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sys/cam/cam_periph.c
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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: releng/5.3/sys/cam/cam_periph.c 122307 2003-11-08 10:56:57Z scottl $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/types.h> 36 #include <sys/malloc.h> 37 #include <sys/linker_set.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 <vm/vm.h> 46 #include <vm/vm_extern.h> 47 48 #include <cam/cam.h> 49 #include <cam/cam_ccb.h> 50 #include <cam/cam_xpt_periph.h> 51 #include <cam/cam_periph.h> 52 #include <cam/cam_debug.h> 53 54 #include <cam/scsi/scsi_all.h> 55 #include <cam/scsi/scsi_message.h> 56 #include <cam/scsi/scsi_pass.h> 57 58 static u_int camperiphnextunit(struct periph_driver *p_drv, 59 u_int newunit, int wired, 60 path_id_t pathid, target_id_t target, 61 lun_id_t lun); 62 static u_int camperiphunit(struct periph_driver *p_drv, 63 path_id_t pathid, target_id_t target, 64 lun_id_t lun); 65 static void camperiphdone(struct cam_periph *periph, 66 union ccb *done_ccb); 67 static void camperiphfree(struct cam_periph *periph); 68 static int camperiphscsistatuserror(union ccb *ccb, 69 cam_flags camflags, 70 u_int32_t sense_flags, 71 union ccb *save_ccb, 72 int *openings, 73 u_int32_t *relsim_flags, 74 u_int32_t *timeout); 75 static int camperiphscsisenseerror(union ccb *ccb, 76 cam_flags camflags, 77 u_int32_t sense_flags, 78 union ccb *save_ccb, 79 int *openings, 80 u_int32_t *relsim_flags, 81 u_int32_t *timeout); 82 83 static int nperiph_drivers; 84 struct periph_driver **periph_drivers; 85 86 void 87 periphdriver_register(void *data) 88 { 89 struct periph_driver **newdrivers, **old; 90 int ndrivers; 91 92 ndrivers = nperiph_drivers + 2; 93 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK); 94 if (periph_drivers) 95 bcopy(periph_drivers, newdrivers, 96 sizeof(*newdrivers) * nperiph_drivers); 97 newdrivers[nperiph_drivers] = (struct periph_driver *)data; 98 newdrivers[nperiph_drivers + 1] = NULL; 99 old = periph_drivers; 100 periph_drivers = newdrivers; 101 if (old) 102 free(old, M_TEMP); 103 nperiph_drivers++; 104 } 105 106 cam_status 107 cam_periph_alloc(periph_ctor_t *periph_ctor, 108 periph_oninv_t *periph_oninvalidate, 109 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 110 char *name, cam_periph_type type, struct cam_path *path, 111 ac_callback_t *ac_callback, ac_code code, void *arg) 112 { 113 struct periph_driver **p_drv; 114 struct cam_periph *periph; 115 struct cam_periph *cur_periph; 116 path_id_t path_id; 117 target_id_t target_id; 118 lun_id_t lun_id; 119 cam_status status; 120 u_int init_level; 121 int s; 122 123 init_level = 0; 124 /* 125 * Handle Hot-Plug scenarios. If there is already a peripheral 126 * of our type assigned to this path, we are likely waiting for 127 * final close on an old, invalidated, peripheral. If this is 128 * the case, queue up a deferred call to the peripheral's async 129 * handler. If it looks like a mistaken re-alloation, complain. 130 */ 131 if ((periph = cam_periph_find(path, name)) != NULL) { 132 133 if ((periph->flags & CAM_PERIPH_INVALID) != 0 134 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 135 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 136 periph->deferred_callback = ac_callback; 137 periph->deferred_ac = code; 138 return (CAM_REQ_INPROG); 139 } else { 140 printf("cam_periph_alloc: attempt to re-allocate " 141 "valid device %s%d rejected\n", 142 periph->periph_name, periph->unit_number); 143 } 144 return (CAM_REQ_INVALID); 145 } 146 147 periph = (struct cam_periph *)malloc(sizeof(*periph), M_DEVBUF, 148 M_NOWAIT); 149 150 if (periph == NULL) 151 return (CAM_RESRC_UNAVAIL); 152 153 init_level++; 154 155 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 156 if (strcmp((*p_drv)->driver_name, name) == 0) 157 break; 158 } 159 160 path_id = xpt_path_path_id(path); 161 target_id = xpt_path_target_id(path); 162 lun_id = xpt_path_lun_id(path); 163 bzero(periph, sizeof(*periph)); 164 cam_init_pinfo(&periph->pinfo); 165 periph->periph_start = periph_start; 166 periph->periph_dtor = periph_dtor; 167 periph->periph_oninval = periph_oninvalidate; 168 periph->type = type; 169 periph->periph_name = name; 170 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 171 periph->immediate_priority = CAM_PRIORITY_NONE; 172 periph->refcount = 0; 173 SLIST_INIT(&periph->ccb_list); 174 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 175 if (status != CAM_REQ_CMP) 176 goto failure; 177 178 periph->path = path; 179 init_level++; 180 181 status = xpt_add_periph(periph); 182 183 if (status != CAM_REQ_CMP) 184 goto failure; 185 186 s = splsoftcam(); 187 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 188 while (cur_periph != NULL 189 && cur_periph->unit_number < periph->unit_number) 190 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 191 192 if (cur_periph != NULL) 193 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 194 else { 195 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 196 (*p_drv)->generation++; 197 } 198 199 splx(s); 200 201 init_level++; 202 203 status = periph_ctor(periph, arg); 204 205 if (status == CAM_REQ_CMP) 206 init_level++; 207 208 failure: 209 switch (init_level) { 210 case 4: 211 /* Initialized successfully */ 212 break; 213 case 3: 214 s = splsoftcam(); 215 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 216 splx(s); 217 xpt_remove_periph(periph); 218 /* FALLTHROUGH */ 219 case 2: 220 xpt_free_path(periph->path); 221 /* FALLTHROUGH */ 222 case 1: 223 free(periph, M_DEVBUF); 224 /* FALLTHROUGH */ 225 case 0: 226 /* No cleanup to perform. */ 227 break; 228 default: 229 panic("cam_periph_alloc: Unkown init level"); 230 } 231 return(status); 232 } 233 234 /* 235 * Find a peripheral structure with the specified