeout; 1683 1684 action = SSQ_PRINT_SENSE; 1685 periph = xpt_path_periph(ccb->ccb_h.path); 1686 action_string = NULL; 1687 status = ccb->ccb_h.status; 1688 frozen = (status & CAM_DEV_QFRZN) != 0; 1689 status &= CAM_STATUS_MASK; 1690 devctl_err = openings = relsim_flags = timeout = 0; 1691 orig_ccb = ccb; 1692 1693 /* Filter the errors that should be reported via devctl */ 1694 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1695 case CAM_CMD_TIMEOUT: 1696 case CAM_REQ_ABORTED: 1697 case CAM_REQ_CMP_ERR: 1698 case CAM_REQ_TERMIO: 1699 case CAM_UNREC_HBA_ERROR: 1700 case CAM_DATA_RUN_ERR: 1701 case CAM_SCSI_STATUS_ERROR: 1702 case CAM_ATA_STATUS_ERROR: 1703 case CAM_SMP_STATUS_ERROR: 1704 devctl_err++; 1705 break; 1706 default: 1707 break; 1708 } 1709 1710 switch (status) { 1711 case CAM_REQ_CMP: 1712 error = 0; 1713 action &= ~SSQ_PRINT_SENSE; 1714 break; 1715 case CAM_SCSI_STATUS_ERROR: 1716 error = camperiphscsistatuserror(ccb, &orig_ccb, 1717 camflags, sense_flags, &openings, &relsim_flags, 1718 &timeout, &action, &action_string); 1719 break; 1720 case CAM_AUTOSENSE_FAIL: 1721 error = EIO; /* we have to kill the command */ 1722 break; 1723 case CAM_UA_ABORT: 1724 case CAM_UA_TERMIO: 1725 case CAM_MSG_REJECT_REC: 1726 /* XXX Don't know that these are correct */ 1727 error = EIO; 1728 break; 1729 case CAM_SEL_TIMEOUT: 1730 if ((camflags & CAM_RETRY_SELTO) != 0) { 1731 if (ccb->ccb_h.retry_count > 0 && 1732 (periph->flags & CAM_PERIPH_INVALID) == 0) { 1733 ccb->ccb_h.retry_count--; 1734 error = ERESTART; 1735 1736 /* 1737 * Wait a bit to give the device 1738 * time to recover before we try again. 1739 */ 1740 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1741 timeout = periph_selto_delay; 1742 break; 1743 } 1744 action_string = "Retries exhausted"; 1745 } 1746 /* FALLTHROUGH */ 1747 case CAM_DEV_NOT_THERE: 1748 error = ENXIO; 1749 action = SSQ_LOST; 1750 break; 1751 case CAM_REQ_INVALID: 1752 case CAM_PATH_INVALID: 1753 case CAM_NO_HBA: 1754 case CAM_PROVIDE_FAIL: 1755 case CAM_REQ_TOO_BIG: 1756 case CAM_LUN_INVALID: 1757 case CAM_TID_INVALID: 1758 case CAM_FUNC_NOTAVAIL: 1759 error = EINVAL; 1760 break; 1761 case CAM_SCSI_BUS_RESET: 1762 case CAM_BDR_SENT: 1763 /* 1764 * Commands that repeatedly timeout and cause these 1765 * kinds of error recovery actions, should return 1766 * CAM_CMD_TIMEOUT, which allows us to safely assume 1767 * that this command was an innocent bystander to 1768 * these events and should be unconditionally 1769 * retried. 1770 */ 1771 case CAM_REQUEUE_REQ: 1772 /* Unconditional requeue if device is still there */ 1773 if (periph->flags & CAM_PERIPH_INVALID) { 1774 action_string = "Periph was invalidated"; 1775 error = EIO; 1776 } else if (sense_flags & SF_NO_RETRY) { 1777 error = EIO; 1778 action_string = "Retry was blocked"; 1779 } else { 1780 error = ERESTART; 1781 action &= ~SSQ_PRINT_SENSE; 1782 } 1783 break; 1784 case CAM_RESRC_UNAVAIL: 1785 /* Wait a bit for the resource shortage to abate. */ 1786 timeout = periph_noresrc_delay; 