1 /* 2 * Common functions for CAM "type" (peripheral) drivers. 3 * 4 * Copyright (c) 1997, 1998 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998 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 * $Id: cam_periph.c,v 1.6 1998/10/22 22:16:48 ken Exp $ 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/kernel.h> 37 #include <sys/buf.h> 38 #include <sys/proc.h> 39 #include <sys/devicestat.h> 40 #include <vm/vm.h> 41 #include <vm/vm_extern.h> 42 43 #include <cam/cam.h> 44 #include <cam/cam_conf.h> 45 #include <cam/cam_ccb.h> 46 #include <cam/cam_xpt_periph.h> 47 #include <cam/cam_periph.h> 48 #include <cam/cam_debug.h> 49 50 #include <cam/scsi/scsi_all.h> 51 #include <cam/scsi/scsi_message.h> 52 #include <cam/scsi/scsi_da.h> 53 #include <cam/scsi/scsi_pass.h> 54 55 static u_int camperiphnextunit(struct periph_driver *p_drv, 56 u_int newunit, int wired); 57 static u_int camperiphunit(struct periph_driver *p_drv, 58 path_id_t path_id_t, 59 target_id_t target, lun_id_t lun); 60 static void camperiphdone(struct cam_periph *periph, 61 union ccb *done_ccb); 62 static void camperiphfree(struct cam_periph *periph); 63 64 cam_status 65 cam_periph_alloc(periph_ctor_t *periph_ctor, 66 periph_oninv_t *periph_oninvalidate, 67 periph_dtor_t *periph_dtor, periph_start_t *periph_start, 68 char *name, cam_periph_type type, struct cam_path *path, 69 ac_callback_t *ac_callback, ac_code code, void *arg) 70 { 71 struct periph_driver **p_drv; 72 struct cam_periph *periph; 73 struct cam_periph *cur_periph; 74 path_id_t path_id; 75 target_id_t target_id; 76 lun_id_t lun_id; 77 cam_status status; 78 u_int init_level; 79 int s; 80 81 init_level = 0; 82 /* 83 * Handle Hot-Plug scenarios. If there is already a peripheral 84 * of our type assigned to this path, we are likely waiting for 85 * final close on an old, invalidated, peripheral. If this is 86 * the case, queue up a deferred call to the peripheral's async 87 * handler. If it looks like a mistaken re-alloation, complain. 88 */ 89 if ((periph = cam_periph_find(path, name)) != NULL) { 90 91 if ((periph->flags & CAM_PERIPH_INVALID) != 0 92 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) { 93 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND; 94 periph->deferred_callback = ac_callback; 95 periph->deferred_ac = code; 96 return (CAM_REQ_INPROG); 97 } else { 98 printf("cam_periph_alloc: attempt to re-allocate " 99 "valid device %s%d rejected\n", 100 periph->periph_name, periph->unit_number); 101 } 102 return (CAM_REQ_INVALID); 103 } 104 105 periph = (struct cam_periph *)malloc(sizeof(*periph), M_DEVBUF, 106 M_NOWAIT); 107 108 if (periph == NULL) 109 return (CAM_RESRC_UNAVAIL); 110 111 init_level++; 112 113 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 114 *p_drv != NULL; p_drv++) { 115 if (strcmp((*p_drv)->driver_name, name) == 0) 116 break; 117 } 118 119 path_id = xpt_path_path_id(path); 120 target_id = xpt_path_target_id(path); 121 lun_id = xpt_path_lun_id(path); 122 bzero(periph, sizeof(*periph)); 123 cam_init_pinfo(&periph->pinfo); 124 periph->periph_start = periph_start; 125 periph->periph_dtor = periph_dtor; 126 periph->periph_oninval = periph_oninvalidate; 127 periph->type = type; 128 periph->periph_name = name; 129 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id); 130 periph->immediate_priority = CAM_PRIORITY_NONE; 131 periph->refcount = 0; 132 SLIST_INIT(&periph->ccb_list); 133 status = xpt_create_path(&path, periph, path_id, target_id, lun_id); 134 if (status != CAM_REQ_CMP) 135 goto failure; 136 137 periph->path = path; 138 init_level++; 139 140 status = xpt_add_periph(periph); 141 142 if (status != CAM_REQ_CMP) 143 goto failure; 144 145 s = splsoftcam(); 146 cur_periph = TAILQ_FIRST(&(*p_drv)->units); 147 while (cur_periph != NULL 148 && cur_periph->unit_number < periph->unit_number) 149 cur_periph = TAILQ_NEXT(cur_periph, unit_links); 150 151 if (cur_periph != NULL) 152 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links); 153 else { 154 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links); 155 (*p_drv)->generation++; 156 } 157 158 splx(s); 159 160 init_level++; 161 162 status = periph_ctor(periph, arg); 163 164 if (status == CAM_REQ_CMP) 165 init_level++; 166 167 failure: 168 switch (init_level) { 169 case 4: 170 /* Initialized successfully */ 171 break; 172 case 3: 173 s = splsoftcam(); 174 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 175 splx(s); 176 xpt_remove_periph(periph); 177 case 2: 178 xpt_free_path(periph->path); 179 case 1: 180 free(periph, M_DEVBUF); 181 case 0: 182 /* No cleanup to perform. */ 183 break; 184 default: 185 panic("cam_periph_alloc: Unkown init level"); 186 } 187 return(status); 188 } 189 190 /* 191 * Find a peripheral structure with the specified path, target, lun, 192 * and (optionally) type. If the name is NULL, this function will return 193 * the first peripheral driver that matches the specified path. 194 */ 195 struct cam_periph * 196 cam_periph_find(struct cam_path *path, char *name) 197 { 198 struct