scsi_pass.c revision 47413
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 1.9 1999/05/09 01:25:30 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_close_t passclose; 99static d_ioctl_t passioctl; 100static d_strategy_t passstrategy; 101 102static periph_init_t passinit; 103static periph_ctor_t passregister; 104static periph_oninv_t passoninvalidate; 105static periph_dtor_t passcleanup; 106static periph_start_t passstart; 107static void passasync(void *callback_arg, u_int32_t code, 108 struct cam_path *path, void *arg); 109static void passdone(struct cam_periph *periph, 110 union ccb *done_ccb); 111static int passerror(union ccb *ccb, u_int32_t cam_flags, 112 u_int32_t sense_flags); 113static int passsendccb(struct cam_periph *periph, union ccb *ccb, 114 union ccb *inccb); 115 116static struct periph_driver passdriver = 117{ 118 passinit, "pass", 119 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 120}; 121 122DATA_SET(periphdriver_set, passdriver); 123 124static struct cdevsw pass_cdevsw = 125{ 126 /*d_open*/ passopen, 127 /*d_close*/ passclose, 128 /*d_read*/ physread, 129 /*d_write*/ physwrite, 130 /*d_ioctl*/ passioctl, 131 /*d_stop*/ nostop, 132 /*d_reset*/ noreset, 133 /*d_devtotty*/ nodevtotty, 134 /*d_poll*/ seltrue, 135 /*d_mmap*/ nommap, 136 /*d_strategy*/ passstrategy, 137 /*d_name*/ "pass", 138 /*d_spare*/ NULL, 139 /*d_maj*/ -1, 140 /*d_dump*/ nodump, 141 /*d_psize*/ nopsize, 142 /*d_flags*/ 0, 143 /*d_maxio*/ 0, 144 /*b_maj*/ -1 145}; 146 147static struct extend_array *passperiphs; 148 149static void 150passinit(void) 151{ 152 cam_status status; 153 struct cam_path *path; 154 155 /* 156 * Create our extend array for storing the devices we attach to. 157 */ 158 passperiphs = cam_extend_new(); 159 if (passperiphs == NULL) { 160 printf("passm: Failed to alloc extend array!\n"); 161 return; 162 } 163 164 /* 165 * Install a global async callback. This callback will 166 * receive async callbacks like "new device found". 167 */ 168 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 169 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 170 171 if (status == CAM_REQ_CMP) { 172 struct ccb_setasync csa; 173 174 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 175 csa.ccb_h.func_code = XPT_SASYNC_CB; 176 csa.event_enable = AC_FOUND_DEVICE; 177 csa.callback = passasync; 178 csa.callback_arg = NULL; 179 xpt_action((union ccb *)&csa); 180 status = csa.ccb_h.status; 181 xpt_free_path(path); 182 } 183 184 if (status != CAM_REQ_CMP) { 185 printf("pass: Failed to attach master async callback " 186 "due to status 0x%x!\n", status); 187 } else { 188 dev_t dev; 189 190 /* If we were successfull, register our devsw */ 191 dev = makedev(PASS_CDEV_MAJOR, 0); 192 cdevsw_add(&dev, &pass_cdevsw, NULL); 193 } 194 195} 196 197static void 198passoninvalidate(struct cam_periph *periph) 199{ 200 int s; 201 struct pass_softc *softc; 202 struct buf *q_bp; 203 struct ccb_setasync csa; 204 205 softc = (struct pass_softc *)periph->softc; 206 207 /* 208 * De-register any async callbacks. 209 */ 210 xpt_setup_ccb(&csa.ccb_h, periph->path, 211 /* priority */ 5); 212 csa.ccb_h.func_code = XPT_SASYNC_CB; 213 csa.event_enable = 0; 214 csa.callback = passasync; 215 csa.callback_arg = periph; 216 xpt_action((union ccb *)&csa); 217 218 softc->flags |= PASS_FLAG_INVALID; 219 220 /* 221 * Although the oninvalidate() routines are always called at 222 * splsoftcam, we need to be at splbio() here to keep the buffer 223 * queue from being modified while we traverse it. 224 */ 225 s = splbio(); 226 227 /* 228 * Return all queued I/O with ENXIO. 