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 * $Id: scsi_pt.c,v 1.3 1998/10/22 22:16:56 ken Exp $ 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/buf.h> 37 #include <sys/devicestat.h> 38 #include <sys/malloc.h> 39 #include <sys/conf.h> 40 41 #include <cam/cam.h> 42 #include <cam/cam_ccb.h> 43 #include <cam/cam_extend.h> 44 #include <cam/cam_periph.h> 45 #include <cam/cam_xpt_periph.h> 46 #include <cam/cam_debug.h> 47 48 #include <cam/scsi/scsi_all.h> 49 #include <cam/scsi/scsi_message.h> 50 #include <cam/scsi/scsi_pt.h> 51 52 typedef enum { 53 PT_STATE_PROBE, 54 PT_STATE_NORMAL 55 } pt_state; 56 57 typedef enum { 58 PT_FLAG_NONE = 0x00, 59 PT_FLAG_OPEN = 0x01, 60 PT_FLAG_DEVICE_INVALID = 0x02, 61 PT_FLAG_RETRY_UA = 0x04 62 } pt_flags; 63 64 typedef enum { 65 PT_CCB_BUFFER_IO = 0x01, 66 PT_CCB_WAITING = 0x02, 67 PT_CCB_RETRY_UA = 0x04, 68 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA 69 } pt_ccb_state; 70 71 /* Offsets into our private area for storing information */ 72 #define ccb_state ppriv_field0 73 #define ccb_bp ppriv_ptr1 74 75 struct pt_softc { 76 struct buf_queue_head buf_queue; 77 struct devstat device_stats; 78 LIST_HEAD(, ccb_hdr) pending_ccbs; 79 pt_state state; 80 pt_flags flags; 81 union ccb saved_ccb; 82 }; 83 84 static d_open_t ptopen; 85 static d_read_t ptread; 86 static d_write_t ptwrite; 87 static d_close_t ptclose; 88 static d_strategy_t ptstrategy; 89 static periph_init_t ptinit; 90 static void ptasync(void *callback_arg, u_int32_t code, 91 struct cam_path *path, void *arg); 92 static periph_ctor_t ptctor; 93 static periph_oninv_t ptoninvalidate; 94 static periph_dtor_t ptdtor; 95 static periph_start_t ptstart; 96 static void ptdone(struct cam_periph *periph, 97 union ccb *done_ccb); 98 static int pterror(union ccb *ccb, u_int32_t cam_flags, 99 u_int32_t sense_flags); 100 101 void scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 102 void (*cbfcnp)(struct cam_periph *, union ccb *), 103 u_int tag_action, int readop, u_int byte2, 104 u_int32_t xfer_len, u_int8_t *data_ptr, 105 u_int8_t sense_len, u_int32_t timeout); 106 107 static struct periph_driver ptdriver = 108 { 109 ptinit, "pt", 110 TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0 111 }; 112 113 DATA_SET(periphdriver_set, ptdriver); 114 115 #define PT_CDEV_MAJOR 61 116 117 static struct cdevsw pt_cdevsw = 118 { 119 /*d_open*/ ptopen, 120 /*d_close*/ ptclose, 121 /*d_read*/ ptread, 122 /*d_write*/ ptwrite, 123 /*d_ioctl*/ noioctl, 124 /*d_stop*/ nostop, 125 /*d_reset*/ noreset, 126 /*d_devtotty*/ nodevtotty, 127 /*d_poll*/ seltrue, 128 /*d_mmap*/ nommap, 129 /*d_strategy*/ ptstrategy, 130 /*d_name*/ "pt", 131 /*d_spare*/ NULL, 132 /*d_maj*/ -1, 133 /*d_dump*/ nodump, 134 /*d_psize*/ nopsize, 135 /*d_flags*/ 0, 136 /*d_maxio*/ 0, 137 /*b_maj*/ -1 138 }; 139 140 static struct extend_array *ptperiphs; 141 142 static int 143 ptopen(dev_t dev, int flags, int fmt, struct proc *p) 144 { 145 struct cam_periph *periph; 146 struct pt_softc *softc; 147 int unit; 148 int error; 149 int s; 150 151 unit = minor(dev); 152 periph = cam_extend_get(ptperiphs, unit); 153 if (periph == NULL) 154 return (ENXIO); 155 156 softc = (struct pt_softc *)periph->softc; 157 158 s = splsoftcam(); 159 if (softc->flags & PT_FLAG_DEVICE_INVALID) { 160 splx(s); 161 return(ENXIO); 162 } 163 164 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 165 ("ptopen: dev=0x%x (unit %d)\n", dev, unit)); 166 167 if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) { 168 splx(s); 169 return (error); /* error code