Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_periph.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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/6.1/sys/cam/cam_periph.c 156039 2006-02-26 22:38:39Z iedowse $"); 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/linker_set.h> 39 #include <sys/bio.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/buf.h> 43 #include <sys/proc.h> 44 #include <sys/devicestat.h> 45 #include <sys/bus.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_xpt_periph.h> 52 #include <cam/cam_periph.h> 53 #include <cam/cam_debug.h> 54 55 #include <cam/scsi/scsi_all.h> 56 #include <cam/scsi/scsi_message.h> 57 #include <cam/scsi/scsi_pass.h> 58 59 static u_int camperiphnextunit(struct periph_driver *p_drv, 60 u_int newunit, int wired, 61 path_id_t pathid, target_id_t target, 62 lun_id_t lun); 63 static u_int camperiphunit(struct periph_driver *p_drv, 64 path_id_t pathid, target_id_t target, 65 lun_id_t lun); 66 static void camperiphdone(struct cam_periph *periph, 67 union ccb *done_ccb); 68 static void camperiphfree(struct cam_periph *periph); 69 static int camperiphscsistatuserror(union ccb *ccb, 70 cam_flags camflags, 71 u_int32_t sense_flags, 72 union ccb *save_ccb, 73 int *openings, 74 u_int32_t *relsim_flags, 75 u_int32_t *timeout); 76 static int camperiphscsisenseerror(union ccb *ccb, 77 cam_flags camflags, 78 u_int32_t sense_flags, 79 union ccb *save_ccb, 80 int *openings, 81 u_int32_t *relsim_flags, 82 u_int32_t *timeout); 83 84 static int nperiph_drivers; 85 struct periph_driver **periph_drivers; 86 87 MALLOC_DEFINE(M_CAMPERIPH, "CAM periph", "CAM peripheral buffers"); 88 89 void 90 periphdriver_register(void *data) 91 { 92 struct periph_driver **newdrivers, **old; 93 int ndrivers; 94 95 ndrivers = nperiph_drivers + 2; 96 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK); 97 if (periph_drivers) 98 bcopy(periph_drivers, newdrivers, 99 sizeof(*newdrivers) * nperiph_drivers); 100 newdrivers[nperiph_drivers] = (struct periph_driver *)data; 101 newdrivers[nperiph_drivers + 1] = NULL; 102 old = periph_drivers; 103 periph_drivers = newdrivers; 104 if (old) 105 free(old, M_TEMP); 106 nperiph_drivers++; 107 } 108 109 cam_status 110 cam_periph_alloc(periph_ctor_t *periph_ctor, 111 periph_oninv_t *periph_oninvalidate, 112 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 113 char *name, cam_periph_type type, struct cam_path *path, 114 ac_callback_t *ac_callback, ac_code code, void *arg) 115 { 116 struct periph_driver **p_drv; 117 struct cam_periph *periph; 118 struct cam_periph *cur_periph; 119 path_id_t path_id; 120 target_id_t target_id; 121 lun_id_t lun_id; 122 cam_status status; 123 u_int init_level; 124 int s; 125 126 init_level = 0; 127 /* 128 * Handle Hot-Plug scenarios. If there is already a peripheral 129 * of our type assigned to this path, we are likely waiting for 130 * final close on an old, invalidated, peripheral. If this is 131 * the case, queue up a deferred call to the peripheral's async 132 * handler. If it looks like a mistaken re-allocation, complain. 133 */ 134 if ((periph = cam_periph_find(path, name)) != NULL) { 135 136 if ((periph->flags & CAM_PERIPH_INVALID) != 0 137 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 138 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 139 periph->deferred_callback = ac_callback; 140 periph->deferred_ac = code; 141 return (CAM_REQ_INPROG); 142 } else { 143 printf("cam_periph_alloc: attempt to re-allocate " 144 "valid device %s%d rejected\n", 145 periph->periph_name, periph->unit_number); 146 } 147 return (CAM_REQ_INVALID); 148 } 149 150 periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH, 151 M_NOWAIT); 152 153 if (periph == NULL) 154 return (CAM_RESRC_UNAVAIL); 155 156 init_level++; 157 158 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 159 if (strcmp((*p_drv)->driver_name, name) == 0) 160 break; 161 } 162 163 path_id = xpt_path_path_id(path); 164 target_id = xpt_path_target_id(path); 165 lun_id = xpt_path_lun_id(path); 166 bzero(periph, sizeof(*periph)); 167 cam_init_pinfo(&periph->pinfo); 168 periph->periph_start = periph_start; 169 periph->periph_dtor = periph_dtor; 170 periph->periph_oninval = periph_oninvalidate; 171 periph->type = type; 172 periph->periph_name = name; 173 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 174 periph->immediate_priority = CAM_PRIORITY_NONE; 175 periph->refcount = 0; 176 SLIST_INIT(&periph->ccb_list); 177 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 178 if (status != CAM_REQ_CMP) 179 goto failure; 180 181 periph->path = path; 182 init_level++; 183 184 status = xpt_add_periph(periph); 185 186 if (status != CAM_REQ_CMP) 187 goto failure; 188 189 s = splsoftcam(); 190 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 191 while (cur_periph != NULL 192 && cur_periph->unit_number < periph->unit_number) 193 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 194 195 if (cur_periph != NULL) 196 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 197 else { 198 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 199 (*p_drv)->generation++; 200 } 201 202 splx(s); 203 204 init_level++; 205 206 status = periph_ctor(periph, arg); 207 208 if (status == CAM_REQ_CMP) 209 init_level++; 210 211 failure: 212 switch (init_level) { 213 case 4: 214 /* Initialized successfully */ 215 break; 216 case 3: 217 s = splsoftcam(); 218 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 219 splx(s); 220 xpt_remove_periph(periph); 221 /* FALLTHROUGH */ 222 case 2: 223 xpt_free_path(periph->path); 224 /* FALLTHROUGH */ 225 case 1: 226 free(periph, M_CAMPERIPH); 227 /* FALLTHROUGH */ 228 case 0: 229 /* No cleanup to perform. */ 230 break; 231 default: 232 panic("cam_periph_alloc: Unkown init level"); 233 } 234 return(status); 235 } 236 237 /* 238 * Find a peripheral