path, target, lun, 236 * and (optionally) type. If the name is NULL, this function will return 237 * the first peripheral driver that matches the specified path. 238 */ 239 struct cam_periph * 240 cam_periph_find(struct cam_path *path, char *name) 241 { 242 struct periph_driver **p_drv; 243 struct cam_periph *periph; 244 int s; 245 246 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 247 248 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 249 continue; 250 251 s = splsoftcam(); 252 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 253 if (xpt_path_comp(periph->path, path) == 0) { 254 splx(s); 255 return(periph); 256 } 257 } 258 splx(s); 259 if (name != NULL) 260 return(NULL); 261 } 262 return(NULL); 263 } 264 265 cam_status 266 cam_periph_acquire(struct cam_periph *periph) 267 { 268 int s; 269 270 if (periph == NULL) 271 return(CAM_REQ_CMP_ERR); 272 273 s = splsoftcam(); 274 periph->refcount++; 275 splx(s); 276 277 return(CAM_REQ_CMP); 278 } 279 280 void 281 cam_periph_release(struct cam_periph *periph) 282 { 283 int s; 284 285 if (periph == NULL) 286 return; 287 288 s = splsoftcam(); 289 if ((--periph->refcount == 0) 290 && (periph->flags & CAM_PERIPH_INVALID)) { 291 camperiphfree(periph); 292 } 293 splx(s); 294 295 } 296 297 /* 298 * Look for the next unit number that is not currently in use for this 299 * peripheral type starting at "newunit". Also exclude unit numbers that 300 * are reserved by for future "hardwiring" unless we already know that this 301 * is a potential wired device. Only assume that the device is "wired" the 302 * first time through the loop since after that we'll be looking at unit 303 * numbers that did not match a wiring entry. 304 */ 305 static u_int 306 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired, 307 path_id_t pathid, target_id_t target, lun_id_t lun) 308 { 309 struct cam_periph *periph; 310 char *periph_name; 311 int s; 312 int i, val, dunit, r; 313 const char *dname, *strval; 314 315 s = splsoftcam(); 316 periph_name = p_drv->driver_name; 317 for (;;newunit++) { 318 319 for (periph = TAILQ_FIRST(&p_drv->units); 320 periph != NULL && periph->unit_number != newunit; 321 periph = TAILQ_NEXT(periph, unit_links)) 322 ; 323 324 if (periph != NULL && periph->unit_number == newunit) { 325 if (wired != 0) { 326 xpt_print_path(periph->path); 327 printf("Duplicate Wired Device entry!\n"); 328 xpt_print_path(periph->path); 329 printf("Second device (%s device at scbus%d " 330 "target %d lun %d) will not be wired\n", 331 periph_name, pathid, target, lun); 332 wired = 0; 333 } 334 continue; 335 } 336 if (wired) 337 break; 338 339 /* 340 * Don't match entries like "da 4" as a wired down 341 * device, but do match entries like "da 4 target 5" 342 * or even "da 4 scbus 1". 343 */ 344 i = 0; 345 dname = periph_name; 346 for (;;) { 347 r = resource_find_dev(&i, dname, &dunit, NULL, NULL); 348 if (r != 0) 349 break; 350 /* if no "target" and no specific scbus, skip */ 351 if (resource_int_value(dname, dunit, "target", &val) && 352 (resource_string_value(dname, dunit, "at",&strval)|| 353 strcmp(strval, "scbus") == 0)) 354 continue; 355 if (newunit == dunit) 356 break; 357 } 358 if (r != 0) 359 break; 360 } 361 splx(s); 362 return (newunit); 363 } 364 365 static u_int 366 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 367 target_id_t target, lun_id_t lun) 368 { 369 u_int unit; 370 int wired, i, val, dunit; 371 const char *dname, *strval; 372 char pathbuf[32], *periph_name; 373 374 periph_name = p_drv->driver_name; 375 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid); 376 unit = 0; 377 i = 0; 378 dname = periph_name; 379 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0; 380 wired = 0) { 381 if (resource_string_value(dname, dunit, "at", &strval) == 0) { 382 if (strcmp(strval, pathbuf) != 0) 383 continue; 384 wired++; 385 } 386 if (resource_int_value(dname, dunit, "target", &val) == 0) { 387 if (val != target) 388 continue; 389 wired++; 390 } 391 if (resource_int_value(dname, dunit, "lun", &val) == 0) { 392 if (val != lun) 393 continue; 394 wired++; 395 } 396 if (wired != 0) { 397 unit = dunit; 398 break; 399 } 400 } 401 402 /* 403 * Either start from 0 looking for the next unit or from 404 * the unit number given in the resource config. This way, 405 * if we have wildcard matches, we don't return the same 406 * unit number twice. 407 */ 408 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun); 409 410 return (unit); 411 } 412 413 void 414 cam_periph_invalidate(struct cam_periph *periph) 415 { 416 int s; 417 418 s = splsoftcam(); 419 /* 420 * We only call this routine the first time a peripheral is 421 * invalidated. The oninvalidate() routine is always called at 422 * splsoftcam(). 423 */ 424 if (((periph->flags & CAM_PERIPH_INVALID) == 0) 425 && (periph->periph_oninval != NULL)) 426 periph->periph_oninval(periph); 427 428 periph->flags |= CAM_PERIPH_INVALID; 429 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 430 431 if (periph->refcount == 0) 432 camperiphfree(periph); 433 else if (periph->refcount < 0) 434 printf("cam_invalidate_periph: refcount < 0!!