periph_driver **p_drv; 199 struct cam_periph *periph; 200 int s; 201 202 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 203 *p_drv != NULL; p_drv++) { 204 205 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0)) 206 continue; 207 208 s = splsoftcam(); 209 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 210 periph = TAILQ_NEXT(periph, unit_links)) { 211 if (xpt_path_comp(periph->path, path) == 0) { 212 splx(s); 213 return(periph); 214 } 215 } 216 splx(s); 217 if (name != NULL) 218 return(NULL); 219 } 220 return(NULL); 221 } 222 223 cam_status 224 cam_periph_acquire(struct cam_periph *periph) 225 { 226 int s; 227 228 if (periph == NULL) 229 return(CAM_REQ_CMP_ERR); 230 231 s = splsoftcam(); 232 periph->refcount++; 233 splx(s); 234 235 return(CAM_REQ_CMP); 236 } 237 238 void 239 cam_periph_release(struct cam_periph *periph) 240 { 241 int s; 242 243 if (periph == NULL) 244 return; 245 246 s = splsoftcam(); 247 if ((--periph->refcount == 0) 248 && (periph->flags & CAM_PERIPH_INVALID)) { 249 camperiphfree(periph); 250 } 251 splx(s); 252 253 } 254 255 /* 256 * Look for the next unit number that is not currently in use for this 257 * peripheral type starting at "newunit". Also exclude unit numbers that 258 * are reserved by for future "hardwiring" unless we already know that this 259 * is a potential wired device. Only assume that the device is "wired" the 260 * first time through the loop since after that we'll be looking at unit 261 * numbers that did not match a wiring entry. 262 */ 263 static u_int 264 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired) 265 { 266 struct cam_periph *periph; 267 struct cam_periph_config *periph_conf; 268 char *periph_name; 269 int s; 270 271 s = splsoftcam(); 272 periph_name = p_drv->driver_name; 273 for (;;newunit++) { 274 275 for (periph = TAILQ_FIRST(&p_drv->units); 276 periph != NULL && periph->unit_number != newunit; 277 periph = TAILQ_NEXT(periph, unit_links)) 278 ; 279 280 if (periph != NULL && periph->unit_number == newunit) { 281 if (wired != 0) { 282 xpt_print_path(periph->path); 283 printf("Duplicate Wired Device entry!\n"); 284 xpt_print_path(periph->path); 285 printf("Second device will not be wired\n"); 286 wired = 0; 287 } 288 continue; 289 } 290 291 for (periph_conf = cam_pinit; 292 wired == 0 && periph_conf->periph_name != NULL; 293 periph_conf++) { 294 295 /* 296 * Don't match entries like "da 4" as a wired down 297 * device, but do match entries like "da 4 target 5" 298 * or even "da 4 scbus 1". 299 */ 300 if (IS_SPECIFIED(periph_conf->periph_unit) 301 && (!strcmp(periph_name, periph_conf->periph_name)) 302 && (IS_SPECIFIED(periph_conf->target) 303 || IS_SPECIFIED(periph_conf->pathid)) 304 && (newunit == periph_conf->periph_unit)) 305 break; 306 } 307 308 if (wired != 0 || periph_conf->periph_name == NULL) 309 break; 310 } 311 splx(s); 312 return (newunit); 313 } 314 315 static u_int 316 camperiphunit(struct periph_driver *p_drv, path_id_t pathid, 317 target_id_t target, lun_id_t lun) 318 { 319 struct cam_periph_config *periph_conf; 320 u_int unit; 321 int hit; 322 323 unit = 0; 324 hit = 0; 325 326 for (periph_conf = cam_pinit; 327 periph_conf->periph_name != NULL; 328 periph_conf++, hit = 0) { 329 330 if (!strcmp(p_drv->driver_name, periph_conf->periph_name) 331 && IS_SPECIFIED(periph_conf->periph_unit)) { 332 333 if (IS_SPECIFIED(periph_conf->pathid)) { 334 335 if (pathid != periph_conf->pathid) 336 continue; 337 hit++; 338 } 339 340 if (IS_SPECIFIED(periph_conf->target)) { 341 342 if (target != periph_conf->target) 343 continue; 344 hit++; 345 } 346 347 if (IS_SPECIFIED(periph_conf->lun)) { 348 349 if (lun != periph_conf->lun) 350 continue; 351 hit++; 352 } 353 354 if (hit != 0) { 355 unit = periph_conf->periph_unit; 356 break; 357 } 358 } 359 } 360 361 /* 362 * Either start from 0 looking for the next unit or from 363 * the unit number given in the periph_conf. This way, 364 * if we have wildcard matches, we don't return the same 365 * unit number twice. 366 */ 367 unit = camperiphnextunit(p_drv, unit, /*wired*/hit); 368 369 return (unit); 370 } 371 372 void 373 cam_periph_invalidate(struct cam_periph *periph) 374 { 375 int s; 376 377 s = splsoftcam(); 378 /* 379 * We only call this routine the first time a peripheral is 380 * invalidated. The oninvalidate() routine is always called at 381 * splsoftcam(). 382 */ 383 if (((periph->flags & CAM_PERIPH_INVALID) == 0) 384 && (periph->periph_oninval != NULL)) 385 periph->periph_oninval(periph); 386 387 periph->flags |= CAM_PERIPH_INVALID; 388 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND; 389 390 if (periph->refcount == 0) 391 camperiphfree(periph); 392 else if (periph->refcount < 0) 393 printf("cam_invalidate_periph: refcount < 0!!