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 * $Id: scsi_pass.c,v 1.11 1999/05/30 16:51:03 phk 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 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 #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 97 static d_open_t passopen; 98 static d_close_t passclose; 99 static d_ioctl_t passioctl; 100 static d_strategy_t passstrategy; 101 102 static periph_init_t passinit; 103 static periph_ctor_t passregister; 104 static periph_oninv_t passoninvalidate; 105 static periph_dtor_t passcleanup; 106 static periph_start_t passstart; 107 static void passasync(void *callback_arg, u_int32_t code, 108 struct cam_path *path, void *arg); 109 static void passdone(struct cam_periph *periph, 110 union ccb *done_ccb); 111 static int passerror(union ccb *ccb, u_int32_t cam_flags, 112 u_int32_t sense_flags); 113 static int passsendccb(struct cam_periph *periph, union ccb *ccb, 114 union ccb *inccb); 115 116 static struct periph_driver passdriver = 117 { 118 passinit, "pass", 119 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 120 }; 121 122 DATA_SET(periphdriver_set, passdriver); 123 124 static struct cdevsw pass_cdevsw = { 125 /* open */ passopen, 126 /* close */ passclose, 127 /* read */ physread, 128 /* write */ physwrite, 129 /* ioctl */ passioctl, 130 /* stop */ nostop, 131 /* reset */ noreset, 132 /* devtotty */ nodevtotty, 133 /* poll */ nopoll, 134 /* mmap */ nommap, 135 /* strategy */ passstrategy, 136 /* name */ "pass", 137 /* parms */ noparms, 138 /* maj */ PASS_CDEV_MAJOR, 139 /* dump */ nodump, 140 /* psize */ nopsize, 141 /* flags */ 0, 142 /* maxio */ 0, 143 /* bmaj */ -1 144 }; 145 146 static struct extend_array *passperiphs; 147 148 static void 149 passinit(void) 150 { 151 cam_status status; 152 struct cam_path *path; 153 154 /* 155 * Create our extend array for storing the devices we attach to. 156 */ 157 passperiphs = cam_extend_new(); 158 if (passperiphs == NULL) { 159 printf("passm: Failed to alloc extend array!\n"); 160 return; 161 } 162 163 /* 164 * Install a global async callback. This callback will 165 * receive async callbacks like "new device found". 166 */ 167 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 168 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 169 170 if (status == CAM_REQ_CMP) { 171 struct ccb_setasync csa; 172 173 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 174 csa.ccb_h.func_code = XPT_SASYNC_CB; 175 csa.event_enable = AC_FOUND_DEVICE; 176 csa.callback = passasync; 177 csa.callback_arg = NULL; 178 xpt_action((union ccb *)&csa); 179 status = csa.ccb_h.status; 180 xpt_free_path(path); 181 } 182 183 if (status != CAM_REQ_CMP) { 184 printf("pass: Failed to attach master async callback " 185 "due to status 0x%x!\n", status); 186 } else { 187 /* If we were successfull, register our devsw */ 188 cdevsw_add(&pass_cdevsw); 189 } 190 191 } 192 193 static void 194 passoninvalidate(struct cam_periph *periph) 195 { 196 int s; 197 struct pass_softc *softc; 198 struct buf *q_bp; 199 struct ccb_setasync csa; 200 201 softc = (struct pass_softc *)periph->softc; 202 203 /* 204 * De-register any async callbacks. 205 */ 206 xpt_setup_ccb(&csa.ccb_h, periph->path, 207 /* priority */ 5); 208 csa.ccb_h.func_code = XPT_SASYNC_CB; 209 csa.event_enable = 0; 210 csa.callback = passasync; 211 csa.callback_arg = periph; 212 xpt_action((union ccb *)&csa); 213 214 softc->flags |= PASS_FLAG_INVALID; 215 216 /* 217 * Although the oninvalidate() routines are always called at 218 * splsoftcam, we need to be at splbio() here to keep the buffer 219 * queue from being modified while we traverse it. 220 */ 221 s = splbio(); 222 223 /* 224 * Return all queued I/O with ENXIO. 