229 * XXX Handle any transactions queued to the card 230 * with XPT_ABORT_CCB. 231 */ 232 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 233 bufq_remove(&softc->buf_queue, q_bp); 234 q_bp->b_resid = q_bp->b_bcount; 235 q_bp->b_error = ENXIO; 236 q_bp->b_flags |= B_ERROR; 237 biodone(q_bp); 238 } 239 splx(s); 240 241 if (bootverbose) { 242 xpt_print_path(periph->path); 243 printf("lost device\n"); 244 } 245 246} 247 248static void 249passcleanup(struct cam_periph *periph) 250{ 251 struct pass_softc *softc; 252 253 softc = (struct pass_softc *)periph->softc; 254 255 devstat_remove_entry(&softc->device_stats); 256 257 cam_extend_release(passperiphs, periph->unit_number); 258 259 if (bootverbose) { 260 xpt_print_path(periph->path); 261 printf("removing device entry\n"); 262 } 263 free(softc, M_DEVBUF); 264} 265 266static void 267passasync(void *callback_arg, u_int32_t code, 268 struct cam_path *path, void *arg) 269{ 270 struct cam_periph *periph; 271 272 periph = (struct cam_periph *)callback_arg; 273 274 switch (code) { 275 case AC_FOUND_DEVICE: 276 { 277 struct ccb_getdev *cgd; 278 cam_status status; 279 280 cgd = (struct ccb_getdev *)arg; 281 282 /* 283 * Allocate a peripheral instance for 284 * this device and start the probe 285 * process. 286 */ 287 status = cam_periph_alloc(passregister, passoninvalidate, 288 passcleanup, passstart, "pass", 289 CAM_PERIPH_BIO, cgd->ccb_h.path, 290 passasync, AC_FOUND_DEVICE, cgd); 291 292 if (status != CAM_REQ_CMP 293 && status != CAM_REQ_INPROG) 294 printf("passasync: Unable to attach new device " 295 "due to status 0x%x\n", status); 296 297 break; 298 } 299 default: 300 cam_periph_async(periph, code, path, arg); 301 break; 302 } 303} 304 305static cam_status 306passregister(struct cam_periph *periph, void *arg) 307{ 308 struct pass_softc *softc; 309 struct ccb_setasync csa; 310 struct ccb_getdev *cgd; 311 312 cgd = (struct ccb_getdev *)arg; 313 if (periph == NULL) { 314 printf("passregister: periph was NULL!!\n"); 315 return(CAM_REQ_CMP_ERR); 316 } 317 318 if (cgd == NULL) { 319 printf("passregister: no getdev CCB, can't register device\n"); 320 return(CAM_REQ_CMP_ERR); 321 } 322 323 softc = (struct pass_softc *)malloc(sizeof(*softc), 324 M_DEVBUF, M_NOWAIT); 325 326 if (softc == NULL) { 327 printf("passregister: Unable to probe new device. " 328 "Unable to allocate softc\n"); 329 return(CAM_REQ_CMP_ERR); 330 } 331 332 bzero(softc, sizeof(*softc)); 333 softc->state = PASS_STATE_NORMAL; 334 softc->pd_type = cgd->pd_type; 335 bufq_init(&softc->buf_queue); 336 337 periph->softc = softc; 338 339 cam_extend_set(passperiphs, periph->unit_number, periph); 340 /* 341 * We pass in 0 for a blocksize, since we don't 342 * know what the blocksize of this device is, if 343 * it even has a blocksize. 344 */ 345 devstat_add_entry(&softc->device_stats, "pass", periph->unit_number, 346 0, DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS, 347 cgd->pd_type | 348 DEVSTAT_TYPE_IF_SCSI | 349 DEVSTAT_TYPE_PASS, 350 DEVSTAT_PRIORITY_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 int s; 375 376 error = 0; /* default to no error */ 377 378 /* unit = dkunit(dev); */ 379 /* XXX KDM fix this */ 380 unit = minor(dev) & 0xff; 381 382 periph = cam_extend_get(passperiphs, unit); 383 384 if (periph == NULL) 385 return (ENXIO); 386 387 softc = (struct pass_softc *)periph->softc; 388 389 s = splsoftcam(); 390 if (softc->flags & PASS_FLAG_INVALID) { 391 splx(s); 392 return(ENXIO); 393 } 394 395 /* 396 * Don't allow access when we're running at a high securelvel. 