\n"); 394 splx(s); 395 } 396 397 static void 398 camperiphfree(struct cam_periph *periph) 399 { 400 int s; 401 struct periph_driver **p_drv; 402 403 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 404 *p_drv != NULL; p_drv++) { 405 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0) 406 break; 407 } 408 409 if (periph->periph_dtor != NULL) 410 periph->periph_dtor(periph); 411 412 s = splsoftcam(); 413 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links); 414 (*p_drv)->generation++; 415 splx(s); 416 417 xpt_remove_periph(periph); 418 419 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) { 420 union ccb ccb; 421 void *arg; 422 423 switch (periph->deferred_ac) { 424 case AC_FOUND_DEVICE: 425 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 426 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 427 xpt_action(&ccb); 428 arg = &ccb; 429 break; 430 case AC_PATH_REGISTERED: 431 ccb.ccb_h.func_code = XPT_PATH_INQ; 432 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1); 433 xpt_action(&ccb); 434 arg = &ccb; 435 break; 436 default: 437 arg = NULL; 438 break; 439 } 440 periph->deferred_callback(NULL, periph->deferred_ac, 441 periph->path, arg); 442 } 443 xpt_free_path(periph->path); 444 free(periph, M_DEVBUF); 445 } 446 447 /* 448 * Wait interruptibly for an exclusive lock. 449 */ 450 int 451 cam_periph_lock(struct cam_periph *periph, int priority) 452 { 453 int error; 454 455 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) { 456 periph->flags |= CAM_PERIPH_LOCK_WANTED; 457 if ((error = tsleep(periph, priority, "caplck", 0)) != 0) 458 return error; 459 } 460 461 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 462 return(ENXIO); 463 464 periph->flags |= CAM_PERIPH_LOCKED; 465 return 0; 466 } 467 468 /* 469 * Unlock and wake up any waiters. 470 */ 471 void 472 cam_periph_unlock(struct cam_periph *periph) 473 { 474 periph->flags &= ~CAM_PERIPH_LOCKED; 475 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) { 476 periph->flags &= ~CAM_PERIPH_LOCK_WANTED; 477 wakeup(periph); 478 } 479 480 cam_periph_release(periph); 481 } 482 483 /* 484 * Map user virtual pointers into kernel virtual address space, so we can 485 * access the memory. This won't work on physical pointers, for now it's 486 * up to the caller to check for that. (XXX KDM -- should we do that here 487 * instead?) This also only works for up to MAXPHYS memory. Since we use 488 * buffers to map stuff in and out, we're limited to the buffer size. 489 */ 490 int 491 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 492 { 493 int numbufs, i; 494 int flags[CAM_PERIPH_MAXMAPS]; 495 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 496 u_int32_t lengths[CAM_PERIPH_MAXMAPS]; 497 u_int32_t dirs[CAM_PERIPH_MAXMAPS]; 498 499 switch(ccb->ccb_h.func_code) { 500 case XPT_DEV_MATCH: 501 if (ccb->cdm.match_buf_len == 0) { 502 printf("cam_periph_mapmem: invalid match buffer " 503 "length 0\n"); 504 return(EINVAL); 505 } 506 if (ccb->cdm.pattern_buf_len > 0) { 507 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 508 lengths[0] = ccb->cdm.pattern_buf_len; 509 dirs[0] = CAM_DIR_OUT; 510 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 511 lengths[1] = ccb->cdm.match_buf_len; 512 dirs[1] = CAM_DIR_IN; 513 numbufs = 2; 514 } else { 515 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 516 lengths[0] = ccb->cdm.match_buf_len; 517 dirs[0] = CAM_DIR_IN; 518 numbufs = 1; 519 } 520 break; 521 case XPT_SCSI_IO: 522 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) 523 return(0); 524 525 data_ptrs[0] = &ccb->csio.data_ptr; 526 lengths[0] = ccb->csio.dxfer_len; 527 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK; 528 numbufs = 1; 529 break; 530 default: 531 return(EINVAL); 532 break; /* NOTREACHED */ 533 } 534 535 /* 536 * Check the transfer length and permissions first, so we don't 537 * have to unmap any previously mapped buffers. 538 */ 539 for (i = 0; i < numbufs; i++) { 540 541 flags[i] = 0; 542 543 /* 544 * The userland data pointer passed in may not be page 545 * aligned. vmapbuf() truncates the address to a page 546 * boundary, so if the address isn't page aligned, we'll 547 * need enough space for the given transfer length, plus 548 * whatever extra space is necessary to make it to the page 549 * boundary. 550 */ 551 if ((lengths[i] + 552 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){ 553 printf("cam_periph_mapmem: attempt to map %u bytes, " 554 "which is greater than DFLTPHYS(%d)\n", 555 lengths[i] + 556 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK), 557 DFLTPHYS); 558 return(E2BIG); 559 } 560 561 if (dirs[i] & CAM_DIR_IN) { 562 flags[i] = B_READ; 563 if (useracc(*data_ptrs[i], lengths[i], B_READ) == 0){ 564 printf("cam_periph_mapmem: error, " 565 "address %p, length %lu isn't " 566 "user accessible for READ\n", 567 (void *)*data_ptrs[i], 568 (u_long)lengths[i]); 569 return(EACCES); 570 } 571 } 572 573 /* 574 * XXX this check is really bogus, since B_WRITE currently 575 * is all 0's, and so it is "set" all the time. 576 */ 577 if (dirs[i] & CAM_DIR_OUT) { 578 flags[i] |= B_WRITE; 579 if (useracc(*data_ptrs[i], lengths[i], B_WRITE) == 0){ 580 printf("cam_periph_mapmem: error, " 581 "address %p, length %lu isn't " 582 "user accessible for WRITE\n", 583 (void *)*data_ptrs[i], 584 (u_long)lengths[i]); 585 586 return(EACCES); 587 } 588 } 589 590 } 591 592 /* this keeps the current process from getting swapped */ 593 /* 594 * XXX KDM should I use P_NOSWAP instead? 