225 * XXX Handle any transactions queued to the card 226 * with XPT_ABORT_CCB. 227 */ 228 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 229 bufq_remove(&softc->buf_queue, q_bp); 230 q_bp->b_resid = q_bp->b_bcount; 231 q_bp->b_error = ENXIO; 232 q_bp->b_flags |= B_ERROR; 233 biodone(q_bp); 234 } 235 splx(s); 236 237 if (bootverbose) { 238 xpt_print_path(periph->path); 239 printf("lost device\n"); 240 } 241 242 } 243 244 static void 245 passcleanup(struct cam_periph *periph) 246 { 247 struct pass_softc *softc; 248 249 softc = (struct pass_softc *)periph->softc; 250 251 devstat_remove_entry(&softc->device_stats); 252 253 cam_extend_release(passperiphs, periph->unit_number); 254 255 if (bootverbose) { 256 xpt_print_path(periph->path); 257 printf("removing device entry\n"); 258 } 259 free(softc, M_DEVBUF); 260 } 261 262 static void 263 passasync(void *callback_arg, u_int32_t code, 264 struct cam_path *path, void *arg) 265 { 266 struct cam_periph *periph; 267 268 periph = (struct cam_periph *)callback_arg; 269 270 switch (code) { 271 case AC_FOUND_DEVICE: 272 { 273 struct ccb_getdev *cgd; 274 cam_status status; 275 276 cgd = (struct ccb_getdev *)arg; 277 278 /* 279 * Allocate a peripheral instance for 280 * this device and start the probe 281 * process. 282 */ 283 status = cam_periph_alloc(passregister, passoninvalidate, 284 passcleanup, passstart, "pass", 285 CAM_PERIPH_BIO, cgd->ccb_h.path, 286 passasync, AC_FOUND_DEVICE, cgd); 287 288 if (status != CAM_REQ_CMP 289 && status != CAM_REQ_INPROG) 290 printf("passasync: Unable to attach new device " 291 "due to status 0x%x\n", status); 292 293 break; 294 } 295 default: 296 cam_periph_async(periph, code, path, arg); 297 break; 298 } 299 } 300 301 static cam_status 302 passregister(struct cam_periph *periph, void *arg) 303 { 304 struct pass_softc *softc; 305 struct ccb_setasync csa; 306 struct ccb_getdev *cgd; 307 308 cgd = (struct ccb_getdev *)arg; 309 if (periph == NULL) { 310 printf("passregister: periph was NULL!!\n"); 311 return(CAM_REQ_CMP_ERR); 312 } 313 314 if (cgd == NULL) { 315 printf("passregister: no getdev CCB, can't register device\n"); 316 return(CAM_REQ_CMP_ERR); 317 } 318 319 softc = (struct pass_softc *)malloc(sizeof(*softc), 320 M_DEVBUF, M_NOWAIT); 321 322 if (softc == NULL) { 323 printf("passregister: Unable to probe new device. " 324 "Unable to allocate softc\n"); 325 return(CAM_REQ_CMP_ERR); 326 } 327 328 bzero(softc, sizeof(*softc)); 329 softc->state = PASS_STATE_NORMAL; 330 softc->pd_type = cgd->pd_type; 331 bufq_init(&softc->buf_queue); 332 333 periph->softc = softc; 334 335 cam_extend_set(passperiphs, periph->unit_number, periph); 336 /* 337 * We pass in 0 for a blocksize, since we don't 338 * know what the blocksize of this device is, if 339 * it even has a blocksize. 340 */ 341 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 342 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 343 cgd->pd_type | 344 DEVSTAT_TYPE_IF_SCSI | 345 DEVSTAT_TYPE_PASS, 346 DEVSTAT_PRIORITY_PASS); 347 /* 348 * Add an async callback so that we get 349 * notified if this device goes away. 350 */ 351 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5); 352 csa.ccb_h.func_code = XPT_SASYNC_CB; 353 csa.event_enable = AC_LOST_DEVICE; 354 csa.callback = passasync; 355 csa.callback_arg = periph; 356 xpt_action((union ccb *)&csa); 357 358 if (bootverbose) 359 xpt_announce_periph(periph, NULL); 360 361 return(CAM_REQ_CMP); 362 } 363 364 static int 365 passopen(dev_t dev, int flags, int fmt, struct proc *p) 366 { 367 struct cam_periph *periph; 368 struct pass_softc *softc; 369 int unit, error; 370 int s; 371 372 error = 0; /* default to no error */ 373 374 /* unit = dkunit(dev); */ 375 /* XXX KDM fix this */ 376 unit = minor(dev) & 0xff; 377 378 periph = cam_extend_get(passperiphs, unit); 379 380 if (periph == NULL) 381 return (ENXIO); 382 383 softc = (struct pass_softc *)periph->softc; 384 385 s = splsoftcam(); 386 if (softc->flags & PASS_FLAG_INVALID) { 387 splx(s); 388 return(ENXIO); 389 } 390 391 /* 392 * Don't allow access when we're running at a high securelvel. 