structure with the specified path, target, lun, 239 * and (optionally) type. If the name is NULL, this function will return 240 * the first peripheral driver that matches the specified path. 241 */ 242 struct cam_periph * 243 cam_periph_find(struct cam_path *path, char *name) 244 { 245 struct periph_driver **p_drv; 246 struct cam_periph *periph; 247 int s; 248 249 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 250 251 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 252 continue; 253 254 s = splsoftcam(); 255 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 256 if (xpt_path_comp(periph->path, path) == 0) { 257 splx(s); 258 return(periph); 259 } 260 } 261 splx(s); 262 if (name != NULL) 263 return(NULL); 264 } 265 return(NULL); 266 } 267 268 cam_status 269 cam_periph_acquire(struct cam_periph *periph) 270 { 271 int s; 272 273 if (periph == NULL) 274 return(CAM_REQ_CMP_ERR); 275 276 s = splsoftcam(); 277 periph->refcount++; 278 splx(s); 279 280 return(CAM_REQ_CMP); 281 } 282 283 void 284 cam_periph_release(struct cam_periph *periph) 285 { 286 int s; 287 288 if (periph == NULL) 289 return; 290 291 s = splsoftcam(); 292 if ((--periph->refcount == 0) 293 && (periph->flags & CAM_PERIPH_INVALID)) { 294 camperiphfree(periph); 295 } 296 splx(s); 297 298 } 299 300 /* 301 * Look for the next unit number that is not currently in use for this 302 * peripheral type starting at "newunit". Also exclude unit numbers that 303 * are reserved by for future "hardwiring" unless we already know that this 304 * is a potential wired device. Only assume that the device is "wired" the 305 * first time through the loop since after that we'll be looking at unit 306 * numbers that did not match a wiring entry. 307 */ 308 static u_int 309 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired, 310 path_id_t pathid, target_id_t target, lun_id_t lun) 311 { 312 struct cam_periph *periph; 313 char *periph_name; 314 int s; 315 int i, val, dunit, r; 316 const char *dname, *strval; 317 318 s = splsoftcam(); 319 periph_name = p_drv->driver_name; 320 for (;;newunit++) { 321 322 for (periph = TAILQ_FIRST(&p_drv->units); 323 periph != NULL && periph->unit_number != newunit; 324 periph = TAILQ_NEXT(periph, unit_links)) 325 ; 326 327 if (periph != NULL && periph->unit_number == newunit) { 328 if (wired != 0) { 329 xpt_print_path(periph->path); 330 printf("Duplicate Wired Device entry!\n"); 331 xpt_print_path(periph->path); 332 printf("Second device (%s device at scbus%d " 333 "target %d lun %d) will not be wired\n", 334 periph_name, pathid, target, lun); 335 wired = 0; 336 } 337 continue; 338 } 339 if (wired) 340 break; 341 342 /* 343 * Don't match entries like "da 4" as a wired down 344 * device, but do match entries like "da 4 target 5" 345 * or even "da 4 scbus 1". 346 */ 347 i = 0; 348 dname = periph_name; 349 for (;;) { 350 r = resource_find_dev(&i, dname, &dunit, NULL, NULL); 351 if (r != 0) 352 break; 353 /* if no "target" and no specific scbus, skip */ 354 if (resource_int_value(dname, dunit, "target", &val) && 355 (resource_string_value(dname, dunit, "at",&strval)|| 356 strcmp(strval, "scbus") == 0)) 357 continue; 358 if (newunit == dunit) 359 break; 360 } 361 if (r != 0) 362 break; 363 } 364 splx(s); 365 return (newunit); 366 } 367 368 static u_int 369 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 370 target_id_t target, lun_id_t lun) 371 { 372 u_int unit; 373 int wired, i, val, dunit; 374 const char *dname, *strval; 375 char pathbuf[32], *periph_name; 376 377 periph_name = p_drv->driver_name; 378 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid); 379 unit = 0; 380 i = 0; 381 dname = periph_name; 382 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0; 383 wired = 0) { 384 if (resource_string_value(dname, dunit, "at", &strval) == 0) { 385 if (strcmp(strval, pathbuf) != 0) 386 continue; 387 wired++; 388 } 389 if (resource_int_value(dname, dunit, "target", &val) == 0) { 390 if (val != target) 391 continue; 392 wired++; 393 } 394 if (resource_int_value(dname, dunit, "lun", &val) == 0) { 395 if (val != lun) 396 continue; 397 wired++; 398 } 399 if (wired != 0) { 400 unit = dunit; 401 break; 402 } 403 } 404 405 /* 406 * Either start from 0 looking for the next unit or from 407 * the unit number given in the resource config. This way, 408 * if we have wildcard matches, we don't return the same 409 * unit number twice. 410 */ 411 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun); 412 413 return (unit); 414 } 415 416 void 417 cam_periph_invalidate(struct cam_periph *periph) 418 { 419 int s; 420 421 s = splsoftcam(); 422 /* 423 * We only call this routine the first time a peripheral is 424 * invalidated. The oninvalidate() routine is always called at 425 * splsoftcam(). 426 */ 427 if (((periph->flags & CAM_PERIPH_INVALID) == 0) 428 && (periph->periph_oninval != NULL)) 429 periph->periph_oninval(periph); 430 431 periph->flags |= CAM_PERIPH_INVALID; 432 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 433 434 if (periph->refcount == 0) 435 camperiphfree(periph); 436 else if (periph->refcount < 0) 437 printf("cam_invalidate_periph: refcount < 0!!