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FreeBSD/Linux Kernel Cross Reference
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 * $FreeBSD: releng/5.1/sys/cam/cam_periph.c 113186 2003-04-06 22:21:03Z alc $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/linker_set.h> 37 #include <sys/bio.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/buf.h> 41 #include <sys/proc.h> 42 #include <sys/devicestat.h> 43 #include <sys/bus.h> 44 #include <vm/vm.h> 45 #include <vm/vm_extern.h> 46 47 #include <cam/cam.h> 48 #include <cam/cam_ccb.h> 49 #include <cam/cam_xpt_periph.h> 50 #include <cam/cam_periph.h> 51 #include <cam/cam_debug.h> 52 53 #include <cam/scsi/scsi_all.h> 54 #include <cam/scsi/scsi_message.h> 55 #include <cam/scsi/scsi_pass.h> 56 57 static u_int camperiphnextunit(struct periph_driver *p_drv, 58 u_int newunit, int wired, 59 path_id_t pathid, target_id_t target, 60 lun_id_t lun); 61 static u_int camperiphunit(struct periph_driver *p_drv, 62 path_id_t pathid, target_id_t target, 63 lun_id_t lun); 64 static void camperiphdone(struct cam_periph *periph, 65 union ccb *done_ccb); 66 static void camperiphfree(struct cam_periph *periph); 67 static int camperiphscsistatuserror(union ccb *ccb, 68 cam_flags camflags, 69 u_int32_t sense_flags, 70 union ccb *save_ccb, 71 int *openings, 72 u_int32_t *relsim_flags, 73 u_int32_t *timeout); 74 static int camperiphscsisenseerror(union ccb *ccb, 75 cam_flags camflags, 76 u_int32_t sense_flags, 77 union ccb *save_ccb, 78 int *openings, 79 u_int32_t *relsim_flags, 80 u_int32_t *timeout); 81 82 static int nperiph_drivers; 83 struct periph_driver **periph_drivers; 84 85 void 86 periphdriver_register(void *data) 87 { 88 struct periph_driver **newdrivers, **old; 89 int ndrivers; 90 91 ndrivers = nperiph_drivers + 2; 92 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK); 93 if (periph_drivers) 94 bcopy(periph_drivers, newdrivers, 95 sizeof(*newdrivers) * nperiph_drivers); 96 newdrivers[nperiph_drivers] = (struct periph_driver *)data; 97 newdrivers[nperiph_drivers + 1] = NULL; 98 old = periph_drivers; 99 periph_drivers = newdrivers; 100 if (old) 101 free(old, M_TEMP); 102 nperiph_drivers++; 103 } 104 105 cam_status 106 cam_periph_alloc(periph_ctor_t *periph_ctor, 107 periph_oninv_t *periph_oninvalidate, 108 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 109 char *name, cam_periph_type type, struct cam_path *path, 110 ac_callback_t *ac_callback, ac_code code, void *arg) 111 { 112 struct periph_driver **p_drv; 113 struct cam_periph *periph; 114 struct cam_periph *cur_periph; 115 path_id_t path_id; 116 target_id_t target_id; 117 lun_id_t lun_id; 118 cam_status status; 119 u_int init_level; 120 int s; 121 122 init_level = 0; 123 /* 124 * Handle Hot-Plug scenarios. If there is already a peripheral 125 * of our type assigned to this path, we are likely waiting for 126 * final close on an old, invalidated, peripheral. If this is 127 * the case, queue up a deferred call to the peripheral's async 128 * handler. If it looks like a mistaken re-alloation, complain. 129 */ 130 if ((periph = cam_periph_find(path, name)) != NULL) { 131 132 if ((periph->flags & CAM_PERIPH_INVALID) != 0 133 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 134 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 135 periph->deferred_callback = ac_callback; 136 periph->deferred_ac = code; 137 return (CAM_REQ_INPROG); 138 } else { 139 printf("cam_periph_alloc: attempt to re-allocate " 140 "valid device %s%d rejected\n", 141 periph->periph_name, periph->unit_number); 142 } 143 return (CAM_REQ_INVALID); 144 } 145 146 periph = (struct cam_periph *)malloc(sizeof(*periph), M_DEVBUF, 147 M_NOWAIT); 148 149 if (periph == NULL) 150 return (CAM_RESRC_UNAVAIL); 151 152 init_level++; 153 154 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 155 if (strcmp((*p_drv)->driver_name, name) == 0) 156 break; 157 } 158 159 path_id = xpt_path_path_id(path); 160 target_id = xpt_path_target_id(path); 161 lun_id = xpt_path_lun_id(path); 162 bzero(periph, sizeof(*periph)); 163 cam_init_pinfo(&periph->pinfo); 164 periph->periph_start = periph_start; 165 periph->periph_dtor = periph_dtor; 166 periph->periph_oninval = periph_oninvalidate; 167 periph->type = type; 168 periph->periph_name = name; 169 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 170 periph->immediate_priority = CAM_PRIORITY_NONE; 171 periph->refcount = 0; 172 SLIST_INIT(&periph->ccb_list); 173 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 174 if (status != CAM_REQ_CMP) 175 goto failure; 176 177 periph->path = path; 178 init_level++; 179 180 status = xpt_add_periph(periph); 181 182 if (status != CAM_REQ_CMP) 183 goto failure; 184 185 s = splsoftcam(); 186 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 187 while (cur_periph != NULL 188 && cur_periph->unit_number < periph->unit_number) 189 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 190 191 if (cur_periph != NULL) 192 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 193 else { 194 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 195 (*p_drv)->generation++; 196 } 197 198 splx(s); 199 200 init_level++; 201 202 status = periph_ctor(periph, arg); 203 204 if (status == CAM_REQ_CMP) 205 init_level++; 206 207 failure: 208 switch (init_level) { 209 case 4: 210 /* Initialized successfully */ 211 break; 212 case 3: 213 s = splsoftcam(); 214 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 215 splx(s); 216 xpt_remove_periph(periph); 217 case 2: 218 xpt_free_path(periph->path); 219 case 1: 220 free(periph, M_DEVBUF); 221 case 0: 222 /* No cleanup to perform. */ 223 break; 224 default: 225 panic("cam_periph_alloc: Unkown init level"); 226 } 227 return(status); 228 } 229 230 /* 231 * Find a peripheral structure with