595 */ 596 curproc->p_flag |= P_PHYSIO; 597 598 for (i = 0; i < numbufs; i++) { 599 /* 600 * Get the buffer. 601 */ 602 mapinfo->bp[i] = getpbuf(); 603 604 /* save the buffer's data address */ 605 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data; 606 607 /* put our pointer in the data slot */ 608 mapinfo->bp[i]->b_data = *data_ptrs[i]; 609 610 /* set the transfer length, we know it's < DFLTPHYS */ 611 mapinfo->bp[i]->b_bufsize = lengths[i]; 612 613 /* set the flags */ 614 mapinfo->bp[i]->b_flags = flags[i] | B_PHYS | B_BUSY; 615 616 /* map the buffer into kernel memory */ 617 vmapbuf(mapinfo->bp[i]); 618 619 /* set our pointer to the new mapped area */ 620 *data_ptrs[i] = mapinfo->bp[i]->b_data; 621 622 mapinfo->num_bufs_used++; 623 } 624 625 return(0); 626 } 627 628 /* 629 * Unmap memory segments mapped into kernel virtual address space by 630 * cam_periph_mapmem(). 631 */ 632 void 633 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo) 634 { 635 int numbufs, i; 636 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; 637 638 if (mapinfo->num_bufs_used <= 0) { 639 /* allow ourselves to be swapped once again */ 640 curproc->p_flag &= ~P_PHYSIO; 641 return; 642 } 643 644 switch (ccb->ccb_h.func_code) { 645 case XPT_DEV_MATCH: 646 numbufs = min(mapinfo->num_bufs_used, 2); 647 648 if (numbufs == 1) { 649 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; 650 } else { 651 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; 652 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; 653 } 654 break; 655 case XPT_SCSI_IO: 656 data_ptrs[0] = &ccb->csio.data_ptr; 657 numbufs = min(mapinfo->num_bufs_used, 1); 658 break; 659 default: 660 /* allow ourselves to be swapped once again */ 661 curproc->p_flag &= ~P_PHYSIO; 662 return; 663 break; /* NOTREACHED */ 664 } 665 666 for (i = 0; i < numbufs; i++) { 667 /* Set the user's pointer back to the original value */ 668 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr; 669 670 /* unmap the buffer */ 671 vunmapbuf(mapinfo->bp[i]); 672 673 /* clear the flags we set above */ 674 mapinfo->bp[i]->b_flags &= ~(B_PHYS|B_BUSY); 675 676 /* release the buffer */ 677 relpbuf(mapinfo->bp[i]); 678 } 679 680 /* allow ourselves to be swapped once again */ 681 curproc->p_flag &= ~P_PHYSIO; 682 } 683 684 union ccb * 685 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 686 { 687 struct ccb_hdr *ccb_h; 688 int s; 689 690 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n")); 691 692 s = splsoftcam(); 693 694 while (periph->ccb_list.slh_first == NULL) { 695 if (periph->immediate_priority > priority) 696 periph->immediate_priority = priority; 697 xpt_schedule(periph, priority); 698 if ((periph->ccb_list.slh_first != NULL) 699 && (periph->ccb_list.slh_first->pinfo.priority == priority)) 700 break; 701 tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0); 702 } 703 704 ccb_h = periph->ccb_list.slh_first; 705 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 706 splx(s); 707 return ((union ccb *)ccb_h); 708 } 709 710 void 711 cam_periph_ccbwait(union ccb *ccb) 712 { 713 int s; 714 715 s = splsoftcam(); 716 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX) 717 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)) 718 tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0); 719 720 splx(s); 721 } 722 723 int 724 cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr, 725 int (*error_routine)(union ccb *ccb, 726 cam_flags camflags, 727 u_int32_t sense_flags)) 728 { 729 union ccb *ccb; 730 int error; 731 int found; 732 733 error = found = 0; 734 735 switch(cmd){ 736 case CAMGETPASSTHRU: 737 ccb = cam_periph_getccb(periph, /* priority */ 1); 738 xpt_setup_ccb(&ccb->ccb_h, 739 ccb->ccb_h.path, 740 /*priority*/1); 741 ccb->ccb_h.func_code = XPT_GDEVLIST; 742 743 /* 744 * Basically, the point of this is that we go through 745 * getting the list of devices, until we find a passthrough 746 * device. In the current version of the CAM code, the 747 * only way to determine what type of device we're dealing 748 * with is by its name. 749 */ 750 while (found == 0) { 751 ccb->cgdl.index = 0; 752 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; 753 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) { 754 755 /* we want the next device in the list */ 756 xpt_action(ccb); 757 if (strncmp(ccb->cgdl.periph_name, 758 "pass", 4) == 0){ 759 found = 1; 760 break; 761 } 762 } 763 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) && 764 (found == 0)) { 765 ccb->cgdl.periph_name[0] = '\0'; 766 ccb->cgdl.unit_number = 0; 767 break; 768 } 769 } 770 771 /* copy the result back out */ 772 bcopy(ccb, addr, sizeof(union ccb)); 773 774 /* and release the ccb */ 775 xpt_release_ccb(ccb); 776 777 break; 778 default: 779 error = ENOTTY; 780 break; 781 } 782 return(error); 783 } 784 785 int 786 cam_periph_runccb(union ccb *ccb, 787 int (*error_routine)(union ccb *ccb, 788 cam_flags camflags, 789 u_int32_t sense_flags), 790 cam_flags camflags, u_int32_t sense_flags, 791 struct devstat *ds) 792 { 793 int error; 794 795 error = 0; 796 797 /* 798 * If the user has supplied a stats structure, and if we understand 799 * this particular type of ccb, record the transaction start. 