\n"); 438 splx(s); 439 } 440 441 static void 442 camperiphfree(struct cam_periph *periph) 443 { 444 int s; 445 struct periph_driver **p_drv; 446 447 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 448 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 449 break; 450 } 451 if (*p_drv == NULL) { 452 printf("camperiphfree: attempt to free non-existant periph\n"); 453 return; 454 } 455 456 if (periph->periph_dtor != NULL) 457 periph->periph_dtor(periph); 458 459 s = splsoftcam(); 460 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 461 (*p_drv)->generation++; 462 splx(s); 463 464 xpt_remove_periph(periph); 465 466 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 467 union ccb ccb; 468 void *arg; 469 470 switch (periph->deferred_ac) { 471 case AC_FOUND_DEVICE: 472 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 473 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 474 xpt_action(&ccb); 475 arg = &ccb; 476 break; 477 case AC_PATH_REGISTERED: 478 ccb.ccb_h.func_code = XPT_PATH_INQ; 479 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 480 xpt_action(&ccb); 481 arg = &ccb; 482 break; 483 default: 484 arg = NULL; 485 break; 486 } 487 periph->deferred_callback(NULL, periph->deferred_ac, 488 periph->path, arg); 489 } 490 xpt_free_path(periph->path); 491 free(periph, M_CAMPERIPH); 492 } 493 494 /* 495 * Wait interruptibly for an exclusive lock. 496 */ 497 int 498 cam_periph_lock(struct cam_periph *periph, int priority) 499 { 500 int error; 501 502 /* 503 * Increment the reference count on the peripheral 504 * while we wait for our lock attempt to succeed 505 * to ensure the peripheral doesn't disappear out 506 * from under us while we sleep. 507 */ 508 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 509 return(ENXIO); 510 511 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 512 periph->flags |= CAM_PERIPH_LOCK_WANTED; 513 if ((error = tsleep(periph, priority, "caplck", 0)) != 0) { 514 cam_periph_release(periph); 515 return error; 516 } 517 } 518 519 periph->flags |= CAM_PERIPH_LOCKED; 520 return 0; 521 } 522 523 /* 524 * Unlock and wake up any waiters. 525 */ 526 void 527 cam_periph_unlock(struct cam_periph *periph) 528 { 529 periph->flags &= ~CAM_PERIPH_LOCKED; 530 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 531 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 532 wakeup(periph); 533 } 534 535 cam_periph_release(periph); 536 } 537 538 /* 539 * Map user virtual pointers into kernel virtual address space, so we can 540 * access the memory. This won't work on physical pointers, for now it's 541 * up to the caller to check for that. (XXX KDM -- should we do that here 542 * instead?) This also only works for up to MAXPHYS memory. Since we use 543 * buffers to map stuff in and out, we're limited to the buffer size. 544 */ 545 int 546 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 547 { 548 int numbufs, i, j; 549 int flags[CAM_PERIPH_MAXMAPS]; 550 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 551 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 552 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 553 554 switch(ccb->ccb_h.func_code) { 555 case XPT_DEV_MATCH: 556 if (ccb->cdm.match_buf_len == 0) { 557 printf("cam_periph_mapmem: invalid match buffer " 558 "length 0\n"); 559 return(EINVAL); 560 } 561 if (ccb->cdm.pattern_buf_len > 0) { 562 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 563 lengths[0] = ccb->cdm.pattern_buf_len; 564 dirs[0] = CAM_DIR_OUT; 565 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 566 lengths[1] = ccb->cdm.match_buf_len; 567 dirs[1] = CAM_DIR_IN; 568 numbufs = 2; 569 } else { 570 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 571 lengths[0] = ccb->cdm.match_buf_len; 572 dirs[0] = CAM_DIR_IN; 573 numbufs = 1; 574 } 575 break; 576 case XPT_SCSI_IO: 577 case XPT_CONT_TARGET_IO: 578 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 579 return(0); 580 581 data_ptrs[0] = &ccb->csio.data_ptr; 582 lengths[0] = ccb->csio.dxfer_len; 583 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 584 numbufs = 1; 585 break; 586 default: 587 return(EINVAL); 588 break; /* NOTREACHED */ 589 } 590 591 /* 592 * Check the transfer length and permissions first, so we don't 593 * have to unmap any previously mapped buffers. 594 */ 595 for (i = 0; i < numbufs; i++) { 596 597 flags[i] = 0; 598 599 /* 600 * The userland data pointer passed in may not be page 601 * aligned. vmapbuf() truncates the address to a page 602 * boundary, so if the address isn't page aligned, we'll 603 * need enough space for the given transfer length, plus 604 * whatever extra space is necessary to make it to the page 605 * boundary. 606 */ 607 if ((lengths[i] + 608 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){ 609 printf("cam_periph_mapmem: attempt to map %lu bytes, " 610 "which is greater than DFLTPHYS(%d)\n", 611 (long)(lengths[i] + 612 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 613 DFLTPHYS); 614 return(E2BIG); 615 } 616 617 if (dirs[i] & CAM_DIR_OUT) { 618 flags[i] = BIO_WRITE; 619 } 620 621 if (dirs[i] & CAM_DIR_IN) { 622 flags[i] = BIO_READ; 623 } 624 625 } 626 627 /* this keeps the current process from getting swapped */ 628 /* 629 * XXX KDM should I use P_NOSWAP instead? 630 */ 631 PHOLD(curproc); 632 633 for (i = 0; i < numbufs; i++) { 634 /* 635 * Get the buffer. 636 */ 637 mapinfo->bp[i] = getpbuf(NULL); 638 639 /* save the buffer's data address */ 640 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data; 641 642 /* put our pointer in the data slot */ 643 mapinfo->bp[i]->b_data = *data_ptrs[i]; 644 645 /* set the transfer length, we know it's < DFLTPHYS */ 646 mapinfo->bp[i]->b_bufsize = lengths[i]; 647 648 /* set the direction */ 649 mapinfo->bp[i]->b_iocmd = flags[i]; 650 651 /* 652 * Map the buffer into kernel memory. 653 * 654 * Note that useracc() alone is not a sufficient test. 655 * vmapbuf() can still fail due to a smaller file mapped 656 * into a larger area of VM, or if userland races against 657 * vmapbuf() after the useracc() check. 658 */ 659 if (vmapbuf(mapinfo->bp[i]) < 0) { 660 for (j = 0; j < i; ++j) { 661 *data_ptrs[j] = mapinfo->bp[j]->b_saveaddr; 662 vunmapbuf(mapinfo->bp[j]); 663 relpbuf(mapinfo->bp[j], NULL); 664 } 665 relpbuf(mapinfo->bp[i], NULL); 666 PRELE(curproc); 667 return(EACCES); 668 } 669 670 /* set our pointer to the new mapped area */ 671 *data_ptrs[i] = mapinfo->bp[i]->b_data; 672 673 mapinfo->num_bufs_used++; 674 } 675 676 return(0); 677 } 678 679 /* 680 * Unmap memory segments mapped into kernel virtual address space by 681 * cam_periph_mapmem(). 