1787 /* FALLTHROUGH */ 1788 case CAM_BUSY: 1789 if (timeout == 0) { 1790 /* Wait a bit for the busy condition to abate. */ 1791 timeout = periph_busy_delay; 1792 } 1793 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1794 /* FALLTHROUGH */ 1795 case CAM_ATA_STATUS_ERROR: 1796 case CAM_REQ_CMP_ERR: 1797 case CAM_CMD_TIMEOUT: 1798 case CAM_UNEXP_BUSFREE: 1799 case CAM_UNCOR_PARITY: 1800 case CAM_DATA_RUN_ERR: 1801 default: 1802 if (periph->flags & CAM_PERIPH_INVALID) { 1803 error = EIO; 1804 action_string = "Periph was invalidated"; 1805 } else if (ccb->ccb_h.retry_count == 0) { 1806 error = EIO; 1807 action_string = "Retries exhausted"; 1808 } else if (sense_flags & SF_NO_RETRY) { 1809 error = EIO; 1810 action_string = "Retry was blocked"; 1811 } else { 1812 ccb->ccb_h.retry_count--; 1813 error = ERESTART; 1814 } 1815 break; 1816 } 1817 1818 if ((sense_flags & SF_PRINT_ALWAYS) || 1819 CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO)) 1820 action |= SSQ_PRINT_SENSE; 1821 else if (sense_flags & SF_NO_PRINT) 1822 action &= ~SSQ_PRINT_SENSE; 1823 if ((action & SSQ_PRINT_SENSE) != 0) 1824 cam_error_print(orig_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1825 if (error != 0 && (action & SSQ_PRINT_SENSE) != 0) { 1826 if (error != ERESTART) { 1827 if (action_string == NULL) 1828 action_string = "Unretryable error"; 1829 xpt_print(ccb->ccb_h.path, "Error %d, %s\n", 1830 error, action_string); 1831 } else if (action_string != NULL) 1832 xpt_print(ccb->ccb_h.path, "%s\n", action_string); 1833 else 1834 xpt_print(ccb->ccb_h.path, "Retrying command\n"); 1835 } 1836 1837 if (devctl_err && (error != 0 || (action & SSQ_PRINT_SENSE) != 0)) 1838 cam_periph_devctl_notify(orig_ccb); 1839 1840 if ((action & SSQ_LOST) != 0) { 1841 lun_id_t lun_id; 1842 1843 /* 1844 * For a selection timeout, we consider all of the LUNs on 1845 * the target to be gone. If the status is CAM_DEV_NOT_THERE, 1846 * then we only get rid of the device(s) specified by the 1847 * path in the original CCB. 1848 */ 1849 if (status == CAM_SEL_TIMEOUT) 1850 lun_id = CAM_LUN_WILDCARD; 1851 else 1852 lun_id = xpt_path_lun_id(ccb->ccb_h.path); 1853 1854 /* Should we do more if we can't create the path?? */ 1855 if (xpt_create_path(&newpath, periph, 1856 xpt_path_path_id(ccb->ccb_h.path), 1857 xpt_path_target_id(ccb->ccb_h.path), 1858 lun_id) == CAM_REQ_CMP) { 1859 1860 /* 1861 * Let peripheral drivers know that this 1862 * device has gone away. 1863 */ 1864 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1865 xpt_free_path(newpath); 1866 } 1867 } 1868 1869 /* Broadcast UNIT ATTENTIONs to all periphs. */ 1870 if ((action & SSQ_UA) != 0) 1871 xpt_async(AC_UNIT_ATTENTION, orig_ccb->ccb_h.path, orig_ccb); 1872 1873 /* Rescan target on "Reported LUNs data has changed" */ 1874 if ((action & SSQ_RESCAN) != 0) { 1875 if (xpt_create_path(&newpath, NULL, 1876 xpt_path_path_id(ccb->ccb_h.path), 1877 xpt_path_target_id(ccb->ccb_h.path), 1878 CAM_LUN_WILDCARD) == CAM_REQ_CMP) { 1879 1880 