397 */ 398 if (securelevel > 1) { 399 splx(s); 400 return(EPERM); 401 } 402 403 /* 404 * Only allow read-write access. 405 */ 406 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) { 407 splx(s); 408 return(EPERM); 409 } 410 411 /* 412 * We don't allow nonblocking access. 413 */ 414 if ((flags & O_NONBLOCK) != 0) { 415 xpt_print_path(periph->path); 416 printf("can't do nonblocking accesss\n"); 417 splx(s); 418 return(EINVAL); 419 } 420 421 if ((error = cam_periph_lock(periph, PRIBIO | PCATCH)) != 0) { 422 splx(s); 423 return (error); 424 } 425 426 splx(s); 427 428 if ((softc->flags & PASS_FLAG_OPEN) == 0) { 429 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 430 return(ENXIO); 431 softc->flags |= PASS_FLAG_OPEN; 432 } 433 434 cam_periph_unlock(periph); 435 436 return (error); 437} 438 439static int 440passclose(dev_t dev, int flag, int fmt, struct proc *p) 441{ 442 struct cam_periph *periph; 443 struct pass_softc *softc; 444 int unit, error; 445 446 /* unit = dkunit(dev); */ 447 /* XXX KDM fix this */ 448 unit = minor(dev) & 0xff; 449 450 periph = cam_extend_get(passperiphs, unit); 451 if (periph == NULL) 452 return (ENXIO); 453 454 softc = (struct pass_softc *)periph->softc; 455 456 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 457 return (error); 458 459 softc->flags &= ~PASS_FLAG_OPEN; 460 461 cam_periph_unlock(periph); 462 cam_periph_release(periph); 463 464 return (0); 465} 466 467/* 468 * Actually translate the requested transfer into one the physical driver 469 * can understand. The transfer is described by a buf and will include 470 * only one physical transfer. 471 */ 472static void 473passstrategy(struct buf *bp) 474{ 475 struct cam_periph *periph; 476 struct pass_softc *softc; 477 u_int unit; 478 int s; 479 480 /* 481 * The read/write interface for the passthrough driver doesn't 482 * really work right now. So, we just pass back EINVAL to tell the 483 * user to go away. 484 */ 485 bp->b_error = EINVAL; 486 goto bad; 487 488 /* unit = dkunit(bp->b_dev); */ 489 /* XXX KDM fix this */ 490 unit = minor(bp->b_dev) & 0xff; 491 492 periph = cam_extend_get(passperiphs, unit); 493 if (periph == NULL) { 494 bp->b_error = ENXIO; 495 goto bad; 496 } 497 softc = (struct pass_softc *)periph->softc; 498 499 /* 500 * Odd number of bytes or negative offset 501 */ 502 /* valid request? */ 503 if (bp->b_blkno < 0) { 504 bp->b_error = EINVAL; 505 goto bad; 506 } 507 508 /* 509 * Mask interrupts so that the pack cannot be invalidated until 510 * after we are in the queue. Otherwise, we might not properly 511 * clean up one of the buffers. 512 */ 513 s = splbio(); 514 515 bufq_insert_tail(&softc->buf_queue, bp); 516 517 splx(s); 518 519 /* 520 * Schedule ourselves for performing the work. 521 */ 522 xpt_schedule(periph, /* XXX priority */1); 523 524 return; 525bad: 526 bp->b_flags |= B_ERROR; 527 528 /* 529 * Correctly set the buf to indicate a completed xfer 530 */ 531 bp->b_resid = bp->b_bcount; 532 biodone(bp); 533 return; 534} 535 536static void 537passstart(struct cam_periph *periph, union ccb *start_ccb) 538{ 539 struct pass_softc *softc; 540 int s; 541 542 softc = (struct pass_softc *)periph->softc; 543 544 switch (softc->state) { 545 case PASS_STATE_NORMAL: 546 { 547 struct buf *bp; 548 549 s = splbio(); 550 bp = bufq_first(&softc->buf_queue); 551 if (periph->immediate_priority <= periph->pinfo.priority) { 552 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 553 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 554 periph_links.sle); 555 periph->immediate_priority = CAM_PRIORITY_NONE; 556 splx(s); 557 wakeup(&periph->ccb_list); 558 } else if (bp == NULL) { 559 splx(s); 560 xpt_release_ccb(start_ccb); 561 } else { 562 563 bufq_remove(&softc->buf_queue, bp); 564 565 devstat_start_transaction(&softc->device_stats); 566 567 /* 568 * XXX JGibbs - 569 * Interpret the contents of the bp as a CCB 570 * and pass it to a routine shared by our ioctl 571 * code and passtart. 