scsi_pass.c revision 40398
1/* 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * Copyright (c) 1997, 1998 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 * $Id: scsi_pass.c,v 1.2 1998/09/16 00:11:53 ken Exp $ 28 */ 29 30#include <sys/param.h> 31#include <sys/queue.h> 32#include <sys/systm.h> 33#include <sys/kernel.h> 34#include <sys/types.h> 35#include <sys/buf.h> 36#include <sys/dkbad.h> 37#include <sys/disklabel.h> 38#include <sys/diskslice.h> 39#include <sys/malloc.h> 40#include <sys/fcntl.h> 41#include <sys/stat.h> 42#include <sys/conf.h> 43#include <sys/buf.h> 44#include <sys/proc.h> 45#include <sys/cdio.h> 46#include <sys/errno.h> 47#include <sys/devicestat.h> 48 49#include <cam/cam.h> 50#include <cam/cam_ccb.h> 51#include <cam/cam_extend.h> 52#include <cam/cam_periph.h> 53#include <cam/cam_xpt_periph.h> 54#include <cam/cam_debug.h> 55 56#include <cam/scsi/scsi_all.h> 57#include <cam/scsi/scsi_message.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/scsi/scsi_pass.h> 60 61typedef enum { 62 PASS_FLAG_OPEN = 0x01, 63 PASS_FLAG_LOCKED = 0x02, 64 PASS_FLAG_INVALID = 0x04 65} pass_flags; 66 67typedef enum { 68 PASS_STATE_NORMAL 69} pass_state; 70 71typedef enum { 72 PASS_CCB_BUFFER_IO, 73 PASS_CCB_WAITING 74} pass_ccb_types; 75 76#define ccb_type ppriv_field0 77#define ccb_bp ppriv_ptr1 78 79struct pass_softc { 80 pass_state state; 81 pass_flags flags; 82 u_int8_t pd_type; 83 struct buf_queue_head buf_queue; 84 union ccb saved_ccb; 85 struct devstat device_stats; 86#ifdef DEVFS 87 void *pass_devfs_token; 88 void *ctl_devfs_token; 89#endif 90}; 91 92#ifndef MIN 93#define MIN(x,y) ((x<y) ? x : y) 94#endif 95 96#define PASS_CDEV_MAJOR 31 97 98static d_open_t passopen; 99static d_read_t passread; 100static d_write_t passwrite; 101static d_close_t passclose; 102static d_ioctl_t passioctl; 103static d_strategy_t passstrategy; 104 105static periph_init_t passinit; 106static periph_ctor_t passregister; 107static periph_dtor_t passcleanup; 108static periph_start_t passstart; 109static void passasync(void *callback_arg, u_int32_t code, 110 struct cam_path *path, void *arg); 111static void passdone(struct cam_periph *periph, 112 union ccb *done_ccb); 113static int passerror(union ccb *ccb, u_int32_t cam_flags, 114 u_int32_t sense_flags); 115static int passsendccb(struct cam_periph *periph, union ccb *ccb, 116 union ccb *inccb); 117 118static struct periph_driver passdriver = 119{ 120 passinit, "pass", 121 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 122}; 123 124DATA_SET(periphdriver_set, passdriver); 125 126static struct cdevsw pass_cdevsw = 127{ 128 /*d_open*/ passopen, 129 /*d_close*/ passclose, 130 /*d_read*/ passread, 131 /*d_write*/ passwrite, 132 /*d_ioctl*/ passioctl, 133 /*d_stop*/ nostop, 134 /*d_reset*/ noreset, 135 /*d_devtotty*/ nodevtotty, 136 /*d_poll*/ seltrue, 137 /*d_mmap*/ nommap, 138 /*d_strategy*/ passstrategy, 139 /*d_name*/ "pass", 140 /*d_spare*/ NULL, 141 /*d_maj*/ -1, 142 /*d_dump*/ nodump, 143 /*d_psize*/ nopsize, 144 /*d_flags*/ 0, 145 /*d_maxio*/ 0, 146 /*b_maj*/ -1 147}; 148 149static struct extend_array *passperiphs; 150 151static void 152passinit(void) 153{ 154 cam_status status; 155 struct cam_path *path; 156 157 /* 158 * Create our extend array for storing the devices we attach to. 159 */ 160 passperiphs = cam_extend_new(); 161 if (passperiphs == NULL) { 162 printf("passm: Failed to alloc extend array!\n"); 163 return; 164 } 165 166 /* 167 * Install a global async callback. This callback will 168 * receive async callbacks like "new device found". 