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sys/cam/cam_periph.c
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1 /*- 2 * Common functions for CAM "type" (peripheral) drivers. 3 * 4 * Copyright (c) 1997, 1998 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999, 2000 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/6.3/sys/cam/cam_periph.c 163183 2006-10-09 21:44:23Z mjacob $"); 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 static int periph_selto_delay = 1000; 90 TUNABLE_INT("kern.cam.periph_selto_delay", &periph_selto_delay); 91 static int periph_noresrc_delay = 500; 92 TUNABLE_INT("kern.cam.periph_noresrc_delay", &periph_noresrc_delay); 93 static int periph_busy_delay = 500; 94 TUNABLE_INT("kern.cam.periph_busy_delay", &periph_busy_delay); 95 96 97 void 98 periphdriver_register(void *data) 99 { 100 struct periph_driver **newdrivers, **old; 101 int ndrivers; 102 103 ndrivers = nperiph_drivers + 2; 104 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK); 105 if (periph_drivers) 106 bcopy(periph_drivers, newdrivers, 107 sizeof(*newdrivers) * nperiph_drivers); 108 newdrivers[nperiph_drivers] = (struct periph_driver *)data; 109 newdrivers[nperiph_drivers + 1] = NULL; 110 old = periph_drivers; 111 periph_drivers = newdrivers; 112 if (old) 113 free(old, M_TEMP); 114 nperiph_drivers++; 115 } 116 117 cam_status 118 cam_periph_alloc(periph_ctor_t *periph_ctor, 119 periph_oninv_t *periph_oninvalidate, 120 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 121 char *name, cam_periph_type type, struct cam_path *path, 122 ac_callback_t *ac_callback, ac_code code, void *arg) 123 { 124 struct periph_driver **p_drv; 125 struct cam_periph *periph; 126 struct cam_periph *cur_periph; 127 path_id_t path_id; 128 target_id_t target_id; 129 lun_id_t lun_id; 130 cam_status status; 131 u_int init_level; 132 int s; 133 134 init_level = 0; 135 /* 136 * Handle Hot-Plug scenarios. If there is already a peripheral 137 * of our type assigned to this path, we are likely waiting for 138 * final close on an old, invalidated, peripheral. If this is 139 * the case, queue up a deferred call to the peripheral's async 140 * handler. If it looks like a mistaken re-allocation, complain. 141 */ 142 if ((periph = cam_periph_find(path, name)) != NULL) { 143 144 if ((periph->flags & CAM_PERIPH_INVALID) != 0 145 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 146 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 147 periph->deferred_callback = ac_callback; 148 periph->deferred_ac = code; 149 return (CAM_REQ_INPROG); 150 } else { 151 printf("cam_periph_alloc: attempt to re-allocate " 152 "valid device %s%d rejected\n", 153 periph->periph_name, periph->unit_number); 154 } 155 return (CAM_REQ_INVALID); 156 } 157 158 periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH, 159 M_NOWAIT); 160 161 if (periph == NULL) 162 return (CAM_RESRC_UNAVAIL); 163 164 init_level++; 165 166 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 167 if (strcmp((*p_drv)->driver_name, name) == 0) 168 break; 169 } 170 171 path_id = xpt_path_path_id(path); 172 target_id = xpt_path_target_id(path); 173 lun_id = xpt_path_lun_id(path); 174 bzero(periph, sizeof(*periph)); 175 cam_init_pinfo(&periph->pinfo); 176 periph->periph_start = periph_start; 177 periph->periph_dtor = periph_dtor; 178 periph->periph_oninval = periph_oninvalidate; 179 periph->type = type; 180 periph->periph_name = name; 181 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 182 periph->immediate_priority = CAM_PRIORITY_NONE; 183 periph->refcount = 0; 184 SLIST_INIT(&periph->ccb_list); 185 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 186 if (status != CAM_REQ_CMP) 187 goto failure; 188 189 periph->path = path; 190 init_level++; 191 192 status = xpt_add_periph(periph); 193 194 if (status != CAM_REQ_CMP) 195 goto failure; 196 197 s = splsoftcam(); 198 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 199 while (cur_periph != NULL 200 && cur_periph->unit_number < periph->unit_number) 201 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 202 203 if (cur_periph != NULL) 204 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 205 else { 206 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 207 (*p_drv)->generation++; 208 } 209 210 splx(s); 211 212 init_level++; 213 214 status = periph_ctor(periph, arg); 215 216 if (status == CAM_REQ_CMP) 217 init_level++; 218 219 failure: 220 switch (init_level) { 221 case 4: 222 /* Initialized successfully */ 223 break; 224 case 3: 225 s = splsoftcam(); 226 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 227 splx(s); 228 xpt_remove_periph(periph); 229 /* FALLTHROUGH */ 230 case 2: 231 xpt_free_path(periph->path); 232 /* FALLTHROUGH */ 233 case 1: 234 free(periph, M_CAMPERIPH); 235 /* FALLTHROUGH */ 236 case 0: 237 /* No cleanup to perform. */ 238 break; 239 default: 240 panic("cam_periph_alloc: Unkown init level"); 241 } 242 return(status); 243 } 244 245 /* 246 * Find a peripheral structure with the specified path, target, lun, 247 * and (optionally) type. If the name is NULL, this function will return 248 * the first peripheral driver that matches the specified path. 249 */ 250 struct cam_periph * 251 cam_periph_find(struct cam_path *path, char *name) 252 { 253 struct periph_driver **p_drv; 254 struct cam_periph *periph; 255 int s; 256 257 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 258 259 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 260 continue; 261 262 s = splsoftcam(); 263 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 264 if (xpt_path_comp(periph->path, path) == 0) { 265 splx(s); 266 return(periph); 267 } 268 } 269 splx(s); 270 if (name != NULL) 271 return(NULL); 272 } 273 return(NULL); 274 } 275 276 cam_status 277 