800 */ 801 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 802 devstat_start_transaction(ds); 803 804 xpt_action(ccb); 805 806 do { 807 cam_periph_ccbwait(ccb); 808 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) 809 error = 0; 810 else if (error_routine != NULL) 811 error = (*error_routine)(ccb, camflags, sense_flags); 812 else 813 error = 0; 814 815 } while (error == ERESTART); 816 817 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 818 cam_release_devq(ccb->ccb_h.path, 819 /* relsim_flags */0, 820 /* openings */0, 821 /* timeout */0, 822 /* getcount_only */ FALSE); 823 824 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO)) 825 devstat_end_transaction(ds, 826 ccb->csio.dxfer_len, 827 ccb->csio.tag_action & 0xf, 828 ((ccb->ccb_h.flags & CAM_DIR_MASK) == 829 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 830 (ccb->ccb_h.flags & CAM_DIR_OUT) ? 831 DEVSTAT_WRITE : 832 DEVSTAT_READ); 833 834 return(error); 835 } 836 837 u_int32_t 838 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, 839 u_int32_t openings, u_int32_t timeout, 840 int getcount_only) 841 { 842 struct ccb_relsim crs; 843 844 xpt_setup_ccb(&crs.ccb_h, path, 845 /*priority*/1); 846 crs.ccb_h.func_code = XPT_REL_SIMQ; 847 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0; 848 crs.release_flags = relsim_flags; 849 crs.openings = openings; 850 crs.release_timeout = timeout; 851 xpt_action((union ccb *)&crs); 852 return (crs.qfrozen_cnt); 853 } 854 855 #define saved_ccb_ptr ppriv_ptr0 856 static void 857 camperiphdone(struct cam_periph *periph, union ccb *done_ccb) 858 { 859 cam_status status; 860 int frozen; 861 int sense; 862 struct scsi_start_stop_unit *scsi_cmd; 863 u_int32_t relsim_flags, timeout; 864 u_int32_t qfrozen_cnt; 865 866 status = done_ccb->ccb_h.status; 867 frozen = (status & CAM_DEV_QFRZN) != 0; 868 sense = (status & CAM_AUTOSNS_VALID) != 0; 869 status &= CAM_STATUS_MASK; 870 871 timeout = 0; 872 relsim_flags = 0; 873 874 /* 875 * Unfreeze the queue once if it is already frozen.. 876 */ 877 if (frozen != 0) { 878 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 879 /*relsim_flags*/0, 880 /*openings*/0, 881 /*timeout*/0, 882 /*getcount_only*/0); 883 } 884 885 switch (status) { 886 887 case CAM_REQ_CMP: 888 889 /* 890 * If we have successfully taken a device from the not 891 * ready to ready state, re-scan the device and re-get the 892 * inquiry information. Many devices (mostly disks) don't 893 * properly report their inquiry information unless they 894 * are spun up. 895 */ 896 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) { 897 scsi_cmd = (struct scsi_start_stop_unit *) 898 &done_ccb->csio.cdb_io.cdb_bytes; 899 900 if (scsi_cmd->opcode == START_STOP_UNIT) 901 xpt_async(AC_INQ_CHANGED, 902 done_ccb->ccb_h.path, NULL); 903 } 904 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 905 sizeof(union ccb)); 906 907 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 908 909 xpt_action(done_ccb); 910 911 break; 912 case CAM_SCSI_STATUS_ERROR: 913 scsi_cmd = (struct scsi_start_stop_unit *) 914 &done_ccb->csio.cdb_io.cdb_bytes; 915 if (sense != 0) { 916 struct scsi_sense_data *sense; 917 int error_code, sense_key, asc, ascq; 918 919 sense = &done_ccb->csio.sense_data; 920 scsi_extract_sense(sense, &error_code, 921 &sense_key, &asc, &ascq); 922 923 /* 924 * If the error is "invalid field in CDB", 925 * and the load/eject flag is set, turn the 926 * flag off and try again. This is just in 927 * case the drive in question barfs on the 928 * load eject flag. The CAM code should set 929 * the load/eject flag by default for 930 * removable media. 931 */ 932 933 /* XXX KDM 934 * Should we check to see what the specific 935 * scsi status is?? Or does it not matter 936 * since we already know that there was an 937 * error, and we know what the specific 938 * error code was, and we know what the 939 * opcode is.. 940 */ 941 if ((scsi_cmd->opcode == START_STOP_UNIT) && 942 ((scsi_cmd->how & SSS_LOEJ) != 0) && 943 (asc == 0x24) && (ascq == 0x00) && 944 (done_ccb->ccb_h.retry_count > 0)) { 945 946 scsi_cmd->how &= ~SSS_LOEJ; 947 948 xpt_action(done_ccb); 949 950 } else if (done_ccb->ccb_h.retry_count > 0) { 951 /* 952 * In this case, the error recovery 953 * command failed, but we've got 954 * some retries left on it. Give 955 * it another try. 956 */ 957 958 /* set the timeout to .5 sec */ 959 relsim_flags = 960 RELSIM_RELEASE_AFTER_TIMEOUT; 961 timeout = 500; 962 963 xpt_action(done_ccb); 964 965 break; 966 967 } else { 968 /* 969 * Copy the original CCB back and 970 * send it back to the caller. 