scan_ccb = xpt_alloc_ccb_nowait(); 1881 if (scan_ccb != NULL) { 1882 scan_ccb->ccb_h.path = newpath; 1883 scan_ccb->ccb_h.func_code = XPT_SCAN_TGT; 1884 scan_ccb->crcn.flags = 0; 1885 xpt_rescan(scan_ccb); 1886 } else { 1887 xpt_print(newpath, 1888 "Can't allocate CCB to rescan target\n"); 1889 xpt_free_path(newpath); 1890 } 1891 } 1892 } 1893 1894 /* Attempt a retry */ 1895 if (error == ERESTART || error == 0) { 1896 if (frozen != 0) 1897 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1898 if (error == ERESTART) 1899 xpt_action(ccb); 1900 if (frozen != 0) 1901 cam_release_devq(ccb->ccb_h.path, 1902 relsim_flags, 1903 openings, 1904 timeout, 1905 /*getcount_only*/0); 1906 } 1907 1908 return (error); 1909 } 1910 1911 #define CAM_PERIPH_DEVD_MSG_SIZE 256 1912 1913 static void 1914 cam_periph_devctl_notify(union ccb *ccb) 1915 { 1916 struct cam_periph *periph; 1917 struct ccb_getdev *cgd; 1918 struct sbuf sb; 1919 int serr, sk, asc, ascq; 1920 char *sbmsg, *type; 1921 1922 sbmsg = malloc(CAM_PERIPH_DEVD_MSG_SIZE, M_CAMPERIPH, M_NOWAIT); 1923 if (sbmsg == NULL) 1924 return; 1925 1926 sbuf_new(&sb, sbmsg, CAM_PERIPH_DEVD_MSG_SIZE, SBUF_FIXEDLEN); 1927 1928 periph = xpt_path_periph(ccb->ccb_h.path); 1929 sbuf_printf(&sb, "device=%s%d ", periph->periph_name, 1930 periph->unit_number); 1931 1932 sbuf_printf(&sb, "serial=\""); 1933 if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) != NULL) { 1934 xpt_setup_ccb(&cgd->ccb_h, ccb->ccb_h.path, 1935 CAM_PRIORITY_NORMAL); 1936 cgd->ccb_h.func_code = XPT_GDEV_TYPE; 1937 xpt_action((union ccb *)cgd); 1938 1939 if (cgd->ccb_h.status == CAM_REQ_CMP) 1940 sbuf_bcat(&sb, cgd->serial_num, cgd->serial_num_len); 1941 xpt_free_ccb((union ccb *)cgd); 1942 } 1943 sbuf_printf(&sb, "\" "); 1944 sbuf_printf(&sb, "cam_status=\"0x%x\" ", ccb->ccb_h.status); 1945 1946 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1947 case CAM_CMD_TIMEOUT: 1948 sbuf_printf(&sb, "timeout=%d ", ccb->ccb_h.timeout); 1949 type = "timeout"; 1950 break; 1951 case CAM_SCSI_STATUS_ERROR: 1952 sbuf_printf(&sb, "scsi_status=%d ", ccb->csio.scsi_status); 1953 if (scsi_extract_sense_ccb(ccb, &serr, &sk, &asc, &ascq)) 1954 sbuf_printf(&sb, "scsi_sense=\"%02x %02x %02x %02x\" ", 1955 serr, sk, asc, ascq); 1956 type = "error"; 1957 break; 1958 case CAM_ATA_STATUS_ERROR: 1959 sbuf_printf(&sb, "RES=\""); 1960 ata_res_sbuf(&ccb->ataio.res, &sb); 1961 sbuf_printf(&sb, "\" "); 1962 type = "error"; 1963 break; 1964 default: 1965 type = "error"; 1966 break; 1967 } 1968 1969 if (ccb->ccb_h.func_code == XPT_SCSI_IO) { 1970 sbuf_printf(&sb, "CDB=\""); 1971 scsi_cdb_sbuf(scsiio_cdb_ptr(&ccb->csio), &sb); 1972 sbuf_printf(&sb, "\" "); 1973 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) { 1974 sbuf_printf(&sb, "ACB=\""); 1975 ata_cmd_sbuf(&ccb->ataio.cmd, &sb); 1976 sbuf_printf(&sb, "\" "); 1977 } 1978 1979 if (sbuf_finish(&sb) == 0) 1980 devctl_notify("CAM", "periph", type, sbuf_data(&sb)); 1981 sbuf_delete(&sb); 1982 free(sbmsg, M_CAMPERIPH); 1983 } 1984 1985