scsi_pass.c revision 67882
1/* 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer, 11 * without modification, immediately at the beginning of the file. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: head/sys/cam/scsi/scsi_pass.c 67882 2000-10-29 13:57:19Z phk $ 28 */ 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/types.h> 34#include <sys/bio.h> 35#include <sys/malloc.h> 36#include <sys/fcntl.h> 37#include <sys/stat.h> 38#include <sys/conf.h> 39#include <sys/errno.h> 40#include <sys/devicestat.h> 41 42#include <cam/cam.h> 43#include <cam/cam_ccb.h> 44#include <cam/cam_extend.h> 45#include <cam/cam_periph.h> 46#include <cam/cam_xpt_periph.h> 47#include <cam/cam_debug.h> 48 49#include <cam/scsi/scsi_all.h> 50#include <cam/scsi/scsi_message.h> 51#include <cam/scsi/scsi_da.h> 52#include <cam/scsi/scsi_pass.h> 53 54typedef enum { 55 PASS_FLAG_OPEN = 0x01, 56 PASS_FLAG_LOCKED = 0x02, 57 PASS_FLAG_INVALID = 0x04 58} pass_flags; 59 60typedef enum { 61 PASS_STATE_NORMAL 62} pass_state; 63 64typedef enum { 65 PASS_CCB_BUFFER_IO, 66 PASS_CCB_WAITING 67} pass_ccb_types; 68 69#define ccb_type ppriv_field0 70#define ccb_bp ppriv_ptr1 71 72struct pass_softc { 73 pass_state state; 74 pass_flags flags; 75 u_int8_t pd_type; 76 struct bio_queue_head bio_queue; 77 union ccb saved_ccb; 78 struct devstat device_stats; 79 dev_t dev; 80}; 81 82#ifndef MIN 83#define MIN(x,y) ((x<y) ? x : y) 84#endif 85 86#define PASS_CDEV_MAJOR 31 87 88static d_open_t passopen; 89static d_close_t passclose; 90static d_ioctl_t passioctl; 91static d_strategy_t passstrategy; 92 93static periph_init_t passinit; 94static periph_ctor_t passregister; 95static periph_oninv_t passoninvalidate; 96static periph_dtor_t passcleanup; 97static periph_start_t passstart; 98static void passasync(void *callback_arg, u_int32_t code, 99 struct cam_path *path, void *arg); 100static void passdone(struct cam_periph *periph, 101 union ccb *done_ccb); 102static int passerror(union ccb *ccb, u_int32_t cam_flags, 103 u_int32_t sense_flags); 104static int passsendccb(struct cam_periph *periph, union ccb *ccb, 105 union ccb *inccb); 106 107static struct periph_driver passdriver = 108{ 109 passinit, "pass", 110 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 111}; 112 113DATA_SET(periphdriver_set, passdriver); 114 115static struct cdevsw pass_cdevsw = { 116 /* open */ passopen, 117 /* close */ passclose, 118 /* read */ physread, 119 /* write */ physwrite, 120 /* ioctl */ passioctl, 121 /* poll */ nopoll, 122 /* mmap */ nommap, 123 /* strategy */ passstrategy, 124 /* name */ "pass", 125 /* maj */ PASS_CDEV_MAJOR, 126 /* dump */ nodump, 127 /* psize */ nopsize, 128 /* flags */ 0, 129 /* bmaj */ -1 130}; 131 132static struct extend_array *passperiphs; 133 134static void 135passinit(void) 136{ 137 cam_status status; 138 struct cam_path *path; 139 140 /* 141 * Create our extend array for storing the devices we attach to. 142 */ 143 passperiphs = cam_extend_new(); 144 if (passperiphs == NULL) { 145 printf("passm: Failed to alloc extend array!\n"); 146 return; 147 } 148 149 /* 150 * Install a global async callback. This callback will 151 * receive async callbacks like "new device found". 152 */ 153 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 154 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 155 156 if (status == CAM_REQ_CMP) { 157 struct ccb_setasync csa; 158 159 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 160 csa.ccb_h.func_code = XPT_SASYNC_CB; 161 csa.event_enable = AC_FOUND_DEVICE; 162 csa.callback = passasync; 163 csa.callback_arg = NULL; 164 xpt_action((union ccb *)&csa); 165 status = csa.ccb_h.status; 166 xpt_free_path(path); 167 } 168 169 if (status != CAM_REQ_CMP) { 170 printf("pass: Failed to attach master async callback " 171 "due to status 0x%x!