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: src/sys/cam/scsi/scsi_pass.c,v 1.19 2000/01/17 06:27:37 mjacob Exp $ 28 * $DragonFly: src/sys/bus/cam/scsi/scsi_pass.c,v 1.13 2005/06/02 20:40:31 dillon Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/types.h> 35 #include <sys/buf.h> 36 #include <sys/malloc.h> 37 #include <sys/fcntl.h> 38 #include <sys/stat.h> 39 #include <sys/conf.h> 40 #include <sys/buf.h> 41 #include <sys/proc.h> 42 #include <sys/errno.h> 43 #include <sys/devicestat.h> 44 #include <sys/proc.h> 45 #include <sys/buf2.h> 46 #include <sys/thread2.h> 47 48 #include "../cam.h" 49 #include "../cam_ccb.h" 50 #include "../cam_extend.h" 51 #include "../cam_periph.h" 52 #include "../cam_xpt_periph.h" 53 #include "../cam_debug.h" 54 55 #include "scsi_all.h" 56 #include "scsi_message.h" 57 #include "scsi_da.h" 58 #include "scsi_pass.h" 59 60 typedef enum { 61 PASS_FLAG_OPEN = 0x01, 62 PASS_FLAG_LOCKED = 0x02, 63 PASS_FLAG_INVALID = 0x04 64 } pass_flags; 65 66 typedef enum { 67 PASS_STATE_NORMAL 68 } pass_state; 69 70 typedef 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 78 struct 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 }; 86 87 #define PASS_CDEV_MAJOR 31 88 89 static d_open_t passopen; 90 static d_close_t passclose; 91 static d_ioctl_t passioctl; 92 static d_strategy_t passstrategy; 93 94 static periph_init_t passinit; 95 static periph_ctor_t passregister; 96 static periph_oninv_t passoninvalidate; 97 static periph_dtor_t passcleanup; 98 static periph_start_t passstart; 99 static void passasync(void *callback_arg, u_int32_t code, 100 struct cam_path *path, void *arg); 101 static void passdone(struct cam_periph *periph, 102 union ccb *done_ccb); 103 static int passerror(union ccb *ccb, u_int32_t cam_flags, 104 u_int32_t sense_flags); 105 static int passsendccb(struct cam_periph *periph, union ccb *ccb, 106 union ccb *inccb); 107 108 static struct periph_driver passdriver = 109 { 110 passinit, "pass", 111 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 112 }; 113 114 DATA_SET(periphdriver_set, passdriver); 115 116 static struct cdevsw pass_cdevsw = { 117 /* name */ "pass", 118 /* maj */ PASS_CDEV_MAJOR, 119 /* flags */ 0, 120 /* port */ NULL, 121 /* clone */ NULL, 122 123 /* open */ passopen, 124 /* close */ passclose, 125 /* read */ physread, 126 /* write */ physwrite, 127 /* ioctl */ passioctl, 128 /* poll */ nopoll, 129 /* mmap */ nommap, 130 /* strategy */ passstrategy, 131 /* dump */ nodump, 132 /* psize */ nopsize 133 }; 134 135 static struct extend_array *passperiphs; 136 137 static void 138 passinit(void) 139 { 140 cam_status status; 141 struct cam_path *path; 142 143 /* 144 * Create our extend array for storing the devices we attach to. 145 */ 146 passperiphs = cam_extend_new(); 147 if (passperiphs == NULL) { 148 printf("passm: Failed to alloc extend array!\n"); 149 return; 150 } 151 152 /* 153 * Install a global async callback. This callback will 154 * receive async callbacks like "new device found". 155 */ 156 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 157 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 158 159 if (status == CAM_REQ_CMP) { 160 struct ccb_setasync csa; 161 162 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 163 csa.ccb_h.func_code = XPT_SASYNC_CB; 164 csa.event_enable = AC_FOUND_DEVICE; 165 csa.callback = passasync; 166 csa.callback_arg = NULL; 167 xpt_action((union ccb *)&csa); 168 status = csa.ccb_h.status; 169 xpt_free_path(path); 170 } 171 172 if (status != CAM_REQ_CMP) { 173 printf("pass: Failed to attach master async callback " 174 "due to status 0x%x!