the specified path, target, lun, 232 * and (optionally) type. If the name is NULL, this function will return 233 * the first peripheral driver that matches the specified path. 234 */ 235 struct cam_periph * 236 cam_periph_find(struct cam_path *path, char *name) 237 { 238 struct periph_driver **p_drv; 239 struct cam_periph *periph; 240 int s; 241 242 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 243 244 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 245 continue; 246 247 s = splsoftcam(); 248 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 249 if (xpt_path_comp(periph->path, path) == 0) { 250 splx(s); 251 return(periph); 252 } 253 } 254 splx(s); 255 if (name != NULL) 256 return(NULL); 257 } 258 return(NULL); 259 } 260 261 cam_status 262 cam_periph_acquire(struct cam_periph *periph) 263 { 264 int s; 265 266 if (periph == NULL) 267 return(CAM_REQ_CMP_ERR); 268 269 s = splsoftcam(); 270 periph->refcount++; 271 splx(s); 272 273 return(CAM_REQ_CMP); 274 } 275 276 void 277 cam_periph_release(struct cam_periph *periph) 278 { 279 int s; 280 281 if (periph == NULL) 282 return; 283 284 s = splsoftcam(); 285 if ((--periph->refcount == 0) 286 && (periph->flags & CAM_PERIPH_INVALID)) { 287 camperiphfree(periph); 288 } 289 splx(s); 290 291 } 292 293 /* 294 * Look for the next unit number that is not currently in use for this 295 * peripheral type starting at "newunit". Also exclude unit numbers that 296 * are reserved by for future "hardwiring" unless we already know that this 297 * is a potential wired device. Only assume that the device is "wired" the 298 * first time through the loop since after that we'll be looking at unit 299 * numbers that did not match a wiring entry. 300 */ 301 static u_int 302 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired, 303 path_id_t pathid, target_id_t target, lun_id_t lun) 304 { 305 struct cam_periph *periph; 306 char *periph_name; 307 int s; 308 int i, val, dunit, r; 309 const char *dname, *strval; 310 311 s = splsoftcam(); 312 periph_name = p_drv->driver_name; 313 for (;;newunit++) { 314 315 for (periph = TAILQ_FIRST(&p_drv->units); 316 periph != NULL && periph->unit_number != newunit; 317 periph = TAILQ_NEXT(periph, unit_links)) 318 ; 319 320 if (periph != NULL && periph->unit_number == newunit) { 321 if (wired != 0) { 322 xpt_print_path(periph->path); 323 printf("Duplicate Wired Device entry!\n"); 324 xpt_print_path(periph->path); 325 printf("Second device (%s device at scbus%d " 326 "target %d lun %d) will not be wired\n", 327 periph_name, pathid, target, lun); 328 wired = 0; 329 } 330 continue; 331 } 332 if (wired) 333 break; 334 335 /* 336 * Don't match entries like "da 4" as a wired down 337 * device, but do match entries like "da 4 target 5" 338 * or even "da 4 scbus 1". 339 */ 340 i = 0; 341 dname = periph_name; 342 for (;;) { 343 r = resource_find_dev(&i, dname, &dunit, NULL, NULL); 344 if (r != 0) 345 break; 346 /* if no "target" and no specific scbus, skip */ 347 if (resource_int_value(dname, dunit, "target", &val) && 348 (resource_string_value(dname, dunit, "at",&strval)|| 349 strcmp(strval, "scbus") == 0)) 350 continue; 351 if (newunit == dunit) 352 break; 353 } 354 if (r != 0) 355 break; 356 } 357 splx(s); 358 return (newunit); 359 } 360 361 static u_int 362 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 363 target_id_t target, lun_id_t lun) 364 { 365 u_int unit; 366 int wired, i, val, dunit; 367 const char *dname, *strval; 368 char pathbuf[32], *periph_name; 369 370 periph_name = p_drv->driver_name; 371 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid); 372 unit = 0; 373 i = 0; 374 dname = periph_name; 375 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0; 376 wired = 0) { 377 if (resource_string_value(dname, dunit, "at", &strval) == 0) { 378 if (strcmp(strval, pathbuf) != 0) 379 continue; 380 wired++; 381 } 382 if (resource_int_value(dname, dunit, "target", &val) == 0) { 383 if (val != target) 384 continue; 385 wired++; 386 } 387 if (resource_int_value(dname, dunit, "lun", &val) == 0) { 388 if (val != lun) 389 continue; 390 wired++; 391 } 392 if (wired != 0) { 393 unit = dunit; 394 break; 395 } 396 } 397 398 /* 399 * Either start from 0 looking for the next unit or from 400 * the unit number given in the resource config. This way, 401 * if we have wildcard matches, we don't return the same 402 * unit number twice. 403 */ 404 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun); 405 406 return (unit); 407 } 408 409 void 410 cam_periph_invalidate(struct cam_periph *periph) 411 { 412 int s; 413 414 s = splsoftcam(); 415 /* 416 * We only call this routine the first time a peripheral is 417 * invalidated. The oninvalidate() routine is always called at 418 * splsoftcam(). 419 */ 420 if (((periph->flags & CAM_PERIPH_INVALID) == 0) 421 && (periph->periph_oninval != NULL)) 422 periph->periph_oninval(periph); 423 424 periph->flags |= CAM_PERIPH_INVALID; 425 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 426 427 if (periph->refcount == 0) 428 camperiphfree(periph); 429 else if (periph->refcount < 0) 430 printf("cam_invalidate_periph: refcount < 0!!