scsi_pass.c revision 40603
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 1.3 1998/10/15 17:46:26 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/errno.h> 46#include <sys/devicestat.h> 47 48#include <cam/cam.h> 49#include <cam/cam_ccb.h> 50#include <cam/cam_extend.h> 51#include <cam/cam_periph.h> 52#include <cam/cam_xpt_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_da.h> 58#include <cam/scsi/scsi_pass.h> 59 60typedef enum { 61 PASS_FLAG_OPEN = 0x01, 62 PASS_FLAG_LOCKED = 0x02, 63 PASS_FLAG_INVALID = 0x04 64} pass_flags; 65 66typedef enum { 67 PASS_STATE_NORMAL 68} pass_state; 69 70typedef enum { 71 PASS_CCB_BUFFER_IO, 72 PASS_CCB_WAITING 73} pass_ccb_types; 74 75#define ccb_type ppriv_field0 76#define ccb_bp ppriv_ptr1 77 78struct pass_softc { 79 pass_state state; 80 pass_flags flags; 81 u_int8_t pd_type; 82 struct buf_queue_head buf_queue; 83 union ccb saved_ccb; 84 struct devstat device_stats; 85#ifdef DEVFS 86 void *pass_devfs_token; 87 void *ctl_devfs_token; 88#endif 89}; 90 91#ifndef MIN 92#define MIN(x,y) ((x<y) ? x : y) 93#endif 94 95#define PASS_CDEV_MAJOR 31 96 97static d_open_t passopen; 98static d_read_t passread; 99static d_write_t passwrite; 100static d_close_t passclose; 101static d_ioctl_t passioctl; 102static d_strategy_t passstrategy; 103 104static periph_init_t passinit; 105static periph_ctor_t passregister; 106static periph_oninv_t passoninvalidate; 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 200passoninvalidate(struct cam_periph *periph) 201{ 202 int s; 203 struct pass_softc *softc; 204 struct buf *q_bp; 205 struct ccb_setasync csa; 206 207 softc = (struct pass_softc *)periph->softc; 208 209 /* 210 * De-register any async callbacks. 211 */ 212 xpt_setup_ccb(&csa.ccb_h, periph->path, 213 /* priority */ 5); 214 csa.ccb_h.func_code = XPT_SASYNC_CB; 215 csa.event_enable = 0; 216 csa.callback = passasync; 217 csa.callback_arg = periph; 218 xpt_action((union ccb *)&csa); 219 220 softc->flags |= PASS_FLAG_INVALID; 221 222 /* 223 * Although the oninvalidate() routines are always called at 224 * splsoftcam, we need to be at splbio() here to keep the buffer 225 * queue from being modified while we traverse it. 226 */ 227 s = splbio(); 228 229 /* 230 * Return all queued I/O with ENXIO. 231 * XXX Handle any transactions queued to the card 232 * with XPT_ABORT_CCB. 233 */ 234 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 235 bufq_remove(&softc->buf_queue, q_bp); 236 q_bp->b_resid = q_bp->b_bcount; 237 q_bp->b_error = ENXIO; 238 q_bp->b_flags |= B_ERROR; 239 biodone(q_bp); 240 } 241 splx(s); 242 243 if (bootverbose) { 244 xpt_print_path(periph->path); 245 printf("lost device\n"); 246 } 247 248} 249 250static void 251passcleanup(struct cam_periph *periph) 252{ 253 struct pass_softc *softc; 254 255 softc = (struct pass_softc *)periph->softc; 256 257 devstat_remove_entry(&softc->device_stats); 258 259 cam_extend_release(passperiphs, periph->unit_number); 260 261 if (bootverbose) { 262 xpt_print_path(periph->path); 263 printf("removing device entry\n"); 264 } 265 free(softc, M_DEVBUF); 266} 267 268static void 269passasync(void *callback_arg, u_int32_t code, 270 struct cam_path *path, void *arg) 271{ 272 struct cam_periph *periph; 273 274 periph = (struct cam_periph *)callback_arg; 275 276 switch (code) { 277 case AC_FOUND_DEVICE: 278 { 279 struct ccb_getdev *cgd; 280 cam_status status; 281 282 cgd = (struct ccb_getdev *)arg; 283 284 /* 285 * Allocate a peripheral instance for 286 * this device and start the probe 287 * process. 288 */ 289 status = cam_periph_alloc(passregister, passoninvalidate, 290 passcleanup, passstart, "pass", 291 CAM_PERIPH_BIO, cgd->ccb_h.path, 292 passasync, AC_FOUND_DEVICE, cgd); 293 294 if (status != CAM_REQ_CMP 295 && status != CAM_REQ_INPROG) 296 printf("passasync: Unable to attach new device " 297 "due to status 0x%x\n", status); 298 299 break; 300 } 301 case AC_LOST_DEVICE: 302 cam_periph_invalidate(periph); 303 break; 304 case AC_TRANSFER_NEG: 305 case AC_SENT_BDR: 306 case AC_SCSI_AEN: 307 case AC_UNSOL_RESEL: 308 case AC_BUS_RESET: 309 default: 310 break; 311 } 312} 313 314static cam_status 315passregister(struct cam_periph *periph, void *arg) 316{ 317 struct pass_softc *softc; 318 struct ccb_setasync csa; 319 struct ccb_getdev *cgd; 320 321 cgd = (struct ccb_getdev *)arg; 322 if (periph == NULL) { 323 printf("passregister: periph was NULL!!