cam_periph_acquire(struct cam_periph *periph) 278 { 279 int s; 280 281 if (periph == NULL) 282 return(CAM_REQ_CMP_ERR); 283 284 s = splsoftcam(); 285 periph->refcount++; 286 splx(s); 287 288 return(CAM_REQ_CMP); 289 } 290 291 void 292 cam_periph_release(struct cam_periph *periph) 293 { 294 int s; 295 296 if (periph == NULL) 297 return; 298 299 s = splsoftcam(); 300 if ((--periph->refcount == 0) 301 && (periph->flags & CAM_PERIPH_INVALID)) { 302 camperiphfree(periph); 303 } 304 splx(s); 305 306 } 307 308 /* 309 * Look for the next unit number that is not currently in use for this 310 * peripheral type starting at "newunit". Also exclude unit numbers that 311 * are reserved by for future "hardwiring" unless we already know that this 312 * is a potential wired device. Only assume that the device is "wired" the 313 * first time through the loop since after that we'll be looking at unit 314 * numbers that did not match a wiring entry. 315 */ 316 static u_int 317 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired, 318 path_id_t pathid, target_id_t target, lun_id_t lun) 319 { 320 struct cam_periph *periph; 321 char *periph_name; 322 int s; 323 int i, val, dunit, r; 324 const char *dname, *strval; 325 326 s = splsoftcam(); 327 periph_name = p_drv->driver_name; 328 for (;;newunit++) { 329 330 for (periph = TAILQ_FIRST(&p_drv->units); 331 periph != NULL && periph->unit_number != newunit; 332 periph = TAILQ_NEXT(periph, unit_links)) 333 ; 334 335 if (periph != NULL && periph->unit_number == newunit) { 336 if (wired != 0) { 337 xpt_print_path(periph->path); 338 printf("Duplicate Wired Device entry!\n"); 339 xpt_print_path(periph->path); 340 printf("Second device (%s device at scbus%d " 341 "target %d lun %d) will not be wired\n", 342 periph_name, pathid, target, lun); 343 wired = 0; 344 } 345 continue; 346 } 347 if (wired) 348 break; 349 350 /* 351 * Don't match entries like "da 4" as a wired down 352 * device, but do match entries like "da 4 target 5" 353 * or even "da 4 scbus 1". 354 */ 355 i = 0; 356 dname = periph_name; 357 for (;;) { 358 r = resource_find_dev(&i, dname, &dunit, NULL, NULL); 359 if (r != 0) 360 break; 361 /* if no "target" and no specific scbus, skip */ 362 if (resource_int_value(dname, dunit, "target", &val) && 363 (resource_string_value(dname, dunit, "at",&strval)|| 364 strcmp(strval, "scbus") == 0)) 365 continue; 366 if (newunit == dunit) 367 break; 368 } 369 if (r != 0) 370 break; 371 } 372 splx(s); 373 return (newunit); 374 } 375 376 static u_int 377 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 378 target_id_t target, lun_id_t lun) 379 { 380 u_int unit; 381 int wired, i, val, dunit; 382 const char *dname, *strval; 383 char pathbuf[32], *periph_name; 384 385 periph_name = p_drv->driver_name; 386 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid); 387 unit = 0; 388 i = 0; 389 dname = periph_name; 390 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0; 391 wired = 0) { 392 if (resource_string_value(dname, dunit, "at", &strval) == 0) { 393 if (strcmp(strval, pathbuf) != 0) 394 continue; 395 wired++; 396 } 397 if (resource_int_value(dname, dunit, "target", &val) == 0) { 398 if (val != target) 399 continue; 400 wired++; 401 } 402 if (resource_int_value(dname, dunit, "lun", &val) == 0) { 403 if (val != lun) 404 continue; 405 wired++; 406 } 407 if (wired != 0) { 408 unit = dunit; 409 break; 410 } 411 } 412 413 /* 414 * Either start from 0 looking for the next unit or from 415 * the unit number given in the resource config. This way, 416 * if we have wildcard matches, we don't return the same 417 * unit number twice. 418 */ 419 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun); 420 421 return (unit); 422 } 423 424 void 425 cam_periph_invalidate(struct cam_periph *periph) 426 { 427 int s; 428 429 s = splsoftcam(); 430 /* 431 * We only call this routine the first time a peripheral is 432 * invalidated. The oninvalidate() routine is always called at 433 * splsoftcam(). 434 */ 435 if (((periph->flags & CAM_PERIPH_INVALID) == 0) 436 && (periph->periph_oninval != NULL)) 437 periph->periph_oninval(periph); 438 439 periph->flags |= CAM_PERIPH_INVALID; 440 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 441 442 if (periph->refcount == 0) 443 camperiphfree(periph); 444 else if (periph->refcount < 0) 445 printf("cam_invalidate_periph: refcount < 0!!\n"); 446 splx(s); 447 } 448 449 static void 450 camperiphfree(struct cam_periph *periph) 451 { 452 int s; 453 struct periph_driver **p_drv; 454 455 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 456 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 457 break; 458 } 459 if (*p_drv == NULL) { 460 printf("camperiphfree: attempt to free non-existant periph\n"); 461 return; 462 } 463 464 if (periph->periph_dtor != NULL) 465 periph->periph_dtor(periph); 466 467 s = splsoftcam(); 468 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 469 (*p_drv)->generation++; 470 splx(s); 471 472 xpt_remove_periph(periph); 473 474 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 475 union ccb ccb; 476 void *arg; 477 478 switch (periph->deferred_ac) { 479 case AC_FOUND_DEVICE: 480 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 481 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 482 xpt_action(&ccb); 483 arg = &ccb; 484 break; 485 case AC_PATH_REGISTERED: 486 ccb.ccb_h.func_code = XPT_PATH_INQ; 487 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 488 xpt_action(&ccb); 489 arg = &ccb; 490 break; 491 default: 492 arg = NULL; 493 break; 494 } 495 periph->deferred_callback(NULL, periph->deferred_ac, 496 periph->path, arg); 497 } 498 xpt_free_path(periph->path); 499 free(periph, M_CAMPERIPH); 500 } 501 502 /* 503 * Wait interruptibly for an exclusive lock. 504 */ 505 int 506 cam_periph_lock(struct cam_periph *periph, int priority) 507 { 508 int error; 509 510 /* 511 * Increment the reference count on the peripheral 512 * while we wait for our lock attempt to succeed 513 * to ensure the peripheral doesn't disappear out 514 * from under us while we sleep. 