\n"); 431 splx(s); 432 } 433 434 static void 435 camperiphfree(struct cam_periph *periph) 436 { 437 int s; 438 struct periph_driver **p_drv; 439 440 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 441 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 442 break; 443 } 444 445 if (periph->periph_dtor != NULL) 446 periph->periph_dtor(periph); 447 448 s = splsoftcam(); 449 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 450 (*p_drv)->generation++; 451 splx(s); 452 453 xpt_remove_periph(periph); 454 455 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 456 union ccb ccb; 457 void *arg; 458 459 switch (periph->deferred_ac) { 460 case AC_FOUND_DEVICE: 461 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 462 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 463 xpt_action(&ccb); 464 arg = &ccb; 465 break; 466 case AC_PATH_REGISTERED: 467 ccb.ccb_h.func_code = XPT_PATH_INQ; 468 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 469 xpt_action(&ccb); 470 arg = &ccb; 471 break; 472 default: 473 arg = NULL; 474 break; 475 } 476 periph->deferred_callback(NULL, periph->deferred_ac, 477 periph->path, arg); 478 } 479 xpt_free_path(periph->path); 480 free(periph, M_DEVBUF); 481 } 482 483 /* 484 * Wait interruptibly for an exclusive lock. 485 */ 486 int 487 cam_periph_lock(struct cam_periph *periph, int priority) 488 { 489 int error; 490 491 /* 492 * Increment the reference count on the peripheral 493 * while we wait for our lock attempt to succeed 494 * to ensure the peripheral doesn't disappear out 495 * from under us while we sleep. 496 */ 497 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 498 return(ENXIO); 499 500 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 501 periph->flags |= CAM_PERIPH_LOCK_WANTED; 502 if ((error = tsleep(periph, priority, "caplck", 0)) != 0) { 503 cam_periph_release(periph); 504 return error; 505 } 506 } 507 508 periph->flags |= CAM_PERIPH_LOCKED; 509 return 0; 510 } 511 512 /* 513 * Unlock and wake up any waiters. 514 */ 515 void 516 cam_periph_unlock(struct cam_periph *periph) 517 { 518 periph->flags &= ~CAM_PERIPH_LOCKED; 519 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 520 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 521 wakeup(periph); 522 } 523 524 cam_periph_release(periph); 525 } 526 527 /* 528 * Map user virtual pointers into kernel virtual address space, so we can 529 * access the memory. This won't work on physical pointers, for now it's 530 * up to the caller to check for that. (XXX KDM -- should we do that here 531 * instead?) This also only works for up to MAXPHYS memory. Since we use 532 * buffers to map stuff in and out, we're limited to the buffer size. 533 */ 534 int 535 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 536 { 537 int numbufs, i, j; 538 int flags[CAM_PERIPH_MAXMAPS]; 539 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 540 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 541 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 542 543 switch(ccb->ccb_h.func_code) { 544 case XPT_DEV_MATCH: 545 if (ccb->cdm.match_buf_len == 0) { 546 printf("cam_periph_mapmem: invalid match buffer " 547 "length 0\n"); 548 return(EINVAL); 549 } 550 if (ccb->cdm.pattern_buf_len > 0) { 551 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 552 lengths[0] = ccb->cdm.pattern_buf_len; 553 dirs[0] = CAM_DIR_OUT; 554 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 555 lengths[1] = ccb->cdm.match_buf_len; 556 dirs[1] = CAM_DIR_IN; 557 numbufs = 2; 558 } else { 559 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 560 lengths[0] = ccb->cdm.match_buf_len; 561 dirs[0] = CAM_DIR_IN; 562 numbufs = 1; 563 } 564 break; 565 case XPT_SCSI_IO: 566 case XPT_CONT_TARGET_IO: 567 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 568 return(0); 569 570 data_ptrs[0] = &ccb->csio.data_ptr; 571 lengths[0] = ccb->csio.dxfer_len; 572 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 573 numbufs = 1; 574 break; 575 default: 576 return(EINVAL); 577 break; /* NOTREACHED */ 578 } 579 580 /* 581 * Check the transfer length and permissions first, so we don't 582 * have to unmap any previously mapped buffers. 583 */ 584 for (i = 0; i < numbufs; i++) { 585 586 flags[i] = 0; 587 588 /* 589 * The userland data pointer passed in may not be page 590 * aligned. vmapbuf() truncates the address to a page 591 * boundary, so if the address isn't page aligned, we'll 592 * need enough space for the given transfer length, plus 593 * whatever extra space is necessary to make it to the page 594 * boundary. 595 */ 596 if ((lengths[i] + 597 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){ 598 printf("cam_periph_mapmem: attempt to map %lu bytes, " 599 "which is greater than DFLTPHYS(%d)\n", 600 (long)(lengths[i] + 601 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 602 DFLTPHYS); 603 return(E2BIG); 604 } 605 606 if (dirs[i] & CAM_DIR_OUT) { 607 flags[i] = BIO_WRITE; 608 } 609 610 if (dirs[i] & CAM_DIR_IN) { 611 flags[i] = BIO_READ; 612 } 613 614 } 615 616 /* this keeps the current process from getting swapped */ 617 /* 618 * XXX KDM should I use P_NOSWAP instead? 619 */ 620 PHOLD(curproc); 621 622 for (i = 0; i < numbufs; i++) { 623 /* 624 * Get the buffer. 625 */ 626 mapinfo->bp[i] = getpbuf(NULL); 627 628 /* save the buffer's data address */ 629 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data; 630 631 /* put our pointer in the data slot */ 632 mapinfo->bp[i]->b_data = *data_ptrs[i]; 633 634 /* set the transfer length, we know it's < DFLTPHYS */ 635 mapinfo->bp[i]->b_bufsize = lengths[i]; 636 637 /* set the flags */ 638 mapinfo->bp[i]->b_flags = B_PHYS; 639 640 /* set the direction */ 641 mapinfo->bp[i]->b_iocmd = flags[i]; 642 643 /* 644 * Map the buffer into kernel memory. 645 * 646 * Note that useracc() alone is not a sufficient test. 647 * vmapbuf() can still fail due to a smaller file mapped 648 * into a larger area of VM, or if userland races against 649 * vmapbuf() after the useracc() check. 650 */ 651 if (vmapbuf(mapinfo->bp[i]) < 0) { 652 printf("cam_periph_mapmem: error, " 653 "address %p, length %lu isn't " 654 "user accessible any more\n", 655 (void *)*data_ptrs[i], 656 (u_long)lengths[i]); 657 for (j = 0; j < i; ++j) { 658 *data_ptrs[j] = mapinfo->bp[j]->b_saveaddr; 659 mapinfo->bp[j]->b_flags &= ~B_PHYS; 660 relpbuf(mapinfo->bp[j], NULL); 661 } 662 PRELE(curproc); 663 return(EACCES); 664 } 665 666 /* set our pointer to the new mapped area */ 667 *data_ptrs[i] = mapinfo->bp[i]->b_data; 668 669 mapinfo->num_bufs_used++; 670 } 671 672 return(0); 673 } 674 675 /* 676 * Unmap memory segments mapped into kernel virtual address space by 677 * cam_periph_mapmem(). 