\n"); 435 splx(s); 436 } 437 438 static void 439 camperiphfree(struct cam_periph *periph) 440 { 441 int s; 442 struct periph_driver **p_drv; 443 444 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 445 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 446 break; 447 } 448 449 if (periph->periph_dtor != NULL) 450 periph->periph_dtor(periph); 451 452 s = splsoftcam(); 453 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 454 (*p_drv)->generation++; 455 splx(s); 456 457 xpt_remove_periph(periph); 458 459 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 460 union ccb ccb; 461 void *arg; 462 463 switch (periph->deferred_ac) { 464 case AC_FOUND_DEVICE: 465 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 466 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 467 xpt_action(&ccb); 468 arg = &ccb; 469 break; 470 case AC_PATH_REGISTERED: 471 ccb.ccb_h.func_code = XPT_PATH_INQ; 472 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 473 xpt_action(&ccb); 474 arg = &ccb; 475 break; 476 default: 477 arg = NULL; 478 break; 479 } 480 periph->deferred_callback(NULL, periph->deferred_ac, 481 periph->path, arg); 482 } 483 xpt_free_path(periph->path); 484 free(periph, M_DEVBUF); 485 } 486 487 /* 488 * Wait interruptibly for an exclusive lock. 489 */ 490 int 491 cam_periph_lock(struct cam_periph *periph, int priority) 492 { 493 int error; 494 495 /* 496 * Increment the reference count on the peripheral 497 * while we wait for our lock attempt to succeed 498 * to ensure the peripheral doesn't disappear out 499 * from under us while we sleep. 500 */ 501 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 502 return(ENXIO); 503 504 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 505 periph->flags |= CAM_PERIPH_LOCK_WANTED; 506 if ((error = tsleep(periph, priority, "caplck", 0)) != 0) { 507 cam_periph_release(periph); 508 return error; 509 } 510 } 511 512 periph->flags |= CAM_PERIPH_LOCKED; 513 return 0; 514 } 515 516 /* 517 * Unlock and wake up any waiters. 518 */ 519 void 520 cam_periph_unlock(struct cam_periph *periph) 521 { 522 periph->flags &= ~CAM_PERIPH_LOCKED; 523 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 524 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 525 wakeup(periph); 526 } 527 528 cam_periph_release(periph); 529 } 530 531 /* 532 * Map user virtual pointers into kernel virtual address space, so we can 533 * access the memory. This won't work on physical pointers, for now it's 534 * up to the caller to check for that. (XXX KDM -- should we do that here 535 * instead?) This also only works for up to MAXPHYS memory. Since we use 536 * buffers to map stuff in and out, we're limited to the buffer size. 537 */ 538 int 539 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 540 { 541 int numbufs, i, j; 542 int flags[CAM_PERIPH_MAXMAPS]; 543 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 544 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 545 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 546 547 switch(ccb->ccb_h.func_code) { 548 case XPT_DEV_MATCH: 549 if (ccb->cdm.match_buf_len == 0) { 550 printf("cam_periph_mapmem: invalid match buffer " 551 "length 0\n"); 552 return(EINVAL); 553 } 554 if (ccb->cdm.pattern_buf_len > 0) { 555 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 556 lengths[0] = ccb->cdm.pattern_buf_len; 557 dirs[0] = CAM_DIR_OUT; 558 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 559 lengths[1] = ccb->cdm.match_buf_len; 560 dirs[1] = CAM_DIR_IN; 561 numbufs = 2; 562 } else { 563 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 564 lengths[0] = ccb->cdm.match_buf_len; 565 dirs[0] = CAM_DIR_IN; 566 numbufs = 1; 567 } 568 break; 569 case XPT_SCSI_IO: 570 case XPT_CONT_TARGET_IO: 571 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 572 return(0); 573 574 data_ptrs[0] = &ccb->csio.data_ptr; 575 lengths[0] = ccb->csio.dxfer_len; 576 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 577 numbufs = 1; 578 break; 579 default: 580 return(EINVAL); 581 break; /* NOTREACHED */ 582 } 583 584 /* 585 * Check the transfer length and permissions first, so we don't 586 * have to unmap any previously mapped buffers. 587 */ 588 for (i = 0; i < numbufs; i++) { 589 590 flags[i] = 0; 591 592 /* 593 * The userland data pointer passed in may not be page 594 * aligned. vmapbuf() truncates the address to a page 595 * boundary, so if the address isn't page aligned, we'll 596 * need enough space for the given transfer length, plus 597 * whatever extra space is necessary to make it to the page 598 * boundary. 599 */ 600 if ((lengths[i] + 601 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){ 602 printf("cam_periph_mapmem: attempt to map %lu bytes, " 603 "which is greater than DFLTPHYS(%d)\n", 604 (long)(lengths[i] + 605 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 606 DFLTPHYS); 607 return(E2BIG); 608 } 609 610 if (dirs[i] & CAM_DIR_OUT) { 611 flags[i] = BIO_WRITE; 612 } 613 614 if (dirs[i] & CAM_DIR_IN) { 615 flags[i] = BIO_READ; 616 } 617 618 } 619 620 /* this keeps the current process from getting swapped */ 621 /* 622 * XXX KDM should I use P_NOSWAP instead? 623 */ 624 PHOLD(curproc); 625 626 for (i = 0; i < numbufs; i++) { 627 /* 628 * Get the buffer. 629 */ 630 mapinfo->bp[i] = getpbuf(NULL); 631 632 /* save the buffer's data address */ 633 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data; 634 635 /* put our pointer in the data slot */ 636 mapinfo->bp[i]->b_data = *data_ptrs[i]; 637 638 /* set the transfer length, we know it's < DFLTPHYS */ 639 mapinfo->bp[i]->b_bufsize = lengths[i]; 640 641 /* set the direction */ 642 mapinfo->bp[i]->b_iocmd = flags[i]; 643 644 /* 645 * Map the buffer into kernel memory. 646 * 647 * Note that useracc() alone is not a sufficient test. 648 * vmapbuf() can still fail due to a smaller file mapped 649 * into a larger area of VM, or if userland races against 650 * vmapbuf() after the useracc() check. 651 */ 652 if (vmapbuf(mapinfo->bp[i]) < 0) { 653 for (j = 0; j < i; ++j) { 654 *data_ptrs[j] = mapinfo->bp[j]->b_saveaddr; 655 vunmapbuf(mapinfo->bp[j]); 656 relpbuf(mapinfo->bp[j], NULL); 657 } 658 relpbuf(mapinfo->bp[i], NULL); 659 PRELE(curproc); 660 return(EACCES); 661 } 662 663 /* set our pointer to the new mapped area */ 664 *data_ptrs[i] = mapinfo->bp[i]->b_data; 665 666 mapinfo->num_bufs_used++; 667 } 668 669 return(0); 670 } 671 672 /* 673 * Unmap memory segments mapped into kernel virtual address space by 674 * cam_periph_mapmem(). 