515 */ 516 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 517 return(ENXIO); 518 519 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 520 periph->flags |= CAM_PERIPH_LOCK_WANTED; 521 if ((error = tsleep(periph, priority, "caplck", 0)) != 0) { 522 cam_periph_release(periph); 523 return error; 524 } 525 } 526 527 periph->flags |= CAM_PERIPH_LOCKED; 528 return 0; 529 } 530 531 /* 532 * Unlock and wake up any waiters. 533 */ 534 void 535 cam_periph_unlock(struct cam_periph *periph) 536 { 537 periph->flags &= ~CAM_PERIPH_LOCKED; 538 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 539 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 540 wakeup(periph); 541 } 542 543 cam_periph_release(periph); 544 } 545 546 /* 547 * Map user virtual pointers into kernel virtual address space, so we can 548 * access the memory. This won't work on physical pointers, for now it's 549 * up to the caller to check for that. (XXX KDM -- should we do that here 550 * instead?) This also only works for up to MAXPHYS memory. Since we use 551 * buffers to map stuff in and out, we're limited to the buffer size. 552 */ 553 int 554 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 555 { 556 int numbufs, i, j; 557 int flags[CAM_PERIPH_MAXMAPS]; 558 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 559 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 560 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 561 562 switch(ccb->ccb_h.func_code) { 563 case XPT_DEV_MATCH: 564 if (ccb->cdm.match_buf_len == 0) { 565 printf("cam_periph_mapmem: invalid match buffer " 566 "length 0\n"); 567 return(EINVAL); 568 } 569 if (ccb->cdm.pattern_buf_len > 0) { 570 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 571 lengths[0] = ccb->cdm.pattern_buf_len; 572 dirs[0] = CAM_DIR_OUT; 573 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 574 lengths[1] = ccb->cdm.match_buf_len; 575 dirs[1] = CAM_DIR_IN; 576 numbufs = 2; 577 } else { 578 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 579 lengths[0] = ccb->cdm.match_buf_len; 580 dirs[0] = CAM_DIR_IN; 581 numbufs = 1; 582 } 583 break; 584 case XPT_SCSI_IO: 585 case XPT_CONT_TARGET_IO: 586 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 587 return(0); 588 589 data_ptrs[0] = &ccb->csio.data_ptr; 590 lengths[0] = ccb->csio.dxfer_len; 591 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 592 numbufs = 1; 593 break; 594 default: 595 return(EINVAL); 596 break; /* NOTREACHED */ 597 } 598 599 /* 600 * Check the transfer length and permissions first, so we don't 601 * have to unmap any previously mapped buffers. 602 */ 603 for (i = 0; i < numbufs; i++) { 604 605 flags[i] = 0; 606 607 /* 608 * The userland data pointer passed in may not be page 609 * aligned. vmapbuf() truncates the address to a page 610 * boundary, so if the address isn't page aligned, we'll 611 * need enough space for the given transfer length, plus 612 * whatever extra space is necessary to make it to the page 613 * boundary. 614 */ 615 if ((lengths[i] + 616 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){ 617 printf("cam_periph_mapmem: attempt to map %lu bytes, " 618 "which is greater than DFLTPHYS(%d)\n", 619 (long)(lengths[i] + 620 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)), 621 DFLTPHYS); 622 return(E2BIG); 623 } 624 625 if (dirs[i] & CAM_DIR_OUT) { 626 flags[i] = BIO_WRITE; 627 } 628 629 if (dirs[i] & CAM_DIR_IN) { 630 flags[i] = BIO_READ; 631 } 632 633 } 634 635 /* this keeps the current process from getting swapped */ 636 /* 637 * XXX KDM should I use P_NOSWAP instead? 638 */ 639 PHOLD(curproc); 640 641 for (i = 0; i < numbufs; i++) { 642 /* 643 * Get the buffer. 644 */ 645 mapinfo->bp[i] = getpbuf(NULL); 646 647 /* save the buffer's data address */ 648 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data; 649 650 /* put our pointer in the data slot */ 651 mapinfo->bp[i]->b_data = *data_ptrs[i]; 652 653 /* set the transfer length, we know it's < DFLTPHYS */ 654 mapinfo->bp[i]->b_bufsize = lengths[i]; 655 656 /* set the direction */ 657 mapinfo->bp[i]->b_iocmd = flags[i]; 658 659 /* 660 * Map the buffer into kernel memory. 661 * 662 * Note that useracc() alone is not a sufficient test. 663 * vmapbuf() can still fail due to a smaller file mapped 664 * into a larger area of VM, or if userland races against 665 * vmapbuf() after the useracc() check. 666 */ 667 if (vmapbuf(mapinfo->bp[i]) < 0) { 668 for (j = 0; j < i; ++j) { 669 *data_ptrs[j] = mapinfo->bp[j]->b_saveaddr; 670 vunmapbuf(mapinfo->bp[j]); 671 relpbuf(mapinfo->bp[j], NULL); 672 } 673 relpbuf(mapinfo->bp[i], NULL); 674 PRELE(curproc); 675 return(EACCES); 676 } 677 678 /* set our pointer to the new mapped area */ 679 *data_ptrs[i] = mapinfo->bp[i]->b_data; 680 681 mapinfo->num_bufs_used++; 682 } 683 684 return(0); 685 } 686 687 /* 688 * Unmap memory segments mapped into kernel virtual address space by 689 * cam_periph_mapmem(). 