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: src/sys/cam/scsi/scsi_pt.c,v 1.17 2000/01/17 06:27:37 mjacob Exp $ 29 * $DragonFly: src/sys/bus/cam/scsi/scsi_pt.c,v 1.12 2005/06/02 20:40:31 dillon Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/queue.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/types.h> 37 #include <sys/buf.h> 38 #include <sys/devicestat.h> 39 #include <sys/malloc.h> 40 #include <sys/conf.h> 41 #include <sys/ptio.h> 42 #include <sys/buf2.h> 43 #include <sys/thread2.h> 44 45 #include "../cam.h" 46 #include "../cam_ccb.h" 47 #include "../cam_extend.h" 48 #include "../cam_periph.h" 49 #include "../cam_xpt_periph.h" 50 #include "../cam_debug.h" 51 52 #include "scsi_all.h" 53 #include "scsi_message.h" 54 #include "scsi_pt.h" 55 56 #include "opt_pt.h" 57 58 typedef enum { 59 PT_STATE_PROBE, 60 PT_STATE_NORMAL 61 } pt_state; 62 63 typedef enum { 64 PT_FLAG_NONE = 0x00, 65 PT_FLAG_OPEN = 0x01, 66 PT_FLAG_DEVICE_INVALID = 0x02, 67 PT_FLAG_RETRY_UA = 0x04 68 } pt_flags; 69 70 typedef enum { 71 PT_CCB_BUFFER_IO = 0x01, 72 PT_CCB_WAITING = 0x02, 73 PT_CCB_RETRY_UA = 0x04, 74 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA 75 } pt_ccb_state; 76 77 /* Offsets into our private area for storing information */ 78 #define ccb_state ppriv_field0 79 #define ccb_bp ppriv_ptr1 80 81 struct pt_softc { 82 struct buf_queue_head buf_queue; 83 struct devstat device_stats; 84 LIST_HEAD(, ccb_hdr) pending_ccbs; 85 pt_state state; 86 pt_flags flags; 87 union ccb saved_ccb; 88 int io_timeout; 89 dev_t dev; 90 }; 91 92 static d_open_t ptopen; 93 static d_close_t ptclose; 94 static d_strategy_t ptstrategy; 95 static periph_init_t ptinit; 96 static void ptasync(void *callback_arg, u_int32_t code, 97 struct cam_path *path, void *arg); 98 static periph_ctor_t ptctor; 99 static periph_oninv_t ptoninvalidate; 100 static periph_dtor_t ptdtor; 101 static periph_start_t ptstart; 102 static void ptdone(struct cam_periph *periph, 103 union ccb *done_ccb); 104 static d_ioctl_t ptioctl; 105 static int pterror(union ccb *ccb, u_int32_t cam_flags, 106 u_int32_t sense_flags); 107 108 void scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 109 void (*cbfcnp)(struct cam_periph *, union ccb *), 110 u_int tag_action, int readop, u_int byte2, 111 u_int32_t xfer_len, u_int8_t *data_ptr, 112 u_int8_t sense_len, u_int32_t timeout); 113 114 static struct periph_driver ptdriver = 115 { 116 ptinit, "pt", 117 TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0 118 }; 119 120 DATA_SET(periphdriver_set, ptdriver); 121 122 #define PT_CDEV_MAJOR 61 123 124 static struct cdevsw pt_cdevsw = { 125 /* name */ "pt", 126 /* maj */ PT_CDEV_MAJOR, 127 /* flags */ 0, 128 /* port */ NULL, 129 /* clone */ NULL, 130 131 /* open */ ptopen, 132 /* close */ ptclose, 133 /* read */ physread, 134 /* write */ physwrite, 135 /* ioctl */ ptioctl, 136 /* poll */ nopoll, 137 /* mmap */ nommap, 138 /* strategy */ ptstrategy, 139 /* dump */ nodump, 140 /* psize */ nopsize 141 }; 142 143 static struct extend_array *ptperiphs; 144 145 #ifndef SCSI_PT_DEFAULT_TIMEOUT 146 #define SCSI_PT_DEFAULT_TIMEOUT 60 147 #endif 148 149 static int 150 ptopen(dev_t dev, int flags, int fmt, struct thread *td) 151 { 152 struct cam_periph *periph; 153 struct pt_softc *softc; 154 int unit; 155 int error; 156 157 unit = minor(dev); 158 periph = cam_extend_get(ptperiphs, unit); 159 if (periph == NULL) 160 return (ENXIO); 161 162 softc = (struct pt_softc *)periph->softc; 163 164 crit_enter(); 165 if (softc->flags & PT_FLAG_DEVICE_INVALID) { 