1 /* 2 * Implementation of SCSI Processor Target Peripheral driver for CAM. 3 * 4 * Copyright (c) 1998 Justin T. Gibbs. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/types.h> 36 #include <sys/bio.h> 37 #include <sys/devicestat.h> 38 #include <sys/malloc.h> 39 #include <sys/conf.h> 40 #include <sys/ptio.h> 41 42 #include <cam/cam.h> 43 #include <cam/cam_ccb.h> 44 #include <cam/cam_extend.h> 45 #include <cam/cam_periph.h> 46 #include <cam/cam_xpt_periph.h> 47 #include <cam/cam_debug.h> 48 49 #include <cam/scsi/scsi_all.h> 50 #include <cam/scsi/scsi_message.h> 51 #include <cam/scsi/scsi_pt.h> 52 53 #include "opt_pt.h" 54 55 typedef enum { 56 PT_STATE_PROBE, 57 PT_STATE_NORMAL 58 } pt_state; 59 60 typedef enum { 61 PT_FLAG_NONE = 0x00, 62 PT_FLAG_OPEN = 0x01, 63 PT_FLAG_DEVICE_INVALID = 0x02, 64 PT_FLAG_RETRY_UA = 0x04 65 } pt_flags; 66 67 typedef enum { 68 PT_CCB_BUFFER_IO = 0x01, 69 PT_CCB_WAITING = 0x02, 70 PT_CCB_RETRY_UA = 0x04, 71 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA 72 } pt_ccb_state; 73 74 /* Offsets into our private area for storing information */ 75 #define ccb_state ppriv_field0 76 #define ccb_bp ppriv_ptr1 77 78 struct pt_softc { 79 struct bio_queue_head bio_queue; 80 struct devstat device_stats; 81 LIST_HEAD(, ccb_hdr) pending_ccbs; 82 pt_state state; 83 pt_flags flags; 84 union ccb saved_ccb; 85 int io_timeout; 86 dev_t dev; 87 }; 88 89 static d_open_t ptopen; 90 static d_close_t ptclose; 91 static d_strategy_t ptstrategy; 92 static periph_init_t ptinit; 93 static void ptasync(void *callback_arg, u_int32_t code, 94 struct cam_path *path, void *arg); 95 static periph_ctor_t ptctor; 96 static periph_oninv_t ptoninvalidate; 97 static periph_dtor_t ptdtor; 98 static periph_start_t ptstart; 99 static void ptdone(struct cam_periph *periph, 100 union ccb *done_ccb); 101 static d_ioctl_t ptioctl; 102 static int pterror(union ccb *ccb, u_int32_t cam_flags, 103 u_int32_t sense_flags); 104 105 void scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 106 void (*cbfcnp)(struct cam_periph *, union ccb *), 107 u_int tag_action, int readop, u_int byte2, 108 u_int32_t xfer_len, u_int8_t *data_ptr, 109 u_int8_t sense_len, u_int32_t timeout); 110 111 static struct periph_driver ptdriver = 112 { 113 ptinit, "pt", 114 TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0 115 }; 116 117 PERIPHDRIVER_DECLARE(pt, ptdriver); 118 119 #define PT_CDEV_MAJOR 61 120 121 static struct cdevsw pt_cdevsw = { 122 /* open */ ptopen, 123 /* close */ ptclose, 124 /* read */ physread, 125 /* write */ physwrite, 126 /* ioctl */ ptioctl, 127 /* poll */ nopoll, 128 /* mmap */ nommap, 129 /* strategy */ ptstrategy, 130 /* name */ "pt", 131 /* maj */ PT_CDEV_MAJOR, 132 /* dump */ nodump, 133 /* psize */ nopsize, 134 /* flags */ 0, 135 }; 136 137 static struct extend_array *ptperiphs; 138 139 #ifndef SCSI_PT_DEFAULT_TIMEOUT 140 #define SCSI_PT_DEFAULT_TIMEOUT 60 141 #endif 142 143 static int 144 ptopen(dev_t dev, int flags, int fmt, struct proc *p) 145 { 146 struct cam_periph *periph; 147 struct pt_softc *softc; 148 int unit; 149 int error; 150 int s; 151 152 unit = minor(dev); 153 periph = cam_extend_get(ptperiphs, unit); 154 if (periph == NULL) 155 return (ENXIO); 156 157 softc = (struct pt_softc *)periph->softc; 158 159 s = splsoftcam(); 160 if (softc->flags & PT_FLAG_DEVICE_INVALID) { 161 splx(s); 162 return(ENXIO); 163 } 164 165 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 166 ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit)); 167 168 if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) { 169 splx(s); 