690 */ 691 void 692 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 693 { 694 int numbufs, i; 695 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 696 697 if (mapinfo->num_bufs_used <= 0) { 698 /* allow ourselves to be swapped once again */ 699 PRELE(curproc); 700 return; 701 } 702 703 switch (ccb->ccb_h.func_code) { 704 case XPT_DEV_MATCH: 705 numbufs = min(mapinfo->num_bufs_used, 2); 706 707 if (numbufs == 1) { 708 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 709 } else { 710 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 711 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 712 } 713 break; 714 case XPT_SCSI_IO: 715 case XPT_CONT_TARGET_IO: 716 data_ptrs[0] = &ccb->csio.data_ptr; 717 numbufs = min(mapinfo->num_bufs_used, 1); 718 break; 719 default: 720 /* allow ourselves to be swapped once again */ 721 PRELE(curproc); 722 return; 723 break; /* NOTREACHED */ 724 } 725 726 for (i = 0; i < numbufs; i++) { 727 /* Set the user's pointer back to the original value */ 728 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr; 729 730 /* unmap the buffer */ 731 vunmapbuf(mapinfo->bp[i]); 732 733 /* release the buffer */ 734 relpbuf(mapinfo->bp[i], NULL); 735 } 736 737 /* allow ourselves to be swapped once again */ 738 PRELE(curproc); 739 } 740 741 union ccb * 742 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 743 { 744 struct ccb_hdr *ccb_h; 745 int s; 746 747 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n")); 748 749 s = splsoftcam(); 750 751 while (SLIST_FIRST(&periph->ccb_list) == NULL) { 752 if (periph->immediate_priority > priority) 753 periph->immediate_priority = priority; 754 xpt_schedule(periph, priority); 755 if ((SLIST_FIRST(&periph->ccb_list) != NULL) 756 && (SLIST_FIRST(&periph->ccb_list)->pinfo.priority == priority)) 757 break; 758 tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0); 759 } 760 761 ccb_h = SLIST_FIRST(&periph->ccb_list); 762 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 763 splx(s); 764 return ((union ccb *)ccb_h); 765 } 766 767 void 768 cam_periph_ccbwait(union ccb *ccb) 769 { 770 int s; 771 772 s = splsoftcam(); 773 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX) 774 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)) 775 tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0); 776 777 splx(s); 778 } 779 780 int 781 cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr, 782 int (*error_routine)(union ccb *ccb, 783 cam_flags camflags, 784 u_int32_t sense_flags)) 785 { 786 union ccb *ccb; 787 int error; 788 int found; 789 790 error = found = 0; 791 792 switch(cmd){ 793 case CAMGETPASSTHRU: 794 ccb = cam_periph_getccb(periph, /* priority */ 1); 795 xpt_setup_ccb(&ccb->ccb_h, 796 ccb->ccb_h.path, 797 /*priority*/1); 798 ccb->ccb_h.func_code = XPT_GDEVLIST; 799 800 /* 801 * Basically, the point of this is that we go through 802 * getting the list of devices, until we find a passthrough 803 * device. In the current version of the CAM code, the 804 * only way to determine what type of device we're dealing 805 * with is by its name. 806 */ 807 while (found == 0) { 808 ccb->cgdl.index = 0; 809 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 810 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 811 812 /* we want the next device in the list */ 813 xpt_action(ccb); 814 if (strncmp(ccb->cgdl.periph_name, 815 "pass", 4) == 0){ 816 found = 1; 817 break; 818 } 819 } 820 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 821 (found == 0)) { 822 ccb->cgdl.periph_name[0] = '\0'; 823 ccb->cgdl.unit_number = 0; 824 break; 825 } 826 } 827 828 /* copy the result back out */ 829 bcopy(ccb, addr, sizeof(union ccb)); 830 831 /* and release the ccb */ 832 xpt_release_ccb(ccb); 833 834 break; 835 default: 836 error = ENOTTY; 837 break; 838 } 839 return(error); 840 } 841 842 int 843 cam_periph_runccb(union ccb *ccb, 844 int (*error_routine)(union ccb *ccb, 845 cam_flags camflags, 846 u_int32_t sense_flags), 847 cam_flags camflags, u_int32_t sense_flags, 848 struct devstat *ds) 849 { 850 int error; 851 852 error = 0; 853 854 /* 855 * If the user has supplied a stats structure, and if we understand 856 * this particular type of ccb, record the transaction start. 857 */ 858 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 859 devstat_start_transaction(ds, NULL); 860 861 xpt_action(ccb); 862 863 do { 864 cam_periph_ccbwait(ccb); 865 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 866 error = 0; 867 else if (error_routine != NULL) 868 error = (*error_routine)(ccb, camflags, sense_flags); 869 else 870 error = 0; 871 872 } while (error == ERESTART); 873 874 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 875 cam_release_devq(ccb->ccb_h.path, 876 /* relsim_flags */0, 877 /* openings */0, 878 /* timeout */0, 879 /* getcount_only */ FALSE); 880 881 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 882 devstat_end_transaction(ds, 883 ccb->csio.dxfer_len, 884 ccb->csio.tag_action & 0xf, 885 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 886 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 887 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 888 DEVSTAT_WRITE : 889 DEVSTAT_READ, NULL, NULL); 890 891 return(error); 892 } 893 894 void 895 cam_freeze_devq(struct cam_path *path) 896 { 897 struct ccb_hdr ccb_h; 898 899 xpt_setup_ccb(&ccb_h, path, /*priority*/1); 900 ccb_h.func_code = XPT_NOOP; 901 ccb_h.flags = CAM_DEV_QFREEZE; 902 xpt_action((union ccb *)&ccb_h); 903 } 904 905 u_int32_t 906 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 907 u_int32_t openings, u_int32_t timeout, 908 int getcount_only) 909 { 910 struct ccb_relsim crs; 911 912 xpt_setup_ccb(&crs.ccb_h, path, 913 /*priority*/1); 914 crs.ccb_h.func_code = XPT_REL_SIMQ; 915 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 916 crs.release_flags = relsim_flags; 917 crs.openings = openings; 918 crs.release_timeout = timeout; 919 xpt_action((union ccb *)&crs); 920 return (crs.qfrozen_cnt); 921 } 922 923 #define saved_ccb_ptr ppriv_ptr0 924 static void 925 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 926 { 927 union ccb *saved_ccb; 928 cam_status status; 929 int frozen; 930 int sense; 931 struct scsi_start_stop_unit *scsi_cmd; 932 u_int32_t relsim_flags, timeout; 933 u_int32_t qfrozen_cnt; 934 int xpt_done_ccb; 935 936 xpt_done_ccb = FALSE; 937 status = done_ccb->ccb_h.status; 938 frozen = (status & CAM_DEV_QFRZN) != 0; 939 sense = (status & CAM_AUTOSNS_VALID) != 0; 940 status &= CAM_STATUS_MASK; 941 942 timeout = 0; 943 relsim_flags = 0; 944 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr; 945 946 /* 947 * Unfreeze the queue once if it is already frozen.. 