\n"); 324 return(CAM_REQ_CMP_ERR); 325 } 326 327 if (cgd == NULL) { 328 printf("passregister: no getdev CCB, can't register device\n"); 329 return(CAM_REQ_CMP_ERR); 330 } 331 332 softc = (struct pass_softc *)malloc(sizeof(*softc), 333 M_DEVBUF, M_NOWAIT); 334 335 if (softc == NULL) { 336 printf("passregister: Unable to probe new device. " 337 "Unable to allocate softc\n"); 338 return(CAM_REQ_CMP_ERR); 339 } 340 341 bzero(softc, sizeof(*softc)); 342 softc->state = PASS_STATE_NORMAL; 343 softc->pd_type = cgd->pd_type; 344 bufq_init(&softc->buf_queue); 345 346 periph->softc = softc; 347 348 cam_extend_set(passperiphs, periph->unit_number, periph); 349 /* 350 * We pass in 0 for a blocksize, since we don't 351 * know what the blocksize of this device is, if 352 * it even has a blocksize. 353 */ 354 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 355 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 356 cgd->pd_type | 357 DEVSTAT_TYPE_IF_SCSI | 358 DEVSTAT_TYPE_PASS); 359 /* 360 * Add an async callback so that we get 361 * notified if this device goes away. 362 */ 363 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5); 364 csa.ccb_h.func_code = XPT_SASYNC_CB; 365 csa.event_enable = AC_LOST_DEVICE; 366 csa.callback = passasync; 367 csa.callback_arg = periph; 368 xpt_action((union ccb *)&csa); 369 370 if (bootverbose) 371 xpt_announce_periph(periph, NULL); 372 373 return(CAM_REQ_CMP); 374} 375 376static int 377passopen(dev_t dev, int flags, int fmt, struct proc *p) 378{ 379 struct cam_periph *periph; 380 struct pass_softc *softc; 381 int unit, error; 382 int s; 383 384 error = 0; /* default to no error */ 385 386 /* unit = dkunit(dev); */ 387 /* XXX KDM fix this */ 388 unit = minor(dev) & 0xff; 389 390 periph = cam_extend_get(passperiphs, unit); 391 392 if (periph == NULL) 393 return (ENXIO); 394 395 softc = (struct pass_softc *)periph->softc; 396 397 s = splsoftcam(); 398 if (softc->flags & PASS_FLAG_INVALID) { 399 splx(s); 400 return(ENXIO); 401 } 402 splx(s); 403 404 /* 405 * Only allow read-write access. 406 */ 407 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 408 return(EPERM); 409 410 /* 411 * We don't allow nonblocking access. 412 */ 413 if ((flags & O_NONBLOCK) != 0) { 414 printf("%s%d: can't do nonblocking accesss\n", 415 periph->periph_name, 416 periph->unit_number); 417 return(ENODEV); 418 } 419 420 if ((error = cam_periph_lock(periph, PRIBIO | PCATCH)) != 0) 421 return (error); 422 423 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 424 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 425 return(ENXIO); 426 softc->flags |= PASS_FLAG_OPEN; 427 } 428 429 cam_periph_unlock(periph); 430 431 return (error); 432} 433 434static int 435passclose(dev_t dev, int flag, int fmt, struct proc *p) 436{ 437 struct cam_periph *periph; 438 struct pass_softc *softc; 439 int unit, error; 440 441 /* unit = dkunit(dev); */ 442 /* XXX KDM fix this */ 443 unit = minor(dev) & 0xff; 444 445 periph = cam_extend_get(passperiphs, unit); 446 if (periph == NULL) 447 return (ENXIO); 448 449 softc = (struct pass_softc *)periph->softc; 450 451 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 452 return (error); 453 454 softc->flags &= ~PASS_FLAG_OPEN; 455 456 cam_periph_unlock(periph); 457 cam_periph_release(periph); 458 459 return (0); 460} 461 462static int 463passread(dev_t dev, struct uio *uio, int ioflag) 464{ 465 return(physio(passstrategy, NULL, dev, 1, minphys, uio)); 466} 467 468static int 469passwrite(dev_t dev, struct uio *uio, int ioflag) 470{ 471 return(physio(passstrategy, NULL, dev, 0, minphys, uio)); 472} 473 474/* 475 * Actually translate the requested transfer into one the physical driver 476 * can understand. The transfer is described by a buf and will include 477 * only one physical transfer. 