572 * For now, just biodone it with EIO so we don't 573 * hang. 574 */ 575 bp->b_error = EIO; 576 bp->b_flags |= B_ERROR; 577 bp->b_resid = bp->b_bcount; 578 biodone(bp); 579 bp = bufq_first(&softc->buf_queue); 580 splx(s); 581 582 xpt_action(start_ccb); 583 584 } 585 if (bp != NULL) { 586 /* Have more work to do, so ensure we stay scheduled */ 587 xpt_schedule(periph, /* XXX priority */1); 588 } 589 break; 590 } 591 } 592} 593static void 594passdone(struct cam_periph *periph, union ccb *done_ccb) 595{ 596 struct pass_softc *softc; 597 struct ccb_scsiio *csio; 598 599 softc = (struct pass_softc *)periph->softc; 600 csio = &done_ccb->csio; 601 switch (csio->ccb_h.ccb_type) { 602 case PASS_CCB_BUFFER_IO: 603 { 604 struct buf *bp; 605 cam_status status; 606 u_int8_t scsi_status; 607 devstat_trans_flags ds_flags; 608 609 status = done_ccb->ccb_h.status; 610 scsi_status = done_ccb->csio.scsi_status; 611 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 612 /* XXX handle errors */ 613 if (!(((status & CAM_STATUS_MASK) == CAM_REQ_CMP) 614 && (scsi_status == SCSI_STATUS_OK))) { 615 int error; 616 617 if ((error = passerror(done_ccb, 0, 0)) == ERESTART) { 618 /* 619 * A retry was scheuled, so 620 * just return. 621 */ 622 return; 623 } 624 625 /* 626 * XXX unfreeze the queue after we complete 627 * the abort process 628 */ 629 bp->b_error = error; 630 bp->b_flags |= B_ERROR; 631 } 632 633 if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 634 ds_flags = DEVSTAT_READ; 635 else if ((done_ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 636 ds_flags = DEVSTAT_WRITE; 637 else 638 ds_flags = DEVSTAT_NO_DATA; 639 640 devstat_end_transaction(&softc->device_stats, bp->b_bcount, 641 done_ccb->csio.tag_action & 0xf, 642 ds_flags); 643 644 biodone(bp); 645 break; 646 } 647 case PASS_CCB_WAITING: 648 { 649 /* Caller will release the CCB */ 650 wakeup(&done_ccb->ccb_h.cbfcnp); 651 return; 652 } 653 } 654 xpt_release_ccb(done_ccb); 655} 656 657static int 658passioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 659{ 660 struct cam_periph *periph; 661 struct pass_softc *softc; 662 u_int8_t unit; 663 int error; 664 665 666 /* unit = dkunit(dev); */ 667 /* XXX KDM fix this */ 668 unit = minor(dev) & 0xff; 669 670 periph = cam_extend_get(passperiphs, unit); 671 672 if (periph == NULL) 673 return(ENXIO); 674 675 softc = (struct pass_softc *)periph->softc; 676 677 error = 0; 678 679 switch (cmd) { 680 681 case CAMIOCOMMAND: 682 { 683 union ccb *inccb; 684 union ccb *ccb; 685 int ccb_malloced; 686 687 inccb = (union ccb *)addr; 688 689 /* 690 * Some CCB types, like scan bus and scan lun can only go 691 * through the transport layer device. 692 */ 693 if (inccb->ccb_h.func_code & XPT_FC_XPT_ONLY) { 694 xpt_print_path(periph->path); 695 printf("CCB function code %#x is restricted to the " 696 "XPT device\n", inccb->ccb_h.func_code); 697 error = ENODEV; 698 break; 699 } 700 701 /* 702 * Non-immediate CCBs need a CCB from the per-device pool 703 * of CCBs, which is scheduled by the transport layer. 704 * Immediate CCBs and user-supplied CCBs should just be 705 * malloced. 