948 */ 949 if (frozen != 0) { 950 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 951 /*relsim_flags*/0, 952 /*openings*/0, 953 /*timeout*/0, 954 /*getcount_only*/0); 955 } 956 957 switch (status) { 958 case CAM_REQ_CMP: 959 { 960 /* 961 * If we have successfully taken a device from the not 962 * ready to ready state, re-scan the device and re-get 963 * the inquiry information. Many devices (mostly disks) 964 * don't properly report their inquiry information unless 965 * they are spun up. 966 * 967 * If we manually retrieved sense into a CCB and got 968 * something other than "NO SENSE" send the updated CCB 969 * back to the client via xpt_done() to be processed via 970 * the error recovery code again. 971 */ 972 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) { 973 scsi_cmd = (struct scsi_start_stop_unit *) 974 &done_ccb->csio.cdb_io.cdb_bytes; 975 976 if (scsi_cmd->opcode == START_STOP_UNIT) 977 xpt_async(AC_INQ_CHANGED, 978 done_ccb->ccb_h.path, NULL); 979 if (scsi_cmd->opcode == REQUEST_SENSE) { 980 u_int sense_key; 981 982 sense_key = saved_ccb->csio.sense_data.flags; 983 sense_key &= SSD_KEY; 984 if (sense_key != SSD_KEY_NO_SENSE) { 985 saved_ccb->ccb_h.status |= 986 CAM_AUTOSNS_VALID; 987 #if 0 988 xpt_print_path(saved_ccb->ccb_h.path); 989 printf("Recovered Sense\n"); 990 scsi_sense_print(&saved_ccb->csio); 991 cam_error_print(saved_ccb, CAM_ESF_ALL, 992 CAM_EPF_ALL); 993 #endif 994 xpt_done_ccb = TRUE; 995 } 996 } 997 } 998 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 999 sizeof(union ccb)); 1000 1001 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1002 1003 if (xpt_done_ccb == FALSE) 1004 xpt_action(done_ccb); 1005 1006 break; 1007 } 1008 case CAM_SCSI_STATUS_ERROR: 1009 scsi_cmd = (struct scsi_start_stop_unit *) 1010 &done_ccb->csio.cdb_io.cdb_bytes; 1011 if (sense != 0) { 1012 struct ccb_getdev cgd; 1013 struct scsi_sense_data *sense; 1014 int error_code, sense_key, asc, ascq; 1015 scsi_sense_action err_action; 1016 1017 sense = &done_ccb->csio.sense_data; 1018 scsi_extract_sense(sense, &error_code, 1019 &sense_key, &asc, &ascq); 1020 1021 /* 1022 * Grab the inquiry data for this device. 1023 */ 1024 xpt_setup_ccb(&cgd.ccb_h, done_ccb->ccb_h.path, 1025 /*priority*/ 1); 1026 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1027 xpt_action((union ccb *)&cgd); 1028 err_action = scsi_error_action(&done_ccb->csio, 1029 &cgd.inq_data, 0); 1030 1031 /* 1032 * If the error is "invalid field in CDB", 1033 * and the load/eject flag is set, turn the 1034 * flag off and try again. This is just in 1035 * case the drive in question barfs on the 1036 * load eject flag. The CAM code should set 1037 * the load/eject flag by default for 1038 * removable media. 1039 */ 1040 1041 /* XXX KDM 1042 * Should we check to see what the specific 1043 * scsi status is?? Or does it not matter 1044 * since we already know that there was an 1045 * error, and we know what the specific 1046 * error code was, and we know what the 1047 * opcode is.. 1048 */ 1049 if ((scsi_cmd->opcode == START_STOP_UNIT) && 1050 ((scsi_cmd->how & SSS_LOEJ) != 0) && 1051 (asc == 0x24) && (ascq == 0x00) && 1052 (done_ccb->ccb_h.retry_count > 0)) { 1053 1054 scsi_cmd->how &= ~SSS_LOEJ; 1055 1056 xpt_action(done_ccb); 1057 1058 } else if ((done_ccb->ccb_h.retry_count > 1) 1059 && ((err_action & SS_MASK) != SS_FAIL)) { 1060 1061 /* 1062 * In this case, the error recovery 1063 * command failed, but we've got 1064 * some retries left on it. Give 1065 * it another try unless this is an 1066 * unretryable error. 1067 */ 1068 1069 /* set the timeout to .5 sec */ 1070 relsim_flags = 1071 RELSIM_RELEASE_AFTER_TIMEOUT; 1072 timeout = 500; 1073 1074 xpt_action(done_ccb); 1075 1076 break; 1077 1078 } else { 1079 /* 1080 * Perform the final retry with the original 1081 * CCB so that final error processing is 1082 * performed by the owner of the CCB. 1083 */ 1084 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1085 done_ccb, sizeof(union ccb)); 1086 1087 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1088 1089 xpt_action(done_ccb); 1090 } 1091 } else { 1092 /* 1093 * Eh?? The command failed, but we don't 1094 * have any sense. What's up with that? 1095 * Fire the CCB again to return it to the 1096 * caller. 1097 */ 1098 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 1099 done_ccb, sizeof(union ccb)); 1100 1101 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1102 1103 xpt_action(done_ccb); 1104 1105 } 1106 break; 1107 default: 1108 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 1109 sizeof(union ccb)); 1110 1111 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1112 1113 xpt_action(done_ccb); 1114 1115 break; 1116 } 1117 1118 /* decrement the retry count */ 1119 /* 1120 * XXX This isn't appropriate in all cases. Restructure, 1121 * so that the retry count is only decremented on an 1122 * actual retry. Remeber that the orignal ccb had its 1123 * retry count dropped before entering recovery, so 1124 * doing it again is a bug. 1125 */ 1126 if (done_ccb->ccb_h.retry_count > 0) 1127 done_ccb->ccb_h.retry_count--; 1128 1129 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 1130 /*relsim_flags*/relsim_flags, 1131 /*openings*/0, 1132 /*timeout*/timeout, 1133 /*getcount_only*/0); 1134 if (xpt_done_ccb == TRUE) 1135 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 1136 } 1137 1138 /* 1139 * Generic Async Event handler. Peripheral drivers usually 1140 * filter out the events that require personal attention, 1141 * and leave the rest to this function. 