170 return (error); /* error code from tsleep */ 171 } 172 173 splx(s); 174 175 if ((softc->flags & PT_FLAG_OPEN) == 0) { 176 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 177 error = ENXIO; 178 else 179 softc->flags |= PT_FLAG_OPEN; 180 } else 181 error = EBUSY; 182 183 cam_periph_unlock(periph); 184 return (error); 185 } 186 187 static int 188 ptclose(dev_t dev, int flag, int fmt, struct proc *p) 189 { 190 struct cam_periph *periph; 191 struct pt_softc *softc; 192 int unit; 193 int error; 194 195 unit = minor(dev); 196 periph = cam_extend_get(ptperiphs, unit); 197 if (periph == NULL) 198 return (ENXIO); 199 200 softc = (struct pt_softc *)periph->softc; 201 202 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 203 return (error); /* error code from tsleep */ 204 205 softc->flags &= ~PT_FLAG_OPEN; 206 cam_periph_unlock(periph); 207 cam_periph_release(periph); 208 return (0); 209 } 210 211 /* 212 * Actually translate the requested transfer into one the physical driver 213 * can understand. The transfer is described by a buf and will include 214 * only one physical transfer. 215 */ 216 static void 217 ptstrategy(struct bio *bp) 218 { 219 struct cam_periph *periph; 220 struct pt_softc *softc; 221 u_int unit; 222 int s; 223 224 unit = minor(bp->bio_dev); 225 periph = cam_extend_get(ptperiphs, unit); 226 bp->bio_resid = bp->bio_bcount; 227 if (periph == NULL) { 228 biofinish(bp, NULL, ENXIO); 229 return; 230 } 231 softc = (struct pt_softc *)periph->softc; 232 233 /* 234 * Mask interrupts so that the pack cannot be invalidated until 235 * after we are in the queue. Otherwise, we might not properly 236 * clean up one of the buffers. 237 */ 238 s = splbio(); 239 240 /* 241 * If the device has been made invalid, error out 242 */ 243 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) { 244 splx(s); 245 biofinish(bp, NULL, ENXIO); 246 return; 247 } 248 249 /* 250 * Place it in the queue of disk activities for this disk 251 */ 252 bioq_insert_tail(&softc->bio_queue, bp); 253 254 splx(s); 255 256 /* 257 * Schedule ourselves for performing the work. 258 */ 259 xpt_schedule(periph, /* XXX priority */1); 260 261 return; 262 } 263 264 static void 265 ptinit(void) 266 { 267 cam_status status; 268 struct cam_path *path; 269 270 /* 271 * Create our extend array for storing the devices we attach to. 272 */ 273 ptperiphs = cam_extend_new(); 274 if (ptperiphs == NULL) { 275 printf("pt: Failed to alloc extend array!\n"); 276 return; 277 } 278 279 /* 280 * Install a global async callback. This callback will 281 * receive async callbacks like "new device found". 282 */ 283 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 284 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 285 286 if (status == CAM_REQ_CMP) { 287 struct ccb_setasync csa; 288 289 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 290 csa.ccb_h.func_code = XPT_SASYNC_CB; 291 csa.event_enable = AC_FOUND_DEVICE; 292 csa.callback = ptasync; 293 csa.callback_arg = NULL; 294 xpt_action((union ccb *)&csa); 295 status = csa.ccb_h.status; 296 xpt_free_path(path); 297 } 298 299 if (status != CAM_REQ_CMP) { 300 printf("pt: Failed to attach master async callback " 301 "due to status 0x%x!\n", status); 302 } 303 } 304 305 static cam_status 306 ptctor(struct cam_periph *periph, void *arg) 307 { 308 struct pt_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("ptregister: periph was NULL!!