478 */ 479static void 480passstrategy(struct buf *bp) 481{ 482 struct cam_periph *periph; 483 struct pass_softc *softc; 484 u_int unit; 485 int s; 486 487 /* 488 * The read/write interface for the passthrough driver doesn't 489 * really work right now. So, we just pass back EINVAL to tell the 490 * user to go away. 491 */ 492 bp->b_error = EINVAL; 493 goto bad; 494 495 /* unit = dkunit(bp->b_dev); */ 496 /* XXX KDM fix this */ 497 unit = minor(bp->b_dev) & 0xff; 498 499 periph = cam_extend_get(passperiphs, unit); 500 if (periph == NULL) { 501 bp->b_error = ENXIO; 502 goto bad; 503 } 504 softc = (struct pass_softc *)periph->softc; 505 506 /* 507 * Odd number of bytes or negative offset 508 */ 509 /* valid request? */ 510 if (bp->b_blkno < 0) { 511 bp->b_error = EINVAL; 512 goto bad; 513 } 514 515 /* 516 * Mask interrupts so that the pack cannot be invalidated until 517 * after we are in the queue. Otherwise, we might not properly 518 * clean up one of the buffers. 519 */ 520 s = splbio(); 521 522 bufq_insert_tail(&softc->buf_queue, bp); 523 524 splx(s); 525 526 /* 527 * Schedule ourselves for performing the work. 528 */ 529 xpt_schedule(periph, /* XXX priority */1); 530 531 return; 532bad: 533 bp->b_flags |= B_ERROR; 534 535 /* 536 * Correctly set the buf to indicate a completed xfer 537 */ 538 bp->b_resid = bp->b_bcount; 539 biodone(bp); 540 return; 541} 542 543static void 544passstart(struct cam_periph *periph, union ccb *start_ccb) 545{ 546 struct pass_softc *softc; 547 int s; 548 549 softc = (struct pass_softc *)periph->softc; 550 551 switch (softc->state) { 552 case PASS_STATE_NORMAL: 553 { 554 struct buf *bp; 555 556 s = splbio(); 557 bp = bufq_first(&softc->buf_queue); 558 if (periph->immediate_priority <= periph->pinfo.priority) { 559 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 560 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 561 periph_links.sle); 562 periph->immediate_priority = CAM_PRIORITY_NONE; 563 splx(s); 564 wakeup(&periph->ccb_list); 565 } else if (bp == NULL) { 566 splx(s); 567 xpt_release_ccb(start_ccb); 568 } else { 569 570 bufq_remove(&softc->buf_queue, bp); 571 572 devstat_start_transaction(&softc->device_stats); 573 574 /* 575 * XXX JGibbs - 576 * Interpret the contents of the bp as a CCB 577 * and pass it to a routine shared by our ioctl 578 * code and passtart. 579 * For now, just biodone it with EIO so we don't 580 * hang. 581 */ 582 bp->b_error = EIO; 583 bp->b_flags |= B_ERROR; 584 bp->b_resid = bp->b_bcount; 585 biodone(bp); 586 bp = bufq_first(&softc->buf_queue); 587 splx(s); 588 589 xpt_action(start_ccb); 590 591 } 592 if (bp != NULL) { 593 /* Have more work to do, so ensure we stay scheduled */ 594 xpt_schedule(periph, /* XXX priority */1); 595 } 596 break; 597 } 598 } 599} 600static void 601passdone(struct cam_periph *periph, union ccb *done_ccb) 602{ 603 struct pass_softc *softc; 604 struct ccb_scsiio *csio; 605 606 softc = (struct pass_softc *)periph->softc; 607 csio = &done_ccb->csio; 608 switch (csio->ccb_h.ccb_type) { 609 case PASS_CCB_BUFFER_IO: 610 { 611 struct buf *bp; 612 cam_status status; 613 u_int8_t scsi_status; 614 devstat_trans_flags ds_flags; 615 616 status = done_ccb->ccb_h.status; 617 scsi_status = done_ccb->csio.scsi_status; 618 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 619 /* XXX handle errors */ 620 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 621 && (scsi_status == SCSI_STATUS_OK))) { 622 int error; 623 624 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 625 /* 626 * A retry was scheuled, so 627 * just return. 