166 crit_exit(); 167 return(ENXIO); 168 } 169 170 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 171 ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit)); 172 173 if ((error = cam_periph_lock(periph, PCATCH)) != 0) { 174 crit_exit(); 175 return (error); /* error code from tsleep */ 176 } 177 178 crit_exit(); 179 180 if ((softc->flags & PT_FLAG_OPEN) == 0) { 181 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 182 error = ENXIO; 183 else 184 softc->flags |= PT_FLAG_OPEN; 185 } else 186 error = EBUSY; 187 188 cam_periph_unlock(periph); 189 return (error); 190 } 191 192 static int 193 ptclose(dev_t dev, int flag, int fmt, struct thread *td) 194 { 195 struct cam_periph *periph; 196 struct pt_softc *softc; 197 int unit; 198 int error; 199 200 unit = minor(dev); 201 periph = cam_extend_get(ptperiphs, unit); 202 if (periph == NULL) 203 return (ENXIO); 204 205 softc = (struct pt_softc *)periph->softc; 206 207 if ((error = cam_periph_lock(periph, 0)) != 0) 208 return (error); /* error code from tsleep */ 209 210 softc->flags &= ~PT_FLAG_OPEN; 211 cam_periph_unlock(periph); 212 cam_periph_release(periph); 213 return (0); 214 } 215 216 /* 217 * Actually translate the requested transfer into one the physical driver 218 * can understand. The transfer is described by a buf and will include 219 * only one physical transfer. 220 */ 221 static void 222 ptstrategy(struct buf *bp) 223 { 224 struct cam_periph *periph; 225 struct pt_softc *softc; 226 u_int unit; 227 228 unit = minor(bp->b_dev); 229 periph = cam_extend_get(ptperiphs, unit); 230 if (periph == NULL) { 231 bp->b_error = ENXIO; 232 goto bad; 233 } 234 softc = (struct pt_softc *)periph->softc; 235 236 /* 237 * Mask interrupts so that the pack cannot be invalidated until 238 * after we are in the queue. Otherwise, we might not properly 239 * clean up one of the buffers. 240 */ 241 crit_enter(); 242 243 /* 244 * If the device has been made invalid, error out 245 */ 246 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) { 247 crit_exit(); 248 bp->b_error = ENXIO; 249 goto bad; 250 } 251 252 /* 253 * Place it in the queue of disk activities for this disk 254 */ 255 bufq_insert_tail(&softc->buf_queue, bp); 256 257 crit_exit(); 258 259 /* 260 * Schedule ourselves for performing the work. 261 */ 262 xpt_schedule(periph, /* XXX priority */1); 263 264 return; 265 bad: 266 bp->b_flags |= B_ERROR; 267 268 /* 269 * Correctly set the buf to indicate a completed xfer 270 */ 271 bp->b_resid = bp->b_bcount; 272 biodone(bp); 273 } 274 275 static void 276 ptinit(void) 277 { 278 cam_status status; 279 struct cam_path *path; 280 281 /* 282 * Create our extend array for storing the devices we attach to. 283 */ 284 ptperiphs = cam_extend_new(); 285 if (ptperiphs == NULL) { 286 printf("pt: Failed to alloc extend array!\n"); 287 return; 288 } 289 290 /* 291 * Install a global async callback. This callback will 292 * receive async callbacks like "new device found". 293 */ 294 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 295 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 296 297 if (status == CAM_REQ_CMP) { 298 struct ccb_setasync csa; 299 300 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 301 csa.ccb_h.func_code = XPT_SASYNC_CB; 302 csa.event_enable = AC_FOUND_DEVICE; 303 csa.callback = ptasync; 304 csa.callback_arg = NULL; 305 xpt_action((union ccb *)&csa); 306 status = csa.ccb_h.status; 307 xpt_free_path(path); 308 } 309 310 if (status != CAM_REQ_CMP) { 311 printf("pt: Failed to attach master async callback " 312 "due to status 0x%x!