\n", status); 175 } 176 177 } 178 179 static void 180 passoninvalidate(struct cam_periph *periph) 181 { 182 struct pass_softc *softc; 183 struct buf *q_bp; 184 struct ccb_setasync csa; 185 186 softc = (struct pass_softc *)periph->softc; 187 188 /* 189 * De-register any async callbacks. 190 */ 191 xpt_setup_ccb(&csa.ccb_h, periph->path, 192 /* priority */ 5); 193 csa.ccb_h.func_code = XPT_SASYNC_CB; 194 csa.event_enable = 0; 195 csa.callback = passasync; 196 csa.callback_arg = periph; 197 xpt_action((union ccb *)&csa); 198 199 softc->flags |= PASS_FLAG_INVALID; 200 201 /* 202 * We need to be in a critical section here to keep the buffer 203 * queue from being modified while we traverse it. 204 */ 205 crit_enter(); 206 207 /* 208 * Return all queued I/O with ENXIO. 209 * XXX Handle any transactions queued to the card 210 * with XPT_ABORT_CCB. 211 */ 212 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 213 bufq_remove(&softc->buf_queue, q_bp); 214 q_bp->b_resid = q_bp->b_bcount; 215 q_bp->b_error = ENXIO; 216 q_bp->b_flags |= B_ERROR; 217 biodone(q_bp); 218 } 219 crit_exit(); 220 221 if (bootverbose) { 222 xpt_print_path(periph->path); 223 printf("lost device\n"); 224 } 225 226 } 227 228 static void 229 passcleanup(struct cam_periph *periph) 230 { 231 struct pass_softc *softc; 232 233 softc = (struct pass_softc *)periph->softc; 234 235 devstat_remove_entry(&softc->device_stats); 236 237 cam_extend_release(passperiphs, periph->unit_number); 238 239 if (bootverbose) { 240 xpt_print_path(periph->path); 241 printf("removing device entry\n"); 242 } 243 cdevsw_remove(&pass_cdevsw, -1, periph->unit_number); 244 free(softc, M_DEVBUF); 245 } 246 247 static void 248 passasync(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 } 285 286 static cam_status 287 passregister(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 = malloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO); 305 softc->state = PASS_STATE_NORMAL; 306 softc->pd_type = SID_TYPE(&cgd->inq_data); 307 bufq_init(&softc->buf_queue); 308 309 periph->softc = softc; 310 311 cam_extend_set(passperiphs, periph->unit_number, periph); 312 /* 313 * We pass in 0 for a blocksize, since we don't 314 * know what the blocksize of this device is, if 315 * it even has a blocksize. 316 */ 317 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 318 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 319 softc->pd_type | 320 DEVSTAT_TYPE_IF_SCSI | 321 DEVSTAT_TYPE_PASS, 322 DEVSTAT_PRIORITY_PASS); 323 324 /* Register the device */ 325 cdevsw_add(&pass_cdevsw, -1, periph->unit_number); 326 make_dev(&pass_cdevsw, periph->unit_number, UID_ROOT, 327 GID_OPERATOR, 0600, "%s%d", periph->periph_name, 328 periph->unit_number); 329 330 /* 331 * Add an async callback so that we get 332 * notified if this device goes away. 333 */ 334 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5); 335 csa.ccb_h.func_code = XPT_SASYNC_CB; 336 csa.event_enable = AC_LOST_DEVICE; 337 csa.callback = passasync; 338 csa.callback_arg = periph; 339 xpt_action((union ccb *)&csa); 340 341 if (bootverbose) 342 xpt_announce_periph(periph, NULL); 343 344 return(CAM_REQ_CMP); 345 } 346 347 static int 348 passopen(dev_t dev, int flags, int fmt, struct thread *td) 349 { 350 struct cam_periph *periph; 351 struct pass_softc *softc; 352 int unit, error; 353 354 error = 0; /* default to no error */ 355 356 /* unit = dkunit(dev); */ 357 /* XXX KDM fix this */ 358 unit = minor(dev) & 0xff; 359 360 periph = cam_extend_get(passperiphs, unit); 361 362 if (periph == NULL) 363 return (ENXIO); 364 365 softc = (struct pass_softc *)periph->softc; 366 367 crit_enter(); 368 if (softc->flags & PASS_FLAG_INVALID) { 369 crit_exit(); 370 return(ENXIO); 371 } 372 373 /* 374 * Don't allow access when we're running at a high securelvel. 