169 */ 170 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 171 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 172 173 if (status == CAM_REQ_CMP) { 174 struct ccb_setasync csa; 175 176 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 177 csa.ccb_h.func_code = XPT_SASYNC_CB; 178 csa.event_enable = AC_FOUND_DEVICE; 179 csa.callback = passasync; 180 csa.callback_arg = NULL; 181 xpt_action((union ccb *)&csa); 182 status = csa.ccb_h.status; 183 xpt_free_path(path); 184 } 185 186 if (status != CAM_REQ_CMP) { 187 printf("pass: Failed to attach master async callback " 188 "due to status 0x%x!\n", status); 189 } else { 190 dev_t dev; 191 192 /* If we were successfull, register our devsw */ 193 dev = makedev(PASS_CDEV_MAJOR, 0); 194 cdevsw_add(&dev, &pass_cdevsw, NULL); 195 } 196 197} 198 199static void 200passcleanup(struct cam_periph *periph) 201{ 202 cam_extend_release(passperiphs, periph->unit_number); 203 204 if (bootverbose) { 205 xpt_print_path(periph->path); 206 printf("removing device entry\n"); 207 } 208 free(periph->softc, M_DEVBUF); 209} 210 211static void 212passasync(void *callback_arg, u_int32_t code, 213 struct cam_path *path, void *arg) 214{ 215 struct cam_periph *periph; 216 217 periph = (struct cam_periph *)callback_arg; 218 219 switch (code) { 220 case AC_FOUND_DEVICE: 221 { 222 struct ccb_getdev *cgd; 223 cam_status status; 224 225 cgd = (struct ccb_getdev *)arg; 226 227 /* 228 * Allocate a peripheral instance for 229 * this device and start the probe 230 * process. 231 */ 232 status = cam_periph_alloc(passregister, passcleanup, passstart, 233 "pass", CAM_PERIPH_BIO, 234 cgd->ccb_h.path, passasync, 235 AC_FOUND_DEVICE, cgd); 236 237 if (status != CAM_REQ_CMP 238 && status != CAM_REQ_INPROG) 239 printf("passasync: Unable to attach new device " 240 "due to status 0x%x\n", status); 241 242 break; 243 } 244 case AC_LOST_DEVICE: 245 { 246 int s; 247 struct pass_softc *softc; 248 struct buf *q_bp; 249 struct ccb_setasync csa; 250 251 softc = (struct pass_softc *)periph->softc; 252 253 /* 254 * Insure that no other async callbacks that 255 * might affect this peripheral can come through. 256 */ 257 s = splcam(); 258 259 /* 260 * De-register any async callbacks. 261 */ 262 xpt_setup_ccb(&csa.ccb_h, periph->path, 263 /* priority */ 5); 264 csa.ccb_h.func_code = XPT_SASYNC_CB; 265 csa.event_enable = 0; 266 csa.callback = passasync; 267 csa.callback_arg = periph; 268 xpt_action((union ccb *)&csa); 269 270 softc->flags |= PASS_FLAG_INVALID; 271 272 /* 273 * Return all queued I/O with ENXIO. 274 * XXX Handle any transactions queued to the card 275 * with XPT_ABORT_CCB. 276 */ 277 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 278 bufq_remove(&softc->buf_queue, q_bp); 279 q_bp->b_resid = q_bp->b_bcount; 280 q_bp->b_error = ENXIO; 281 q_bp->b_flags |= B_ERROR; 282 biodone(q_bp); 283 } 284 devstat_remove_entry(&softc->device_stats); 285 286 if (bootverbose) { 287 xpt_print_path(periph->path); 288 printf("lost device\n"); 289 } 290 291 splx(s); 292 293 cam_periph_invalidate(periph); 294 break; 295 } 296 case AC_TRANSFER_NEG: 297 case AC_SENT_BDR: 298 case AC_SCSI_AEN: 299 case AC_UNSOL_RESEL: 300 case AC_BUS_RESET: 301 default: 302 break; 303 } 304} 305 306static cam_status 307passregister(struct cam_periph *periph, void *arg) 308{ 309 struct pass_softc *softc; 310 struct ccb_setasync csa; 311 struct ccb_getdev *cgd; 312 313 cgd = (struct ccb_getdev *)arg; 314 if (periph == NULL) { 315 printf("passregister: periph was NULL!!\n"); 316 return(CAM_REQ_CMP_ERR); 317 } 318 319 if (cgd == NULL) { 320 printf("passregister: no getdev CCB, can't register device\n"); 321 return(CAM_REQ_CMP_ERR); 322 } 323 324 softc = (struct pass_softc *)malloc(sizeof(*softc), 325 M_DEVBUF, M_NOWAIT); 326 327 if (softc == NULL) { 328 printf("passregister: Unable to probe new device. " 329 "Unable to allocate softc\n"); 330 return(CAM_REQ_CMP_ERR); 331 } 332 333 bzero(softc, sizeof(*softc)); 334 softc->state = PASS_STATE_NORMAL; 335 softc->pd_type = cgd->pd_type; 336 bufq_init(&softc->buf_queue); 337 338 periph->softc = softc; 339 340 cam_extend_set(passperiphs, periph->unit_number, periph); 341 /* 342 * We pass in 0 for a blocksize, since we don't 343 * know what the blocksize of this device is, if 344 * it even has a blocksize. 