\n"); 315 return(CAM_REQ_CMP_ERR); 316 } 317 318 if (cgd == NULL) { 319 printf("ptregister: no getdev CCB, can't register device\n"); 320 return(CAM_REQ_CMP_ERR); 321 } 322 323 softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT); 324 325 if (softc == NULL) { 326 printf("daregister: Unable to probe new device. " 327 "Unable to allocate softc\n"); 328 return(CAM_REQ_CMP_ERR); 329 } 330 331 bzero(softc, sizeof(*softc)); 332 LIST_INIT(&softc->pending_ccbs); 333 softc->state = PT_STATE_NORMAL; 334 bioq_init(&softc->bio_queue); 335 336 softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000; 337 338 periph->softc = softc; 339 340 cam_extend_set(ptperiphs, periph->unit_number, periph); 341 342 devstat_add_entry(&softc->device_stats, "pt", 343 periph->unit_number, 0, 344 DEVSTAT_NO_BLOCKSIZE, 345 SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI, 346 DEVSTAT_PRIORITY_OTHER); 347 348 softc->dev = make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT, 349 GID_OPERATOR, 0600, "%s%d", periph->periph_name, 350 periph->unit_number); 351 /* 352 * Add async callbacks for bus reset and 353 * bus device reset calls. I don't bother 354 * checking if this fails as, in most cases, 355 * the system will function just fine without 356 * them and the only alternative would be to 357 * not attach the device on failure. 358 */ 359 xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5); 360 csa.ccb_h.func_code = XPT_SASYNC_CB; 361 csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE; 362 csa.callback = ptasync; 363 csa.callback_arg = periph; 364 xpt_action((union ccb *)&csa); 365 366 /* Tell the user we've attached to the device */ 367 xpt_announce_periph(periph, NULL); 368 369 return(CAM_REQ_CMP); 370 } 371 372 static void 373 ptoninvalidate(struct cam_periph *periph) 374 { 375 int s; 376 struct pt_softc *softc; 377 struct bio *q_bp; 378 struct ccb_setasync csa; 379 380 softc = (struct pt_softc *)periph->softc; 381 382 /* 383 * De-register any async callbacks. 384 */ 385 xpt_setup_ccb(&csa.ccb_h, periph->path, 386 /* priority */ 5); 387 csa.ccb_h.func_code = XPT_SASYNC_CB; 388 csa.event_enable = 0; 389 csa.callback = ptasync; 390 csa.callback_arg = periph; 391 xpt_action((union ccb *)&csa); 392 393 softc->flags |= PT_FLAG_DEVICE_INVALID; 394 395 /* 396 * Although the oninvalidate() routines are always called at 397 * splsoftcam, we need to be at splbio() here to keep the buffer 398 * queue from being modified while we traverse it. 399 */ 400 s = splbio(); 401 402 /* 403 * Return all queued I/O with ENXIO. 404 * XXX Handle any transactions queued to the card 405 * with XPT_ABORT_CCB. 406 */ 407 while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){ 408 bioq_remove(&softc->bio_queue, q_bp); 409 q_bp->bio_resid = q_bp->bio_bcount; 410 biofinish(q_bp, NULL, ENXIO); 411 } 412 413 splx(s); 414 415 xpt_print_path(periph->path); 416 printf("lost device\n"); 417 } 418 419 static void 420 ptdtor(struct cam_periph *periph) 421 { 422 struct pt_softc *softc; 423 424 softc = (struct pt_softc *)periph->softc; 425 426 devstat_remove_entry(&softc->device_stats); 427 428 destroy_dev(softc->dev); 429 430 cam_extend_release(ptperiphs, periph->unit_number); 431 xpt_print_path(periph->path); 432 printf("removing device entry\n"); 433 free(softc, M_DEVBUF); 434 } 435 436 static void 437 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg) 438 { 439 struct cam_periph *periph; 440 441 periph = (struct cam_periph *)callback_arg; 442 switch (code) { 443 case AC_FOUND_DEVICE: 444 { 445 struct ccb_getdev *cgd; 446 cam_status status; 447 448 cgd = (struct ccb_getdev *)arg; 449 if (cgd == NULL) 450 break; 451 452 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR) 453 break; 454 455 /* 456 * Allocate a peripheral instance for 457 * this device and start the probe 458 * process. 