1142 */ 1143 void 1144 cam_periph_async(struct cam_periph *periph, u_int32_t code, 1145 struct cam_path *path, void *arg) 1146 { 1147 switch (code) { 1148 case AC_LOST_DEVICE: 1149 cam_periph_invalidate(periph); 1150 break; 1151 case AC_SENT_BDR: 1152 case AC_BUS_RESET: 1153 { 1154 cam_periph_bus_settle(periph, scsi_delay); 1155 break; 1156 } 1157 default: 1158 break; 1159 } 1160 } 1161 1162 void 1163 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle) 1164 { 1165 struct ccb_getdevstats cgds; 1166 1167 xpt_setup_ccb(&cgds.ccb_h, periph->path, /*priority*/1); 1168 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1169 xpt_action((union ccb *)&cgds); 1170 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle); 1171 } 1172 1173 void 1174 cam_periph_freeze_after_event(struct cam_periph *periph, 1175 struct timeval* event_time, u_int duration_ms) 1176 { 1177 struct timeval delta; 1178 struct timeval duration_tv; 1179 int s; 1180 1181 s = splclock(); 1182 microtime(&delta); 1183 splx(s); 1184 timevalsub(&delta, event_time); 1185 duration_tv.tv_sec = duration_ms / 1000; 1186 duration_tv.tv_usec = (duration_ms % 1000) * 1000; 1187 if (timevalcmp(&delta, &duration_tv, <)) { 1188 timevalsub(&duration_tv, &delta); 1189 1190 duration_ms = duration_tv.tv_sec * 1000; 1191 duration_ms += duration_tv.tv_usec / 1000; 1192 cam_freeze_devq(periph->path); 1193 cam_release_devq(periph->path, 1194 RELSIM_RELEASE_AFTER_TIMEOUT, 1195 /*reduction*/0, 1196 /*timeout*/duration_ms, 1197 /*getcount_only*/0); 1198 } 1199 1200 } 1201 1202 static int 1203 camperiphscsistatuserror(union ccb *ccb, cam_flags camflags, 1204 u_int32_t sense_flags, union ccb *save_ccb, 1205 int *openings, u_int32_t *relsim_flags, 1206 u_int32_t *timeout) 1207 { 1208 int error; 1209 1210 switch (ccb->csio.scsi_status) { 1211 case SCSI_STATUS_OK: 1212 case SCSI_STATUS_COND_MET: 1213 case SCSI_STATUS_INTERMED: 1214 case SCSI_STATUS_INTERMED_COND_MET: 1215 error = 0; 1216 break; 1217 case SCSI_STATUS_CMD_TERMINATED: 1218 case SCSI_STATUS_CHECK_COND: 1219 error = camperiphscsisenseerror(ccb, 1220 camflags, 1221 sense_flags, 1222 save_ccb, 1223 openings, 1224 relsim_flags, 1225 timeout); 1226 break; 1227 case SCSI_STATUS_QUEUE_FULL: 1228 { 1229 /* no decrement */ 1230 struct ccb_getdevstats cgds; 1231 1232 /* 1233 * First off, find out what the current 1234 * transaction counts are. 1235 */ 1236 xpt_setup_ccb(&cgds.ccb_h, 1237 ccb->ccb_h.path, 1238 /*priority*/1); 1239 cgds.ccb_h.func_code = XPT_GDEV_STATS; 1240 xpt_action((union ccb *)&cgds); 1241 1242 /* 1243 * If we were the only transaction active, treat 1244 * the QUEUE FULL as if it were a BUSY condition. 1245 */ 1246 if (cgds.dev_active != 0) { 1247 int total_openings; 1248 1249 /* 1250 * Reduce the number of openings to 1251 * be 1 less than the amount it took 1252 * to get a queue full bounded by the 1253 * minimum allowed tag count for this 1254 * device. 1255 */ 1256 total_openings = cgds.dev_active + cgds.dev_openings; 1257 *openings = cgds.dev_active; 1258 if (*openings < cgds.mintags) 1259 *openings = cgds.mintags; 1260 if (*openings < total_openings) 1261 *relsim_flags = RELSIM_ADJUST_OPENINGS; 1262 else { 1263 /* 1264 * Some devices report queue full for 1265 * temporary resource shortages. For 1266 * this reason, we allow a minimum 1267 * tag count to be entered via a 1268 * quirk entry to prevent the queue 1269 * count on these devices from falling 1270 * to a pessimisticly low value. We 1271 * still wait for the next successful 1272 * completion, however, before queueing 1273 * more transactions to the device. 1274 */ 1275 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT; 1276 } 1277 *timeout = 0; 1278 error = ERESTART; 1279 if (bootverbose) { 1280 xpt_print_path(ccb->ccb_h.path); 1281 printf("Queue Full\n"); 1282 } 1283 break; 1284 } 1285 /* FALLTHROUGH */ 1286 } 1287 case SCSI_STATUS_BUSY: 1288 /* 1289 * Restart the queue after either another 1290 * command completes or a 1 second timeout. 1291 */ 1292 if (bootverbose) { 1293 xpt_print_path(ccb->ccb_h.path); 1294 printf("Device Busy\n"); 1295 } 1296 if (ccb->ccb_h.retry_count > 0) { 1297 ccb->ccb_h.retry_count--; 1298 error = ERESTART; 1299 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1300 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1301 *timeout = 1000; 1302 } else { 1303 error = EIO; 1304 } 1305 break; 1306 case SCSI_STATUS_RESERV_CONFLICT: 1307 xpt_print_path(ccb->ccb_h.path); 1308 printf("Reservation Conflict\n"); 1309 error = EIO; 1310 break; 1311 default: 1312 xpt_print_path(ccb->ccb_h.path); 1313 printf("SCSI Status 0x%x\n", ccb->csio.scsi_status); 1314 error = EIO; 1315 break; 1316 } 1317 return (error); 1318 } 1319 1320 static int 1321 camperiphscsisenseerror(union ccb *ccb, cam_flags camflags, 1322 u_int32_t sense_flags, union ccb *save_ccb, 1323 int *openings, u_int32_t *relsim_flags, 1324 u_int32_t *timeout) 1325 { 1326 struct cam_periph *periph; 1327 int error; 1328 1329 periph = xpt_path_periph(ccb->ccb_h.path); 1330 if (periph->flags & CAM_PERIPH_RECOVERY_INPROG) { 1331 1332 /* 1333 * If error recovery is already in progress, don't attempt 1334 * to process this error, but requeue it unconditionally 1335 * and attempt to process it once error recovery has 1336 * completed. This failed command is probably related to 1337 * the error that caused the currently active error recovery 1338 * action so our current recovery efforts should also 1339 * address this command. Be aware that the error recovery 1340 * code assumes that only one recovery action is in progress 1341 * on a particular peripheral instance at any given time 1342 * (e.g. only one saved CCB for error recovery) so it is 1343 * imperitive that we don't violate this assumption. 