682 */ 683 void 684 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 685 { 686 int numbufs, i; 687 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 688 689 if (mapinfo->num_bufs_used <= 0) { 690 /* allow ourselves to be swapped once again */ 691 PRELE(curproc); 692 return; 693 } 694 695 switch (ccb->ccb_h.func_code) { 696 case XPT_DEV_MATCH: 697 numbufs = min(mapinfo->num_bufs_used, 2); 698 699 if (numbufs == 1) { 700 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 701 } else { 702 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 703 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 704 } 705 break; 706 case XPT_SCSI_IO: 707 case XPT_CONT_TARGET_IO: 708 data_ptrs[0] = &ccb->csio.data_ptr; 709 numbufs = min(mapinfo->num_bufs_used, 1); 710 break; 711 default: 712 /* allow ourselves to be swapped once again */ 713 PRELE(curproc); 714 return; 715 break; /* NOTREACHED */ 716 } 717 718 for (i = 0; i < numbufs; i++) { 719 /* Set the user's pointer back to the original value */ 720 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr; 721 722 /* unmap the buffer */ 723 vunmapbuf(mapinfo->bp[i]); 724 725 /* release the buffer */ 726 relpbuf(mapinfo->bp[i], NULL); 727 } 728 729 /* allow ourselves to be swapped once again */ 730 PRELE(curproc); 731 } 732 733 union ccb * 734 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 735 { 736 struct ccb_hdr *ccb_h; 737 int s; 738 739 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n")); 740 741 s = splsoftcam(); 742 743 while (SLIST_FIRST(&periph->ccb_list) == NULL) { 744 if (periph->immediate_priority > priority) 745 periph->immediate_priority = priority; 746 xpt_schedule(periph, priority); 747 if ((SLIST_FIRST(&periph->ccb_list) != NULL) 748 && (SLIST_FIRST(&periph->ccb_list)->pinfo.priority == priority)) 749 break; 750 tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0); 751 } 752 753 ccb_h = SLIST_FIRST(&periph->ccb_list); 754 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 755 splx(s); 756 return ((union ccb *)ccb_h); 757 } 758 759 void 760 cam_periph_ccbwait(union ccb *ccb) 761 { 762 int s; 763 764 s = splsoftcam(); 765 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX) 766 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)) 767 tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0); 768 769 splx(s); 770 } 771 772 int 773 cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr, 774 int (*error_routine)(union ccb *ccb, 775 cam_flags camflags, 776 u_int32_t sense_flags)) 777 { 778 union ccb *ccb; 779 int error; 780 int found; 781 782 error = found = 0; 783 784 switch(cmd){ 785 case CAMGETPASSTHRU: 786 ccb = cam_periph_getccb(periph, /* priority */ 1); 787 xpt_setup_ccb(&ccb->ccb_h, 788 ccb->ccb_h.path, 789 /*priority*/1); 790 ccb->ccb_h.func_code = XPT_GDEVLIST; 791 792 /* 793 * Basically, the point of this is that we go through 794 * getting the list of devices, until we find a passthrough 795 * device. In the current version of the CAM code, the 796 * only way to determine what type of device we're dealing 797 * with is by its name. 798 */ 799 while (found == 0) { 800 ccb->cgdl.index = 0; 801 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 802 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 803 804 /* we want the next device in the list */ 805 xpt_action(ccb); 806 if (strncmp(ccb->cgdl.periph_name, 807 "pass", 4) == 0){ 808 found = 1; 809 break; 810 } 811 } 812 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 813 (found == 0)) { 814 ccb->cgdl.periph_name[0] = '\0'; 815 ccb->cgdl.unit_number = 0; 816 break; 817 } 818 } 819 820 /* copy the result back out */ 821 bcopy(ccb, addr, sizeof(union ccb)); 822 823 /* and release the ccb */ 824 xpt_release_ccb(ccb); 825 826 break; 827 default: 828 error = ENOTTY; 829 break; 830 } 831 return(error); 832 } 833 834 int 835 cam_periph_runccb(union ccb *ccb, 836 int (*error_routine)(union ccb *ccb, 837 cam_flags camflags, 838 u_int32_t sense_flags), 839 cam_flags camflags, u_int32_t sense_flags, 840 struct devstat *ds) 841 { 842 int error; 843 844 error = 0; 845 846 /* 847 * If the user has supplied a stats structure, and if we understand 848 * this particular type of ccb, record the transaction start. 849 */ 850 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 851 devstat_start_transaction(ds, NULL); 852 853 xpt_action(ccb); 854 855 do { 856 cam_periph_ccbwait(ccb); 857 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 858 error = 0; 859 else if (error_routine != NULL) 860 error = (*error_routine)(ccb, camflags, sense_flags); 861 else 862 error = 0; 863 864 } while (error == ERESTART); 865 866 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 867 cam_release_devq(ccb->ccb_h.path, 868 /* relsim_flags */0, 869 /* openings */0, 870 /* timeout */0, 871 /* getcount_only */ FALSE); 872 873 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 874 devstat_end_transaction(ds, 875 ccb->csio.dxfer_len, 876 ccb->csio.tag_action & 0xf, 877 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 878 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 879 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 880 DEVSTAT_WRITE : 881 DEVSTAT_READ, NULL, NULL); 882 883 return(error); 884 } 885 886 void 887 cam_freeze_devq(struct cam_path *path) 888 { 889 struct ccb_hdr ccb_h; 890 891 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 892 ccb_h.func_code = XPT_NOOP; 893 ccb_h.flags = CAM_DEV_QFREEZE; 894 xpt_action((union ccb *)&ccb_h); 895 } 896 897 u_int32_t 898 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 899 u_int32_t openings, u_int32_t timeout, 900 int getcount_only) 901 { 902 struct ccb_relsim crs; 903 904 xpt_setup_ccb(&crs.ccb_h, path, 905 /*priority*/1); 906 crs.ccb_h.func_code = XPT_REL_SIMQ; 907 