345 */ 346 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 347 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 348 cgd->pd_type | 349 DEVSTAT_TYPE_IF_SCSI | 350 DEVSTAT_TYPE_PASS); 351 /* 352 * Add an async callback so that we get 353 * notified if this device goes away. 354 */ 355 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5); 356 csa.ccb_h.func_code = XPT_SASYNC_CB; 357 csa.event_enable = AC_LOST_DEVICE; 358 csa.callback = passasync; 359 csa.callback_arg = periph; 360 xpt_action((union ccb *)&csa); 361 362 if (bootverbose) 363 xpt_announce_periph(periph, NULL); 364 365 return(CAM_REQ_CMP); 366} 367 368static int 369passopen(dev_t dev, int flags, int fmt, struct proc *p) 370{ 371 struct cam_periph *periph; 372 struct pass_softc *softc; 373 int unit, error; 374 375 error = 0; /* default to no error */ 376 377 /* unit = dkunit(dev); */ 378 /* XXX KDM fix this */ 379 unit = minor(dev) & 0xff; 380 381 periph = cam_extend_get(passperiphs, unit); 382 383 if (periph == NULL) 384 return (ENXIO); 385 386 softc = (struct pass_softc *)periph->softc; 387 388 if (softc->flags & PASS_FLAG_INVALID) 389 return(ENXIO); 390 391 /* 392 * Only allow read-write access. 393 */ 394 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 395 return(EPERM); 396 397 /* 398 * We don't allow nonblocking access. 399 */ 400 if ((flags & O_NONBLOCK) != 0) { 401 printf("%s%d: can't do nonblocking accesss\n", 402 periph->periph_name, 403 periph->unit_number); 404 return(ENODEV); 405 } 406 407 if ((error = cam_periph_lock(periph, PRIBIO | PCATCH)) != 0) 408 return (error); 409 410 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 411 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 412 return(ENXIO); 413 softc->flags |= PASS_FLAG_OPEN; 414 } 415 416 cam_periph_unlock(periph); 417 418 return (error); 419} 420 421static int 422passclose(dev_t dev, int flag, int fmt, struct proc *p) 423{ 424 struct cam_periph *periph; 425 struct pass_softc *softc; 426 int unit, error; 427 428 /* unit = dkunit(dev); */ 429 /* XXX KDM fix this */ 430 unit = minor(dev) & 0xff; 431 432 periph = cam_extend_get(passperiphs, unit); 433 if (periph == NULL) 434 return (ENXIO); 435 436 softc = (struct pass_softc *)periph->softc; 437 438 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 439 return (error); 440 441 softc->flags &= ~PASS_FLAG_OPEN; 442 443 cam_periph_unlock(periph); 444 cam_periph_release(periph); 445 446 return (0); 447} 448 449static int 450passread(dev_t dev, struct uio *uio, int ioflag) 451{ 452 return(physio(passstrategy, NULL, dev, 1, minphys, uio)); 453} 454 455static int 456passwrite(dev_t dev, struct uio *uio, int ioflag) 457{ 458 return(physio(passstrategy, NULL, dev, 0, minphys, uio)); 459} 460 461/* 462 * Actually translate the requested transfer into one the physical driver 463 * can understand. The transfer is described by a buf and will include 464 * only one physical transfer. 465 */ 466static void 467passstrategy(struct buf *bp) 468{ 469 struct cam_periph *periph; 470 struct pass_softc *softc; 471 u_int unit; 472 int s; 473 474 /* 475 * The read/write interface for the passthrough driver doesn't 476 * really work right now. So, we just pass back EINVAL to tell the 477 * user to go away. 478 */ 479 bp->b_error = EINVAL; 480 goto bad; 481 482 /* unit = dkunit(bp->b_dev); */ 483 /* XXX KDM fix this */ 484 unit = minor(bp->b_dev) & 0xff; 485 486 periph = cam_extend_get(passperiphs, unit); 487 if (periph == NULL) { 488 bp->b_error = ENXIO; 489 goto bad; 490 } 491 softc = (struct pass_softc *)periph->softc; 492 493 /* 494 * Odd number of bytes or negative offset 495 */ 496 /* valid request? */ 497 if (bp->b_blkno < 0) { 498 bp->b_error = EINVAL; 499 goto bad; 500 } 501 502 /* 503 * Mask interrupts so that the pack cannot be invalidated until 504 * after we are in the queue. Otherwise, we might not properly 505 * clean up one of the buffers. 