1344 */ 1345 error = ERESTART; 1346 } else { 1347 scsi_sense_action err_action; 1348 struct ccb_getdev cgd; 1349 const char *action_string; 1350 union ccb* print_ccb; 1351 1352 /* A description of the error recovery action performed */ 1353 action_string = NULL; 1354 1355 /* 1356 * The location of the orignal ccb 1357 * for sense printing purposes. 1358 */ 1359 print_ccb = ccb; 1360 1361 /* 1362 * Grab the inquiry data for this device. 1363 */ 1364 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, /*priority*/ 1); 1365 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1366 xpt_action((union ccb *)&cgd); 1367 1368 if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) 1369 err_action = scsi_error_action(&ccb->csio, 1370 &cgd.inq_data, 1371 sense_flags); 1372 else if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) 1373 err_action = SS_REQSENSE; 1374 else 1375 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO; 1376 1377 error = err_action & SS_ERRMASK; 1378 1379 /* 1380 * If the recovery action will consume a retry, 1381 * make sure we actually have retries available. 1382 */ 1383 if ((err_action & SSQ_DECREMENT_COUNT) != 0) { 1384 if (ccb->ccb_h.retry_count > 0) 1385 ccb->ccb_h.retry_count--; 1386 else { 1387 action_string = "Retries Exhausted"; 1388 goto sense_error_done; 1389 } 1390 } 1391 1392 if ((err_action & SS_MASK) >= SS_START) { 1393 /* 1394 * Do common portions of commands that 1395 * use recovery CCBs. 1396 */ 1397 if (save_ccb == NULL) { 1398 action_string = "No recovery CCB supplied"; 1399 goto sense_error_done; 1400 } 1401 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1402 print_ccb = save_ccb; 1403 periph->flags |= CAM_PERIPH_RECOVERY_INPROG; 1404 } 1405 1406 switch (err_action & SS_MASK) { 1407 case SS_NOP: 1408 action_string = "No Recovery Action Needed"; 1409 error = 0; 1410 break; 1411 case SS_RETRY: 1412 action_string = "Retrying Command (per Sense Data)"; 1413 error = ERESTART; 1414 break; 1415 case SS_FAIL: 1416 action_string = "Unretryable error"; 1417 break; 1418 case SS_START: 1419 { 1420 int le; 1421 1422 /* 1423 * Send a start unit command to the device, and 1424 * then retry the command. 1425 */ 1426 action_string = "Attempting to Start Unit"; 1427 1428 /* 1429 * Check for removable media and set 1430 * load/eject flag appropriately. 1431 */ 1432 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1433 le = TRUE; 1434 else 1435 le = FALSE; 1436 1437 scsi_start_stop(&ccb->csio, 1438 /*retries*/1, 1439 camperiphdone, 1440 MSG_SIMPLE_Q_TAG, 1441 /*start*/TRUE, 1442 /*load/eject*/le, 1443 /*immediate*/FALSE, 1444 SSD_FULL_SIZE, 1445 /*timeout*/50000); 1446 break; 1447 } 1448 case SS_TUR: 1449 { 1450 /* 1451 * Send a Test Unit Ready to the device. 1452 * If the 'many' flag is set, we send 120 1453 * test unit ready commands, one every half 1454 * second. Otherwise, we just send one TUR. 1455 * We only want to do this if the retry 1456 * count has not been exhausted. 1457 */ 1458 int retries; 1459 1460 if ((err_action & SSQ_MANY) != 0) { 1461 action_string = "Polling device for readiness"; 1462 retries = 120; 1463 } else { 1464 action_string = "Testing device for readiness"; 1465 retries = 1; 1466 } 1467 scsi_test_unit_ready(&ccb->csio, 1468 retries, 1469 camperiphdone, 1470 MSG_SIMPLE_Q_TAG, 1471 SSD_FULL_SIZE, 1472 /*timeout*/5000); 1473 1474 /* 1475 * Accomplish our 500ms delay by deferring 1476 * the release of our device queue appropriately. 1477 */ 1478 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1479 *timeout = 500; 1480 break; 1481 } 1482 case SS_REQSENSE: 1483 { 1484 /* 1485 * Send a Request Sense to the device. We 1486 * assume that we are in a contingent allegiance 1487 * condition so we do not tag this request. 1488 */ 1489 scsi_request_sense(&ccb->csio, /*retries*/1, 1490 camperiphdone, 1491 &save_ccb->csio.sense_data, 1492 sizeof(save_ccb->csio.sense_data), 1493 CAM_TAG_ACTION_NONE, 1494 /*sense_len*/SSD_FULL_SIZE, 1495 /*timeout*/5000); 1496 break; 1497 } 1498 default: 1499 panic("Unhandled error action %x", err_action); 1500 } 1501 1502 if ((err_action & SS_MASK) >= SS_START) { 1503 /* 1504 * Drop the priority to 0 so that the recovery 1505 * CCB is the first to execute. Freeze the queue 1506 * after this command is sent so that we can 1507 * restore the old csio and have it queued in 1508 * the proper order before we release normal 1509 * transactions to the device. 1510 */ 1511 ccb->ccb_h.pinfo.priority = 0; 1512 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1513 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1514 error = ERESTART; 1515 } 1516 1517 sense_error_done: 1518 if ((err_action & SSQ_PRINT_SENSE) != 0 1519 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) { 1520 cam_error_print(print_ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1521 xpt_print_path(ccb->ccb_h.path); 1522 if (bootverbose) 1523 scsi_sense_print(&print_ccb->csio); 1524 printf("%s\n", action_string); 1525 } 1526 } 1527 return (error); 1528 } 1529 1530 /* 1531 * Generic error handler. Peripheral drivers usually filter 1532 * out the errors that they handle in a unique mannor, then 1533 * call this function. 