678 */ 679 void 680 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 681 { 682 int numbufs, i; 683 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 684 685 if (mapinfo->num_bufs_used <= 0) { 686 /* allow ourselves to be swapped once again */ 687 PRELE(curproc); 688 return; 689 } 690 691 switch (ccb->ccb_h.func_code) { 692 case XPT_DEV_MATCH: 693 numbufs = min(mapinfo->num_bufs_used, 2); 694 695 if (numbufs == 1) { 696 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 697 } else { 698 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 699 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 700 } 701 break; 702 case XPT_SCSI_IO: 703 case XPT_CONT_TARGET_IO: 704 data_ptrs[0] = &ccb->csio.data_ptr; 705 numbufs = min(mapinfo->num_bufs_used, 1); 706 break; 707 default: 708 /* allow ourselves to be swapped once again */ 709 PRELE(curproc); 710 return; 711 break; /* NOTREACHED */ 712 } 713 714 for (i = 0; i < numbufs; i++) { 715 /* Set the user's pointer back to the original value */ 716 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr; 717 718 /* unmap the buffer */ 719 vunmapbuf(mapinfo->bp[i]); 720 721 /* clear the flags we set above */ 722 mapinfo->bp[i]->b_flags &= ~B_PHYS; 723 724 /* release the buffer */ 725 relpbuf(mapinfo->bp[i], NULL); 726 } 727 728 /* allow ourselves to be swapped once again */ 729 PRELE(curproc); 730 } 731 732 union ccb * 733 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 734 { 735 struct ccb_hdr *ccb_h; 736 int s; 737 738 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n")); 739 740 s = splsoftcam(); 741 742 while (SLIST_FIRST(&periph->ccb_list) == NULL) { 743 if (periph->immediate_priority > priority) 744 periph->immediate_priority = priority; 745 xpt_schedule(periph, priority); 746 if ((SLIST_FIRST(&periph->ccb_list) != NULL) 747 && (SLIST_FIRST(&periph->ccb_list)->pinfo.priority == priority)) 748 break; 749 tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0); 750 } 751 752 ccb_h = SLIST_FIRST(&periph->ccb_list); 753 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 754 splx(s); 755 return ((union ccb *)ccb_h); 756 } 757 758 void 759 cam_periph_ccbwait(union ccb *ccb) 760 { 761 int s; 762 763 s = splsoftcam(); 764 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX) 765 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)) 766 tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0); 767 768 splx(s); 769 } 770 771 int 772 cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr, 773 int (*error_routine)(union ccb *ccb, 774 cam_flags camflags, 775 u_int32_t sense_flags)) 776 { 777 union ccb *ccb; 778 int error; 779 int found; 780 781 error = found = 0; 782 783 switch(cmd){ 784 case CAMGETPASSTHRU: 785 ccb = cam_periph_getccb(periph, /* priority */ 1); 786 xpt_setup_ccb(&ccb->ccb_h, 787 ccb->ccb_h.path, 788 /*priority*/1); 789 ccb->ccb_h.func_code = XPT_GDEVLIST; 790 791 /* 792 * Basically, the point of this is that we go through 793 * getting the list of devices, until we find a passthrough 794 * device. In the current version of the CAM code, the 795 * only way to determine what type of device we're dealing 796 * with is by its name. 797 */ 798 while (found == 0) { 799 ccb->cgdl.index = 0; 800 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 801 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 802 803 /* we want the next device in the list */ 804 xpt_action(ccb); 805 if (strncmp(ccb->cgdl.periph_name, 806 "pass", 4) == 0){ 807 found = 1; 808 break; 809 } 810 } 811 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 812 (found == 0)) { 813 ccb->cgdl.periph_name[0] = '\0'; 814 ccb->cgdl.unit_number = 0; 815 break; 816 } 817 } 818 819 /* copy the result back out */ 820 bcopy(ccb, addr, sizeof(union ccb)); 821 822 /* and release the ccb */ 823 xpt_release_ccb(ccb); 824 825 break; 826 default: 827 error = ENOTTY; 828 break; 829 } 830 return(error); 831 } 832 833 int 834 cam_periph_runccb(union ccb *ccb, 835 int (*error_routine)(union ccb *ccb, 836 cam_flags camflags, 837 u_int32_t sense_flags), 838 cam_flags camflags, u_int32_t sense_flags, 839 struct devstat *ds) 840 { 841 int error; 842 843 error = 0; 844 845 /* 846 * If the user has supplied a stats structure, and if we understand 847 * this particular type of ccb, record the transaction start. 848 */ 849 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 850 devstat_start_transaction(ds, NULL); 851 852 xpt_action(ccb); 853 854 do { 855 cam_periph_ccbwait(ccb); 856 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 857 error = 0; 858 else if (error_routine != NULL) 859 error = (*error_routine)(ccb, camflags, sense_flags); 860 else 861 error = 0; 862 863 } while (error == ERESTART); 864 865 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 866 cam_release_devq(ccb->ccb_h.path, 867 /* relsim_flags */0, 868 /* openings */0, 869 /* timeout */0, 870 /* getcount_only */ FALSE); 871 872 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 873 devstat_end_transaction(ds, 874 ccb->csio.dxfer_len, 875 ccb->csio.tag_action & 0xf, 876 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 877 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 878 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 879 DEVSTAT_WRITE : 880 DEVSTAT_READ, NULL, NULL); 881 882 return(error); 883 } 884 885 void 886 cam_freeze_devq(struct cam_path *path) 887 { 888 struct ccb_hdr ccb_h; 889 890 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 891 ccb_h.func_code = XPT_NOOP; 892 ccb_h.flags = CAM_DEV_QFREEZE; 893 xpt_action((union ccb *)&ccb_h); 894 } 895 896 u_int32_t 897 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 898 u_int32_t openings, u_int32_t timeout, 899 int getcount_only) 900 { 901 struct ccb_relsim crs; 902 903 xpt_setup_ccb(&crs.ccb_h, path, 904 /*priority*/1); 905 crs.ccb_h.func_code = XPT_REL_SIMQ; 906 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 907 crs.release_flags = relsim_flags; 908 crs.openings = openings; 909 crs.release_timeout = timeout; 910 xpt_action((union ccb *)&crs); 911 return (crs.qfrozen_cnt); 912 } 913 914 #define saved_ccb_ptr ppriv_ptr0 915 static void 916 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 917 { 918 union ccb *saved_ccb; 919 cam_status status; 920 int frozen; 921 int sense; 922 struct scsi_start_stop_unit *scsi_cmd; 923 u_int32_t relsim_flags, timeout; 924 u_int32_t qfrozen_cnt; 925 int xpt_done_ccb; 926 927 xpt_done_ccb = FALSE; 928 status = done_ccb->ccb_h.status; 929 frozen = (status & CAM_DEV_QFRZN) != 0; 930 sense = (status & CAM_AUTOSNS_VALID) != 0; 931 status &= CAM_STATUS_MASK; 932 933 timeout = 0; 934 relsim_flags = 0; 935 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 936 937 /* 938 * Unfreeze the queue once if it is already frozen.. 939 */ 940 if (frozen != 0) { 941 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 942 /*relsim_flags*/0, 943 /*openings*/0, 944 /*timeout*/0, 945 /*getcount_only*/0); 946 } 947 948 switch (status) { 949 case CAM_REQ_CMP: 950 { 951 /* 952 * If we have successfully taken a device from the not 953 * ready to ready state, re-scan the device and re-get 954 * the inquiry information. Many devices (mostly disks) 955 * don't properly report their inquiry information unless 956 * they are spun up. 957 * 958 * If we manually retrieved sense into a CCB and got 959 * something other than "NO SENSE" send the updated CCB 960 * back to the client via xpt_done() to be processed via 961 * the error recovery code again. 962 */ 963 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) { 964 scsi_cmd = (struct scsi_start_stop_unit *) 965 &done_ccb->csio.cdb_io.cdb_bytes; 966 967 if (scsi_cmd->opcode == START_STOP_UNIT) 968 xpt_async(AC_INQ_CHANGED, 969 done_ccb->ccb_h.path, NULL); 970 if (scsi_cmd->opcode == REQUEST_SENSE) { 971 u_int sense_key; 972 973 sense_key = saved_ccb->csio.sense_data.flags; 974 sense_key &= SSD_KEY; 975 if (sense_key != SSD_KEY_NO_SENSE) { 976 saved_ccb->ccb_h.flags |= 977 CAM_AUTOSNS_VALID; 978 xpt_print_path(saved_ccb->ccb_h.path); 979 printf("Recovered Sense\n"); 980 #if 0 981 scsi_sense_print(&saved_ccb->csio); 982 #endif 983 cam_error_print(saved_ccb, CAM_ESF_ALL, 984 CAM_EPF_ALL); 985 xpt_done_ccb = TRUE; 986 } 987 } 988 } 989 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 990 sizeof(union ccb)); 991 992 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 993 994 if (xpt_done_ccb == FALSE) 995 xpt_action(done_ccb); 996 997 break; 998 } 999 case CAM_SCSI_STATUS_ERROR: 1000 scsi_cmd = (struct scsi_start_stop_unit *) 1001 &done_ccb->csio.cdb_io.cdb_bytes; 1002 if (sense != 0) { 1003 struct scsi_sense_data *sense; 1004 int error_code, sense_key, asc, ascq; 1005 1006 sense = &done_ccb->csio.sense_data; 1007 scsi_extract_sense(sense, &error_code, 1008 &sense_key, &asc, &ascq); 1009 1010 /* 1011 * If the error is "invalid field in CDB", 1012 * and the load/eject flag is set, turn the 1013 * flag off and try again. This is just in 1014 * case the drive in question barfs on the 1015 * load eject flag. The CAM code should set 1016 * the load/eject flag by default for 1017 * removable media. 1018 */ 1019 1020 /* XXX KDM 1021 * Should we check to see what the specific 1022 * scsi status is?? Or does it not matter 1023 * since we already know that there was an 1024 * error, and we know what the specific 1025 * error code was, and we know what the 1026 * opcode is.. 1027 */ 1028 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1029 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1030 (asc == 0x24) && (ascq == 0x00) && 1031 (done_ccb->ccb_h.retry_count > 0)) { 1032 1033 scsi_cmd->how &= ~SSS_LOEJ; 1034 1035 xpt_action(done_ccb); 1036 1037 } else if (done_ccb->ccb_h.retry_count > 1) { 1038 /* 1039 * In this case, the error recovery 1040 * command failed, but we've got 1041 * some retries left on it. Give 1042 * it another try. 1043 */ 1044 1045 /* set the timeout to .5 sec */ 1046 relsim_flags = 1047 RELSIM_RELEASE_AFTER_TIMEOUT; 1048 timeout = 500; 1049 1050 xpt_action(done_ccb); 1051 1052 break; 1053 1054 } else { 1055 /* 1056 * Perform the final retry with the original 1057 * CCB so that final error processing is 1058 * performed by the owner of the CCB. 1059 */ 1060 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1061 done_ccb, sizeof(union ccb)); 1062 1063 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1064 1065 xpt_action(done_ccb); 1066 } 1067 } else { 1068 /* 1069 * Eh?? The command failed, but we don't 1070 * have any sense. What's up with that? 1071 * Fire the CCB again to return it to the 1072 * caller. 1073 */ 1074 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1075 done_ccb, sizeof(union ccb)); 1076 1077 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1078 1079 xpt_action(done_ccb); 1080 1081 } 1082 break; 1083 default: 1084 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 1085 sizeof(union ccb)); 1086 1087 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1088 1089 xpt_action(done_ccb); 1090 1091 break; 1092 } 1093 1094 /* decrement the retry count */ 1095 /* 1096 * XXX This isn't appropriate in all cases. Restructure, 1097 * so that the retry count is only decremented on an 1098 * actual retry. Remeber that the orignal ccb had its 1099 * retry count dropped before entering recovery, so 1100 * doing it again is a bug. 1101 */ 1102 if (done_ccb->ccb_h.retry_count > 0) 1103 done_ccb->ccb_h.retry_count--; 1104 1105 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 1106 /*relsim_flags*/relsim_flags, 1107 /*openings*/0, 1108 /*timeout*/timeout, 1109 /*getcount_only*/0); 1110 if (xpt_done_ccb == TRUE) 1111 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 1112 } 1113 1114 /* 1115 * Generic Async Event handler. Peripheral drivers usually 1116 * filter out the events that require personal attention, 1117 * and leave the rest to this function. 