971 */ 972 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 973 done_ccb, sizeof(union ccb)); 974 975 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 976 977 xpt_action(done_ccb); 978 } 979 } else { 980 /* 981 * Eh?? The command failed, but we don't 982 * have any sense. What's up with that? 983 * Fire the CCB again to return it to the 984 * caller. 985 */ 986 bcopy(done_ccb->ccb_h.saved_ccb_ptr, 987 done_ccb, sizeof(union ccb)); 988 989 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 990 991 xpt_action(done_ccb); 992 993 } 994 break; 995 default: 996 bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb, 997 sizeof(union ccb)); 998 999 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG; 1000 1001 xpt_action(done_ccb); 1002 1003 break; 1004 } 1005 1006 /* decrement the retry count */ 1007 if (done_ccb->ccb_h.retry_count > 0) 1008 done_ccb->ccb_h.retry_count--; 1009 1010 qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path, 1011 /*relsim_flags*/relsim_flags, 1012 /*openings*/0, 1013 /*timeout*/timeout, 1014 /*getcount_only*/0); 1015 } 1016 1017 /* 1018 * Generic error handler. Peripheral drivers usually filter 1019 * out the errors that they handle in a unique mannor, then 1020 * call this function. 1021 */ 1022 int 1023 cam_periph_error(union ccb *ccb, cam_flags camflags, 1024 u_int32_t sense_flags, union ccb *save_ccb) 1025 { 1026 cam_status status; 1027 int frozen; 1028 int sense; 1029 int error; 1030 int openings; 1031 int retry; 1032 u_int32_t relsim_flags; 1033 u_int32_t timeout; 1034 1035 status = ccb->ccb_h.status; 1036 frozen = (status & CAM_DEV_QFRZN) != 0; 1037 sense = (status & CAM_AUTOSNS_VALID) != 0; 1038 status &= CAM_STATUS_MASK; 1039 relsim_flags = 0; 1040 1041 1042 switch (status) { 1043 case CAM_REQ_CMP: 1044 /* decrement the number of retries */ 1045 retry = ccb->ccb_h.retry_count > 0; 1046 if (retry) 1047 ccb->ccb_h.retry_count--; 1048 error = 0; 1049 break; 1050 case CAM_SCSI_STATUS_ERROR: 1051 1052 switch (ccb->csio.scsi_status) { 1053 case SCSI_STATUS_OK: 1054 case SCSI_STATUS_COND_MET: 1055 case SCSI_STATUS_INTERMED: 1056 case SCSI_STATUS_INTERMED_COND_MET: 1057 error = 0; 1058 break; 1059 case SCSI_STATUS_CMD_TERMINATED: 1060 case SCSI_STATUS_CHECK_COND: 1061 if (sense != 0) { 1062 struct scsi_sense_data *sense; 1063 int error_code, sense_key, asc, ascq; 1064 struct cam_periph *periph; 1065 scsi_sense_action err_action; 1066 struct ccb_getdev cgd; 1067 1068 sense = &ccb->csio.sense_data; 1069 scsi_extract_sense(sense, &error_code, 1070 &sense_key, &asc, &ascq); 1071 periph = xpt_path_periph(ccb->ccb_h.path); 1072 1073 /* 1074 * Grab the inquiry data for this device. 1075 */ 1076 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, 1077 /*priority*/ 1); 1078 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1079 xpt_action((union ccb *)&cgd); 1080 1081 err_action = scsi_error_action(asc, ascq, 1082 &cgd.inq_data); 1083 1084 /* 1085 * Send a Test Unit Ready to the device. 1086 * If the 'many' flag is set, we send 120 1087 * test unit ready commands, one every half 1088 * second. Otherwise, we just send one TUR. 1089 * We only want to do this if the retry 1090 * count has not been exhausted. 1091 */ 1092 if (((err_action & SS_MASK) == SS_TUR) 1093 && save_ccb != NULL 1094 && ccb->ccb_h.retry_count > 0) { 1095 1096 /* 1097 * Since error recovery is already 1098 * in progress, don't attempt to 1099 * process this error. It is probably 1100 * related to the error that caused 1101 * the currently active error recovery 1102 * action. Also, we only have 1103 * space for one saved CCB, so if we 1104 * had two concurrent error recovery 1105 * actions, we would end up 1106 * over-writing one error recovery 1107 * CCB with another one. 1108 */ 1109 if (periph->flags & 1110 CAM_PERIPH_RECOVERY_INPROG) { 1111 error = ERESTART; 1112 break; 1113 } 1114 1115 periph->flags |= 1116 CAM_PERIPH_RECOVERY_INPROG; 1117 1118 /* decrement the number of retries */ 1119 if ((err_action & 1120 SSQ_DECREMENT_COUNT) != 0) { 1121 retry = 1; 1122 ccb->ccb_h.retry_count--; 1123 } 1124 1125 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1126 1127 /* 1128 * We retry this one every half 1129 * second for a minute. If the 1130 * device hasn't become ready in a 1131 * minute's time, it's unlikely to 1132 * ever become ready. If the table 1133 * doesn't specify SSQ_MANY, we can 1134 * only try this once. Oh well. 1135 */ 1136 if ((err_action & SSQ_MANY) != 0) 1137 scsi_test_unit_ready(&ccb->csio, 1138 /*retries*/120, 1139 camperiphdone, 1140 MSG_SIMPLE_Q_TAG, 1141 SSD_FULL_SIZE, 1142 /*timeout*/5000); 1143 else 1144 scsi_test_unit_ready(&ccb->csio, 1145 /*retries*/1, 1146 camperiphdone, 1147 MSG_SIMPLE_Q_TAG, 1148 SSD_FULL_SIZE, 1149 /*timeout*/5000); 1150 1151 /* release the queue after .5 sec. */ 1152 relsim_flags = 1153 RELSIM_RELEASE_AFTER_TIMEOUT; 1154 timeout = 500; 1155 /* 1156 * Drop the priority to 0 so that 1157 * we are the first to execute. Also 1158 * freeze the queue after this command 1159 * is sent so that we can restore the 1160 * old csio and have it queued in the 1161 * proper order before we let normal 1162 * transactions go to the drive. 