\n", status); 172 } 173 174} 175 176static void 177passoninvalidate(struct cam_periph *periph) 178{ 179 int s; 180 struct pass_softc *softc; 181 struct bio *q_bp; 182 struct ccb_setasync csa; 183 184 softc = (struct pass_softc *)periph->softc; 185 186 /* 187 * De-register any async callbacks. 188 */ 189 xpt_setup_ccb(&csa.ccb_h, periph->path, 190 /* priority */ 5); 191 csa.ccb_h.func_code = XPT_SASYNC_CB; 192 csa.event_enable = 0; 193 csa.callback = passasync; 194 csa.callback_arg = periph; 195 xpt_action((union ccb *)&csa); 196 197 softc->flags |= PASS_FLAG_INVALID; 198 199 /* 200 * Although the oninvalidate() routines are always called at 201 * splsoftcam, we need to be at splbio() here to keep the buffer 202 * queue from being modified while we traverse it. 203 */ 204 s = splbio(); 205 206 /* 207 * Return all queued I/O with ENXIO. 208 * XXX Handle any transactions queued to the card 209 * with XPT_ABORT_CCB. 210 */ 211 while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){ 212 bioq_remove(&softc->bio_queue, q_bp); 213 q_bp->bio_resid = q_bp->bio_bcount; 214 q_bp->bio_error = ENXIO; 215 q_bp->bio_flags |= BIO_ERROR; 216 biodone(q_bp); 217 } 218 splx(s); 219 220 if (bootverbose) { 221 xpt_print_path(periph->path); 222 printf("lost device\n"); 223 } 224 225} 226 227static void 228passcleanup(struct cam_periph *periph) 229{ 230 struct pass_softc *softc; 231 232 softc = (struct pass_softc *)periph->softc; 233 234 devstat_remove_entry(&softc->device_stats); 235 236 destroy_dev(softc->dev); 237 238 cam_extend_release(passperiphs, periph->unit_number); 239 240 if (bootverbose) { 241 xpt_print_path(periph->path); 242 printf("removing device entry\n"); 243 } 244 free(softc, M_DEVBUF); 245} 246 247static void 248passasync(void *callback_arg, u_int32_t code, 249 struct cam_path *path, void *arg) 250{ 251 struct cam_periph *periph; 252 253 periph = (struct cam_periph *)callback_arg; 254 255 switch (code) { 256 case AC_FOUND_DEVICE: 257 { 258 struct ccb_getdev *cgd; 259 cam_status status; 260 261 cgd = (struct ccb_getdev *)arg; 262 263 /* 264 * Allocate a peripheral instance for 265 * this device and start the probe 266 * process. 267 */ 268 status = cam_periph_alloc(passregister, passoninvalidate, 269 passcleanup, passstart, "pass", 270 CAM_PERIPH_BIO, cgd->ccb_h.path, 271 passasync, AC_FOUND_DEVICE, cgd); 272 273 if (status != CAM_REQ_CMP 274 && status != CAM_REQ_INPROG) 275 printf("passasync: Unable to attach new device " 276 "due to status 0x%x\n", status); 277 278 break; 279 } 280 default: 281 cam_periph_async(periph, code, path, arg); 282 break; 283 } 284} 285 286static cam_status 287passregister(struct cam_periph *periph, void *arg) 288{ 289 struct pass_softc *softc; 290 struct ccb_setasync csa; 291 struct ccb_getdev *cgd; 292 293 cgd = (struct ccb_getdev *)arg; 294 if (periph == NULL) { 295 printf("passregister: periph was NULL!!\n"); 296 return(CAM_REQ_CMP_ERR); 297 } 298 299 if (cgd == NULL) { 300 printf("passregister: no getdev CCB, can't register device\n"); 301 return(CAM_REQ_CMP_ERR); 302 } 303 304 softc = (struct pass_softc *)malloc(sizeof(*softc), 305 M_DEVBUF, M_NOWAIT); 306 307 if (softc == NULL) { 308 printf("passregister: Unable to probe new device. " 309 "Unable to allocate softc\n"); 310 return(CAM_REQ_CMP_ERR); 311 } 312 313 bzero(softc, sizeof(*softc)); 314 softc->state = PASS_STATE_NORMAL; 315 softc->pd_type = SID_TYPE(&cgd->inq_data); 316 bioq_init(&softc->bio_queue); 317 318 periph->softc = softc; 319 320 cam_extend_set(passperiphs, periph->unit_number, periph); 321 /* 322 * We pass in 0 for a blocksize, since we don't 323 * know what the blocksize of this device is, if 324 * it even has a blocksize. 