459 */ 460 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor, 461 ptstart, "pt", CAM_PERIPH_BIO, 462 cgd->ccb_h.path, ptasync, 463 AC_FOUND_DEVICE, cgd); 464 465 if (status != CAM_REQ_CMP 466 && status != CAM_REQ_INPROG) 467 printf("ptasync: Unable to attach to new device " 468 "due to status 0x%x\n", status); 469 break; 470 } 471 case AC_SENT_BDR: 472 case AC_BUS_RESET: 473 { 474 struct pt_softc *softc; 475 struct ccb_hdr *ccbh; 476 int s; 477 478 softc = (struct pt_softc *)periph->softc; 479 s = splsoftcam(); 480 /* 481 * Don't fail on the expected unit attention 482 * that will occur. 483 */ 484 softc->flags |= PT_FLAG_RETRY_UA; 485 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le) 486 ccbh->ccb_state |= PT_CCB_RETRY_UA; 487 splx(s); 488 /* FALLTHROUGH */ 489 } 490 default: 491 cam_periph_async(periph, code, path, arg); 492 break; 493 } 494 } 495 496 static void 497 ptstart(struct cam_periph *periph, union ccb *start_ccb) 498 { 499 struct pt_softc *softc; 500 struct bio *bp; 501 int s; 502 503 softc = (struct pt_softc *)periph->softc; 504 505 /* 506 * See if there is a buf with work for us to do.. 507 */ 508 s = splbio(); 509 bp = bioq_first(&softc->bio_queue); 510 if (periph->immediate_priority <= periph->pinfo.priority) { 511 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE, 512 ("queuing for immediate ccb\n")); 513 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING; 514 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 515 periph_links.sle); 516 periph->immediate_priority = CAM_PRIORITY_NONE; 517 splx(s); 518 wakeup(&periph->ccb_list); 519 } else if (bp == NULL) { 520 splx(s); 521 xpt_release_ccb(start_ccb); 522 } else { 523 int oldspl; 524 525 bioq_remove(&softc->bio_queue, bp); 526 527 devstat_start_transaction(&softc->device_stats); 528 529 scsi_send_receive(&start_ccb->csio, 530 /*retries*/4, 531 ptdone, 532 MSG_SIMPLE_Q_TAG, 533 bp->bio_cmd == BIO_READ, 534 /*byte2*/0, 535 bp->bio_bcount, 536 bp->bio_data, 537 /*sense_len*/SSD_FULL_SIZE, 538 /*timeout*/softc->io_timeout); 539 540 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO_UA; 541 542 /* 543 * Block out any asyncronous callbacks 544 * while we touch the pending ccb list. 545 */ 546 oldspl = splcam(); 547 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h, 548 periph_links.le); 549 splx(oldspl); 550 551 start_ccb->ccb_h.ccb_bp = bp; 552 bp = bioq_first(&softc->bio_queue); 553 splx(s); 554 555 xpt_action(start_ccb); 556 557 if (bp != NULL) { 558 /* Have more work to do, so ensure we stay scheduled */ 559 xpt_schedule(periph, /* XXX priority */1); 560 } 561 } 562 } 563 564 static void 565 ptdone(struct cam_periph *periph, union ccb *done_ccb) 566 { 567 struct pt_softc *softc; 568 struct ccb_scsiio *csio; 569 570 softc = (struct pt_softc *)periph->softc; 571 csio = &done_ccb->csio; 572 switch (csio->ccb_h.ccb_state) { 573 case PT_CCB_BUFFER_IO: 574 case PT_CCB_BUFFER_IO_UA: 575 { 576 struct bio *bp; 577 int oldspl; 578 579 bp = (struct bio *)done_ccb->ccb_h.ccb_bp; 580 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 581 int error; 582 int s; 583 int sf; 584 585 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0) 586 sf = SF_RETRY_UA; 587 else 588 sf = 0; 589 590 error = pterror(done_ccb, CAM_RETRY_SELTO, sf); 591 if (error == ERESTART) { 592 /* 593 * A retry was scheuled, so 594 * just return. 595 */ 596 return; 597 } 598 if (error != 0) { 599 struct bio *q_bp; 600 601 s = splbio(); 602 603 if (error == ENXIO) { 604 /* 605 * Catastrophic error. Mark our device 606 * as invalid. 