from tsleep */ 170 } 171 172 splx(s); 173 174 if ((softc->flags & PT_FLAG_OPEN) == 0) { 175 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 176 error = ENXIO; 177 else 178 softc->flags |= PT_FLAG_OPEN; 179 } else 180 error = EBUSY; 181 182 cam_periph_unlock(periph); 183 return (error); 184 } 185 186 static int 187 ptclose(dev_t dev, int flag, int fmt, struct proc *p) 188 { 189 struct cam_periph *periph; 190 struct pt_softc *softc; 191 int unit; 192 int error; 193 194 unit = minor(dev); 195 periph = cam_extend_get(ptperiphs, unit); 196 if (periph == NULL) 197 return (ENXIO); 198 199 softc = (struct pt_softc *)periph->softc; 200 201 if ((error = cam_periph_lock(periph, PRIBIO)) != 0) 202 return (error); /* error code from tsleep */ 203 204 softc->flags &= ~PT_FLAG_OPEN; 205 cam_periph_unlock(periph); 206 cam_periph_release(periph); 207 return (0); 208 } 209 210 static int 211 ptread(dev_t dev, struct uio *uio, int ioflag) 212 { 213 return(physio(ptstrategy, NULL, dev, 1, minphys, uio)); 214 } 215 216 static int 217 ptwrite(dev_t dev, struct uio *uio, int ioflag) 218 { 219 return(physio(ptstrategy, NULL, dev, 0, minphys, uio)); 220 } 221 222 /* 223 * Actually translate the requested transfer into one the physical driver 224 * can understand. The transfer is described by a buf and will include 225 * only one physical transfer. 226 */ 227 static void 228 ptstrategy(struct buf *bp) 229 { 230 struct cam_periph *periph; 231 struct pt_softc *softc; 232 u_int unit; 233 int s; 234 235 unit = minor(bp->b_dev); 236 periph = cam_extend_get(ptperiphs, unit); 237 if (periph == NULL) { 238 bp->b_error = ENXIO; 239 goto bad; 240 } 241 softc = (struct pt_softc *)periph->softc; 242 243 /* 244 * Mask interrupts so that the pack cannot be invalidated until 245 * after we are in the queue. Otherwise, we might not properly 246 * clean up one of the buffers. 247 */ 248 s = splbio(); 249 250 /* 251 * If the device has been made invalid, error out 252 */ 253 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) { 254 splx(s); 255 bp->b_error = ENXIO; 256 goto bad; 257 } 258 259 /* 260 * Place it in the queue of disk activities for this disk 261 */ 262 bufq_insert_tail(&softc->buf_queue, bp); 263 264 splx(s); 265 266 /* 267 * Schedule ourselves for performing the work. 268 */ 269 xpt_schedule(periph, /* XXX priority */1); 270 271 return; 272 bad: 273 bp->b_flags |= B_ERROR; 274 275 /* 276 * Correctly set the buf to indicate a completed xfer 277 */ 278 bp->b_resid = bp->b_bcount; 279 biodone(bp); 280 } 281 282 static void 283 ptinit(void) 284 { 285 cam_status status; 286 struct cam_path *path; 287 288 /* 289 * Create our extend array for storing the devices we attach to. 290 */ 291 ptperiphs = cam_extend_new(); 292 if (ptperiphs == NULL) { 293 printf("pt: Failed to alloc extend array!\n"); 294 return; 295 } 296 297 /* 298 * Install a global async callback. This callback will 299 * receive async callbacks like "new device found". 300 */ 301 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 302 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 303 304 if (status == CAM_REQ_CMP) { 305 struct ccb_setasync csa; 306 307 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 308 csa.ccb_h.func_code = XPT_SASYNC_CB; 309 csa.event_enable = AC_FOUND_DEVICE; 310 csa.callback = ptasync; 311 csa.callback_arg = NULL; 312 xpt_action((union ccb *)&csa); 313 status = csa.ccb_h.status; 314 xpt_free_path(path); 315 } 316 317 if (status != CAM_REQ_CMP) { 318 printf("pt: Failed to attach master async callback " 319 "due to status 0x%x!