675 */ 676 void 677 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 678 { 679 int numbufs, i; 680 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 681 682 if (mapinfo->num_bufs_used <= 0) { 683 /* allow ourselves to be swapped once again */ 684 PRELE(curproc); 685 return; 686 } 687 688 switch (ccb->ccb_h.func_code) { 689 case XPT_DEV_MATCH: 690 numbufs = min(mapinfo->num_bufs_used, 2); 691 692 if (numbufs == 1) { 693 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 694 } else { 695 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 696 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 697 } 698 break; 699 case XPT_SCSI_IO: 700 case XPT_CONT_TARGET_IO: 701 data_ptrs[0] = &ccb->csio.data_ptr; 702 numbufs = min(mapinfo->num_bufs_used, 1); 703 break; 704 default: 705 /* allow ourselves to be swapped once again */ 706 PRELE(curproc); 707 return; 708 break; /* NOTREACHED */ 709 } 710 711 for (i = 0; i < numbufs; i++) { 712 /* Set the user's pointer back to the original value */ 713 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr; 714 715 /* unmap the buffer */ 716 vunmapbuf(mapinfo->bp[i]); 717 718 /* release the buffer */ 719 relpbuf(mapinfo->bp[i], NULL); 720 } 721 722 /* allow ourselves to be swapped once again */ 723 PRELE(curproc); 724 } 725 726 union ccb * 727 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 728 { 729 struct ccb_hdr *ccb_h; 730 int s; 731 732 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n")); 733 734 s = splsoftcam(); 735 736 while (SLIST_FIRST(&periph->ccb_list) == NULL) { 737 if (periph->immediate_priority > priority) 738 periph->immediate_priority = priority; 739 xpt_schedule(periph, priority); 740 if ((SLIST_FIRST(&periph->ccb_list) != NULL) 741 && (SLIST_FIRST(&periph->ccb_list)->pinfo.priority == priority)) 742 break; 743 tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0); 744 } 745 746 ccb_h = SLIST_FIRST(&periph->ccb_list); 747 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 748 splx(s); 749 return ((union ccb *)ccb_h); 750 } 751 752 void 753 cam_periph_ccbwait(union ccb *ccb) 754 { 755 int s; 756 757 s = splsoftcam(); 758 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX) 759 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)) 760 tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0); 761 762 splx(s); 763 } 764 765 int 766 cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr, 767 int (*error_routine)(union ccb *ccb, 768 cam_flags camflags, 769 u_int32_t sense_flags)) 770 { 771 union ccb *ccb; 772 int error; 773 int found; 774 775 error = found = 0; 776 777 switch(cmd){ 778 case CAMGETPASSTHRU: 779 ccb = cam_periph_getccb(periph, /* priority */ 1); 780 xpt_setup_ccb(&ccb->ccb_h, 781 ccb->ccb_h.path, 782 /*priority*/1); 783 ccb->ccb_h.func_code = XPT_GDEVLIST; 784 785 /* 786 * Basically, the point of this is that we go through 787 * getting the list of devices, until we find a passthrough 788 * device. In the current version of the CAM code, the 789 * only way to determine what type of device we're dealing 790 * with is by its name. 791 */ 792 while (found == 0) { 793 ccb->cgdl.index = 0; 794 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 795 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 796 797 /* we want the next device in the list */ 798 xpt_action(ccb); 799 if (strncmp(ccb->cgdl.periph_name, 800 "pass", 4) == 0){ 801 found = 1; 802 break; 803 } 804 } 805 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 806 (found == 0)) { 807 ccb->cgdl.periph_name[0] = '\0'; 808 ccb->cgdl.unit_number = 0; 809 break; 810 } 811 } 812 813 /* copy the result back out */ 814 bcopy(ccb, addr, sizeof(union ccb)); 815 816 /* and release the ccb */ 817 xpt_release_ccb(ccb); 818 819 break; 820 default: 821 error = ENOTTY; 822 break; 823 } 824 return(error); 825 } 826 827 int 828 cam_periph_runccb(union ccb *ccb, 829 int (*error_routine)(union ccb *ccb, 830 cam_flags camflags, 831 u_int32_t sense_flags), 832 cam_flags camflags, u_int32_t sense_flags, 833 struct devstat *ds) 834 { 835 int error; 836 837 error = 0; 838 839 /* 840 * If the user has supplied a stats structure, and if we understand 841 * this particular type of ccb, record the transaction start. 842 */ 843 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 844 devstat_start_transaction(ds, NULL); 845 846 xpt_action(ccb); 847 848 do { 849 cam_periph_ccbwait(ccb); 850 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 851 error = 0; 852 else if (error_routine != NULL) 853 error = (*error_routine)(ccb, camflags, sense_flags); 854 else 855 error = 0; 856 857 } while (error == ERESTART); 858 859 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 860 cam_release_devq(ccb->ccb_h.path, 861 /* relsim_flags */0, 862 /* openings */0, 863 /* timeout */0, 864 /* getcount_only */ FALSE); 865 866 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 867 devstat_end_transaction(ds, 868 ccb->csio.dxfer_len, 869 ccb->csio.tag_action & 0xf, 870 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 871 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 872 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 873 DEVSTAT_WRITE : 874 DEVSTAT_READ, NULL, NULL); 875 876 return(error); 877 } 878 879 void 880 cam_freeze_devq(struct cam_path *path) 881 { 882 struct ccb_hdr ccb_h; 883 884 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 885 ccb_h.func_code = XPT_NOOP; 886 ccb_h.flags = CAM_DEV_QFREEZE; 887 xpt_action((union ccb *)&ccb_h); 888 } 889 890 u_int32_t 891 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 892 u_int32_t openings, u_int32_t timeout, 893 int getcount_only) 894 { 895 struct ccb_relsim crs; 896 897 xpt_setup_ccb(&crs.ccb_h, path, 898 /*priority*/1); 899 crs.ccb_h.func_code = XPT_REL_SIMQ; 900 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 901 crs.release_flags = relsim_flags; 902 crs.openings = openings; 903 crs.release_timeout = timeout; 904 xpt_action((union ccb *)&crs); 905 return (crs.qfrozen_cnt); 906 } 907 908 #define saved_ccb_ptr ppriv_ptr0 909 static void 910 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 911 { 912 union ccb *saved_ccb; 913 cam_status status; 914 int frozen; 915 int sense; 916 struct scsi_start_stop_unit *scsi_cmd; 917 u_int32_t relsim_flags, timeout; 918 u_int32_t qfrozen_cnt; 919 int xpt_done_ccb; 920 921 xpt_done_ccb = FALSE; 922 status = done_ccb->ccb_h.status; 923 frozen = (status & CAM_DEV_QFRZN) != 0; 924 sense = (status & CAM_AUTOSNS_VALID) != 0; 925 status &= CAM_STATUS_MASK; 926 927 timeout = 0; 928 relsim_flags = 0; 929 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 930 931 /* 932 * Unfreeze the queue once if it is already frozen.. 