628 */ 629 return; 630 } 631 632 /* 633 * XXX unfreeze the queue after we complete 634 * the abort process 635 */ 636 bp->b_error = error; 637 bp->b_flags |= B_ERROR; 638 } 639 640 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 641 ds_flags = DEVSTAT_READ; 642 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 643 ds_flags = DEVSTAT_WRITE; 644 else 645 ds_flags = DEVSTAT_NO_DATA; 646 647 devstat_end_transaction(&softc->device_stats, bp->b_bcount, 648 done_ccb->csio.tag_action & 0xf, 649 ds_flags); 650 651 biodone(bp); 652 break; 653 } 654 case PASS_CCB_WAITING: 655 { 656 /* Caller will release the CCB */ 657 wakeup(&done_ccb->ccb_h.cbfcnp); 658 return; 659 } 660 } 661 xpt_release_ccb(done_ccb); 662} 663 664static int 665passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 666{ 667 struct cam_periph *periph; 668 struct pass_softc *softc; 669 u_int8_t unit; 670 int error; 671 672 673 /* unit = dkunit(dev); */ 674 /* XXX KDM fix this */ 675 unit = minor(dev) & 0xff; 676 677 periph = cam_extend_get(passperiphs, unit); 678 679 if (periph == NULL) 680 return(ENXIO); 681 682 softc = (struct pass_softc *)periph->softc; 683 684 error = 0; 685 686 switch (cmd) { 687 688 case CAMIOCOMMAND: 689 { 690 union ccb *inccb; 691 union ccb *ccb; 692 693 inccb = (union ccb *)addr; 694 ccb = cam_periph_getccb(periph, inccb->ccb_h.pinfo.priority); 695 696 error = passsendccb(periph, ccb, inccb); 697 698 xpt_release_ccb(ccb); 699 700 break; 701 } 702 default: 703 error = cam_periph_ioctl(periph, cmd, addr, passerror); 704 break; 705 } 706 707 return(error); 708} 709 710/* 711 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 712 * should be the CCB that is copied in from the user. 713 */ 714static int 715passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 716{ 717 struct pass_softc *softc; 718 struct cam_periph_map_info mapinfo; 719 int error, need_unmap; 720 721 softc = (struct pass_softc *)periph->softc; 722 723 need_unmap = 0; 724 725 /* 726 * There are some fields in the CCB header that need to be 727 * preserved, the rest we get from the user. 728 */ 729 xpt_merge_ccb(ccb, inccb); 730 731 /* 732 * There's no way for the user to have a completion 733 * function, so we put our own completion function in here. 734 */ 735 ccb->ccb_h.cbfcnp = passdone; 736 737 /* 738 * We only attempt to map the user memory into kernel space 739 * if they haven't passed in a physical memory pointer, 740 * and if there is actually an I/O operation to perform. 741 * Right now cam_periph_mapmem() only supports SCSI and device 742 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 743 * there's actually data to map. cam_periph_mapmem() will do the 744 * right thing, even if there isn't data to map, but since CCBs 745 * without data are a reasonably common occurance (e.g. test unit 746 * ready), it will save a few cycles if we check for it here. 747 */ 748 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 749 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 750 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 751 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 752 753 bzero(&mapinfo, sizeof(mapinfo)); 754 755 error = cam_periph_mapmem(ccb, &mapinfo); 756 757 /* 758 * cam_periph_mapmem returned an error, we can't continue. 759 * Return the error to the user. 760 */ 761 if (error) 762 return(error); 763 764 /* 765 * We successfully mapped the memory in, so we need to 766 * unmap it when the transaction is done. 767 */ 768 need_unmap = 1; 769 } 770 771 /* 772 * If the user wants us to perform any error recovery, then honor 773 * that request. Otherwise, it's up to the user to perform any 774 * error recovery. 775 */ 776 error = cam_periph_runccb(ccb, 777 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 778 passerror : NULL, 779 /* cam_flags */ 0, 780 /* sense_flags */SF_RETRY_UA, 781 &softc->device_stats); 782 783 if (need_unmap != 0) 784 cam_periph_unmapmem(ccb, &mapinfo); 785 786 ccb->ccb_h.cbfcnp = NULL; 787 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 788 bcopy(ccb, inccb, sizeof(union ccb)); 789 790 return(error); 791} 792 793static int 794passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 795{ 796 struct cam_periph *periph; 797 struct pass_softc *softc; 798 799 periph = xpt_path_periph(ccb->ccb_h.path); 800 softc = (struct pass_softc *)periph->softc; 801 802 return(cam_periph_error(ccb, cam_flags, sense_flags, 803 &softc->saved_ccb)); 804} 805