393 */ 394 if (securelevel > 1) { 395 splx(s); 396 return(EPERM); 397 } 398 399 /* 400 * Only allow read-write access. 401 */ 402 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) { 403 splx(s); 404 return(EPERM); 405 } 406 407 /* 408 * We don't allow nonblocking access. 409 */ 410 if ((flags & O_NONBLOCK) != 0) { 411 xpt_print_path(periph->path); 412 printf("can't do nonblocking accesss\n"); 413 splx(s); 414 return(EINVAL); 415 } 416 417 if ((error = cam_periph_lock(periph, PRIBIO | PCATCH)) != 0) { 418 splx(s); 419 return (error); 420 } 421 422 splx(s); 423 424 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 425 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 426 return(ENXIO); 427 softc->flags |= PASS_FLAG_OPEN; 428 } 429 430 cam_periph_unlock(periph); 431 432 return (error); 433 } 434 435 static int 436 passclose(dev_t dev, int flag, int fmt, struct proc *p) 437 { 438 struct cam_periph *periph; 439 struct pass_softc *softc; 440 int unit, error; 441 442 /* unit = dkunit(dev); */ 443 /* XXX KDM fix this */ 444 unit = minor(dev) & 0xff; 445 446 periph = cam_extend_get(passperiphs, unit); 447 if (periph == NULL) 448 return (ENXIO); 449 450 softc = (struct pass_softc *)periph->softc; 451 452 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 453 return (error); 454 455 softc->flags &= ~PASS_FLAG_OPEN; 456 457 cam_periph_unlock(periph); 458 cam_periph_release(periph); 459 460 return (0); 461 } 462 463 /* 464 * Actually translate the requested transfer into one the physical driver 465 * can understand. The transfer is described by a buf and will include 466 * only one physical transfer. 467 */ 468 static void 469 passstrategy(struct buf *bp) 470 { 471 struct cam_periph *periph; 472 struct pass_softc *softc; 473 u_int unit; 474 int s; 475 476 /* 477 * The read/write interface for the passthrough driver doesn't 478 * really work right now. So, we just pass back EINVAL to tell the 479 * user to go away. 480 */ 481 bp->b_error = EINVAL; 482 goto bad; 483 484 /* unit = dkunit(bp->b_dev); */ 485 /* XXX KDM fix this */ 486 unit = minor(bp->b_dev) & 0xff; 487 488 periph = cam_extend_get(passperiphs, unit); 489 if (periph == NULL) { 490 bp->b_error = ENXIO; 491 goto bad; 492 } 493 softc = (struct pass_softc *)periph->softc; 494 495 /* 496 * Odd number of bytes or negative offset 497 */ 498 /* valid request? */ 499 if (bp->b_blkno < 0) { 500 bp->b_error = EINVAL; 501 goto bad; 502 } 503 504 /* 505 * Mask interrupts so that the pack cannot be invalidated until 506 * after we are in the queue. Otherwise, we might not properly 507 * clean up one of the buffers. 508 */ 509 s = splbio(); 510 511 bufq_insert_tail(&softc->buf_queue, bp); 512 513 splx(s); 514 515 /* 516 * Schedule ourselves for performing the work. 517 */ 518 xpt_schedule(periph, /* XXX priority */1); 519 520 return; 521 bad: 522 bp->b_flags |= B_ERROR; 523 524 /* 525 * Correctly set the buf to indicate a completed xfer 526 */ 527 bp->b_resid = bp->b_bcount; 528 biodone(bp); 529 return; 530 } 531 532 static void 533 passstart(struct cam_periph *periph, union ccb *start_ccb) 534 { 535 struct pass_softc *softc; 536 int s; 537 538 softc = (struct pass_softc *)periph->softc; 539 540 switch (softc->state) { 541 case PASS_STATE_NORMAL: 542 { 543 struct buf *bp; 544 545 s = splbio(); 546 bp = bufq_first(&softc->buf_queue); 