933 */ 934 if (frozen != 0) { 935 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 936 /*relsim_flags*/0, 937 /*openings*/0, 938 /*timeout*/0, 939 /*getcount_only*/0); 940 } 941 942 switch (status) { 943 case CAM_REQ_CMP: 944 { 945 /* 946 * If we have successfully taken a device from the not 947 * ready to ready state, re-scan the device and re-get 948 * the inquiry information. Many devices (mostly disks) 949 * don't properly report their inquiry information unless 950 * they are spun up. 951 * 952 * If we manually retrieved sense into a CCB and got 953 * something other than "NO SENSE" send the updated CCB 954 * back to the client via xpt_done() to be processed via 955 * the error recovery code again. 956 */ 957 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) { 958 scsi_cmd = (struct scsi_start_stop_unit *) 959 &done_ccb->csio.cdb_io.cdb_bytes; 960 961 if (scsi_cmd->opcode == START_STOP_UNIT) 962 xpt_async(AC_INQ_CHANGED, 963 done_ccb->ccb_h.path, NULL); 964 if (scsi_cmd->opcode == REQUEST_SENSE) { 965 u_int sense_key; 966 967 sense_key = saved_ccb->csio.sense_data.flags; 968 sense_key &= SSD_KEY; 969 if (sense_key != SSD_KEY_NO_SENSE) { 970 saved_ccb->ccb_h.status |= 971 CAM_AUTOSNS_VALID; 972 #if 0 973 xpt_print_path(saved_ccb->ccb_h.path); 974 printf("Recovered Sense\n"); 975 scsi_sense_print(&saved_ccb->csio); 976 cam_error_print(saved_ccb, CAM_ESF_ALL, 977 CAM_EPF_ALL); 978 #endif 979 xpt_done_ccb = TRUE; 980 } 981 } 982 } 983 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 984 sizeof(union ccb)); 985 986 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 987 988 if (xpt_done_ccb == FALSE) 989 xpt_action(done_ccb); 990 991 break; 992 } 993 case CAM_SCSI_STATUS_ERROR: 994 scsi_cmd = (struct scsi_start_stop_unit *) 995 &done_ccb->csio.cdb_io.cdb_bytes; 996 if (sense != 0) { 997 struct ccb_getdev cgd; 998 struct scsi_sense_data *sense; 999 int error_code, sense_key, asc, ascq; 1000 scsi_sense_action err_action; 1001 1002 sense = &done_ccb->csio.sense_data; 1003 scsi_extract_sense(sense, &error_code, 1004 &sense_key, &asc, &ascq); 1005 1006 /* 1007 * Grab the inquiry data for this device. 1008 */ 1009 xpt_setup_ccb(&cgd.ccb_h, done_ccb->ccb_h.path, 1010 /*priority*/ 1); 1011 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1012 xpt_action((union ccb *)&cgd); 1013 err_action = scsi_error_action(&done_ccb->csio, 1014 &cgd.inq_data, 0); 1015 1016 /* 1017 * If the error is "invalid field in CDB", 1018 * and the load/eject flag is set, turn the 1019 * flag off and try again. This is just in 1020 * case the drive in question barfs on the 1021 * load eject flag. The CAM code should set 1022 * the load/eject flag by default for 1023 * removable media. 1024 */ 1025 1026 /* XXX KDM 1027 * Should we check to see what the specific 1028 * scsi status is?? Or does it not matter 1029 * since we already know that there was an 1030 * error, and we know what the specific 1031 * error code was, and we know what the 1032 * opcode is.. 1033 */ 1034 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1035 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1036 (asc == 0x24) && (ascq == 0x00) && 1037 (done_ccb->ccb_h.retry_count > 0)) { 1038 1039 scsi_cmd->how &= ~SSS_LOEJ; 1040 1041 xpt_action(done_ccb); 1042 1043 } else if ((done_ccb->ccb_h.retry_count > 1) 1044 && ((err_action & SS_MASK) != SS_FAIL)) { 1045 1046 /* 1047 * In this case, the error recovery 1048 * command failed, but we've got 1049 * some retries left on it. Give 1050 * it another try unless this is an 1051 * unretryable error. 1052 */ 1053 1054 /* set the timeout to .5 sec */ 1055 relsim_flags = 1056 RELSIM_RELEASE_AFTER_TIMEOUT; 1057 timeout = 500; 1058 1059 xpt_action(done_ccb); 1060 1061 break; 1062 1063 } else { 1064 /* 1065 * Perform the final retry with the original 1066 * CCB so that final error processing is 1067 * performed by the owner of the CCB. 1068 */ 1069 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1070 done_ccb, sizeof(union ccb)); 1071 1072 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1073 1074 xpt_action(done_ccb); 1075 } 1076 } else { 1077 /* 1078 * Eh?? The command failed, but we don't 1079 * have any sense. What's up with that? 1080 * Fire the CCB again to return it to the 1081 * caller. 1082 */ 1083 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1084 done_ccb, sizeof(union ccb)); 1085 1086 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1087 1088 xpt_action(done_ccb); 1089 1090 } 1091 break; 1092 default: 1093 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 1094 sizeof(union ccb)); 1095 1096 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1097 1098 xpt_action(done_ccb); 1099 1100 break; 1101 } 1102 1103 /* decrement the retry count */ 1104 /* 1105 * XXX This isn't appropriate in all cases. Restructure, 1106 * so that the retry count is only decremented on an 1107 * actual retry. Remeber that the orignal ccb had its 1108 * retry count dropped before entering recovery, so 1109 * doing it again is a bug. 1110 */ 1111 if (done_ccb->ccb_h.retry_count > 0) 1112 done_ccb->ccb_h.retry_count--; 1113 1114 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 1115 /*relsim_flags*/relsim_flags, 1116 /*openings*/0, 1117 /*timeout*/timeout, 1118 /*getcount_only*/0); 1119 if (xpt_done_ccb == TRUE) 1120 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 1121 } 1122 1123 /* 1124 * Generic Async Event handler. Peripheral drivers usually 1125 * filter out the events that require personal attention, 1126 * and leave the rest to this function. 