1534 */ 1535 int 1536 cam_periph_error(union ccb *ccb, cam_flags camflags, 1537 u_int32_t sense_flags, union ccb *save_ccb) 1538 { 1539 const char *action_string; 1540 cam_status status; 1541 int frozen; 1542 int error, printed = 0; 1543 int openings; 1544 u_int32_t relsim_flags; 1545 u_int32_t timeout = 0; 1546 1547 action_string = NULL; 1548 status = ccb->ccb_h.status; 1549 frozen = (status & CAM_DEV_QFRZN) != 0; 1550 status &= CAM_STATUS_MASK; 1551 openings = relsim_flags = 0; 1552 1553 switch (status) { 1554 case CAM_REQ_CMP: 1555 error = 0; 1556 break; 1557 case CAM_SCSI_STATUS_ERROR: 1558 error = camperiphscsistatuserror(ccb, 1559 camflags, 1560 sense_flags, 1561 save_ccb, 1562 &openings, 1563 &relsim_flags, 1564 &timeout); 1565 break; 1566 case CAM_AUTOSENSE_FAIL: 1567 xpt_print_path(ccb->ccb_h.path); 1568 printf("AutoSense Failed\n"); 1569 error = EIO; /* we have to kill the command */ 1570 break; 1571 case CAM_REQ_CMP_ERR: 1572 if (bootverbose && printed == 0) { 1573 xpt_print_path(ccb->ccb_h.path); 1574 printf("Request completed with CAM_REQ_CMP_ERR\n"); 1575 printed++; 1576 } 1577 /* FALLTHROUGH */ 1578 case CAM_CMD_TIMEOUT: 1579 if (bootverbose && printed == 0) { 1580 xpt_print_path(ccb->ccb_h.path); 1581 printf("Command timed out\n"); 1582 printed++; 1583 } 1584 /* FALLTHROUGH */ 1585 case CAM_UNEXP_BUSFREE: 1586 if (bootverbose && printed == 0) { 1587 xpt_print_path(ccb->ccb_h.path); 1588 printf("Unexpected Bus Free\n"); 1589 printed++; 1590 } 1591 /* FALLTHROUGH */ 1592 case CAM_UNCOR_PARITY: 1593 if (bootverbose && printed == 0) { 1594 xpt_print_path(ccb->ccb_h.path); 1595 printf("Uncorrected Parity Error\n"); 1596 printed++; 1597 } 1598 /* FALLTHROUGH */ 1599 case CAM_DATA_RUN_ERR: 1600 if (bootverbose && printed == 0) { 1601 xpt_print_path(ccb->ccb_h.path); 1602 printf("Data Overrun\n"); 1603 printed++; 1604 } 1605 error = EIO; /* we have to kill the command */ 1606 /* decrement the number of retries */ 1607 if (ccb->ccb_h.retry_count > 0) { 1608 ccb->ccb_h.retry_count--; 1609 error = ERESTART; 1610 } else { 1611 action_string = "Retries Exausted"; 1612 error = EIO; 1613 } 1614 break; 1615 case CAM_UA_ABORT: 1616 case CAM_UA_TERMIO: 1617 case CAM_MSG_REJECT_REC: 1618 /* XXX Don't know that these are correct */ 1619 error = EIO; 1620 break; 1621 case CAM_SEL_TIMEOUT: 1622 { 1623 struct cam_path *newpath; 1624 1625 if ((camflags & CAM_RETRY_SELTO) != 0) { 1626 if (ccb->ccb_h.retry_count > 0) { 1627 1628 ccb->ccb_h.retry_count--; 1629 error = ERESTART; 1630 if (bootverbose && printed == 0) { 1631 xpt_print_path(ccb->ccb_h.path); 1632 printf("Selection Timeout\n"); 1633 printed++; 1634 } 1635 1636 /* 1637 * Wait a bit to give the device 1638 * time to recover before we try again. 1639 */ 1640 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1641 timeout = periph_selto_delay; 1642 break; 1643 } 1644 } 1645 error = ENXIO; 1646 /* Should we do more if we can't create the path?? */ 1647 if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path), 1648 xpt_path_path_id(ccb->ccb_h.path), 1649 xpt_path_target_id(ccb->ccb_h.path), 1650 CAM_LUN_WILDCARD) != CAM_REQ_CMP) 1651 break; 1652 1653 /* 1654 * Let peripheral drivers know that this device has gone 1655 * away. 1656 */ 1657 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1658 xpt_free_path(newpath); 1659 break; 1660 } 1661 case CAM_REQ_INVALID: 1662 case CAM_PATH_INVALID: 1663 case CAM_DEV_NOT_THERE: 1664 case CAM_NO_HBA: 1665 case CAM_PROVIDE_FAIL: 1666 case CAM_REQ_TOO_BIG: 1667 case CAM_LUN_INVALID: 1668 case CAM_TID_INVALID: 1669 error = EINVAL; 1670 break; 1671 case CAM_SCSI_BUS_RESET: 1672 case CAM_BDR_SENT: 1673 /* 1674 * Commands that repeatedly timeout and cause these 1675 * kinds of error recovery actions, should return 1676 * CAM_CMD_TIMEOUT, which allows us to safely assume 1677 * that this command was an innocent bystander to 1678 * these events and should be unconditionally 1679 * retried. 1680 */ 1681 if (bootverbose && printed == 0) { 1682 xpt_print_path(ccb->ccb_h.path); 1683 if (status == CAM_BDR_SENT) 1684 printf("Bus Device Reset sent\n"); 1685 else 1686 printf("Bus Reset issued\n"); 1687 printed++; 1688 } 1689 /* FALLTHROUGH */ 1690 case CAM_REQUEUE_REQ: 1691 /* Unconditional requeue */ 1692 error = ERESTART; 1693 if (bootverbose && printed == 0) { 1694 xpt_print_path(ccb->ccb_h.path); 1695 printf("Request Requeued\n"); 1696 printed++; 1697 } 1698 break; 1699 case CAM_RESRC_UNAVAIL: 1700 /* Wait a bit for the resource shortage to abate. */ 1701 timeout = periph_noresrc_delay; 1702 /* FALLTHROUGH */ 1703 case CAM_BUSY: 1704 if (timeout == 0) { 1705 /* Wait a bit for the busy condition to abate. */ 1706 timeout = periph_busy_delay; 1707 } 1708 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT; 1709 /* FALLTHROUGH */ 1710 default: 1711 /* decrement the number of retries */ 1712 if (ccb->ccb_h.retry_count > 0) { 1713 ccb->ccb_h.retry_count--; 1714 error = ERESTART; 1715 if (bootverbose && printed == 0) { 1716 xpt_print_path(ccb->ccb_h.path); 1717 printf("CAM Status 0x%x\n", status); 1718 printed++; 1719 } 1720 } else { 1721 error = EIO; 1722 action_string = "Retries Exhausted"; 1723 } 1724 break; 1725 } 1726 1727 /* Attempt a retry */ 1728 if (error == ERESTART || error == 0) { 1729 if (frozen != 0) 1730 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1731 1732 if (error == ERESTART) { 1733 action_string = "Retrying Command"; 1734 xpt_action(ccb); 1735 } 1736 1737 if (frozen != 0) 1738 cam_release_devq(ccb->ccb_h.path, 1739 relsim_flags, 1740 openings, 1741 timeout, 1742 /*getcount_only*/0); 1743 } 1744 1745 /* 1746 * If we have and error and are booting verbosely, whine 1747 * *unless* this was a non-retryable selection timeout. 1748 */ 1749 if (error != 0 && bootverbose && 1750 !(status == CAM_SEL_TIMEOUT && (camflags & CAM_RETRY_SELTO) == 0)) { 1751 1752 1753 if (action_string == NULL) 1754 action_string = "Unretryable Error"; 1755 if (error != ERESTART) { 1756 xpt_print_path(ccb->ccb_h.path); 1757 printf("error %d\n", error); 1758 } 1759 xpt_print_path(ccb->ccb_h.path); 1760 printf("%s\n", action_string); 1761 } 1762 1763 return (error); 1764 }
Cache object: 08d72233e1045ea73f33e9ede7a201e7
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