375 */ 376 if (securelevel > 1) { 377 crit_exit(); 378 return(EPERM); 379 } 380 381 /* 382 * Only allow read-write access. 383 */ 384 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) { 385 crit_exit(); 386 return(EPERM); 387 } 388 389 /* 390 * We don't allow nonblocking access. 391 */ 392 if ((flags & O_NONBLOCK) != 0) { 393 xpt_print_path(periph->path); 394 printf("can't do nonblocking accesss\n"); 395 crit_exit(); 396 return(EINVAL); 397 } 398 399 if ((error = cam_periph_lock(periph, PCATCH)) != 0) { 400 crit_exit(); 401 return (error); 402 } 403 404 crit_exit(); 405 406 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 407 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 408 return(ENXIO); 409 softc->flags |= PASS_FLAG_OPEN; 410 } 411 412 cam_periph_unlock(periph); 413 414 return (error); 415 } 416 417 static int 418 passclose(dev_t dev, int flag, int fmt, struct thread *td) 419 { 420 struct cam_periph *periph; 421 struct pass_softc *softc; 422 int unit, error; 423 424 /* unit = dkunit(dev); */ 425 /* XXX KDM fix this */ 426 unit = minor(dev) & 0xff; 427 428 periph = cam_extend_get(passperiphs, unit); 429 if (periph == NULL) 430 return (ENXIO); 431 432 softc = (struct pass_softc *)periph->softc; 433 434 if ((error = cam_periph_lock(periph, 0)) != 0) 435 return (error); 436 437 softc->flags &= ~PASS_FLAG_OPEN; 438 439 cam_periph_unlock(periph); 440 cam_periph_release(periph); 441 442 return (0); 443 } 444 445 /* 446 * Actually translate the requested transfer into one the physical driver 447 * can understand. The transfer is described by a buf and will include 448 * only one physical transfer. 449 */ 450 static void 451 passstrategy(struct buf *bp) 452 { 453 struct cam_periph *periph; 454 struct pass_softc *softc; 455 u_int unit; 456 457 /* 458 * The read/write interface for the passthrough driver doesn't 459 * really work right now. So, we just pass back EINVAL to tell the 460 * user to go away. 461 */ 462 bp->b_error = EINVAL; 463 goto bad; 464 465 /* unit = dkunit(bp->b_dev); */ 466 /* XXX KDM fix this */ 467 unit = minor(bp->b_dev) & 0xff; 468 469 periph = cam_extend_get(passperiphs, unit); 470 if (periph == NULL) { 471 bp->b_error = ENXIO; 472 goto bad; 473 } 474 softc = (struct pass_softc *)periph->softc; 475 476 /* 477 * Odd number of bytes or negative offset 478 */ 479 /* valid request? */ 480 if (bp->b_blkno < 0) { 481 bp->b_error = EINVAL; 482 goto bad; 483 } 484 485 /* 486 * Mask interrupts so that the pack cannot be invalidated until 487 * after we are in the queue. Otherwise, we might not properly 488 * clean up one of the buffers. 489 */ 490 crit_enter(); 491 bufq_insert_tail(&softc->buf_queue, bp); 492 crit_exit(); 493 494 /* 495 * Schedule ourselves for performing the work. 496 */ 497 xpt_schedule(periph, /* XXX priority */1); 498 499 return; 500 bad: 501 bp->b_flags |= B_ERROR; 502 503 /* 504 * Correctly set the buf to indicate a completed xfer 505 */ 506 bp->b_resid = bp->b_bcount; 507 biodone(bp); 508 return; 509 } 510 511 static void 512 passstart(struct cam_periph *periph, union ccb *start_ccb) 513 { 514 struct pass_softc *softc; 515 516 softc = (struct pass_softc *)periph->softc; 517 518 switch (softc->state) { 519 case PASS_STATE_NORMAL: 520 { 521 struct buf *bp; 522 523 crit_enter(); 524 bp = bufq_first(&softc->buf_queue); 525 if (periph->immediate_priority <= periph->pinfo.priority) { 526 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 527 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 528 periph_links.sle); 529 periph->immediate_priority = CAM_PRIORITY_NONE; 530 crit_exit(); 531 wakeup(&periph->ccb_list); 532 } else if (bp == NULL) { 533 crit_exit(); 534 xpt_release_ccb(start_ccb); 535 } else { 536 537 bufq_remove(&softc->buf_queue, bp); 538 539 devstat_start_transaction(&softc->device_stats); 540 541 /* 542 * XXX JGibbs - 543 * Interpret the contents of the bp as a CCB 544 * and pass it to a routine shared by our ioctl 545 * code and passtart. 