1127 */ 1128 void 1129 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1130 struct cam_path *path, void *arg) 1131 { 1132 switch (code) { 1133 case AC_LOST_DEVICE: 1134 cam_periph_invalidate(periph); 1135 break; 1136 case AC_SENT_BDR: 1137 case AC_BUS_RESET: 1138 { 1139 cam_periph_bus_settle(periph, scsi_delay); 1140 break; 1141 } 1142 default: 1143 break; 1144 } 1145 } 1146 1147 void 1148 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1149 { 1150 struct ccb_getdevstats cgds; 1151 1152 xpt_setup_ccb(&cgds.ccb_h, periph->path, /*priority*/1); 1153 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1154 xpt_action((union ccb *)&cgds); 1155 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1156 } 1157 1158 void 1159 cam_periph_freeze_after_event(struct cam_periph *periph, 1160 struct timeval* event_time, u_int duration_ms) 1161 { 1162 struct timeval delta; 1163 struct timeval duration_tv; 1164 int s; 1165 1166 s = splclock(); 1167 microtime(&delta); 1168 splx(s); 1169 timevalsub(&delta, event_time); 1170 duration_tv.tv_sec = duration_ms / 1000; 1171 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1172 if (timevalcmp(&delta, &duration_tv, <)) { 1173 timevalsub(&duration_tv, &delta); 1174 1175 duration_ms = duration_tv.tv_sec * 1000; 1176 duration_ms += duration_tv.tv_usec / 1000; 1177 cam_freeze_devq(periph->path); 1178 cam_release_devq(periph->path, 1179 RELSIM_RELEASE_AFTER_TIMEOUT, 1180 /*reduction*/0, 1181 /*timeout*/duration_ms, 1182 /*getcount_only*/0); 1183 } 1184 1185 } 1186 1187 static int 1188 camperiphscsistatuserror(union ccb *ccb, cam_flags camflags, 1189 u_int32_t sense_flags, union ccb *save_ccb, 1190 int *openings, u_int32_t *relsim_flags, 1191 u_int32_t *timeout) 1192 { 1193 int error; 1194 1195 switch (ccb->csio.scsi_status) { 1196 case SCSI_STATUS_OK: 1197 case SCSI_STATUS_COND_MET: 1198 case SCSI_STATUS_INTERMED: 1199 case SCSI_STATUS_INTERMED_COND_MET: 1200 error = 0; 1201 break; 1202 case SCSI_STATUS_CMD_TERMINATED: 1203 case SCSI_STATUS_CHECK_COND: 1204 error = camperiphscsisenseerror(ccb, 1205 camflags, 1206 sense_flags, 1207 save_ccb, 1208 openings, 1209 relsim_flags, 1210 timeout); 1211 break; 1212 case SCSI_STATUS_QUEUE_FULL: 1213 { 1214 /* no decrement */ 1215 struct ccb_getdevstats cgds; 1216 1217 /* 1218 * First off, find out what the current 1219 * transaction counts are. 1220 */ 1221 xpt_setup_ccb(&cgds.ccb_h, 1222 ccb->ccb_h.path, 1223 /*priority*/1); 1224 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1225 xpt_action((union ccb *)&cgds); 1226 1227 /* 1228 * If we were the only transaction active, treat 1229 * the QUEUE FULL as if it were a BUSY condition. 1230 */ 1231 if (cgds.dev_active != 0) { 1232 int total_openings; 1233 1234 /* 1235 * Reduce the number of openings to 1236 * be 1 less than the amount it took 1237 * to get a queue full bounded by the 1238 * minimum allowed tag count for this 1239 * device. 1240 */ 1241 total_openings = cgds.dev_active + cgds.dev_openings; 1242 *openings = cgds.dev_active; 1243 if (*openings < cgds.mintags) 1244 *openings = cgds.mintags; 1245 if (*openings < total_openings) 1246 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1247 else { 1248 /* 1249 * Some devices report queue full for 1250 * temporary resource shortages. For 1251 * this reason, we allow a minimum 1252 * tag count to be entered via a 1253 * quirk entry to prevent the queue 1254 * count on these devices from falling 1255 * to a pessimisticly low value. We 1256 * still wait for the next successful 1257 * completion, however, before queueing 1258 * more transactions to the device. 1259 */ 1260 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1261 } 1262 *timeout = 0; 1263 error = ERESTART; 1264 if (bootverbose) { 1265 xpt_print_path(ccb->ccb_h.path); 1266 printf("Queue Full\n"); 1267 } 1268 break; 1269 } 1270 /* FALLTHROUGH */ 1271 } 1272 case SCSI_STATUS_BUSY: 1273 /* 1274 * Restart the queue after either another 1275 * command completes or a 1 second timeout. 1276 */ 1277 if (bootverbose) { 1278 xpt_print_path(ccb->ccb_h.path); 1279 printf("Device Busy\n"); 1280 } 1281 if (ccb->ccb_h.retry_count > 0) { 1282 ccb->ccb_h.retry_count--; 1283 error = ERESTART; 1284 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1285 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1286 *timeout = 1000; 1287 } else { 1288 error = EIO; 1289 } 1290 break; 1291 case SCSI_STATUS_RESERV_CONFLICT: 1292 xpt_print_path(ccb->ccb_h.path); 1293 printf("Reservation Conflict\n"); 1294 error = EIO; 1295 break; 1296 default: 1297 xpt_print_path(ccb->ccb_h.path); 1298 printf("SCSI Status 0x%x\n", ccb->csio.scsi_status); 1299 error = EIO; 1300 break; 1301 } 1302 return (error); 1303 } 1304 1305 static int 1306 camperiphscsisenseerror(union ccb *ccb, cam_flags camflags, 1307 u_int32_t sense_flags, union ccb *save_ccb, 1308 int *openings, u_int32_t *relsim_flags, 1309 u_int32_t *timeout) 1310 { 1311 struct cam_periph *periph; 1312 int error; 1313 1314 periph = xpt_path_periph(ccb->ccb_h.path); 1315 if (periph->flags & CAM_PERIPH_RECOVERY_INPROG) { 1316 1317 /* 1318 * If error recovery is already in progress, don't attempt 1319 * to process this error, but requeue it unconditionally 1320 * and attempt to process it once error recovery has 1321 * completed. This failed command is probably related to 1322 * the error that caused the currently active error recovery 1323 * action so our current recovery efforts should also 1324 * address this command. Be aware that the error recovery 1325 * code assumes that only one recovery action is in progress 1326 * on a particular peripheral instance at any given time 1327 * (e.g. only one saved CCB for error recovery) so it is 1328 * imperitive that we don't violate this assumption. 