\n", status); 320 } else { 321 /* If we were successfull, register our devsw */ 322 dev_t dev; 323 324 dev = makedev(PT_CDEV_MAJOR, 0); 325 cdevsw_add(&dev,&pt_cdevsw, NULL); 326 } 327 } 328 329 static cam_status 330 ptctor(struct cam_periph *periph, void *arg) 331 { 332 struct pt_softc *softc; 333 struct ccb_setasync csa; 334 struct ccb_getdev *cgd; 335 336 cgd = (struct ccb_getdev *)arg; 337 if (periph == NULL) { 338 printf("ptregister: periph was NULL!!\n"); 339 return(CAM_REQ_CMP_ERR); 340 } 341 342 if (cgd == NULL) { 343 printf("ptregister: no getdev CCB, can't register device\n"); 344 return(CAM_REQ_CMP_ERR); 345 } 346 347 softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT); 348 349 if (softc == NULL) { 350 printf("daregister: Unable to probe new device. " 351 "Unable to allocate softc\n"); 352 return(CAM_REQ_CMP_ERR); 353 } 354 355 bzero(softc, sizeof(*softc)); 356 LIST_INIT(&softc->pending_ccbs); 357 softc->state = PT_STATE_NORMAL; 358 bufq_init(&softc->buf_queue); 359 360 periph->softc = softc; 361 362 cam_extend_set(ptperiphs, periph->unit_number, periph); 363 364 /* 365 * The DA driver supports a blocksize, but 366 * we don't know the blocksize until we do 367 * a read capacity. So, set a flag to 368 * indicate that the blocksize is 369 * unavailable right now. We'll clear the 370 * flag as soon as we've done a read capacity. 371 */ 372 devstat_add_entry(&softc->device_stats, "pt", 373 periph->unit_number, 0, 374 DEVSTAT_NO_BLOCKSIZE, 375 cgd->pd_type | DEVSTAT_TYPE_IF_SCSI); 376 377 /* 378 * Add async callbacks for bus reset and 379 * bus device reset calls. I don't bother 380 * checking if this fails as, in most cases, 381 * the system will function just fine without 382 * them and the only alternative would be to 383 * not attach the device on failure. 384 */ 385 xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5); 386 csa.ccb_h.func_code = XPT_SASYNC_CB; 387 csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE; 388 csa.callback = ptasync; 389 csa.callback_arg = periph; 390 xpt_action((union ccb *)&csa); 391 392 /* Tell the user we've attached to the device */ 393 xpt_announce_periph(periph, NULL); 394 395 return(CAM_REQ_CMP); 396 } 397 398 static void 399 ptoninvalidate(struct cam_periph *periph) 400 { 401 int s; 402 struct pt_softc *softc; 403 struct buf *q_bp; 404 struct ccb_setasync csa; 405 406 softc = (struct pt_softc *)periph->softc; 407 408 /* 409 * De-register any async callbacks. 410 */ 411 xpt_setup_ccb(&csa.ccb_h, periph->path, 412 /* priority */ 5); 413 csa.ccb_h.func_code = XPT_SASYNC_CB; 414 csa.event_enable = 0; 415 csa.callback = ptasync; 416 csa.callback_arg = periph; 417 xpt_action((union ccb *)&csa); 418 419 softc->flags |= PT_FLAG_DEVICE_INVALID; 420 421 /* 422 * Although the oninvalidate() routines are always called at 423 * splsoftcam, we need to be at splbio() here to keep the buffer 424 * queue from being modified while we traverse it. 425 */ 426 s = splbio(); 427 428 /* 429 * Return all queued I/O with ENXIO. 