325 */ 326 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 327 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 328 softc->pd_type | 329 DEVSTAT_TYPE_IF_SCSI | 330 DEVSTAT_TYPE_PASS, 331 DEVSTAT_PRIORITY_PASS); 332 333 /* Register the device */ 334 softc->dev = make_dev(&pass_cdevsw, periph->unit_number, UID_ROOT, 335 GID_OPERATOR, 0600, "%s%d", periph->periph_name, 336 periph->unit_number); 337 338 /* 339 * Add an async callback so that we get 340 * notified if this device goes away. 341 */ 342 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5); 343 csa.ccb_h.func_code = XPT_SASYNC_CB; 344 csa.event_enable = AC_LOST_DEVICE; 345 csa.callback = passasync; 346 csa.callback_arg = periph; 347 xpt_action((union ccb *)&csa); 348 349 if (bootverbose) 350 xpt_announce_periph(periph, NULL); 351 352 return(CAM_REQ_CMP); 353} 354 355static int 356passopen(dev_t dev, int flags, int fmt, struct proc *p) 357{ 358 struct cam_periph *periph; 359 struct pass_softc *softc; 360 int unit, error; 361 int s; 362 363 error = 0; /* default to no error */ 364 365 /* unit = dkunit(dev); */ 366 /* XXX KDM fix this */ 367 unit = minor(dev) & 0xff; 368 369 periph = cam_extend_get(passperiphs, unit); 370 371 if (periph == NULL) 372 return (ENXIO); 373 374 softc = (struct pass_softc *)periph->softc; 375 376 s = splsoftcam(); 377 if (softc->flags & PASS_FLAG_INVALID) { 378 splx(s); 379 return(ENXIO); 380 } 381 382 /* 383 * Don't allow access when we're running at a high securelvel. 384 */ 385 if (securelevel > 1) { 386 splx(s); 387 return(EPERM); 388 } 389 390 /* 391 * Only allow read-write access. 392 */ 393 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) { 394 splx(s); 395 return(EPERM); 396 } 397 398 /* 399 * We don't allow nonblocking access. 400 */ 401 if ((flags & O_NONBLOCK) != 0) { 402 xpt_print_path(periph->path); 403 printf("can't do nonblocking accesss\n"); 404 splx(s); 405 return(EINVAL); 406 } 407 408 if ((error = cam_periph_lock(periph, PRIBIO | PCATCH)) != 0) { 409 splx(s); 410 return (error); 411 } 412 413 splx(s); 414 415 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 416 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 417 return(ENXIO); 418 softc->flags |= PASS_FLAG_OPEN; 419 } 420 421 cam_periph_unlock(periph); 422 423 return (error); 424} 425 426static int 427passclose(dev_t dev, int flag, int fmt, struct proc *p) 428{ 429 struct cam_periph *periph; 430 struct pass_softc *softc; 431 int unit, error; 432 433 /* unit = dkunit(dev); */ 434 /* XXX KDM fix this */ 435 unit = minor(dev) & 0xff; 436 437 periph = cam_extend_get(passperiphs, unit); 438 if (periph == NULL) 439 return (ENXIO); 440 441 softc = (struct pass_softc *)periph->softc; 442 443 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 444 return (error); 445 446 softc->flags &= ~PASS_FLAG_OPEN; 447 448 cam_periph_unlock(periph); 449 cam_periph_release(periph); 450 451 return (0); 452} 453 454/* 455 * Actually translate the requested transfer into one the physical driver 456 * can understand. The transfer is described by a buf and will include 457 * only one physical transfer. 458 */ 459static void 460passstrategy(struct bio *bp) 461{ 462 struct cam_periph *periph; 463 struct pass_softc *softc; 464 u_int unit; 465 int s; 466 467 /* 468 * The read/write interface for the passthrough driver doesn't 469 * really work right now. So, we just pass back EINVAL to tell the 470 * user to go away. 471 */ 472 bp->bio_error = EINVAL; 473 goto bad; 474 475 /* unit = dkunit(bp->bio_dev); */ 476 /* XXX KDM fix this */ 477 unit = minor(bp->bio_dev) & 0xff; 478 479 periph = cam_extend_get(passperiphs, unit); 480 if (periph == NULL) { 481 bp->bio_error = ENXIO; 482 goto bad; 483 } 484 softc = (struct pass_softc *)periph->softc; 485 486 /* 487 * Odd number of bytes or negative offset 488 */ 489 /* valid request? */ 490 if (bp->bio_blkno < 0) { 491 bp->bio_error = EINVAL; 492 goto bad; 493 } 494 495 /* 496 * Mask interrupts so that the pack cannot be invalidated until 497 * after we are in the queue. Otherwise, we might not properly 498 * clean up one of the buffers. 