1329 */ 1330 error = ERESTART; 1331 } else { 1332 scsi_sense_action err_action; 1333 struct ccb_getdev cgd; 1334 const char *action_string; 1335 union ccb* print_ccb; 1336 1337 /* A description of the error recovery action performed */ 1338 action_string = NULL; 1339 1340 /* 1341 * The location of the orignal ccb 1342 * for sense printing purposes. 1343 */ 1344 print_ccb = ccb; 1345 1346 /* 1347 * Grab the inquiry data for this device. 1348 */ 1349 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, /*priority*/ 1); 1350 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1351 xpt_action((union ccb *)&cgd); 1352 1353 if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) 1354 err_action = scsi_error_action(&ccb->csio, 1355 &cgd.inq_data, 1356 sense_flags); 1357 else if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) 1358 err_action = SS_REQSENSE; 1359 else 1360 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1361 1362 error = err_action & SS_ERRMASK; 1363 1364 /* 1365 * If the recovery action will consume a retry, 1366 * make sure we actually have retries available. 1367 */ 1368 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1369 if (ccb->ccb_h.retry_count > 0) 1370 ccb->ccb_h.retry_count--; 1371 else { 1372 action_string = "Retries Exhausted"; 1373 goto sense_error_done; 1374 } 1375 } 1376 1377 if ((err_action & SS_MASK) >= SS_START) { 1378 /* 1379 * Do common portions of commands that 1380 * use recovery CCBs. 1381 */ 1382 if (save_ccb == NULL) { 1383 action_string = "No recovery CCB supplied"; 1384 goto sense_error_done; 1385 } 1386 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1387 print_ccb = save_ccb; 1388 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1389 } 1390 1391 switch (err_action & SS_MASK) { 1392 case SS_NOP: 1393 action_string = "No Recovery Action Needed"; 1394 error = 0; 1395 break; 1396 case SS_RETRY: 1397 action_string = "Retrying Command (per Sense Data)"; 1398 error = ERESTART; 1399 break; 1400 case SS_FAIL: 1401 action_string = "Unretryable error"; 1402 break; 1403 case SS_START: 1404 { 1405 int le; 1406 1407 /* 1408 * Send a start unit command to the device, and 1409 * then retry the command. 1410 */ 1411 action_string = "Attempting to Start Unit"; 1412 1413 /* 1414 * Check for removable media and set 1415 * load/eject flag appropriately. 1416 */ 1417 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1418 le = TRUE; 1419 else 1420 le = FALSE; 1421 1422 scsi_start_stop(&ccb->csio, 1423 /*retries*/1, 1424 camperiphdone, 1425 MSG_SIMPLE_Q_TAG, 1426 /*start*/TRUE, 1427 /*load/eject*/le, 1428 /*immediate*/FALSE, 1429 SSD_FULL_SIZE, 1430 /*timeout*/50000); 1431 break; 1432 } 1433 case SS_TUR: 1434 { 1435 /* 1436 * Send a Test Unit Ready to the device. 1437 * If the 'many' flag is set, we send 120 1438 * test unit ready commands, one every half 1439 * second. Otherwise, we just send one TUR. 1440 * We only want to do this if the retry 1441 * count has not been exhausted. 1442 */ 1443 int retries; 1444 1445 if ((err_action & SSQ_MANY) != 0) { 1446 action_string = "Polling device for readiness"; 1447 retries = 120; 1448 } else { 1449 action_string = "Testing device for readiness"; 1450 retries = 1; 1451 } 1452 scsi_test_unit_ready(&ccb->csio, 1453 retries, 1454 camperiphdone, 1455 MSG_SIMPLE_Q_TAG, 1456 SSD_FULL_SIZE, 1457 /*timeout*/5000); 1458 1459 /* 1460 * Accomplish our 500ms delay by deferring 1461 * the release of our device queue appropriately. 1462 */ 1463 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1464 *timeout = 500; 1465 break; 1466 } 1467 case SS_REQSENSE: 1468 { 1469 /* 1470 * Send a Request Sense to the device. We 1471 * assume that we are in a contingent allegiance 1472 * condition so we do not tag this request. 1473 */ 1474 scsi_request_sense(&ccb->csio, /*retries*/1, 1475 camperiphdone, 1476 &save_ccb->csio.sense_data, 1477 sizeof(save_ccb->csio.sense_data), 1478 CAM_TAG_ACTION_NONE, 1479 /*sense_len*/SSD_FULL_SIZE, 1480 /*timeout*/5000); 1481 break; 1482 } 1483 default: 1484 panic("Unhandled error action %x", err_action); 1485 } 1486 1487 if ((err_action & SS_MASK) >= SS_START) { 1488 /* 1489 * Drop the priority to 0 so that the recovery 1490 * CCB is the first to execute. Freeze the queue 1491 * after this command is sent so that we can 1492 * restore the old csio and have it queued in 1493 * the proper order before we release normal 1494 * transactions to the device. 1495 */ 1496 ccb->ccb_h.pinfo.priority = 0; 1497 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1498 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1499 error = ERESTART; 1500 } 1501 1502 sense_error_done: 1503 if ((err_action & SSQ_PRINT_SENSE) != 0 1504 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) { 1505 cam_error_print(print_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1506 xpt_print_path(ccb->ccb_h.path); 1507 if (bootverbose) 1508 scsi_sense_print(&print_ccb->csio); 1509 printf("%s\n", action_string); 1510 } 1511 } 1512 return (error); 1513 } 1514 1515 /* 1516 * Generic error handler. Peripheral drivers usually filter 1517 * out the errors that they handle in a unique mannor, then 1518 * call this function. 