1118 */ 1119 void 1120 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1121 struct cam_path *path, void *arg) 1122 { 1123 switch (code) { 1124 case AC_LOST_DEVICE: 1125 cam_periph_invalidate(periph); 1126 break; 1127 case AC_SENT_BDR: 1128 case AC_BUS_RESET: 1129 { 1130 cam_periph_bus_settle(periph, scsi_delay); 1131 break; 1132 } 1133 default: 1134 break; 1135 } 1136 } 1137 1138 void 1139 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1140 { 1141 struct ccb_getdevstats cgds; 1142 1143 xpt_setup_ccb(&cgds.ccb_h, periph->path, /*priority*/1); 1144 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1145 xpt_action((union ccb *)&cgds); 1146 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1147 } 1148 1149 void 1150 cam_periph_freeze_after_event(struct cam_periph *periph, 1151 struct timeval* event_time, u_int duration_ms) 1152 { 1153 struct timeval delta; 1154 struct timeval duration_tv; 1155 int s; 1156 1157 s = splclock(); 1158 microtime(&delta); 1159 splx(s); 1160 timevalsub(&delta, event_time); 1161 duration_tv.tv_sec = duration_ms / 1000; 1162 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1163 if (timevalcmp(&delta, &duration_tv, <)) { 1164 timevalsub(&duration_tv, &delta); 1165 1166 duration_ms = duration_tv.tv_sec * 1000; 1167 duration_ms += duration_tv.tv_usec / 1000; 1168 cam_freeze_devq(periph->path); 1169 cam_release_devq(periph->path, 1170 RELSIM_RELEASE_AFTER_TIMEOUT, 1171 /*reduction*/0, 1172 /*timeout*/duration_ms, 1173 /*getcount_only*/0); 1174 } 1175 1176 } 1177 1178 static int 1179 camperiphscsistatuserror(union ccb *ccb, cam_flags camflags, 1180 u_int32_t sense_flags, union ccb *save_ccb, 1181 int *openings, u_int32_t *relsim_flags, 1182 u_int32_t *timeout) 1183 { 1184 int error; 1185 1186 switch (ccb->csio.scsi_status) { 1187 case SCSI_STATUS_OK: 1188 case SCSI_STATUS_COND_MET: 1189 case SCSI_STATUS_INTERMED: 1190 case SCSI_STATUS_INTERMED_COND_MET: 1191 error = 0; 1192 break; 1193 case SCSI_STATUS_CMD_TERMINATED: 1194 case SCSI_STATUS_CHECK_COND: 1195 error = camperiphscsisenseerror(ccb, 1196 camflags, 1197 sense_flags, 1198 save_ccb, 1199 openings, 1200 relsim_flags, 1201 timeout); 1202 break; 1203 case SCSI_STATUS_QUEUE_FULL: 1204 { 1205 /* no decrement */ 1206 struct ccb_getdevstats cgds; 1207 1208 /* 1209 * First off, find out what the current 1210 * transaction counts are. 1211 */ 1212 xpt_setup_ccb(&cgds.ccb_h, 1213 ccb->ccb_h.path, 1214 /*priority*/1); 1215 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1216 xpt_action((union ccb *)&cgds); 1217 1218 /* 1219 * If we were the only transaction active, treat 1220 * the QUEUE FULL as if it were a BUSY condition. 1221 */ 1222 if (cgds.dev_active != 0) { 1223 int total_openings; 1224 1225 /* 1226 * Reduce the number of openings to 1227 * be 1 less than the amount it took 1228 * to get a queue full bounded by the 1229 * minimum allowed tag count for this 1230 * device. 1231 */ 1232 total_openings = cgds.dev_active + cgds.dev_openings; 1233 *openings = cgds.dev_active; 1234 if (*openings < cgds.mintags) 1235 *openings = cgds.mintags; 1236 if (*openings < total_openings) 1237 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1238 else { 1239 /* 1240 * Some devices report queue full for 1241 * temporary resource shortages. For 1242 * this reason, we allow a minimum 1243 * tag count to be entered via a 1244 * quirk entry to prevent the queue 1245 * count on these devices from falling 1246 * to a pessimisticly low value. We 1247 * still wait for the next successful 1248 * completion, however, before queueing 1249 * more transactions to the device. 1250 */ 1251 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1252 } 1253 *timeout = 0; 1254 error = ERESTART; 1255 if (bootverbose) { 1256 xpt_print_path(ccb->ccb_h.path); 1257 printf("Queue Full\n"); 1258 } 1259 break; 1260 } 1261 /* FALLTHROUGH */ 1262 } 1263 case SCSI_STATUS_BUSY: 1264 /* 1265 * Restart the queue after either another 1266 * command completes or a 1 second timeout. 1267 */ 1268 if (bootverbose) { 1269 xpt_print_path(ccb->ccb_h.path); 1270 printf("Device Busy\n"); 1271 } 1272 if (ccb->ccb_h.retry_count > 0) { 1273 ccb->ccb_h.retry_count--; 1274 error = ERESTART; 1275 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1276 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1277 *timeout = 1000; 1278 } else { 1279 error = EIO; 1280 } 1281 break; 1282 case SCSI_STATUS_RESERV_CONFLICT: 1283 xpt_print_path(ccb->ccb_h.path); 1284 printf("Reservation Conflict\n"); 1285 error = EIO; 1286 break; 1287 default: 1288 xpt_print_path(ccb->ccb_h.path); 1289 printf("SCSI Status 0x%x\n", ccb->csio.scsi_status); 1290 error = EIO; 1291 break; 1292 } 1293 return (error); 1294 } 1295 1296 static int 1297 camperiphscsisenseerror(union ccb *ccb, cam_flags camflags, 1298 u_int32_t sense_flags, union ccb *save_ccb, 1299 int *openings, u_int32_t *relsim_flags, 1300 u_int32_t *timeout) 1301 { 1302 struct cam_periph *periph; 1303 int error; 1304 1305 periph = xpt_path_periph(ccb->ccb_h.path); 1306 if (periph->flags & CAM_PERIPH_RECOVERY_INPROG) { 1307 1308 /* 1309 * If error recovery is already in progress, don't attempt 1310 * to process this error, but requeue it unconditionally 1311 * and attempt to process it once error recovery has 1312 * completed. This failed command is probably related to 1313 * the error that caused the currently active error recovery 1314 * action so our current recovery efforts should also 1315 * address this command. Be aware that the error recovery 1316 * code assumes that only one recovery action is in progress 1317 * on a particular peripheral instance at any given time 1318 * (e.g. only one saved CCB for error recovery) so it is 1319 * imperitive that we don't violate this assumption. 