499 */ 500 s = splbio(); 501 502 bioq_insert_tail(&softc->bio_queue, bp); 503 504 splx(s); 505 506 /* 507 * Schedule ourselves for performing the work. 508 */ 509 xpt_schedule(periph, /* XXX priority */1); 510 511 return; 512bad: 513 bp->bio_flags |= BIO_ERROR; 514 515 /* 516 * Correctly set the buf to indicate a completed xfer 517 */ 518 bp->bio_resid = bp->bio_bcount; 519 biodone(bp); 520 return; 521} 522 523static void 524passstart(struct cam_periph *periph, union ccb *start_ccb) 525{ 526 struct pass_softc *softc; 527 int s; 528 529 softc = (struct pass_softc *)periph->softc; 530 531 switch (softc->state) { 532 case PASS_STATE_NORMAL: 533 { 534 struct bio *bp; 535 536 s = splbio(); 537 bp = bioq_first(&softc->bio_queue); 538 if (periph->immediate_priority <= periph->pinfo.priority) { 539 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 540 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 541 periph_links.sle); 542 periph->immediate_priority = CAM_PRIORITY_NONE; 543 splx(s); 544 wakeup(&periph->ccb_list); 545 } else if (bp == NULL) { 546 splx(s); 547 xpt_release_ccb(start_ccb); 548 } else { 549 550 bioq_remove(&softc->bio_queue, bp); 551 552 devstat_start_transaction(&softc->device_stats); 553 554 /* 555 * XXX JGibbs - 556 * Interpret the contents of the bp as a CCB 557 * and pass it to a routine shared by our ioctl 558 * code and passtart. 559 * For now, just biodone it with EIO so we don't 560 * hang. 561 */ 562 bp->bio_error = EIO; 563 bp->bio_flags |= BIO_ERROR; 564 bp->bio_resid = bp->bio_bcount; 565 biodone(bp); 566 bp = bioq_first(&softc->bio_queue); 567 splx(s); 568 569 xpt_action(start_ccb); 570 571 } 572 if (bp != NULL) { 573 /* Have more work to do, so ensure we stay scheduled */ 574 xpt_schedule(periph, /* XXX priority */1); 575 } 576 break; 577 } 578 } 579} 580static void 581passdone(struct cam_periph *periph, union ccb *done_ccb) 582{ 583 struct pass_softc *softc; 584 struct ccb_scsiio *csio; 585 586 softc = (struct pass_softc *)periph->softc; 587 csio = &done_ccb->csio; 588 switch (csio->ccb_h.ccb_type) { 589 case PASS_CCB_BUFFER_IO: 590 { 591 struct bio *bp; 592 cam_status status; 593 u_int8_t scsi_status; 594 devstat_trans_flags ds_flags; 595 596 status = done_ccb->ccb_h.status; 597 scsi_status = done_ccb->csio.scsi_status; 598 bp = (struct bio *)done_ccb->ccb_h.ccb_bp; 599 /* XXX handle errors */ 600 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 601 && (scsi_status == SCSI_STATUS_OK))) { 602 int error; 603 604 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 605 /* 606 * A retry was scheuled, so 607 * just return. 608 */ 609 return; 610 } 611 612 /* 613 * XXX unfreeze the queue after we complete 614 * the abort process 615 */ 616 bp->bio_error = error; 617 bp->bio_flags |= BIO_ERROR; 618 } 619 620 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 621 ds_flags = DEVSTAT_READ; 622 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 623 ds_flags = DEVSTAT_WRITE; 624 else 625 ds_flags = DEVSTAT_NO_DATA; 626 627 devstat_end_transaction_bio(&softc->device_stats, bp); 628 biodone(bp); 629 break; 630 } 631 case PASS_CCB_WAITING: 632 { 633 /* Caller will release the CCB */ 634 wakeup(&done_ccb->ccb_h.cbfcnp); 635 return; 636 } 637 } 638 xpt_release_ccb(done_ccb); 639} 640 641static int 642passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 643{ 644 struct cam_periph *periph; 645 struct pass_softc *softc; 646 u_int8_t unit; 647 int error; 648 649 650 /* unit = dkunit(dev); */ 651 /* XXX KDM fix this */ 652 unit = minor(dev) & 0xff; 653 654 periph = cam_extend_get(passperiphs, unit); 655 656 if (periph == NULL) 657 return(ENXIO); 658 659 softc = (struct pass_softc *)periph->softc; 660 661 error = 0; 662 663 switch (cmd) { 664 665 case CAMIOCOMMAND: 666 { 667 union ccb *inccb; 668 union ccb *ccb; 669 int ccb_malloced; 670 671 inccb = (union ccb *)addr; 672 673 /* 674 * Some CCB types, like scan bus and scan lun can only go 675 * through the transport layer device. 