706 */ 707 if ((inccb->ccb_h.func_code & XPT_FC_QUEUED) 708 && ((inccb->ccb_h.func_code & XPT_FC_USER_CCB) == 0)) { 709 ccb = cam_periph_getccb(periph, 710 inccb->ccb_h.pinfo.priority); 711 ccb_malloced = 0; 712 } else { 713 ccb = xpt_alloc_ccb(); 714 715 if (ccb != NULL) 716 xpt_setup_ccb(&ccb->ccb_h, periph->path, 717 inccb->ccb_h.pinfo.priority); 718 ccb_malloced = 1; 719 } 720 721 if (ccb == NULL) { 722 xpt_print_path(periph->path); 723 printf("unable to allocate CCB\n"); 724 error = ENOMEM; 725 break; 726 } 727 728 error = passsendccb(periph, ccb, inccb); 729 730 if (ccb_malloced) 731 xpt_free_ccb(ccb); 732 else 733 xpt_release_ccb(ccb); 734 735 break; 736 } 737 default: 738 error = cam_periph_ioctl(periph, cmd, addr, passerror); 739 break; 740 } 741 742 return(error); 743} 744 745/* 746 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 747 * should be the CCB that is copied in from the user. 748 */ 749static int 750passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 751{ 752 struct pass_softc *softc; 753 struct cam_periph_map_info mapinfo; 754 int error, need_unmap; 755 756 softc = (struct pass_softc *)periph->softc; 757 758 need_unmap = 0; 759 760 /* 761 * There are some fields in the CCB header that need to be 762 * preserved, the rest we get from the user. 763 */ 764 xpt_merge_ccb(ccb, inccb); 765 766 /* 767 * There's no way for the user to have a completion 768 * function, so we put our own completion function in here. 769 */ 770 ccb->ccb_h.cbfcnp = passdone; 771 772 /* 773 * We only attempt to map the user memory into kernel space 774 * if they haven't passed in a physical memory pointer, 775 * and if there is actually an I/O operation to perform. 776 * Right now cam_periph_mapmem() only supports SCSI and device 777 * match CCBs. For the SCSI CCBs, we only pass the CCB in if 778 * there's actually data to map. cam_periph_mapmem() will do the 779 * right thing, even if there isn't data to map, but since CCBs 780 * without data are a reasonably common occurance (e.g. test unit 781 * ready), it will save a few cycles if we check for it here. 782 */ 783 if (((ccb->ccb_h.flags & CAM_DATA_PHYS) == 0) 784 && (((ccb->ccb_h.func_code == XPT_SCSI_IO) 785 && ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)) 786 || (ccb->ccb_h.func_code == XPT_DEV_MATCH))) { 787 788 bzero(&mapinfo, sizeof(mapinfo)); 789 790 error = cam_periph_mapmem(ccb, &mapinfo); 791 792 /* 793 * cam_periph_mapmem returned an error, we can't continue. 794 * Return the error to the user. 795 */ 796 if (error) 797 return(error); 798 799 /* 800 * We successfully mapped the memory in, so we need to 801 * unmap it when the transaction is done. 802 */ 803 need_unmap = 1; 804 } 805 806 /* 807 * If the user wants us to perform any error recovery, then honor 808 * that request. Otherwise, it's up to the user to perform any 809 * error recovery. 810 */ 811 error = cam_periph_runccb(ccb, 812 (ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 813 passerror : NULL, 814 /* cam_flags */ 0, 815 /* sense_flags */SF_RETRY_UA | SF_RETRY_SELTO, 816 &softc->device_stats); 817 818 if (need_unmap != 0) 819 cam_periph_unmapmem(ccb, &mapinfo); 820 821 ccb->ccb_h.cbfcnp = NULL; 822 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 823 bcopy(ccb, inccb, sizeof(union ccb)); 824 825 return(error); 826} 827 828static int 829passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 830{ 831 struct cam_periph *periph; 832 struct pass_softc *softc; 833 834 periph = xpt_path_periph(ccb->ccb_h.path); 835 softc = (struct pass_softc *)periph->softc; 836 837 return(cam_periph_error(ccb, cam_flags, sense_flags, 838 &softc->saved_ccb)); 839} 840