547 if (periph->immediate_priority <= periph->pinfo.priority) { 548 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 549 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 550 periph_links.sle); 551 periph->immediate_priority = CAM_PRIORITY_NONE; 552 splx(s); 553 wakeup(&periph->ccb_list); 554 } else if (bp == NULL) { 555 splx(s); 556 xpt_release_ccb(start_ccb); 557 } else { 558 559 bufq_remove(&softc->buf_queue, bp); 560 561 devstat_start_transaction(&softc->device_stats); 562 563 /* 564 * XXX JGibbs - 565 * Interpret the contents of the bp as a CCB 566 * and pass it to a routine shared by our ioctl 567 * code and passtart. 568 * For now, just biodone it with EIO so we don't 569 * hang. 570 */ 571 bp->b_error = EIO; 572 bp->b_flags |= B_ERROR; 573 bp->b_resid = bp->b_bcount; 574 biodone(bp); 575 bp = bufq_first(&softc->buf_queue); 576 splx(s); 577 578 xpt_action(start_ccb); 579 580 } 581 if (bp != NULL) { 582 /* Have more work to do, so ensure we stay scheduled */ 583 xpt_schedule(periph, /* XXX priority */1); 584 } 585 break; 586 } 587 } 588 } 589 static void 590 passdone(struct cam_periph *periph, union ccb *done_ccb) 591 { 592 struct pass_softc *softc; 593 struct ccb_scsiio *csio; 594 595 softc = (struct pass_softc *)periph->softc; 596 csio = &done_ccb->csio; 597 switch (csio->ccb_h.ccb_type) { 598 case PASS_CCB_BUFFER_IO: 599 { 600 struct buf *bp; 601 cam_status status; 602 u_int8_t scsi_status; 603 devstat_trans_flags ds_flags; 604 605 status = done_ccb->ccb_h.status; 606 scsi_status = done_ccb->csio.scsi_status; 607 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 608 /* XXX handle errors */ 609 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 610 && (scsi_status == SCSI_STATUS_OK))) { 611 int error; 612 613 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 614 /* 615 * A retry was scheuled, so 616 * just return. 617 */ 618 return; 619 } 620 621 /* 622 * XXX unfreeze the queue after we complete 623 * the abort process 624 */ 625 bp->b_error = error; 626 bp->b_flags |= B_ERROR; 627 } 628 629 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 630 ds_flags = DEVSTAT_READ; 631 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 632 ds_flags = DEVSTAT_WRITE; 633 else 634 ds_flags = DEVSTAT_NO_DATA; 635 636 devstat_end_transaction(&softc->device_stats, bp->b_bcount, 637 done_ccb->csio.tag_action & 0xf, 638 ds_flags); 639 640 biodone(bp); 641 break; 642 } 643 case PASS_CCB_WAITING: 644 { 645 /* Caller will release the CCB */ 646 wakeup(&done_ccb->ccb_h.cbfcnp); 647 return; 648 } 649 } 650 xpt_release_ccb(done_ccb); 651 } 652 653 static int 654 passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 655 { 656 struct cam_periph *periph; 657 struct pass_softc *softc; 658 u_int8_t unit; 659 int error; 660 661 662 /* unit = dkunit(dev); */ 663 /* XXX KDM fix this */ 664 unit = minor(dev) & 0xff; 665 666 periph = cam_extend_get(passperiphs, unit); 667 668 if (periph == NULL) 669 return(ENXIO); 670 671 softc = (struct pass_softc *)periph->softc; 672 673 error = 0; 674 675 switch (cmd) { 676 677 case CAMIOCOMMAND: 678 { 679 union ccb *inccb; 680 union ccb *ccb; 681 int ccb_malloced; 682 683 inccb = (union ccb *)addr; 684 685 /* 686 * Some CCB types, like scan bus and scan lun can only go 687 * through the transport layer device. 688 */ 689 if (inccb->ccb_h.func_code & XPT_FC_XPT_ONLY) { 690 xpt_print_path(periph->path); 691 printf("CCB function code %#x is restricted to the " 692 "XPT device\n", inccb->ccb_h.func_code); 693 error = ENODEV; 694 break; 695 } 696 697 /* 698 * Non-immediate CCBs need a CCB from the per-device pool 699 * of CCBs, which is scheduled by the transport layer. 700 * Immediate CCBs and user-supplied CCBs should just be 701 * malloced. 