676 */ 677 if (inccb->ccb_h.func_code & XPT_FC_XPT_ONLY) { 678 xpt_print_path(periph->path); 679 printf("CCB function code %#x is restricted to the " 680 "XPT device\n", inccb->ccb_h.func_code); 681 error = ENODEV; 682 break; 683 } 684 685 /* 686 * Non-immediate CCBs need a CCB from the per-device pool 687 * of CCBs, which is scheduled by the transport layer. 688 * Immediate CCBs and user-supplied CCBs should just be 689 * malloced. 690 */ 691 if ((inccb->ccb_h.func_code & XPT_FC_QUEUED) 692 && ((inccb->ccb_h.func_code & XPT_FC_USER_CCB) == 0)) { 693 ccb = cam_periph_getccb(periph, 694 inccb->ccb_h.pinfo.priority); 695 ccb_malloced = 0; 696 } else { 697 ccb = xpt_alloc_ccb(); 698 699 if (ccb != NULL) 700 xpt_setup_ccb(&ccb->ccb_h, periph->path, 701 inccb->ccb_h.pinfo.priority); 702 ccb_malloced = 1; 703 } 704 705 if (ccb == NULL) { 706 xpt_print_path(periph->path); 707 printf("unable to allocate CCB\n"); 708 error = ENOMEM; 709 break; 710 } 711 712 error = passsendccb(periph, ccb, inccb); 713 714 if (ccb_malloced) 715 xpt_free_ccb(ccb); 716 else 717 xpt_release_ccb(ccb); 718 719 break; 720 } 721 default: 722 error = cam_periph_ioctl(periph, cmd, addr, passerror); 723 break; 724 } 725 726 return(error); 727} 728 729/* 730 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 731 * should be the CCB that is copied in from the user. 732 */ 733static int 734passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 735{ 736 struct pass_softc *softc; 737 struct cam_periph_map_info mapinfo; 738 int error, need_unmap; 739 740 softc = (struct pass_softc *)periph->softc; 741 742 need_unmap = 0; 743 744 /* 745 * There are some fields in the CCB header that need to be 746 * preserved, the rest we get from the user. 747 */ 748 xpt_merge_ccb(ccb, inccb); 749 750 /* 751 * There's no way for the user to have a completion 752 * function, so we put our own completion function in here. 753 */ 754 ccb->ccb_h.cbfcnp = passdone; 755 756 /* 757 * We only attempt to map the user memory into kernel space 758 * if they haven't passed in a physical memory pointer, 759 * and if there is actually an I/O operation to perform. 760 * Right now cam_periph_mapmem() only supports SCSI and device 761 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 762 * there's actually data to map. cam_periph_mapmem() will do the 763 * right thing, even if there isn't data to map, but since CCBs 764 * without data are a reasonably common occurance (e.g. test unit 765 * ready), it will save a few cycles if we check for it here. 766 */ 767 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 768 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 769 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 770 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 771 772 bzero(&mapinfo, sizeof(mapinfo)); 773 774 error = cam_periph_mapmem(ccb, &mapinfo); 775 776 /* 777 * cam_periph_mapmem returned an error, we can't continue. 778 * Return the error to the user. 779 */ 780 if (error) 781 return(error); 782 783 /* 784 * We successfully mapped the memory in, so we need to 785 * unmap it when the transaction is done. 786 */ 787 need_unmap = 1; 788 } 789 790 /* 791 * If the user wants us to perform any error recovery, then honor 792 * that request. Otherwise, it's up to the user to perform any 793 * error recovery. 794 */ 795 error = cam_periph_runccb(ccb, 796 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 797 passerror : NULL, 798 /* cam_flags */ 0, 799 /* sense_flags */SF_RETRY_UA | SF_RETRY_SELTO, 800 &softc->device_stats); 801 802 if (need_unmap != 0) 803 cam_periph_unmapmem(ccb, &mapinfo); 804 805 ccb->ccb_h.cbfcnp = NULL; 806 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 807 bcopy(ccb, inccb, sizeof(union ccb)); 808 809 return(error); 810} 811 812static int 813passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 814{ 815 struct cam_periph *periph; 816 struct pass_softc *softc; 817 818 periph = xpt_path_periph(ccb->ccb_h.path); 819 softc = (struct pass_softc *)periph->softc; 820 821 return(cam_periph_error(ccb, cam_flags, sense_flags, 822 &softc->saved_ccb)); 823} 824