1163 */ 1164 ccb->ccb_h.pinfo.priority = 0; 1165 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1166 1167 /* 1168 * Save a pointer to the original 1169 * CCB in the new CCB. 1170 */ 1171 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1172 1173 error = ERESTART; 1174 } 1175 /* 1176 * Send a start unit command to the device, 1177 * and then retry the command. We only 1178 * want to do this if the retry count has 1179 * not been exhausted. If the user 1180 * specified 0 retries, then we follow 1181 * their request and do not retry. 1182 */ 1183 else if (((err_action & SS_MASK) == SS_START) 1184 && save_ccb != NULL 1185 && ccb->ccb_h.retry_count > 0) { 1186 int le; 1187 1188 /* 1189 * Only one error recovery action 1190 * at a time. See above. 1191 */ 1192 if (periph->flags & 1193 CAM_PERIPH_RECOVERY_INPROG) { 1194 error = ERESTART; 1195 break; 1196 } 1197 1198 periph->flags |= 1199 CAM_PERIPH_RECOVERY_INPROG; 1200 1201 /* decrement the number of retries */ 1202 retry = 1; 1203 ccb->ccb_h.retry_count--; 1204 1205 /* 1206 * Check for removable media and 1207 * set load/eject flag 1208 * appropriately. 1209 */ 1210 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1211 le = TRUE; 1212 else 1213 le = FALSE; 1214 1215 /* 1216 * Attempt to start the drive up. 1217 * 1218 * Save the current ccb so it can 1219 * be restored and retried once the 1220 * drive is started up. 1221 */ 1222 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1223 1224 scsi_start_stop(&ccb->csio, 1225 /*retries*/1, 1226 camperiphdone, 1227 MSG_SIMPLE_Q_TAG, 1228 /*start*/TRUE, 1229 /*load/eject*/le, 1230 /*immediate*/FALSE, 1231 SSD_FULL_SIZE, 1232 /*timeout*/50000); 1233 /* 1234 * Drop the priority to 0 so that 1235 * we are the first to execute. Also 1236 * freeze the queue after this command 1237 * is sent so that we can restore the 1238 * old csio and have it queued in the 1239 * proper order before we let normal 1240 * transactions go to the drive. 1241 */ 1242 ccb->ccb_h.pinfo.priority = 0; 1243 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1244 1245 /* 1246 * Save a pointer to the original 1247 * CCB in the new CCB. 1248 */ 1249 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1250 1251 error = ERESTART; 1252 } else if ((sense_flags & SF_RETRY_UA) != 0) { 1253 /* 1254 * XXX KDM this is a *horrible* 1255 * hack. 1256 */ 1257 error = scsi_interpret_sense(ccb, 1258 sense_flags, 1259 &relsim_flags, 1260 &openings, 1261 &timeout, 1262 err_action); 1263 } 1264 1265 /* 1266 * Theoretically, this code should send a 1267 * test unit ready to the given device, and 1268 * if it returns and error, send a start 1269 * unit command. Since we don't yet have 1270 * the capability to do two-command error 1271 * recovery, just send a start unit. 1272 * XXX KDM fix this! 1273 */ 1274 else if (((err_action & SS_MASK) == SS_TURSTART) 1275 && save_ccb != NULL 1276 && ccb->ccb_h.retry_count > 0) { 1277 int le; 1278 1279 /* 1280 * Only one error recovery action 1281 * at a time. See above. 1282 */ 1283 if (periph->flags & 1284 CAM_PERIPH_RECOVERY_INPROG) { 1285 error = ERESTART; 1286 break; 1287 } 1288 1289 periph->flags |= 1290 CAM_PERIPH_RECOVERY_INPROG; 1291 1292 /* decrement the number of retries */ 1293 retry = 1; 1294 ccb->ccb_h.retry_count--; 1295 1296 /* 1297 * Check for removable media and 1298 * set load/eject flag 1299 * appropriately. 1300 */ 1301 if (SID_IS_REMOVABLE(&cgd.inq_data)) 1302 le = TRUE; 1303 else 1304 le = FALSE; 1305 1306 /* 1307 * Attempt to start the drive up. 1308 * 1309 * Save the current ccb so it can 1310 * be restored and retried once the 1311 * drive is started up. 1312 */ 1313 bcopy(ccb, save_ccb, sizeof(*save_ccb)); 1314 1315 scsi_start_stop(&ccb->csio, 1316 /*retries*/1, 1317 camperiphdone, 1318 MSG_SIMPLE_Q_TAG, 1319 /*start*/TRUE, 1320 /*load/eject*/le, 1321 /*immediate*/FALSE, 1322 SSD_FULL_SIZE, 1323 /*timeout*/50000); 1324 1325 /* release the queue after .5 sec. */ 1326 relsim_flags = 1327 RELSIM_RELEASE_AFTER_TIMEOUT; 1328 timeout = 500; 1329 /* 1330 * Drop the priority to 0 so that 1331 * we are the first to execute. Also 1332 * freeze the queue after this command 1333 * is sent so that we can restore the 1334 * old csio and have it queued in the 1335 * proper order before we let normal 1336 * transactions go to the drive. 1337 */ 1338 ccb->ccb_h.pinfo.priority = 0; 1339 ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 1340 1341 /* 1342 * Save a pointer to the original 1343 * CCB in the new CCB. 1344 */ 1345 ccb->ccb_h.saved_ccb_ptr = save_ccb; 1346 1347 error = ERESTART; 1348 } else { 1349 error = scsi_interpret_sense(ccb, 1350 sense_flags, 1351 &relsim_flags, 1352 &openings, 1353 &timeout, 1354 err_action); 1355 } 1356 } else if (ccb->csio.scsi_status == 1357 SCSI_STATUS_CHECK_COND) { 1358 /* no point in decrementing the retry count */ 1359 panic("cam_periph_error: scsi status of " 1360 "CHECK COND returned but no sense " 1361 "information is availible. " 1362 "Controller should have returned " 1363 "CAM_AUTOSENSE_FAILED"); 1364 /* NOTREACHED */ 1365 error = EIO; 1366 } else if (ccb->ccb_h.retry_count > 0) { 1367 /* 1368 * XXX KDM shouldn't there be a better 1369 * argument to return?? 