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 908 crs.release_flags = relsim_flags; 909 crs.openings = openings; 910 crs.release_timeout = timeout; 911 xpt_action((union ccb *)&crs); 912 return (crs.qfrozen_cnt); 913 } 914 915 #define saved_ccb_ptr ppriv_ptr0 916 static void 917 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 918 { 919 union ccb *saved_ccb; 920 cam_status status; 921 int frozen; 922 int sense; 923 struct scsi_start_stop_unit *scsi_cmd; 924 u_int32_t relsim_flags, timeout; 925 u_int32_t qfrozen_cnt; 926 int xpt_done_ccb; 927 928 xpt_done_ccb = FALSE; 929 status = done_ccb->ccb_h.status; 930 frozen = (status & CAM_DEV_QFRZN) != 0; 931 sense = (status & CAM_AUTOSNS_VALID) != 0; 932 status &= CAM_STATUS_MASK; 933 934 timeout = 0; 935 relsim_flags = 0; 936 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 937 938 /* 939 * Unfreeze the queue once if it is already frozen.. 940 */ 941 if (frozen != 0) { 942 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 943 /*relsim_flags*/0, 944 /*openings*/0, 945 /*timeout*/0, 946 /*getcount_only*/0); 947 } 948 949 switch (status) { 950 case CAM_REQ_CMP: 951 { 952 /* 953 * If we have successfully taken a device from the not 954 * ready to ready state, re-scan the device and re-get 955 * the inquiry information. Many devices (mostly disks) 956 * don't properly report their inquiry information unless 957 * they are spun up. 958 * 959 * If we manually retrieved sense into a CCB and got 960 * something other than "NO SENSE" send the updated CCB 961 * back to the client via xpt_done() to be processed via 962 * the error recovery code again. 963 */ 964 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) { 965 scsi_cmd = (struct scsi_start_stop_unit *) 966 &done_ccb->csio.cdb_io.cdb_bytes; 967 968 if (scsi_cmd->opcode == START_STOP_UNIT) 969 xpt_async(AC_INQ_CHANGED, 970 done_ccb->ccb_h.path, NULL); 971 if (scsi_cmd->opcode == REQUEST_SENSE) { 972 u_int sense_key; 973 974 sense_key = saved_ccb->csio.sense_data.flags; 975 sense_key &= SSD_KEY; 976 if (sense_key != SSD_KEY_NO_SENSE) { 977 saved_ccb->ccb_h.status |= 978 CAM_AUTOSNS_VALID; 979 #if 0 980 xpt_print_path(saved_ccb->ccb_h.path); 981 printf("Recovered Sense\n"); 982 scsi_sense_print(&saved_ccb->csio); 983 cam_error_print(saved_ccb, CAM_ESF_ALL, 984 CAM_EPF_ALL); 985 #endif 986 xpt_done_ccb = TRUE; 987 } 988 } 989 } 990 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 991 sizeof(union ccb)); 992 993 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 994 995 if (xpt_done_ccb == FALSE) 996 xpt_action(done_ccb); 997 998 break; 999 } 1000 case CAM_SCSI_STATUS_ERROR: 1001 scsi_cmd = (struct scsi_start_stop_unit *) 1002 &done_ccb->csio.cdb_io.cdb_bytes; 1003 if (sense != 0) { 1004 struct ccb_getdev cgd; 1005 struct scsi_sense_data *sense; 1006 int error_code, sense_key, asc, ascq; 1007 scsi_sense_action err_action; 1008 1009 sense = &done_ccb->csio.sense_data; 1010 scsi_extract_sense(sense, &error_code, 1011 &sense_key, &asc, &ascq); 1012 1013 /* 1014 * Grab the inquiry data for this device. 1015 */ 1016 xpt_setup_ccb(&cgd.ccb_h, done_ccb->ccb_h.path, 1017 /*priority*/ 1); 1018 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1019 xpt_action((union ccb *)&cgd); 1020 err_action = scsi_error_action(&done_ccb->csio, 1021 &cgd.inq_data, 0); 1022 1023 /* 1024 * If the error is "invalid field in CDB", 1025 * and the load/eject flag is set, turn the 1026 * flag off and try again. This is just in 1027 * case the drive in question barfs on the 1028 * load eject flag. The CAM code should set 1029 * the load/eject flag by default for 1030 * removable media. 1031 */ 1032 1033 /* XXX KDM 1034 * Should we check to see what the specific 1035 * scsi status is?? Or does it not matter 1036 * since we already know that there was an 1037 * error, and we know what the specific 1038 * error code was, and we know what the 1039 * opcode is.. 1040 */ 1041 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1042 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1043 (asc == 0x24) && (ascq == 0x00) && 1044 (done_ccb->ccb_h.retry_count > 0)) { 1045 1046 scsi_cmd->how &= ~SSS_LOEJ; 1047 1048 xpt_action(done_ccb); 1049 1050 } else if ((done_ccb->ccb_h.retry_count > 1) 1051 && ((err_action & SS_MASK) != SS_FAIL)) { 1052 1053 /* 1054 * In this case, the error recovery 1055 * command failed, but we've got 1056 * some retries left on it. Give 1057 * it another try unless this is an 1058 * unretryable error. 1059 */ 1060 1061 /* set the timeout to .5 sec */ 1062 relsim_flags = 1063 RELSIM_RELEASE_AFTER_TIMEOUT; 1064 timeout = 500; 1065 1066 xpt_action(done_ccb); 1067 1068 break; 1069 1070 } else { 1071 /* 1072 * Perform the final retry with the original 1073 * CCB so that final error processing is 1074 * performed by the owner of the CCB. 1075 */ 1076 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1077 done_ccb, sizeof(union ccb)); 1078 1079 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1080 1081 xpt_action(done_ccb); 1082 } 1083 } else { 1084 /* 1085 * Eh?? The command failed, but we don't 1086 * have any sense. What's up with that? 1087 * Fire the CCB again to return it to the 1088 * caller. 1089 */ 1090 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1091 done_ccb, sizeof(union ccb)); 1092 1093 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1094 1095 xpt_action(done_ccb); 1096 1097 } 1098 break; 1099 default: 1100 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 1101 sizeof(union ccb)); 1102 1103 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1104 1105 xpt_action(done_ccb); 1106 1107 break; 1108 } 1109 1110 /* decrement the retry count */ 1111 /* 1112 * XXX This isn't appropriate in all cases. Restructure, 1113 * so that the retry count is only decremented on an 1114 * actual retry. Remeber that the orignal ccb had its 1115 * retry count dropped before entering recovery, so 1116 * doing it again is a bug. 1117 */ 1118 if (done_ccb->ccb_h.retry_count > 0) 1119 done_ccb->ccb_h.retry_count--; 1120 1121 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 1122 /*relsim_flags*/relsim_flags, 1123 /*openings*/0, 1124 /*timeout*/timeout, 1125 /*getcount_only*/0); 1126 if (xpt_done_ccb == TRUE) 1127 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 1128 } 1129 1130 /* 1131 * Generic Async Event handler. Peripheral drivers usually 1132 * filter out the events that require personal attention, 1133 * and leave the rest to this function. 