1320 */ 1321 error = ERESTART; 1322 } else { 1323 scsi_sense_action err_action; 1324 struct ccb_getdev cgd; 1325 const char *action_string; 1326 union ccb* print_ccb; 1327 1328 /* A description of the error recovery action performed */ 1329 action_string = NULL; 1330 1331 /* 1332 * The location of the orignal ccb 1333 * for sense printing purposes. 1334 */ 1335 print_ccb = ccb; 1336 1337 /* 1338 * Grab the inquiry data for this device. 1339 */ 1340 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, /*priority*/ 1); 1341 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1342 xpt_action((union ccb *)&cgd); 1343 1344 if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) 1345 err_action = scsi_error_action(&ccb->csio, 1346 &cgd.inq_data, 1347 sense_flags); 1348 else if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) 1349 err_action = SS_REQSENSE; 1350 else 1351 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1352 1353 error = err_action & SS_ERRMASK; 1354 1355 /* 1356 * If the recovery action will consume a retry, 1357 * make sure we actually have retries available. 1358 */ 1359 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1360 if (ccb->ccb_h.retry_count > 0) 1361 ccb->ccb_h.retry_count--; 1362 else { 1363 action_string = "Retries Exhausted"; 1364 goto sense_error_done; 1365 } 1366 } 1367 1368 if ((err_action & SS_MASK) >= SS_START) { 1369 /* 1370 * Do common portions of commands that 1371 * use recovery CCBs. 1372 */ 1373 if (save_ccb == NULL) { 1374 action_string = "No recovery CCB supplied"; 1375 goto sense_error_done; 1376 } 1377 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1378 print_ccb = save_ccb; 1379 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1380 } 1381 1382 switch (err_action & SS_MASK) { 1383 case SS_NOP: 1384 action_string = "No Recovery Action Needed"; 1385 error = 0; 1386 break; 1387 case SS_RETRY: 1388 action_string = "Retrying Command (per Sense Data)"; 1389 error = ERESTART; 1390 break; 1391 case SS_FAIL: 1392 action_string = "Unretryable error"; 1393 break; 1394 case SS_START: 1395 { 1396 int le; 1397 1398 /* 1399 * Send a start unit command to the device, and 1400 * then retry the command. 1401 */ 1402 action_string = "Attempting to Start Unit"; 1403 1404 /* 1405 * Check for removable media and set 1406 * load/eject flag appropriately. 1407 */ 1408 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1409 le = TRUE; 1410 else 1411 le = FALSE; 1412 1413 scsi_start_stop(&ccb->csio, 1414 /*retries*/1, 1415 camperiphdone, 1416 MSG_SIMPLE_Q_TAG, 1417 /*start*/TRUE, 1418 /*load/eject*/le, 1419 /*immediate*/FALSE, 1420 SSD_FULL_SIZE, 1421 /*timeout*/50000); 1422 break; 1423 } 1424 case SS_TUR: 1425 { 1426 /* 1427 * Send a Test Unit Ready to the device. 1428 * If the 'many' flag is set, we send 120 1429 * test unit ready commands, one every half 1430 * second. Otherwise, we just send one TUR. 1431 * We only want to do this if the retry 1432 * count has not been exhausted. 1433 */ 1434 int retries; 1435 1436 if ((err_action & SSQ_MANY) != 0) { 1437 action_string = "Polling device for readiness"; 1438 retries = 120; 1439 } else { 1440 action_string = "Testing device for readiness"; 1441 retries = 1; 1442 } 1443 scsi_test_unit_ready(&ccb->csio, 1444 retries, 1445 camperiphdone, 1446 MSG_SIMPLE_Q_TAG, 1447 SSD_FULL_SIZE, 1448 /*timeout*/5000); 1449 1450 /* 1451 * Accomplish our 500ms delay by deferring 1452 * the release of our device queue appropriately. 1453 */ 1454 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1455 *timeout = 500; 1456 break; 1457 } 1458 case SS_REQSENSE: 1459 { 1460 /* 1461 * Send a Request Sense to the device. We 1462 * assume that we are in a contingent allegiance 1463 * condition so we do not tag this request. 1464 */ 1465 scsi_request_sense(&ccb->csio, /*retries*/1, 1466 camperiphdone, 1467 &save_ccb->csio.sense_data, 1468 sizeof(save_ccb->csio.sense_data), 1469 CAM_TAG_ACTION_NONE, 1470 /*sense_len*/SSD_FULL_SIZE, 1471 /*timeout*/5000); 1472 break; 1473 } 1474 default: 1475 panic("Unhandled error action %x", err_action); 1476 } 1477 1478 if ((err_action & SS_MASK) >= SS_START) { 1479 /* 1480 * Drop the priority to 0 so that the recovery 1481 * CCB is the first to execute. Freeze the queue 1482 * after this command is sent so that we can 1483 * restore the old csio and have it queued in 1484 * the proper order before we release normal 1485 * transactions to the device. 1486 */ 1487 ccb->ccb_h.pinfo.priority = 0; 1488 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1489 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1490 error = ERESTART; 1491 } 1492 1493 sense_error_done: 1494 if ((err_action & SSQ_PRINT_SENSE) != 0 1495 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) { 1496 cam_error_print(print_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1497 xpt_print_path(ccb->ccb_h.path); 1498 if (bootverbose) 1499 scsi_sense_print(&print_ccb->csio); 1500 printf("%s\n", action_string); 1501 } 1502 } 1503 return (error); 1504 } 1505 1506 /* 1507 * Generic error handler. Peripheral drivers usually filter 1508 * out the errors that they handle in a unique mannor, then 1509 * call this function. 