430 * XXX Handle any transactions queued to the card 431 * with XPT_ABORT_CCB. 432 */ 433 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 434 bufq_remove(&softc->buf_queue, q_bp); 435 q_bp->b_resid = q_bp->b_bcount; 436 q_bp->b_error = ENXIO; 437 q_bp->b_flags |= B_ERROR; 438 biodone(q_bp); 439 } 440 441 splx(s); 442 443 xpt_print_path(periph->path); 444 printf("lost device\n"); 445 } 446 447 static void 448 ptdtor(struct cam_periph *periph) 449 { 450 struct pt_softc *softc; 451 452 softc = (struct pt_softc *)periph->softc; 453 454 devstat_remove_entry(&softc->device_stats); 455 456 cam_extend_release(ptperiphs, periph->unit_number); 457 xpt_print_path(periph->path); 458 printf("removing device entry\n"); 459 free(softc, M_DEVBUF); 460 } 461 462 static void 463 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg) 464 { 465 struct cam_periph *periph; 466 467 periph = (struct cam_periph *)callback_arg; 468 switch (code) { 469 case AC_FOUND_DEVICE: 470 { 471 struct ccb_getdev *cgd; 472 cam_status status; 473 474 cgd = (struct ccb_getdev *)arg; 475 476 if (cgd->pd_type != T_PROCESSOR) 477 break; 478 479 /* 480 * Allocate a peripheral instance for 481 * this device and start the probe 482 * process. 483 */ 484 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor, 485 ptstart, "pt", CAM_PERIPH_BIO, 486 cgd->ccb_h.path, ptasync, 487 AC_FOUND_DEVICE, cgd); 488 489 if (status != CAM_REQ_CMP 490 && status != CAM_REQ_INPROG) 491 printf("ptasync: Unable to attach to new device " 492 "due to status 0x%x\n", status); 493 break; 494 } 495 case AC_LOST_DEVICE: 496 { 497 cam_periph_invalidate(periph); 498 break; 499 } 500 case AC_SENT_BDR: 501 case AC_BUS_RESET: 502 { 503 struct pt_softc *softc; 504 struct ccb_hdr *ccbh; 505 int s; 506 507 softc = (struct pt_softc *)periph->softc; 508 s = splsoftcam(); 509 /* 510 * Don't fail on the expected unit attention 511 * that will occur. 512 */ 513 softc->flags |= PT_FLAG_RETRY_UA; 514 for (ccbh = LIST_FIRST(&softc->pending_ccbs); 515 ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le)) 516 ccbh->ccb_state |= PT_CCB_RETRY_UA; 517 splx(s); 518 break; 519 } 520 case AC_TRANSFER_NEG: 521 case AC_SCSI_AEN: 522 case AC_UNSOL_RESEL: 523 default: 524 break; 525 } 526 } 527 528 static void 529 ptstart(struct cam_periph *periph, union ccb *start_ccb) 530 { 531 struct pt_softc *softc; 532 struct buf *bp; 533 int s; 534 535 softc = (struct pt_softc *)periph->softc; 536 537 /* 538 * See if there is a buf with work for us to do.. 539 */ 540 s = splbio(); 541 bp = bufq_first(&softc->buf_queue); 542 if (periph->immediate_priority <= periph->pinfo.priority) { 543 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE, 544 ("queuing for immediate ccb\n")); 545 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING; 546 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 547 periph_links.sle); 548 periph->immediate_priority = CAM_PRIORITY_NONE; 549 splx(s); 550 wakeup(&periph->ccb_list); 551 } else if (bp == NULL) { 552 splx(s); 553 xpt_release_ccb(start_ccb); 554 } else { 555 int oldspl; 556 557 bufq_remove(&softc->buf_queue, bp); 558 559 devstat_start_transaction(&softc->device_stats); 560 561 scsi_send_receive(&start_ccb->csio, 562 /*retries*/4, 563 ptdone, 564 MSG_SIMPLE_Q_TAG, 565 bp->b_flags & B_READ, 566 /*byte2*/0, 567 bp->b_bcount, 568 bp->b_data, 569 /*sense_len*/SSD_FULL_SIZE, 570 /*timeout*/10000); 571 572 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO; 573 574 /* 575 * Block out any asyncronous callbacks 576 * while we touch the pending ccb list. 577 */ 578 oldspl = splcam(); 579 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h, 580 periph_links.le); 581 splx(oldspl); 582 583 start_ccb->ccb_h.ccb_bp = bp; 584 bp = bufq_first(&softc->buf_queue); 585 splx(s); 586 587 xpt_action(start_ccb); 588 589 if (bp != NULL) { 590 /* Have more work to do, so ensure we stay scheduled */ 591 xpt_schedule(periph, /* XXX priority */1); 592 } 593 } 594 } 595 596 static void 597 ptdone(struct cam_periph *periph, union ccb *done_ccb) 598 { 599 struct