1134 */ 1135 void 1136 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1137 struct cam_path *path, void *arg) 1138 { 1139 switch (code) { 1140 case AC_LOST_DEVICE: 1141 cam_periph_invalidate(periph); 1142 break; 1143 case AC_SENT_BDR: 1144 case AC_BUS_RESET: 1145 { 1146 cam_periph_bus_settle(periph, scsi_delay); 1147 break; 1148 } 1149 default: 1150 break; 1151 } 1152 } 1153 1154 void 1155 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1156 { 1157 struct ccb_getdevstats cgds; 1158 1159 xpt_setup_ccb(&cgds.ccb_h, periph->path, /*priority*/1); 1160 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1161 xpt_action((union ccb *)&cgds); 1162 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1163 } 1164 1165 void 1166 cam_periph_freeze_after_event(struct cam_periph *periph, 1167 struct timeval* event_time, u_int duration_ms) 1168 { 1169 struct timeval delta; 1170 struct timeval duration_tv; 1171 int s; 1172 1173 s = splclock(); 1174 microtime(&delta); 1175 splx(s); 1176 timevalsub(&delta, event_time); 1177 duration_tv.tv_sec = duration_ms / 1000; 1178 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1179 if (timevalcmp(&delta, &duration_tv, <)) { 1180 timevalsub(&duration_tv, &delta); 1181 1182 duration_ms = duration_tv.tv_sec * 1000; 1183 duration_ms += duration_tv.tv_usec / 1000; 1184 cam_freeze_devq(periph->path); 1185 cam_release_devq(periph->path, 1186 RELSIM_RELEASE_AFTER_TIMEOUT, 1187 /*reduction*/0, 1188 /*timeout*/duration_ms, 1189 /*getcount_only*/0); 1190 } 1191 1192 } 1193 1194 static int 1195 camperiphscsistatuserror(union ccb *ccb, cam_flags camflags, 1196 u_int32_t sense_flags, union ccb *save_ccb, 1197 int *openings, u_int32_t *relsim_flags, 1198 u_int32_t *timeout) 1199 { 1200 int error; 1201 1202 switch (ccb->csio.scsi_status) { 1203 case SCSI_STATUS_OK: 1204 case SCSI_STATUS_COND_MET: 1205 case SCSI_STATUS_INTERMED: 1206 case SCSI_STATUS_INTERMED_COND_MET: 1207 error = 0; 1208 break; 1209 case SCSI_STATUS_CMD_TERMINATED: 1210 case SCSI_STATUS_CHECK_COND: 1211 error = camperiphscsisenseerror(ccb, 1212 camflags, 1213 sense_flags, 1214 save_ccb, 1215 openings, 1216 relsim_flags, 1217 timeout); 1218 break; 1219 case SCSI_STATUS_QUEUE_FULL: 1220 { 1221 /* no decrement */ 1222 struct ccb_getdevstats cgds; 1223 1224 /* 1225 * First off, find out what the current 1226 * transaction counts are. 1227 */ 1228 xpt_setup_ccb(&cgds.ccb_h, 1229 ccb->ccb_h.path, 1230 /*priority*/1); 1231 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1232 xpt_action((union ccb *)&cgds); 1233 1234 /* 1235 * If we were the only transaction active, treat 1236 * the QUEUE FULL as if it were a BUSY condition. 1237 */ 1238 if (cgds.dev_active != 0) { 1239 int total_openings; 1240 1241 /* 1242 * Reduce the number of openings to 1243 * be 1 less than the amount it took 1244 * to get a queue full bounded by the 1245 * minimum allowed tag count for this 1246 * device. 1247 */ 1248 total_openings = cgds.dev_active + cgds.dev_openings; 1249 *openings = cgds.dev_active; 1250 if (*openings < cgds.mintags) 1251 *openings = cgds.mintags; 1252 if (*openings < total_openings) 1253 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1254 else { 1255 /* 1256 * Some devices report queue full for 1257 * temporary resource shortages. For 1258 * this reason, we allow a minimum 1259 * tag count to be entered via a 1260 * quirk entry to prevent the queue 1261 * count on these devices from falling 1262 * to a pessimisticly low value. We 1263 * still wait for the next successful 1264 * completion, however, before queueing 1265 * more transactions to the device. 1266 */ 1267 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1268 } 1269 *timeout = 0; 1270 error = ERESTART; 1271 if (bootverbose) { 1272 xpt_print_path(ccb->ccb_h.path); 1273 printf("Queue Full\n"); 1274 } 1275 break; 1276 } 1277 /* FALLTHROUGH */ 1278 } 1279 case SCSI_STATUS_BUSY: 1280 /* 1281 * Restart the queue after either another 1282 * command completes or a 1 second timeout. 1283 */ 1284 if (bootverbose) { 1285 xpt_print_path(ccb->ccb_h.path); 1286 printf("Device Busy\n"); 1287 } 1288 if (ccb->ccb_h.retry_count > 0) { 1289 ccb->ccb_h.retry_count--; 1290 error = ERESTART; 1291 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1292 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1293 *timeout = 1000; 1294 } else { 1295 error = EIO; 1296 } 1297 break; 1298 case SCSI_STATUS_RESERV_CONFLICT: 1299 xpt_print_path(ccb->ccb_h.path); 1300 printf("Reservation Conflict\n"); 1301 error = EIO; 1302 break; 1303 default: 1304 xpt_print_path(ccb->ccb_h.path); 1305 printf("SCSI Status 0x%x\n", ccb->csio.scsi_status); 1306 error = EIO; 1307 break; 1308 } 1309 return (error); 1310 } 1311 1312 static int 1313 camperiphscsisenseerror(union ccb *ccb, cam_flags camflags, 1314 u_int32_t sense_flags, union ccb *save_ccb, 1315 int *openings, u_int32_t *relsim_flags, 1316 u_int32_t *timeout) 1317 { 1318 struct cam_periph *periph; 1319 int error; 1320 1321 periph = xpt_path_periph(ccb->ccb_h.path); 1322 if (periph->flags & CAM_PERIPH_RECOVERY_INPROG) { 1323 1324 /* 1325 * If error recovery is already in progress, don't attempt 1326 * to process this error, but requeue it unconditionally 1327 * and attempt to process it once error recovery has 1328 * completed. This failed command is probably related to 1329 * the error that caused the currently active error recovery 1330 * action so our current recovery efforts should also 1331 * address this command. Be aware that the error recovery 1332 * code assumes that only one recovery action is in progress 1333 * on a particular peripheral instance at any given time 1334 * (e.g. only one saved CCB for error recovery) so it is 1335 * imperitive that we don't violate this assumption. 