sys/bus/cam/scsi/scsi_pt.c

   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 1.23 2008/05/18 20:30:20 pavalos 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_bio         ppriv_ptr1
  80
  81 struct pt_softc {
  82         struct   bio_queue_head bio_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         cdev_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 PERIPHDRIVER_DECLARE(pt, ptdriver);
 121
 122 #define PT_CDEV_MAJOR 61
 123
 124 static struct dev_ops pt_ops = {
 125         { "pt", PT_CDEV_MAJOR, 0 },
 126         .d_open =       ptopen,
 127         .d_close =      ptclose,
 128         .d_read =       physread,
 129         .d_write =      physwrite,
 130         .d_ioctl =      ptioctl,
 131         .d_strategy =   ptstrategy,
 132 };
 133
 134 static struct extend_array *ptperiphs;
 135
 136 #ifndef SCSI_PT_DEFAULT_TIMEOUT
 137 #define SCSI_PT_DEFAULT_TIMEOUT         60
 138 #endif
 139
 140 static int
 141 ptopen(struct dev_open_args *ap)
 142 {
 143         cdev_t dev = ap->a_head.a_dev;
 144         struct cam_periph *periph;
 145         struct pt_softc *softc;
 146         int unit;
 147         int error = 0;
 148
 149         unit = minor(dev);
 150         periph = cam_extend_get(ptperiphs, unit);
 151         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 152                 return (ENXIO);
 153
 154         softc = (struct pt_softc *)periph->softc;
 155
 156         cam_periph_lock(periph);
 157         if (softc->flags & PT_FLAG_DEVICE_INVALID) {
 158                 cam_periph_unlock(periph);
 159                 cam_periph_release(periph);
 160                 return(ENXIO);
 161         }
 162
 163         if ((softc->flags & PT_FLAG_OPEN) == 0)
 164                 softc->flags |= PT_FLAG_OPEN;
 165         else {
 166                 error = EBUSY;
 167                 cam_periph_release(periph);
 168         }
 169
 170         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 171             ("ptopen: dev=%s\n", devtoname(dev)));
 172
 173         cam_periph_unlock(periph);
 174         return (error);
 175 }
 176
 177 static int
 178 ptclose(struct dev_close_args *ap)
 179 {
 180         cdev_t dev = ap->a_head.a_dev;
 181         struct  cam_periph *periph;
 182         struct  pt_softc *softc;
 183         int     unit;
 184
 185         unit = minor(dev);
 186         periph = cam_extend_get(ptperiphs, unit);
 187         if (periph == NULL)
 188                 return (ENXIO);
 189
 190         softc = (struct pt_softc *)periph->softc;
 191
 192         cam_periph_lock(periph);
 193
 194         softc->flags &= ~PT_FLAG_OPEN;
 195         cam_periph_unlock(periph);
 196         cam_periph_release(periph);
 197         return (0);
 198 }
 199
 200 /*
 201  * Actually translate the requested transfer into one the physical driver
 202  * can understand.  The transfer is described by a buf and will include
 203  * only one physical transfer.
 204  */
 205 static int
 206 ptstrategy(struct dev_strategy_args *ap)
 207 {
 208         cdev_t dev = ap->a_head.a_dev;
 209         struct bio *bio = ap->a_bio;
 210         struct buf *bp = bio->bio_buf;
 211         struct cam_periph *periph;
 212         struct pt_softc *softc;
 213         u_int  unit;
 214
 215         unit = minor(dev);
 216         periph = cam_extend_get(ptperiphs, unit);
 217         if (periph == NULL) {
 218                 bp->b_error = ENXIO;
 219                 goto bad;
 220         }
 221         cam_periph_lock(periph);
 222         softc = (struct pt_softc *)periph->softc;
 223
 224         /*
 225          * If the device has been made invalid, error out
 226          */
 227         if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
 228                 cam_periph_unlock(periph);
 229                 bp->b_error = ENXIO;
 230                 goto bad;
 231         }
 232
 233         /*
 234          * Place it in the queue of disk activities for this disk
 235          */
 236         bioq_insert_tail(&softc->bio_queue, bio);
 237
 238         /*
 239          * Schedule ourselves for performing the work.
 240          */
 241         xpt_schedule(periph, /* XXX priority */1);
 242         cam_periph_unlock(periph);
 243
 244         return(0);
 245 bad:
 246         bp->b_flags |= B_ERROR;
 247
 248         /*
 249          * Correctly set the buf to indicate a completed xfer
 250          */
 251         bp->b_resid = bp->b_bcount;
 252         biodone(bio);
 253         return(0);
 254 }
 255
 256 static void
 257 ptinit(void)
 258 {
 259         cam_status status;
 260
 261         /*
 262          * Create our extend array for storing the devices we attach to.
 263          */
 264         ptperiphs = cam_extend_new();
 265         if (ptperiphs == NULL) {
 266                 kprintf("pt: Failed to alloc extend array!\n");
 267                 return;
 268         }
 269
 270         /*
 271          * Install a global async callback.  This callback will
 272          * receive async callbacks like "new device found".