pt_softc *softc; 600 struct ccb_scsiio *csio; 601 602 softc = (struct pt_softc *)periph->softc; 603 csio = &done_ccb->csio; 604 switch (csio->ccb_h.ccb_state) { 605 case PT_CCB_BUFFER_IO: 606 case PT_CCB_BUFFER_IO_UA: 607 { 608 struct buf *bp; 609 int oldspl; 610 611 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 612 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 613 int error; 614 int s; 615 int sf; 616 617 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0) 618 sf = SF_RETRY_UA; 619 else 620 sf = 0; 621 622 if ((error = pterror(done_ccb, 0, sf)) == ERESTART) { 623 /* 624 * A retry was scheuled, so 625 * just return. 626 */ 627 return; 628 } 629 if (error != 0) { 630 struct buf *q_bp; 631 632 s = splbio(); 633 634 if (error == ENXIO) { 635 /* 636 * Catastrophic error. Mark our device 637 * as invalid. 638 */ 639 xpt_print_path(periph->path); 640 printf("Invalidating device\n"); 641 softc->flags |= PT_FLAG_DEVICE_INVALID; 642 } 643 644 /* 645 * return all queued I/O with EIO, so that 646 * the client can retry these I/Os in the 647 * proper order should it attempt to recover. 648 */ 649 while ((q_bp = bufq_first(&softc->buf_queue)) 650 != NULL) { 651 bufq_remove(&softc->buf_queue, q_bp); 652 q_bp->b_resid = q_bp->b_bcount; 653 q_bp->b_error = EIO; 654 q_bp->b_flags |= B_ERROR; 655 biodone(q_bp); 656 } 657 splx(s); 658 bp->b_error = error; 659 bp->b_resid = bp->b_bcount; 660 bp->b_flags |= B_ERROR; 661 } else { 662 bp->b_resid = csio->resid; 663 bp->b_error = 0; 664 if (bp->b_resid != 0) { 665 /* Short transfer ??? */ 666 bp->b_flags |= B_ERROR; 667 } 668 } 669 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 670 cam_release_devq(done_ccb->ccb_h.path, 671 /*relsim_flags*/0, 672 /*reduction*/0, 673 /*timeout*/0, 674 /*getcount_only*/0); 675 } else { 676 bp->b_resid = csio->resid; 677 if (bp->b_resid != 0) 678 bp->b_flags |= B_ERROR; 679 } 680 681 /* 682 * Block out any asyncronous callbacks 683 * while we touch the pending ccb list. 684 */ 685 oldspl = splcam(); 686 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le); 687 splx(oldspl); 688 689 devstat_end_transaction(&softc->device_stats, 690 bp->b_bcount - bp->b_resid, 691 done_ccb->csio.tag_action & 0xf, 692 (bp->b_flags & B_READ) ? DEVSTAT_READ 693 : DEVSTAT_WRITE); 694 695 biodone(bp); 696 break; 697 } 698 case PT_CCB_WAITING: 699 /* Caller will release the CCB */ 700 wakeup(&done_ccb->ccb_h.cbfcnp); 701 return; 702 } 703 xpt_release_ccb(done_ccb); 704 } 705 706 static int 707 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 708 { 709 struct pt_softc *softc; 710 struct cam_periph *periph; 711 712 periph = xpt_path_periph(ccb->ccb_h.path); 713 softc = (struct pt_softc *)periph->softc; 714 715 return(cam_periph_error(ccb, cam_flags, sense_flags, 716 &softc->saved_ccb)); 717 } 718 719 void 720 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 721 void (*cbfcnp)(struct cam_periph *, union ccb *), 722 u_int tag_action, int readop, u_int byte2, 723 u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len, 724 u_int32_t timeout) 725 { 726 struct scsi_send_receive *scsi_cmd; 727 728 scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes; 729 scsi_cmd->opcode = readop ? RECEIVE : SEND; 730 scsi_cmd->byte2 = byte2; 731 scsi_ulto3b(xfer_len, scsi_cmd->xfer_len); 732 scsi_cmd->control = 0; 733 734 cam_fill_csio(csio, 735 retries, 736 cbfcnp, 737 /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT, 738 tag_action, 739 data_ptr, 740 xfer_len, 741 sense_len, 742 sizeof(*scsi_cmd), 743 timeout); 744 } 745