1336 */ 1337 error = ERESTART; 1338 } else { 1339 scsi_sense_action err_action; 1340 struct ccb_getdev cgd; 1341 const char *action_string; 1342 union ccb* print_ccb; 1343 1344 /* A description of the error recovery action performed */ 1345 action_string = NULL; 1346 1347 /* 1348 * The location of the orignal ccb 1349 * for sense printing purposes. 1350 */ 1351 print_ccb = ccb; 1352 1353 /* 1354 * Grab the inquiry data for this device. 1355 */ 1356 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, /*priority*/ 1); 1357 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1358 xpt_action((union ccb *)&cgd); 1359 1360 if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) 1361 err_action = scsi_error_action(&ccb->csio, 1362 &cgd.inq_data, 1363 sense_flags); 1364 else if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) 1365 err_action = SS_REQSENSE; 1366 else 1367 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1368 1369 error = err_action & SS_ERRMASK; 1370 1371 /* 1372 * If the recovery action will consume a retry, 1373 * make sure we actually have retries available. 1374 */ 1375 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1376 if (ccb->ccb_h.retry_count > 0) 1377 ccb->ccb_h.retry_count--; 1378 else { 1379 action_string = "Retries Exhausted"; 1380 goto sense_error_done; 1381 } 1382 } 1383 1384 if ((err_action & SS_MASK) >= SS_START) { 1385 /* 1386 * Do common portions of commands that 1387 * use recovery CCBs. 1388 */ 1389 if (save_ccb == NULL) { 1390 action_string = "No recovery CCB supplied"; 1391 goto sense_error_done; 1392 } 1393 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1394 print_ccb = save_ccb; 1395 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1396 } 1397 1398 switch (err_action & SS_MASK) { 1399 case SS_NOP: 1400 action_string = "No Recovery Action Needed"; 1401 error = 0; 1402 break; 1403 case SS_RETRY: 1404 action_string = "Retrying Command (per Sense Data)"; 1405 error = ERESTART; 1406 break; 1407 case SS_FAIL: 1408 action_string = "Unretryable error"; 1409 break; 1410 case SS_START: 1411 { 1412 int le; 1413 1414 /* 1415 * Send a start unit command to the device, and 1416 * then retry the command. 1417 */ 1418 action_string = "Attempting to Start Unit"; 1419 1420 /* 1421 * Check for removable media and set 1422 * load/eject flag appropriately. 1423 */ 1424 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1425 le = TRUE; 1426 else 1427 le = FALSE; 1428 1429 scsi_start_stop(&ccb->csio, 1430 /*retries*/1, 1431 camperiphdone, 1432 MSG_SIMPLE_Q_TAG, 1433 /*start*/TRUE, 1434 /*load/eject*/le, 1435 /*immediate*/FALSE, 1436 SSD_FULL_SIZE, 1437 /*timeout*/50000); 1438 break; 1439 } 1440 case SS_TUR: 1441 { 1442 /* 1443 * Send a Test Unit Ready to the device. 1444 * If the 'many' flag is set, we send 120 1445 * test unit ready commands, one every half 1446 * second. Otherwise, we just send one TUR. 1447 * We only want to do this if the retry 1448 * count has not been exhausted. 1449 */ 1450 int retries; 1451 1452 if ((err_action & SSQ_MANY) != 0) { 1453 action_string = "Polling device for readiness"; 1454 retries = 120; 1455 } else { 1456 action_string = "Testing device for readiness"; 1457 retries = 1; 1458 } 1459 scsi_test_unit_ready(&ccb->csio, 1460 retries, 1461 camperiphdone, 1462 MSG_SIMPLE_Q_TAG, 1463 SSD_FULL_SIZE, 1464 /*timeout*/5000); 1465 1466 /* 1467 * Accomplish our 500ms delay by deferring 1468 * the release of our device queue appropriately. 1469 */ 1470 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1471 *timeout = 500; 1472 break; 1473 } 1474 case SS_REQSENSE: 1475 { 1476 /* 1477 * Send a Request Sense to the device. We 1478 * assume that we are in a contingent allegiance 1479 * condition so we do not tag this request. 1480 */ 1481 scsi_request_sense(&ccb->csio, /*retries*/1, 1482 camperiphdone, 1483 &save_ccb->csio.sense_data, 1484 sizeof(save_ccb->csio.sense_data), 1485 CAM_TAG_ACTION_NONE, 1486 /*sense_len*/SSD_FULL_SIZE, 1487 /*timeout*/5000); 1488 break; 1489 } 1490 default: 1491 panic("Unhandled error action %x", err_action); 1492 } 1493 1494 if ((err_action & SS_MASK) >= SS_START) { 1495 /* 1496 * Drop the priority to 0 so that the recovery 1497 * CCB is the first to execute. Freeze the queue 1498 * after this command is sent so that we can 1499 * restore the old csio and have it queued in 1500 * the proper order before we release normal 1501 * transactions to the device. 1502 */ 1503 ccb->ccb_h.pinfo.priority = 0; 1504 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1505 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1506 error = ERESTART; 1507 } 1508 1509 sense_error_done: 1510 if ((err_action & SSQ_PRINT_SENSE) != 0 1511 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) { 1512 cam_error_print(print_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1513 xpt_print_path(ccb->ccb_h.path); 1514 if (bootverbose) 1515 scsi_sense_print(&print_ccb->csio); 1516 printf("%s\n", action_string); 1517 } 1518 } 1519 return (error); 1520 } 1521 1522 /* 1523 * Generic error handler. Peripheral drivers usually filter 1524 * out the errors that they handle in a unique mannor, then 1525 * call this function. 