506 */ 507 s = splbio(); 508 509 bufq_insert_tail(&softc->buf_queue, bp); 510 511 splx(s); 512 513 /* 514 * Schedule ourselves for performing the work. 515 */ 516 xpt_schedule(periph, /* XXX priority */1); 517 518 return; 519bad: 520 bp->b_flags |= B_ERROR; 521 522 /* 523 * Correctly set the buf to indicate a completed xfer 524 */ 525 bp->b_resid = bp->b_bcount; 526 biodone(bp); 527 return; 528} 529 530static void 531passstart(struct cam_periph *periph, union ccb *start_ccb) 532{ 533 struct pass_softc *softc; 534 int s; 535 536 softc = (struct pass_softc *)periph->softc; 537 538 switch (softc->state) { 539 case PASS_STATE_NORMAL: 540 { 541 struct buf *bp; 542 543 s = splbio(); 544 bp = bufq_first(&softc->buf_queue); 545 if (periph->immediate_priority <= periph->pinfo.priority) { 546 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 547 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 548 periph_links.sle); 549 periph->immediate_priority = CAM_PRIORITY_NONE; 550 splx(s); 551 wakeup(&periph->ccb_list); 552 } else if (bp == NULL) { 553 splx(s); 554 xpt_release_ccb(start_ccb); 555 } else { 556 557 bufq_remove(&softc->buf_queue, bp); 558 559 devstat_start_transaction(&softc->device_stats); 560 561 /* 562 * XXX JGibbs - 563 * Interpret the contents of the bp as a CCB 564 * and pass it to a routine shared by our ioctl 565 * code and passtart. 566 * For now, just biodone it with EIO so we don't 567 * hang. 568 */ 569 bp->b_error = EIO; 570 bp->b_flags |= B_ERROR; 571 bp->b_resid = bp->b_bcount; 572 biodone(bp); 573 bp = bufq_first(&softc->buf_queue); 574 splx(s); 575 576 xpt_action(start_ccb); 577 578 } 579 if (bp != NULL) { 580 /* Have more work to do, so ensure we stay scheduled */ 581 xpt_schedule(periph, /* XXX priority */1); 582 } 583 break; 584 } 585 } 586} 587static void 588passdone(struct cam_periph *periph, union ccb *done_ccb) 589{ 590 struct pass_softc *softc; 591 struct ccb_scsiio *csio; 592 593 softc = (struct pass_softc *)periph->softc; 594 csio = &done_ccb->csio; 595 switch (csio->ccb_h.ccb_type) { 596 case PASS_CCB_BUFFER_IO: 597 { 598 struct buf *bp; 599 cam_status status; 600 u_int8_t scsi_status; 601 devstat_trans_flags ds_flags; 602 603 status = done_ccb->ccb_h.status; 604 scsi_status = done_ccb->csio.scsi_status; 605 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 606 /* XXX handle errors */ 607 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 608 && (scsi_status == SCSI_STATUS_OK))) { 609 int error; 610 611 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 612 /* 613 * A retry was scheuled, so 614 * just return. 615 */ 616 return; 617 } 618 619 /* 620 * XXX unfreeze the queue after we complete 621 * the abort process 622 */ 623 bp->b_error = error; 624 bp->b_flags |= B_ERROR; 625 } 626 627 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 628 ds_flags = DEVSTAT_READ; 629 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 630 ds_flags = DEVSTAT_WRITE; 631 else 632 ds_flags = DEVSTAT_NO_DATA; 633 634 devstat_end_transaction(&softc->device_stats, bp->b_bcount, 635 done_ccb->csio.tag_action & 0xf, 636 ds_flags); 637 638 biodone(bp); 639 break; 640 } 641 case PASS_CCB_WAITING: 642 { 643 /* Caller will release the CCB */ 644 wakeup(&done_ccb->ccb_h.cbfcnp); 645 return; 646 } 647 } 648 