1510 */ 1511 int 1512 cam_periph_error(union ccb *ccb, cam_flags camflags, 1513 u_int32_t sense_flags, union ccb *save_ccb) 1514 { 1515 const char *action_string; 1516 cam_status status; 1517 int frozen; 1518 int error, printed = 0; 1519 int openings; 1520 u_int32_t relsim_flags; 1521 u_int32_t timeout; 1522 1523 action_string = NULL; 1524 status = ccb->ccb_h.status; 1525 frozen = (status & CAM_DEV_QFRZN) != 0; 1526 status &= CAM_STATUS_MASK; 1527 openings = relsim_flags = 0; 1528 1529 switch (status) { 1530 case CAM_REQ_CMP: 1531 error = 0; 1532 break; 1533 case CAM_SCSI_STATUS_ERROR: 1534 error = camperiphscsistatuserror(ccb, 1535 camflags, 1536 sense_flags, 1537 save_ccb, 1538 &openings, 1539 &relsim_flags, 1540 &timeout); 1541 break; 1542 case CAM_AUTOSENSE_FAIL: 1543 xpt_print_path(ccb->ccb_h.path); 1544 printf("AutoSense Failed\n"); 1545 error = EIO; /* we have to kill the command */ 1546 break; 1547 case CAM_REQ_CMP_ERR: 1548 if (bootverbose && printed == 0) { 1549 xpt_print_path(ccb->ccb_h.path); 1550 printf("Request completed with CAM_REQ_CMP_ERR\n"); 1551 printed++; 1552 } 1553 case CAM_CMD_TIMEOUT: 1554 if (bootverbose && printed == 0) { 1555 xpt_print_path(ccb->ccb_h.path); 1556 printf("Command timed out\n"); 1557 printed++; 1558 } 1559 case CAM_UNEXP_BUSFREE: 1560 if (bootverbose && printed == 0) { 1561 xpt_print_path(ccb->ccb_h.path); 1562 printf("Unexpected Bus Free\n"); 1563 printed++; 1564 } 1565 case CAM_UNCOR_PARITY: 1566 if (bootverbose && printed == 0) { 1567 xpt_print_path(ccb->ccb_h.path); 1568 printf("Uncorrected Parity Error\n"); 1569 printed++; 1570 } 1571 case CAM_DATA_RUN_ERR: 1572 if (bootverbose && printed == 0) { 1573 xpt_print_path(ccb->ccb_h.path); 1574 printf("Data Overrun\n"); 1575 printed++; 1576 } 1577 error = EIO; /* we have to kill the command */ 1578 /* decrement the number of retries */ 1579 if (ccb->ccb_h.retry_count > 0) { 1580 ccb->ccb_h.retry_count--; 1581 error = ERESTART; 1582 } else { 1583 action_string = "Retries Exausted"; 1584 error = EIO; 1585 } 1586 break; 1587 case CAM_UA_ABORT: 1588 case CAM_UA_TERMIO: 1589 case CAM_MSG_REJECT_REC: 1590 /* XXX Don't know that these are correct */ 1591 error = EIO; 1592 break; 1593 case CAM_SEL_TIMEOUT: 1594 { 1595 struct cam_path *newpath; 1596 1597 if ((camflags & CAM_RETRY_SELTO) != 0) { 1598 if (ccb->ccb_h.retry_count > 0) { 1599 1600 ccb->ccb_h.retry_count--; 1601 error = ERESTART; 1602 if (bootverbose && printed == 0) { 1603 xpt_print_path(ccb->ccb_h.path); 1604 printf("Selection Timeout\n"); 1605 printed++; 1606 } 1607 1608 /* 1609 * Wait a second to give the device 1610 * time to recover before we try again. 1611 */ 1612 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1613 timeout = 1000; 1614 break; 1615 } 1616 } 1617 error = ENXIO; 1618 /* Should we do more if we can't create the path?? */ 1619 if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path), 1620 xpt_path_path_id(ccb->ccb_h.path), 1621 xpt_path_target_id(ccb->ccb_h.path), 1622 CAM_LUN_WILDCARD) != CAM_REQ_CMP) 1623 break; 1624 1625 /* 1626 * Let peripheral drivers know that this device has gone 1627 * away. 1628 */ 1629 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1630 xpt_free_path(newpath); 1631 break; 1632 } 1633 case CAM_REQ_INVALID: 1634 case CAM_PATH_INVALID: 1635 case CAM_DEV_NOT_THERE: 1636 case CAM_NO_HBA: 1637 case CAM_PROVIDE_FAIL: 1638 case CAM_REQ_TOO_BIG: 1639 error = EINVAL; 1640 break; 1641 case CAM_SCSI_BUS_RESET: 1642 case CAM_BDR_SENT: 1643 /* 1644 * Commands that repeatedly timeout and cause these 1645 * kinds of error recovery actions, should return 1646 * CAM_CMD_TIMEOUT, which allows us to safely assume 1647 * that this command was an innocent bystander to 1648 * these events and should be unconditionally 1649 * retried. 1650 */ 1651 if (bootverbose && printed == 0) { 1652 xpt_print_path(ccb->ccb_h.path); 1653 if (status == CAM_BDR_SENT) 1654 printf("Bus Device Reset sent\n"); 1655 else 1656 printf("Bus Reset issued\n"); 1657 printed++; 1658 } 1659 /* FALLTHROUGH */ 1660 case CAM_REQUEUE_REQ: 1661 /* Unconditional requeue */ 1662 error = ERESTART; 1663 if (bootverbose && printed == 0) { 1664 xpt_print_path(ccb->ccb_h.path); 1665 printf("Request Requeued\n"); 1666 printed++; 1667 } 1668 break; 1669 case CAM_RESRC_UNAVAIL: 1670 case CAM_BUSY: 1671 /* timeout??? */ 1672 default: 1673 /* decrement the number of retries */ 1674 if (ccb->ccb_h.retry_count > 0) { 1675 ccb->ccb_h.retry_count--; 1676 error = ERESTART; 1677 if (bootverbose && printed == 0) { 1678 xpt_print_path(ccb->ccb_h.path); 1679 printf("CAM Status 0x%x\n", status); 1680 printed++; 1681 } 1682 } else { 1683 error = EIO; 1684 action_string = "Retries Exhausted"; 1685 } 1686 break; 1687 } 1688 1689 /* Attempt a retry */ 1690 if (error == ERESTART || error == 0) { 1691 if (frozen != 0) 1692 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1693 1694 if (error == ERESTART) { 1695 action_string = "Retrying Command"; 1696 xpt_action(ccb); 1697 } 1698 1699 if (frozen != 0) 1700 cam_release_devq(ccb->ccb_h.path, 1701 relsim_flags, 1702 openings, 1703 timeout, 1704 /*getcount_only*/0); 1705 } 1706 1707 /* 1708 * If we have and error and are booting verbosely, whine 1709 * *unless* this was a non-retryable selection timeout. 1710 */ 1711 if (error != 0 && bootverbose && 1712 !(status == CAM_SEL_TIMEOUT && (camflags & CAM_RETRY_SELTO) == 0)) { 1713 1714 1715 if (action_string == NULL) 1716 action_string = "Unretryable Error"; 1717 if (error != ERESTART) { 1718 xpt_print_path(ccb->ccb_h.path); 1719 printf("error %d\n", error); 1720 } 1721 xpt_print_path(ccb->ccb_h.path); 1722 printf("%s\n", action_string); 1723 } 1724 1725 return (error); 1726 }
Cache object: d1a4ff1688a9dd0f8ed4191d1bb8a95d
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