702 */ 703 if ((inccb->ccb_h.func_code & XPT_FC_QUEUED) 704 && ((inccb->ccb_h.func_code & XPT_FC_USER_CCB) == 0)) { 705 ccb = cam_periph_getccb(periph, 706 inccb->ccb_h.pinfo.priority); 707 ccb_malloced = 0; 708 } else { 709 ccb = xpt_alloc_ccb(); 710 711 if (ccb != NULL) 712 xpt_setup_ccb(&ccb->ccb_h, periph->path, 713 inccb->ccb_h.pinfo.priority); 714 ccb_malloced = 1; 715 } 716 717 if (ccb == NULL) { 718 xpt_print_path(periph->path); 719 printf("unable to allocate CCB\n"); 720 error = ENOMEM; 721 break; 722 } 723 724 error = passsendccb(periph, ccb, inccb); 725 726 if (ccb_malloced) 727 xpt_free_ccb(ccb); 728 else 729 xpt_release_ccb(ccb); 730 731 break; 732 } 733 default: 734 error = cam_periph_ioctl(periph, cmd, addr, passerror); 735 break; 736 } 737 738 return(error); 739 } 740 741 /* 742 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 743 * should be the CCB that is copied in from the user. 744 */ 745 static int 746 passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 747 { 748 struct pass_softc *softc; 749 struct cam_periph_map_info mapinfo; 750 int error, need_unmap; 751 752 softc = (struct pass_softc *)periph->softc; 753 754 need_unmap = 0; 755 756 /* 757 * There are some fields in the CCB header that need to be 758 * preserved, the rest we get from the user. 759 */ 760 xpt_merge_ccb(ccb, inccb); 761 762 /* 763 * There's no way for the user to have a completion 764 * function, so we put our own completion function in here. 765 */ 766 ccb->ccb_h.cbfcnp = passdone; 767 768 /* 769 * We only attempt to map the user memory into kernel space 770 * if they haven't passed in a physical memory pointer, 771 * and if there is actually an I/O operation to perform. 772 * Right now cam_periph_mapmem() only supports SCSI and device 773 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 774 * there's actually data to map. cam_periph_mapmem() will do the 775 * right thing, even if there isn't data to map, but since CCBs 776 * without data are a reasonably common occurance (e.g. test unit 777 * ready), it will save a few cycles if we check for it here. 778 */ 779 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 780 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 781 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 782 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 783 784 bzero(&mapinfo, sizeof(mapinfo)); 785 786 error = cam_periph_mapmem(ccb, &mapinfo); 787 788 /* 789 * cam_periph_mapmem returned an error, we can't continue. 790 * Return the error to the user. 791 */ 792 if (error) 793 return(error); 794 795 /* 796 * We successfully mapped the memory in, so we need to 797 * unmap it when the transaction is done. 798 */ 799 need_unmap = 1; 800 } 801 802 /* 803 * If the user wants us to perform any error recovery, then honor 804 * that request. Otherwise, it's up to the user to perform any 805 * error recovery. 806 */ 807 error = cam_periph_runccb(ccb, 808 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 809 passerror : NULL, 810 /* cam_flags */ 0, 811 /* sense_flags */SF_RETRY_UA | SF_RETRY_SELTO, 812 &softc->device_stats); 813 814 if (need_unmap != 0) 815 cam_periph_unmapmem(ccb, &mapinfo); 816 817 ccb->ccb_h.cbfcnp = NULL; 818 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 819 bcopy(ccb, inccb, sizeof(union ccb)); 820 821 return(error); 822 } 823 824 static int 825 passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 826 { 827 struct cam_periph *periph; 828 struct pass_softc *softc; 829 830 periph = xpt_path_periph(ccb->ccb_h.path); 831 softc = (struct pass_softc *)periph->softc; 832 833 return(cam_periph_error(ccb, cam_flags, sense_flags, 834 &softc->saved_ccb)); 835 } 836