1370 */ 1371 error = EIO; 1372 } else { 1373 /* decrement the number of retries */ 1374 retry = ccb->ccb_h.retry_count > 0; 1375 if (retry) 1376 ccb->ccb_h.retry_count--; 1377 /* 1378 * If it was aborted with no 1379 * clue as to the reason, just 1380 * retry it again. 1381 */ 1382 error = ERESTART; 1383 } 1384 break; 1385 case SCSI_STATUS_QUEUE_FULL: 1386 { 1387 /* no decrement */ 1388 struct ccb_getdev cgd; 1389 1390 /* 1391 * First off, find out what the current 1392 * transaction counts are. 1393 */ 1394 xpt_setup_ccb(&cgd.ccb_h, 1395 ccb->ccb_h.path, 1396 /*priority*/1); 1397 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 1398 xpt_action((union ccb *)&cgd); 1399 1400 /* 1401 * If we were the only transaction active, treat 1402 * the QUEUE FULL as if it were a BUSY condition. 1403 */ 1404 if (cgd.dev_active != 0) { 1405 /* 1406 * Reduce the number of openings to 1407 * be 1 less than the amount it took 1408 * to get a queue full bounded by the 1409 * minimum allowed tag count for this 1410 * device. 1411 */ 1412 openings = cgd.dev_active; 1413 if (openings < cgd.mintags) 1414 openings = cgd.mintags; 1415 if (openings < cgd.dev_active+cgd.dev_openings) 1416 relsim_flags = RELSIM_ADJUST_OPENINGS; 1417 else { 1418 /* 1419 * Some devices report queue full for 1420 * temporary resource shortages. For 1421 * this reason, we allow a minimum 1422 * tag count to be entered via a 1423 * quirk entry to prevent the queue 1424 * count on these devices from falling 1425 * to a pessimisticly low value. We 1426 * still wait for the next successful 1427 * completion, however, before queueing 1428 * more transactions to the device. 1429 */ 1430 relsim_flags = 1431 RELSIM_RELEASE_AFTER_CMDCMPLT; 1432 } 1433 timeout = 0; 1434 error = ERESTART; 1435 break; 1436 } 1437 /* FALLTHROUGH */ 1438 } 1439 case SCSI_STATUS_BUSY: 1440 /* 1441 * Restart the queue after either another 1442 * command completes or a 1 second timeout. 1443 */ 1444 /* 1445 * XXX KDM ask JTG about this again, do we need to 1446 * be looking at the retry count here? 1447 */ 1448 error = ERESTART; 1449 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT 1450 | RELSIM_RELEASE_AFTER_CMDCMPLT; 1451 timeout = 1000; 1452 break; 1453 case SCSI_STATUS_RESERV_CONFLICT: 1454 error = EIO; 1455 break; 1456 default: 1457 error = EIO; 1458 break; 1459 } 1460 break; 1461 case CAM_REQ_CMP_ERR: 1462 case CAM_AUTOSENSE_FAIL: 1463 case CAM_CMD_TIMEOUT: 1464 case CAM_UNEXP_BUSFREE: 1465 case CAM_UNCOR_PARITY: 1466 case CAM_DATA_RUN_ERR: 1467 /* decrement the number of retries */ 1468 retry = ccb->ccb_h.retry_count > 0; 1469 if (retry) { 1470 ccb->ccb_h.retry_count--; 1471 error = ERESTART; 1472 } else { 1473 error = EIO; 1474 } 1475 break; 1476 case CAM_UA_ABORT: 1477 case CAM_UA_TERMIO: 1478 case CAM_MSG_REJECT_REC: 1479 /* XXX Don't know that these are correct */ 1480 error = EIO; 1481 break; 1482 case CAM_SEL_TIMEOUT: 1483 { 1484 /* 1485 * XXX 1486 * A single selection timeout should not be enough 1487 * to invalidate a device. We should retry for multiple 1488 * seconds assuming this isn't a probe. We'll probably 1489 * need a special flag for that. 1490 */ 1491 #if 0 1492 struct cam_path *newpath; 1493 1494 /* Should we do more if we can't create the path?? */ 1495 if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path), 1496 xpt_path_path_id(ccb->ccb_h.path), 1497 xpt_path_target_id(ccb->ccb_h.path), 1498 CAM_LUN_WILDCARD) != CAM_REQ_CMP) 1499 break; 1500 /* 1501 * Let peripheral drivers know that this device has gone 1502 * away. 1503 */ 1504 xpt_async(AC_LOST_DEVICE, newpath, NULL); 1505 xpt_free_path(newpath); 1506 #endif 1507 error = ENXIO; 1508 break; 1509 } 1510 case CAM_REQ_INVALID: 1511 case CAM_PATH_INVALID: 1512 case CAM_DEV_NOT_THERE: 1513 case CAM_NO_HBA: 1514 case CAM_PROVIDE_FAIL: 1515 case CAM_REQ_TOO_BIG: 1516 error = EINVAL; 1517 break; 1518 case CAM_SCSI_BUS_RESET: 1519 case CAM_BDR_SENT: 1520 case CAM_REQUEUE_REQ: 1521 /* Unconditional requeue, dammit */ 1522 error = ERESTART; 1523 break; 1524 case CAM_RESRC_UNAVAIL: 1525 case CAM_BUSY: 1526 /* timeout??? */ 1527 default: 1528 /* decrement the number of retries */ 1529 retry = ccb->ccb_h.retry_count > 0; 1530 if (retry) { 1531 ccb->ccb_h.retry_count--; 1532 error = ERESTART; 1533 } else { 1534 /* Check the sense codes */ 1535 error = EIO; 1536 } 1537 break; 1538 } 1539 1540 /* Attempt a retry */ 1541 if (error == ERESTART || error == 0) { 1542 if (frozen != 0) 1543 ccb->ccb_h.status &= ~CAM_DEV_QFRZN; 1544 1545 if (error == ERESTART) 1546 xpt_action(ccb); 1547 1548 if (frozen != 0) { 1549 cam_release_devq(ccb->ccb_h.path, 1550 relsim_flags, 1551 openings, 1552 timeout, 1553 /*getcount_only*/0); 1554 } 1555 } 1556 1557 1558 return (error); 1559 } 1560