1526 */ 1527 int 1528 cam_periph_error(union ccb *ccb, cam_flags camflags, 1529 u_int32_t sense_flags, union ccb *save_ccb) 1530 { 1531 const char *action_string; 1532 cam_status status; 1533 int frozen; 1534 int error, printed = 0; 1535 int openings; 1536 u_int32_t relsim_flags; 1537 u_int32_t timeout; 1538 1539 action_string = NULL; 1540 status = ccb->ccb_h.status; 1541 frozen = (status & CAM_DEV_QFRZN) != 0; 1542 status &= CAM_STATUS_MASK; 1543 openings = relsim_flags = 0; 1544 1545 switch (status) { 1546 case CAM_REQ_CMP: 1547 error = 0; 1548 break; 1549 case CAM_SCSI_STATUS_ERROR: 1550 error = camperiphscsistatuserror(ccb, 1551 camflags, 1552 sense_flags, 1553 save_ccb, 1554 &openings, 1555 &relsim_flags, 1556 &timeout); 1557 break; 1558 case CAM_AUTOSENSE_FAIL: 1559 xpt_print_path(ccb->ccb_h.path); 1560 printf("AutoSense Failed\n"); 1561 error = EIO; /* we have to kill the command */ 1562 break; 1563 case CAM_REQ_CMP_ERR: 1564 if (bootverbose && printed == 0) { 1565 xpt_print_path(ccb->ccb_h.path); 1566 printf("Request completed with CAM_REQ_CMP_ERR\n"); 1567 printed++; 1568 } 1569 /* FALLTHROUGH */ 1570 case CAM_CMD_TIMEOUT: 1571 if (bootverbose && printed == 0) { 1572 xpt_print_path(ccb->ccb_h.path); 1573 printf("Command timed out\n"); 1574 printed++; 1575 } 1576 /* FALLTHROUGH */ 1577 case CAM_UNEXP_BUSFREE: 1578 if (bootverbose && printed == 0) { 1579 xpt_print_path(ccb->ccb_h.path); 1580 printf("Unexpected Bus Free\n"); 1581 printed++; 1582 } 1583 /* FALLTHROUGH */ 1584 case CAM_UNCOR_PARITY: 1585 if (bootverbose && printed == 0) { 1586 xpt_print_path(ccb->ccb_h.path); 1587 printf("Uncorrected Parity Error\n"); 1588 printed++; 1589 } 1590 /* FALLTHROUGH */ 1591 case CAM_DATA_RUN_ERR: 1592 if (bootverbose && printed == 0) { 1593 xpt_print_path(ccb->ccb_h.path); 1594 printf("Data Overrun\n"); 1595 printed++; 1596 } 1597 error = EIO; /* we have to kill the command */ 1598 /* decrement the number of retries */ 1599 if (ccb->ccb_h.retry_count > 0) { 1600 ccb->ccb_h.retry_count--; 1601 error = ERESTART; 1602 } else { 1603 action_string = "Retries Exausted"; 1604 error = EIO; 1605 } 1606 break; 1607 case CAM_UA_ABORT: 1608 case CAM_UA_TERMIO: 1609 case CAM_MSG_REJECT_REC: 1610 /* XXX Don't know that these are correct */ 1611 error = EIO; 1612 break; 1613 case CAM_SEL_TIMEOUT: 1614 { 1615 struct cam_path *newpath; 1616 1617 if ((camflags & CAM_RETRY_SELTO) != 0) { 1618 if (ccb->ccb_h.retry_count > 0) { 1619 1620 ccb->ccb_h.retry_count--; 1621 error = ERESTART; 1622 if (bootverbose && printed == 0) { 1623 xpt_print_path(ccb->ccb_h.path); 1624 printf("Selection Timeout\n"); 1625 printed++; 1626 } 1627 1628 /* 1629 * Wait a second to give the device 1630 * time to recover before we try again. 1631 */ 1632 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1633 timeout = 1000; 1634 break; 1635 } 1636 } 1637 error = ENXIO; 1638 /* Should we do more if we can't create the path?? */ 1639 if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path), 1640 xpt_path_path_id(ccb->ccb_h.path), 1641 xpt_path_target_id(ccb->ccb_h.path), 1642 CAM_LUN_WILDCARD) != CAM_REQ_CMP) 1643 break; 1644 1645 /* 1646 * Let peripheral drivers know that this device has gone 1647 * away. 1648 */ 1649 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1650 xpt_free_path(newpath); 1651 break; 1652 } 1653 case CAM_REQ_INVALID: 1654 case CAM_PATH_INVALID: 1655 case CAM_DEV_NOT_THERE: 1656 case CAM_NO_HBA: 1657 case CAM_PROVIDE_FAIL: 1658 case CAM_REQ_TOO_BIG: 1659 case CAM_LUN_INVALID: 1660 case CAM_TID_INVALID: 1661 error = EINVAL; 1662 break; 1663 case CAM_SCSI_BUS_RESET: 1664 case CAM_BDR_SENT: 1665 /* 1666 * Commands that repeatedly timeout and cause these 1667 * kinds of error recovery actions, should return 1668 * CAM_CMD_TIMEOUT, which allows us to safely assume 1669 * that this command was an innocent bystander to 1670 * these events and should be unconditionally 1671 * retried. 1672 */ 1673 if (bootverbose && printed == 0) { 1674 xpt_print_path(ccb->ccb_h.path); 1675 if (status == CAM_BDR_SENT) 1676 printf("Bus Device Reset sent\n"); 1677 else 1678 printf("Bus Reset issued\n"); 1679 printed++; 1680 } 1681 /* FALLTHROUGH */ 1682 case CAM_REQUEUE_REQ: 1683 /* Unconditional requeue */ 1684 error = ERESTART; 1685 if (bootverbose && printed == 0) { 1686 xpt_print_path(ccb->ccb_h.path); 1687 printf("Request Requeued\n"); 1688 printed++; 1689 } 1690 break; 1691 case CAM_RESRC_UNAVAIL: 1692 case CAM_BUSY: 1693 /* timeout??? */ 1694 default: 1695 /* decrement the number of retries */ 1696 if (ccb->ccb_h.retry_count > 0) { 1697 ccb->ccb_h.retry_count--; 1698 error = ERESTART; 1699 if (bootverbose && printed == 0) { 1700 xpt_print_path(ccb->ccb_h.path); 1701 printf("CAM Status 0x%x\n", status); 1702 printed++; 1703 } 1704 } else { 1705 error = EIO; 1706 action_string = "Retries Exhausted"; 1707 } 1708 break; 1709 } 1710 1711 /* Attempt a retry */ 1712 if (error == ERESTART || error == 0) { 1713 if (frozen != 0) 1714 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1715 1716 if (error == ERESTART) { 1717 action_string = "Retrying Command"; 1718 xpt_action(ccb); 1719 } 1720 1721 if (frozen != 0) 1722 cam_release_devq(ccb->ccb_h.path, 1723 relsim_flags, 1724 openings, 1725 timeout, 1726 /*getcount_only*/0); 1727 } 1728 1729 /* 1730 * If we have and error and are booting verbosely, whine 1731 * *unless* this was a non-retryable selection timeout. 1732 */ 1733 if (error != 0 && bootverbose && 1734 !(status == CAM_SEL_TIMEOUT && (camflags & CAM_RETRY_SELTO) == 0)) { 1735 1736 1737 if (action_string == NULL) 1738 action_string = "Unretryable Error"; 1739 if (error != ERESTART) { 1740 xpt_print_path(ccb->ccb_h.path); 1741 printf("error %d\n", error); 1742 } 1743 xpt_print_path(ccb->ccb_h.path); 1744 printf("%s\n", action_string); 1745 } 1746 1747 return (error); 1748 }
Cache object: 38b1048d25649ed70ab6c0d71c95ff4b
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]