\n", status); 313 } 314 } 315 316 static cam_status 317 ptctor(struct cam_periph *periph, void *arg) 318 { 319 struct pt_softc *softc; 320 struct ccb_setasync csa; 321 struct ccb_getdev *cgd; 322 323 cgd = (struct ccb_getdev *)arg; 324 if (periph == NULL) { 325 printf("ptregister: periph was NULL!!\n"); 326 return(CAM_REQ_CMP_ERR); 327 } 328 329 if (cgd == NULL) { 330 printf("ptregister: no getdev CCB, can't register device\n"); 331 return(CAM_REQ_CMP_ERR); 332 } 333 334 softc = malloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO); 335 LIST_INIT(&softc->pending_ccbs); 336 softc->state = PT_STATE_NORMAL; 337 bufq_init(&softc->buf_queue); 338 339 softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000; 340 341 periph->softc = softc; 342 343 cam_extend_set(ptperiphs, periph->unit_number, periph); 344 345 devstat_add_entry(&softc->device_stats, "pt", 346 periph->unit_number, 0, 347 DEVSTAT_NO_BLOCKSIZE, 348 SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI, 349 DEVSTAT_PRIORITY_OTHER); 350 351 cdevsw_add(&pt_cdevsw, -1, periph->unit_number); 352 make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT, 353 GID_OPERATOR, 0600, "%s%d", periph->periph_name, 354 periph->unit_number); 355 /* 356 * Add async callbacks for bus reset and 357 * bus device reset calls. I don't bother 358 * checking if this fails as, in most cases, 359 * the system will function just fine without 360 * them and the only alternative would be to 361 * not attach the device on failure. 362 */ 363 xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5); 364 csa.ccb_h.func_code = XPT_SASYNC_CB; 365 csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE; 366 csa.callback = ptasync; 367 csa.callback_arg = periph; 368 xpt_action((union ccb *)&csa); 369 370 /* Tell the user we've attached to the device */ 371 xpt_announce_periph(periph, NULL); 372 373 return(CAM_REQ_CMP); 374 } 375 376 static void 377 ptoninvalidate(struct cam_periph *periph) 378 { 379 struct pt_softc *softc; 380 struct buf *q_bp; 381 struct ccb_setasync csa; 382 383 softc = (struct pt_softc *)periph->softc; 384 385 /* 386 * De-register any async callbacks. 387 */ 388 xpt_setup_ccb(&csa.ccb_h, periph->path, 389 /* priority */ 5); 390 csa.ccb_h.func_code = XPT_SASYNC_CB; 391 csa.event_enable = 0; 392 csa.callback = ptasync; 393 csa.callback_arg = periph; 394 xpt_action((union ccb *)&csa); 395 396 softc->flags |= PT_FLAG_DEVICE_INVALID; 397 398 /* 399 * We need to be in a critical section here to keep the buffer 400 * queue from being modified while we traverse it. 401 */ 402 crit_enter(); 403 404 /* 405 * Return all queued I/O with ENXIO. 406 * XXX Handle any transactions queued to the card 407 * with XPT_ABORT_CCB. 408 */ 409 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ 410 bufq_remove(&softc->buf_queue, q_bp); 411 q_bp->b_resid = q_bp->b_bcount; 412 q_bp->b_error = ENXIO; 413 q_bp->b_flags |= B_ERROR; 414 biodone(q_bp); 415 } 416 417 crit_exit(); 418 419 xpt_print_path(periph->path); 420 printf("lost device\n"); 421 } 422 423 static void 424 ptdtor(struct cam_periph *periph) 425 { 426 struct pt_softc *softc; 427 428 softc = (struct pt_softc *)periph->softc; 429 430 devstat_remove_entry(&softc->device_stats); 431 432 cam_extend_release(ptperiphs, periph->unit_number); 433 xpt_print_path(periph->path); 434 printf("removing device entry\n"); 435 cdevsw_remove(&pt_cdevsw, -1, periph->unit_number); 436 free(softc, M_DEVBUF); 437 } 438 439 static void 440 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg) 441 { 442 struct cam_periph *periph; 443 444 periph = (struct cam_periph *)callback_arg; 445 switch (code) { 446 case AC_FOUND_DEVICE: 447 { 448 struct ccb_getdev *cgd; 449 cam_status status; 450 451 cgd = (struct ccb_getdev *)arg; 452 453 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR) 454 break; 455 456 /* 457 * Allocate a peripheral instance for 458 * this device and start the probe 459 * process. 