1519 */ 1520 int 1521 cam_periph_error(union ccb *ccb, cam_flags camflags, 1522 u_int32_t sense_flags, union ccb *save_ccb) 1523 { 1524 const char *action_string; 1525 cam_status status; 1526 int frozen; 1527 int error, printed = 0; 1528 int openings; 1529 u_int32_t relsim_flags; 1530 u_int32_t timeout; 1531 1532 action_string = NULL; 1533 status = ccb->ccb_h.status; 1534 frozen = (status & CAM_DEV_QFRZN) != 0; 1535 status &= CAM_STATUS_MASK; 1536 openings = relsim_flags = 0; 1537 1538 switch (status) { 1539 case CAM_REQ_CMP: 1540 error = 0; 1541 break; 1542 case CAM_SCSI_STATUS_ERROR: 1543 error = camperiphscsistatuserror(ccb, 1544 camflags, 1545 sense_flags, 1546 save_ccb, 1547 &openings, 1548 &relsim_flags, 1549 &timeout); 1550 break; 1551 case CAM_AUTOSENSE_FAIL: 1552 xpt_print_path(ccb->ccb_h.path); 1553 printf("AutoSense Failed\n"); 1554 error = EIO; /* we have to kill the command */ 1555 break; 1556 case CAM_REQ_CMP_ERR: 1557 if (bootverbose && printed == 0) { 1558 xpt_print_path(ccb->ccb_h.path); 1559 printf("Request completed with CAM_REQ_CMP_ERR\n"); 1560 printed++; 1561 } 1562 /* FALLTHROUGH */ 1563 case CAM_CMD_TIMEOUT: 1564 if (bootverbose && printed == 0) { 1565 xpt_print_path(ccb->ccb_h.path); 1566 printf("Command timed out\n"); 1567 printed++; 1568 } 1569 /* FALLTHROUGH */ 1570 case CAM_UNEXP_BUSFREE: 1571 if (bootverbose && printed == 0) { 1572 xpt_print_path(ccb->ccb_h.path); 1573 printf("Unexpected Bus Free\n"); 1574 printed++; 1575 } 1576 /* FALLTHROUGH */ 1577 case CAM_UNCOR_PARITY: 1578 if (bootverbose && printed == 0) { 1579 xpt_print_path(ccb->ccb_h.path); 1580 printf("Uncorrected Parity Error\n"); 1581 printed++; 1582 } 1583 /* FALLTHROUGH */ 1584 case CAM_DATA_RUN_ERR: 1585 if (bootverbose && printed == 0) { 1586 xpt_print_path(ccb->ccb_h.path); 1587 printf("Data Overrun\n"); 1588 printed++; 1589 } 1590 error = EIO; /* we have to kill the command */ 1591 /* decrement the number of retries */ 1592 if (ccb->ccb_h.retry_count > 0) { 1593 ccb->ccb_h.retry_count--; 1594 error = ERESTART; 1595 } else { 1596 action_string = "Retries Exausted"; 1597 error = EIO; 1598 } 1599 break; 1600 case CAM_UA_ABORT: 1601 case CAM_UA_TERMIO: 1602 case CAM_MSG_REJECT_REC: 1603 /* XXX Don't know that these are correct */ 1604 error = EIO; 1605 break; 1606 case CAM_SEL_TIMEOUT: 1607 { 1608 struct cam_path *newpath; 1609 1610 if ((camflags & CAM_RETRY_SELTO) != 0) { 1611 if (ccb->ccb_h.retry_count > 0) { 1612 1613 ccb->ccb_h.retry_count--; 1614 error = ERESTART; 1615 if (bootverbose && printed == 0) { 1616 xpt_print_path(ccb->ccb_h.path); 1617 printf("Selection Timeout\n"); 1618 printed++; 1619 } 1620 1621 /* 1622 * Wait a second to give the device 1623 * time to recover before we try again. 1624 */ 1625 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1626 timeout = 1000; 1627 break; 1628 } 1629 } 1630 error = ENXIO; 1631 /* Should we do more if we can't create the path?? */ 1632 if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path), 1633 xpt_path_path_id(ccb->ccb_h.path), 1634 xpt_path_target_id(ccb->ccb_h.path), 1635 CAM_LUN_WILDCARD) != CAM_REQ_CMP) 1636 break; 1637 1638 /* 1639 * Let peripheral drivers know that this device has gone 1640 * away. 1641 */ 1642 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1643 xpt_free_path(newpath); 1644 break; 1645 } 1646 case CAM_REQ_INVALID: 1647 case CAM_PATH_INVALID: 1648 case CAM_DEV_NOT_THERE: 1649 case CAM_NO_HBA: 1650 case CAM_PROVIDE_FAIL: 1651 case CAM_REQ_TOO_BIG: 1652 error = EINVAL; 1653 break; 1654 case CAM_SCSI_BUS_RESET: 1655 case CAM_BDR_SENT: 1656 /* 1657 * Commands that repeatedly timeout and cause these 1658 * kinds of error recovery actions, should return 1659 * CAM_CMD_TIMEOUT, which allows us to safely assume 1660 * that this command was an innocent bystander to 1661 * these events and should be unconditionally 1662 * retried. 1663 */ 1664 if (bootverbose && printed == 0) { 1665 xpt_print_path(ccb->ccb_h.path); 1666 if (status == CAM_BDR_SENT) 1667 printf("Bus Device Reset sent\n"); 1668 else 1669 printf("Bus Reset issued\n"); 1670 printed++; 1671 } 1672 /* FALLTHROUGH */ 1673 case CAM_REQUEUE_REQ: 1674 /* Unconditional requeue */ 1675 error = ERESTART; 1676 if (bootverbose && printed == 0) { 1677 xpt_print_path(ccb->ccb_h.path); 1678 printf("Request Requeued\n"); 1679 printed++; 1680 } 1681 break; 1682 case CAM_RESRC_UNAVAIL: 1683 case CAM_BUSY: 1684 /* timeout??? */ 1685 default: 1686 /* decrement the number of retries */ 1687 if (ccb->ccb_h.retry_count > 0) { 1688 ccb->ccb_h.retry_count--; 1689 error = ERESTART; 1690 if (bootverbose && printed == 0) { 1691 xpt_print_path(ccb->ccb_h.path); 1692 printf("CAM Status 0x%x\n", status); 1693 printed++; 1694 } 1695 } else { 1696 error = EIO; 1697 action_string = "Retries Exhausted"; 1698 } 1699 break; 1700 } 1701 1702 /* Attempt a retry */ 1703 if (error == ERESTART || error == 0) { 1704 if (frozen != 0) 1705 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1706 1707 if (error == ERESTART) { 1708 action_string = "Retrying Command"; 1709 xpt_action(ccb); 1710 } 1711 1712 if (frozen != 0) 1713 cam_release_devq(ccb->ccb_h.path, 1714 relsim_flags, 1715 openings, 1716 timeout, 1717 /*getcount_only*/0); 1718 } 1719 1720 /* 1721 * If we have and error and are booting verbosely, whine 1722 * *unless* this was a non-retryable selection timeout. 1723 */ 1724 if (error != 0 && bootverbose && 1725 !(status == CAM_SEL_TIMEOUT && (camflags & CAM_RETRY_SELTO) == 0)) { 1726 1727 1728 if (action_string == NULL) 1729 action_string = "Unretryable Error"; 1730 if (error != ERESTART) { 1731 xpt_print_path(ccb->ccb_h.path); 1732 printf("error %d\n", error); 1733 } 1734 xpt_print_path(ccb->ccb_h.path); 1735 printf("%s\n", action_string); 1736 } 1737 1738 return (error); 1739 }
Cache object: a73bdd2d66a485d704725b0685e6a55c
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