546 * For now, just biodone it with EIO so we don't 547 * hang. 548 */ 549 bp->b_error = EIO; 550 bp->b_flags |= B_ERROR; 551 bp->b_resid = bp->b_bcount; 552 biodone(bp); 553 bp = bufq_first(&softc->buf_queue); 554 crit_exit(); 555 556 xpt_action(start_ccb); 557 558 } 559 if (bp != NULL) { 560 /* Have more work to do, so ensure we stay scheduled */ 561 xpt_schedule(periph, /* XXX priority */1); 562 } 563 break; 564 } 565 } 566 } 567 static void 568 passdone(struct cam_periph *periph, union ccb *done_ccb) 569 { 570 struct pass_softc *softc; 571 struct ccb_scsiio *csio; 572 573 softc = (struct pass_softc *)periph->softc; 574 csio = &done_ccb->csio; 575 switch (csio->ccb_h.ccb_type) { 576 case PASS_CCB_BUFFER_IO: 577 { 578 struct buf *bp; 579 cam_status status; 580 u_int8_t scsi_status; 581 devstat_trans_flags ds_flags; 582 583 status = done_ccb->ccb_h.status; 584 scsi_status = done_ccb->csio.scsi_status; 585 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 586 /* XXX handle errors */ 587 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 588 && (scsi_status == SCSI_STATUS_OK))) { 589 int error; 590 591 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 592 /* 593 * A retry was scheuled, so 594 * just return. 595 */ 596 return; 597 } 598 599 /* 600 * XXX unfreeze the queue after we complete 601 * the abort process 602 */ 603 bp->b_error = error; 604 bp->b_flags |= B_ERROR; 605 } 606 607 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 608 ds_flags = DEVSTAT_READ; 609 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 610 ds_flags = DEVSTAT_WRITE; 611 else 612 ds_flags = DEVSTAT_NO_DATA; 613 614 devstat_end_transaction_buf(&softc->device_stats, bp); 615 biodone(bp); 616 break; 617 } 618 case PASS_CCB_WAITING: 619 { 620 /* Caller will release the CCB */ 621 wakeup(&done_ccb->ccb_h.cbfcnp); 622 return; 623 } 624 } 625 xpt_release_ccb(done_ccb); 626 } 627 628 static int 629 passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 630 { 631 struct cam_periph *periph; 632 struct pass_softc *softc; 633 u_int8_t unit; 634 int error; 635 636 637 /* unit = dkunit(dev); */ 638 /* XXX KDM fix this */ 639 unit = minor(dev) & 0xff; 640 641 periph = cam_extend_get(passperiphs, unit); 642 643 if (periph == NULL) 644 return(ENXIO); 645 646 softc = (struct pass_softc *)periph->softc; 647 648 error = 0; 649 650 switch (cmd) { 651 652 case CAMIOCOMMAND: 653 { 654 union ccb *inccb; 655 union ccb *ccb; 656 int ccb_malloced; 657 658 inccb = (union ccb *)addr; 659 660 /* 661 * Some CCB types, like scan bus and scan lun can only go 662 * through the transport layer device. 663 */ 664 if (inccb->ccb_h.func_code & XPT_FC_XPT_ONLY) { 665 xpt_print_path(periph->path); 666 printf("CCB function code %#x is restricted to the " 667 "XPT device\n", inccb->ccb_h.func_code); 668 error = ENODEV; 669 break; 670 } 671 672 /* 673 * Non-immediate CCBs need a CCB from the per-device pool 674 * of CCBs, which is scheduled by the transport layer. 675 * Immediate CCBs and user-supplied CCBs should just be 676 * malloced. 