460 */ 461 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor, 462 ptstart, "pt", CAM_PERIPH_BIO, 463 cgd->ccb_h.path, ptasync, 464 AC_FOUND_DEVICE, cgd); 465 466 if (status != CAM_REQ_CMP 467 && status != CAM_REQ_INPROG) 468 printf("ptasync: Unable to attach to new device " 469 "due to status 0x%x\n", status); 470 break; 471 } 472 case AC_SENT_BDR: 473 case AC_BUS_RESET: 474 { 475 struct pt_softc *softc; 476 struct ccb_hdr *ccbh; 477 478 softc = (struct pt_softc *)periph->softc; 479 crit_enter(); 480 /* 481 * Don't fail on the expected unit attention 482 * that will occur. 483 */ 484 softc->flags |= PT_FLAG_RETRY_UA; 485 for (ccbh = LIST_FIRST(&softc->pending_ccbs); 486 ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le)) 487 ccbh->ccb_state |= PT_CCB_RETRY_UA; 488 crit_exit(); 489 /* FALLTHROUGH */ 490 } 491 default: 492 cam_periph_async(periph, code, path, arg); 493 break; 494 } 495 } 496 497 static void 498 ptstart(struct cam_periph *periph, union ccb *start_ccb) 499 { 500 struct pt_softc *softc; 501 struct buf *bp; 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 crit_enter(); 509 bp = bufq_first(&softc->buf_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 crit_exit(); 518 wakeup(&periph->ccb_list); 519 } else if (bp == NULL) { 520 crit_exit(); 521 xpt_release_ccb(start_ccb); 522 } else { 523 bufq_remove(&softc->buf_queue, bp); 524 525 devstat_start_transaction(&softc->device_stats); 526 527 scsi_send_receive(&start_ccb->csio, 528 /*retries*/4, 529 ptdone, 530 MSG_SIMPLE_Q_TAG, 531 bp->b_flags & B_READ, 532 /*byte2*/0, 533 bp->b_bcount, 534 bp->b_data, 535 /*sense_len*/SSD_FULL_SIZE, 536 /*timeout*/softc->io_timeout); 537 538 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO; 539 540 /* 541 * Block out any asyncronous callbacks 542 * while we touch the pending ccb list. 543 */ 544 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h, 545 periph_links.le); 546 547 start_ccb->ccb_h.ccb_bp = bp; 548 bp = bufq_first(&softc->buf_queue); 549 crit_exit(); 550 551 xpt_action(start_ccb); 552 553 if (bp != NULL) { 554 /* Have more work to do, so ensure we stay scheduled */ 555 xpt_schedule(periph, /* XXX priority */1); 556 } 557 } 558 } 559 560 static void 561 ptdone(struct cam_periph *periph, union ccb *done_ccb) 562 { 563 struct pt_softc *softc; 564 struct ccb_scsiio *csio; 565 566 softc = (struct pt_softc *)periph->softc; 567 csio = &done_ccb->csio; 568 switch (csio->ccb_h.ccb_state) { 569 case PT_CCB_BUFFER_IO: 570 case PT_CCB_BUFFER_IO_UA: 571 { 572 struct buf *bp; 573 574 bp = (struct buf *)done_ccb->ccb_h.ccb_bp; 575 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 576 int error; 577 int sf; 578 579 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0) 580 sf = SF_RETRY_UA; 581 else 582 sf = 0; 583 584 sf |= SF_RETRY_SELTO; 585 586 if ((error = pterror(done_ccb, 0, sf)) == ERESTART) { 587 /* 588 * A retry was scheuled, so 589 * just return. 590 */ 591 return; 592 } 593 if (error != 0) { 594 struct buf *q_bp; 595 596 crit_enter(); 597 598 if (error == ENXIO) { 599 /* 600 * Catastrophic error. Mark our device 601 * as invalid. 