xpt_release_ccb(done_ccb); 649} 650 651static int 652passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 653{ 654 struct cam_periph *periph; 655 struct pass_softc *softc; 656 u_int8_t unit; 657 int error; 658 659 660 /* unit = dkunit(dev); */ 661 /* XXX KDM fix this */ 662 unit = minor(dev) & 0xff; 663 664 periph = cam_extend_get(passperiphs, unit); 665 666 if (periph == NULL) 667 return(ENXIO); 668 669 softc = (struct pass_softc *)periph->softc; 670 671 error = 0; 672 673 switch (cmd) { 674 675 case CAMIOCOMMAND: 676 { 677 union ccb *inccb; 678 union ccb *ccb; 679 680 inccb = (union ccb *)addr; 681 ccb = cam_periph_getccb(periph, inccb->ccb_h.pinfo.priority); 682 683 error = passsendccb(periph, ccb, inccb); 684 685 xpt_release_ccb(ccb); 686 687 break; 688 } 689 default: 690 error = cam_periph_ioctl(periph, cmd, addr, passerror); 691 break; 692 } 693 694 return(error); 695} 696 697/* 698 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 699 * should be the CCB that is copied in from the user. 700 */ 701static int 702passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 703{ 704 struct pass_softc *softc; 705 struct cam_periph_map_info mapinfo; 706 int error, need_unmap; 707 708 softc = (struct pass_softc *)periph->softc; 709 710 need_unmap = 0; 711 712 /* 713 * There are some fields in the CCB header that need to be 714 * preserved, the rest we get from the user. 715 */ 716 xpt_merge_ccb(ccb, inccb); 717 718 /* 719 * There's no way for the user to have a completion 720 * function, so we put our own completion function in here. 721 */ 722 ccb->ccb_h.cbfcnp = passdone; 723 724 /* 725 * We only attempt to map the user memory into kernel space 726 * if they haven't passed in a physical memory pointer, 727 * and if there is actually an I/O operation to perform. 728 * Right now cam_periph_mapmem() only supports SCSI and device 729 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 730 * there's actually data to map. cam_periph_mapmem() will do the 731 * right thing, even if there isn't data to map, but since CCBs 732 * without data are a reasonably common occurance (e.g. test unit 733 * ready), it will save a few cycles if we check for it here. 734 */ 735 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 736 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 737 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 738 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 739 740 bzero(&mapinfo, sizeof(mapinfo)); 741 742 error = cam_periph_mapmem(ccb, &mapinfo); 743 744 /* 745 * cam_periph_mapmem returned an error, we can't continue. 746 * Return the error to the user. 747 */ 748 if (error) 749 return(error); 750 751 /* 752 * We successfully mapped the memory in, so we need to 753 * unmap it when the transaction is done. 754 */ 755 need_unmap = 1; 756 } 757 758 /* 759 * If the user wants us to perform any error recovery, then honor 760 * that request. Otherwise, it's up to the user to perform any 761 * error recovery. 762 */ 763 error = cam_periph_runccb(ccb, 764 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 765 passerror : NULL, 766 /* cam_flags */ 0, 767 /* sense_flags */SF_RETRY_UA, 768 &softc->device_stats); 769 770 if (need_unmap != 0) 771 cam_periph_unmapmem(ccb, &mapinfo); 772 773 ccb->ccb_h.cbfcnp = NULL; 774 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 775 bcopy(ccb, inccb, sizeof(union ccb)); 776 777 return(error); 778} 779 780static int 781passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 782{ 783 struct cam_periph *periph; 784 struct pass_softc *softc; 785 786 periph = xpt_path_periph(ccb->ccb_h.path); 787 softc = (struct pass_softc *)periph->softc; 788 789 return(cam_periph_error(ccb, cam_flags, sense_flags, 790 &softc->saved_ccb)); 791} 792