607 */ 608 xpt_print_path(periph->path); 609 printf("Invalidating device\n"); 610 softc->flags |= PT_FLAG_DEVICE_INVALID; 611 } 612 613 /* 614 * return all queued I/O with EIO, so that 615 * the client can retry these I/Os in the 616 * proper order should it attempt to recover. 617 */ 618 while ((q_bp = bioq_first(&softc->bio_queue)) 619 != NULL) { 620 bioq_remove(&softc->bio_queue, q_bp); 621 q_bp->bio_resid = q_bp->bio_bcount; 622 biofinish(q_bp, NULL, EIO); 623 } 624 splx(s); 625 bp->bio_error = error; 626 bp->bio_resid = bp->bio_bcount; 627 bp->bio_flags |= BIO_ERROR; 628 } else { 629 bp->bio_resid = csio->resid; 630 bp->bio_error = 0; 631 if (bp->bio_resid != 0) { 632 /* Short transfer ??? */ 633 bp->bio_flags |= BIO_ERROR; 634 } 635 } 636 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 637 cam_release_devq(done_ccb->ccb_h.path, 638 /*relsim_flags*/0, 639 /*reduction*/0, 640 /*timeout*/0, 641 /*getcount_only*/0); 642 } else { 643 bp->bio_resid = csio->resid; 644 if (bp->bio_resid != 0) 645 bp->bio_flags |= BIO_ERROR; 646 } 647 648 /* 649 * Block out any asyncronous callbacks 650 * while we touch the pending ccb list. 651 */ 652 oldspl = splcam(); 653 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le); 654 splx(oldspl); 655 656 biofinish(bp, &softc->device_stats, 0); 657 break; 658 } 659 case PT_CCB_WAITING: 660 /* Caller will release the CCB */ 661 wakeup(&done_ccb->ccb_h.cbfcnp); 662 return; 663 } 664 xpt_release_ccb(done_ccb); 665 } 666 667 static int 668 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 669 { 670 struct pt_softc *softc; 671 struct cam_periph *periph; 672 673 periph = xpt_path_periph(ccb->ccb_h.path); 674 softc = (struct pt_softc *)periph->softc; 675 676 return(cam_periph_error(ccb, cam_flags, sense_flags, 677 &softc->saved_ccb)); 678 } 679 680 static int 681 ptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 682 { 683 struct cam_periph *periph; 684 struct pt_softc *softc; 685 int unit; 686 int error; 687 688 unit = minor(dev); 689 periph = cam_extend_get(ptperiphs, unit); 690 691 if (periph == NULL) 692 return(ENXIO); 693 694 softc = (struct pt_softc *)periph->softc; 695 696 if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) { 697 return (error); /* error code from tsleep */ 698 } 699 700 switch(cmd) { 701 case PTIOCGETTIMEOUT: 702 if (softc->io_timeout >= 1000) 703 *(int *)addr = softc->io_timeout / 1000; 704 else 705 *(int *)addr = 0; 706 break; 707 case PTIOCSETTIMEOUT: 708 { 709 int s; 710 711 if (*(int *)addr < 1) { 712 error = EINVAL; 713 break; 714 } 715 716 s = splsoftcam(); 717 softc->io_timeout = *(int *)addr * 1000; 718 splx(s); 719 720 break; 721 } 722 default: 723 error = cam_periph_ioctl(periph, cmd, addr, pterror); 724 break; 725 } 726 727 cam_periph_unlock(periph); 728 729 return(error); 730 } 731 732 void 733 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 734 void (*cbfcnp)(struct cam_periph *, union ccb *), 735 u_int tag_action, int readop, u_int byte2, 736 u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len, 737 u_int32_t timeout) 738 { 739 struct scsi_send_receive *scsi_cmd; 740 741 scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes; 742 scsi_cmd->opcode = readop ? RECEIVE : SEND; 743 scsi_cmd->byte2 = byte2; 744 scsi_ulto3b(xfer_len, scsi_cmd->xfer_len); 745 scsi_cmd->control = 0; 746 747 cam_fill_csio(csio, 748 retries, 749 cbfcnp, 750 /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT, 751 tag_action, 752 data_ptr, 753 xfer_len, 754 sense_len, 755 sizeof(*scsi_cmd), 756 timeout); 757 } 758