602 */ 603 xpt_print_path(periph->path); 604 printf("Invalidating device\n"); 605 softc->flags |= PT_FLAG_DEVICE_INVALID; 606 } 607 608 /* 609 * return all queued I/O with EIO, so that 610 * the client can retry these I/Os in the 611 * proper order should it attempt to recover. 612 */ 613 while ((q_bp = bufq_first(&softc->buf_queue)) 614 != NULL) { 615 bufq_remove(&softc->buf_queue, q_bp); 616 q_bp->b_resid = q_bp->b_bcount; 617 q_bp->b_error = EIO; 618 q_bp->b_flags |= B_ERROR; 619 biodone(q_bp); 620 } 621 crit_exit(); 622 bp->b_error = error; 623 bp->b_resid = bp->b_bcount; 624 bp->b_flags |= B_ERROR; 625 } else { 626 bp->b_resid = csio->resid; 627 bp->b_error = 0; 628 if (bp->b_resid != 0) { 629 /* Short transfer ??? */ 630 bp->b_flags |= B_ERROR; 631 } 632 } 633 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 634 cam_release_devq(done_ccb->ccb_h.path, 635 /*relsim_flags*/0, 636 /*reduction*/0, 637 /*timeout*/0, 638 /*getcount_only*/0); 639 } else { 640 bp->b_resid = csio->resid; 641 if (bp->b_resid != 0) 642 bp->b_flags |= B_ERROR; 643 } 644 645 /* 646 * Block out any asyncronous callbacks 647 * while we touch the pending ccb list. 648 */ 649 crit_enter(); 650 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le); 651 crit_exit(); 652 653 devstat_end_transaction_buf(&softc->device_stats, bp); 654 biodone(bp); 655 break; 656 } 657 case PT_CCB_WAITING: 658 /* Caller will release the CCB */ 659 wakeup(&done_ccb->ccb_h.cbfcnp); 660 return; 661 } 662 xpt_release_ccb(done_ccb); 663 } 664 665 static int 666 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 667 { 668 struct pt_softc *softc; 669 struct cam_periph *periph; 670 671 periph = xpt_path_periph(ccb->ccb_h.path); 672 softc = (struct pt_softc *)periph->softc; 673 674 return(cam_periph_error(ccb, cam_flags, sense_flags, 675 &softc->saved_ccb)); 676 } 677 678 static int 679 ptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 680 { 681 struct cam_periph *periph; 682 struct pt_softc *softc; 683 int unit; 684 int error; 685 686 unit = minor(dev); 687 periph = cam_extend_get(ptperiphs, unit); 688 689 if (periph == NULL) 690 return(ENXIO); 691 692 softc = (struct pt_softc *)periph->softc; 693 694 if ((error = cam_periph_lock(periph, PCATCH)) != 0) { 695 return (error); /* error code from tsleep */ 696 } 697 698 switch(cmd) { 699 case PTIOCGETTIMEOUT: 700 if (softc->io_timeout >= 1000) 701 *(int *)addr = softc->io_timeout / 1000; 702 else 703 *(int *)addr = 0; 704 break; 705 case PTIOCSETTIMEOUT: 706 { 707 if (*(int *)addr < 1) { 708 error = EINVAL; 709 break; 710 } 711 712 crit_enter(); 713 softc->io_timeout = *(int *)addr * 1000; 714 crit_exit(); 715 716 break; 717 } 718 default: 719 error = cam_periph_ioctl(periph, cmd, addr, pterror); 720 break; 721 } 722 723 cam_periph_unlock(periph); 724 725 return(error); 726 } 727 728 void 729 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, 730 void (*cbfcnp)(struct cam_periph *, union ccb *), 731 u_int tag_action, int readop, u_int byte2, 732 u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len, 733 u_int32_t timeout) 734 { 735 struct scsi_send_receive *scsi_cmd; 736 737 scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes; 738 scsi_cmd->opcode = readop ? RECEIVE : SEND; 739 scsi_cmd->byte2 = byte2; 740 scsi_ulto3b(xfer_len, scsi_cmd->xfer_len); 741 scsi_cmd->control = 0; 742 743 cam_fill_csio(csio, 744 retries, 745 cbfcnp, 746 /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT, 747 tag_action, 748 data_ptr, 749 xfer_len, 750 sense_len, 751 sizeof(*scsi_cmd), 752 timeout); 753 } 754