677 */ 678 if ((inccb->ccb_h.func_code & XPT_FC_QUEUED) 679 && ((inccb->ccb_h.func_code & XPT_FC_USER_CCB) == 0)) { 680 ccb = cam_periph_getccb(periph, 681 inccb->ccb_h.pinfo.priority); 682 ccb_malloced = 0; 683 } else { 684 ccb = xpt_alloc_ccb(); 685 686 if (ccb != NULL) 687 xpt_setup_ccb(&ccb->ccb_h, periph->path, 688 inccb->ccb_h.pinfo.priority); 689 ccb_malloced = 1; 690 } 691 692 if (ccb == NULL) { 693 xpt_print_path(periph->path); 694 printf("unable to allocate CCB\n"); 695 error = ENOMEM; 696 break; 697 } 698 699 error = passsendccb(periph, ccb, inccb); 700 701 if (ccb_malloced) 702 xpt_free_ccb(ccb); 703 else 704 xpt_release_ccb(ccb); 705 706 break; 707 } 708 default: 709 error = cam_periph_ioctl(periph, cmd, addr, passerror); 710 break; 711 } 712 713 return(error); 714 } 715 716 /* 717 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 718 * should be the CCB that is copied in from the user. 719 */ 720 static int 721 passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 722 { 723 struct pass_softc *softc; 724 struct cam_periph_map_info mapinfo; 725 int error, need_unmap; 726 727 softc = (struct pass_softc *)periph->softc; 728 729 need_unmap = 0; 730 731 /* 732 * There are some fields in the CCB header that need to be 733 * preserved, the rest we get from the user. 734 */ 735 xpt_merge_ccb(ccb, inccb); 736 737 /* 738 * There's no way for the user to have a completion 739 * function, so we put our own completion function in here. 740 */ 741 ccb->ccb_h.cbfcnp = passdone; 742 743 /* 744 * We only attempt to map the user memory into kernel space 745 * if they haven't passed in a physical memory pointer, 746 * and if there is actually an I/O operation to perform. 747 * Right now cam_periph_mapmem() only supports SCSI and device 748 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 749 * there's actually data to map. cam_periph_mapmem() will do the 750 * right thing, even if there isn't data to map, but since CCBs 751 * without data are a reasonably common occurance (e.g. test unit 752 * ready), it will save a few cycles if we check for it here. 753 */ 754 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 755 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 756 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 757 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 758 759 bzero(&mapinfo, sizeof(mapinfo)); 760 761 error = cam_periph_mapmem(ccb, &mapinfo); 762 763 /* 764 * cam_periph_mapmem returned an error, we can't continue. 765 * Return the error to the user. 766 */ 767 if (error) 768 return(error); 769 770 /* 771 * We successfully mapped the memory in, so we need to 772 * unmap it when the transaction is done. 773 */ 774 need_unmap = 1; 775 } 776 777 /* 778 * If the user wants us to perform any error recovery, then honor 779 * that request. Otherwise, it's up to the user to perform any 780 * error recovery. 781 */ 782 error = cam_periph_runccb(ccb, 783 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 784 passerror : NULL, 785 /* cam_flags */ 0, 786 /* sense_flags */SF_RETRY_UA | SF_RETRY_SELTO, 787 &softc->device_stats); 788 789 if (need_unmap != 0) 790 cam_periph_unmapmem(ccb, &mapinfo); 791 792 ccb->ccb_h.cbfcnp = NULL; 793 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 794 bcopy(ccb, inccb, sizeof(union ccb)); 795 796 return(error); 797 } 798 799 static int 800 passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 801 { 802 struct cam_periph *periph; 803 struct pass_softc *softc; 804 805 periph = xpt_path_periph(ccb->ccb_h.path); 806 softc = (struct pass_softc *)periph->softc; 807 808 return(cam_periph_error(ccb, cam_flags, sense_flags, 809 &softc->saved_ccb)); 810 } 811