 273          */
 274         status = xpt_register_async(AC_FOUND_DEVICE, ptasync, NULL, NULL);
 275
 276         if (status != CAM_REQ_CMP) {
 277                 kprintf("pt: Failed to attach master async callback "
 278                        "due to status 0x%x!\n", status);
 279         }
 280 }
 281
 282 static cam_status
 283 ptctor(struct cam_periph *periph, void *arg)
 284 {
 285         struct pt_softc *softc;
 286         struct ccb_getdev *cgd;
 287
 288         cgd = (struct ccb_getdev *)arg;
 289         if (periph == NULL) {
 290                 kprintf("ptregister: periph was NULL!!\n");
 291                 return(CAM_REQ_CMP_ERR);
 292         }
 293
 294         if (cgd == NULL) {
 295                 kprintf("ptregister: no getdev CCB, can't register device\n");
 296                 return(CAM_REQ_CMP_ERR);
 297         }
 298
 299         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
 300         LIST_INIT(&softc->pending_ccbs);
 301         softc->state = PT_STATE_NORMAL;
 302         bioq_init(&softc->bio_queue);
 303
 304         softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
 305
 306         periph->softc = softc;
 307
 308         cam_periph_unlock(periph);
 309         cam_extend_set(ptperiphs, periph->unit_number, periph);
 310
 311         devstat_add_entry(&softc->device_stats, "pt",
 312                           periph->unit_number, 0,
 313                           DEVSTAT_NO_BLOCKSIZE,
 314                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
 315                           DEVSTAT_PRIORITY_OTHER);
 316
 317         dev_ops_add(&pt_ops, -1, periph->unit_number);
 318         make_dev(&pt_ops, periph->unit_number, UID_ROOT,
 319                   GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 320                   periph->unit_number);
 321         cam_periph_lock(periph);
 322         /*
 323          * Add async callbacks for bus reset and
 324          * bus device reset calls.  I don't bother
 325          * checking if this fails as, in most cases,
 326          * the system will function just fine without
 327          * them and the only alternative would be to
 328          * not attach the device on failure.
 329          */
 330         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
 331                            ptasync, periph, periph->path);
 332
 333         /* Tell the user we've attached to the device */
 334         xpt_announce_periph(periph, NULL);
 335
 336         return(CAM_REQ_CMP);
 337 }
 338
 339 static void
 340 ptoninvalidate(struct cam_periph *periph)
 341 {
 342         struct pt_softc *softc;
 343         struct bio *q_bio;
 344         struct buf *q_bp;
 345
 346         softc = (struct pt_softc *)periph->softc;
 347
 348         /*
 349          * De-register any async callbacks.
 350          */
 351         xpt_register_async(0, ptasync, periph, periph->path);
 352
 353         softc->flags |= PT_FLAG_DEVICE_INVALID;
 354
 355         /*
 356          * Return all queued I/O with ENXIO.
 357          * XXX Handle any transactions queued to the card
 358          *     with XPT_ABORT_CCB.
 359          */
 360         while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){
 361                 bioq_remove(&softc->bio_queue, q_bio);
 362                 q_bp = q_bio->bio_buf;
 363                 q_bp->b_resid = q_bp->b_bcount;
 364                 q_bp->b_error = ENXIO;
 365                 q_bp->b_flags |= B_ERROR;
 366                 biodone(q_bio);
 367         }
 368
 369         xpt_print(periph->path, "lost device\n");
 370 }
 371
 372 static void
 373 ptdtor(struct cam_periph *periph)
 374 {
 375         struct pt_softc *softc;
 376
 377         softc = (struct pt_softc *)periph->softc;
 378
 379         devstat_remove_entry(&softc->device_stats);
 380
 381         cam_extend_release(ptperiphs, periph->unit_number);
 382         xpt_print(periph->path, "removing device entry\n");
 383         dev_ops_remove(&pt_ops, -1, periph->unit_number);
 384         kfree(softc, M_DEVBUF);
 385 }
 386
 387 static void
 388 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 389 {
 390         struct cam_periph *periph;
 391
 392         periph = (struct cam_periph *)callback_arg;
 393         switch (code) {
 394         case AC_FOUND_DEVICE:
 395         {
 396                 struct ccb_getdev *cgd;
 397                 cam_status status;
 398
 399                 cgd = (struct ccb_getdev *)arg;
 400                 if (cgd == NULL)
 401                         break;
 402
 403                 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR)
 404                         break;
 405
 406                 /*
 407                  * Allocate a peripheral instance for
 408                  * this device and start the probe
 409                  * process.
 410                  */
 411                 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor,
 412                                           ptstart, "pt", CAM_PERIPH_BIO,
 413                                           cgd->ccb_h.path, ptasync,
 414                                           AC_FOUND_DEVICE, cgd);
 415
 416                 if (status != CAM_REQ_CMP
 417                  && status != CAM_REQ_INPROG)
 418                         kprintf("ptasync: Unable to attach to new device "
 419                                 "due to status 0x%x\n", status);
 420                 break;
 421         }
 422         case AC_SENT_BDR:
 423         case AC_BUS_RESET:
 424         {
 425                 struct pt_softc *softc;
 426                 struct ccb_hdr *ccbh;
 427
 428                 softc = (struct pt_softc *)periph->softc;
 429                 /*
 430                  * Don't fail on the expected unit attention
 431                  * that will occur.
 432                  */
 433                 softc->flags |= PT_FLAG_RETRY_UA;
 434                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
 435                         ccbh->ccb_state |= PT_CCB_RETRY_UA;
 436                 /* FALLTHROUGH */
 437         }
 438         default:
 439                 cam_periph_async(periph, code, path, arg);
 440                 break;
 441         }
 442 }
 443
 444 static void
 445 ptstart(struct cam_periph *periph, union ccb *start_ccb)
 446 {
 447         struct pt_softc *softc;
 448         struct buf *bp;
 449         struct bio *bio;
 450
 451         softc = (struct pt_softc *)periph->softc;
 452
 453         /*
 454          * See if there is a buf with work for us to do..
 455          */
 456         bio = bioq_first(&softc->bio_queue);
 457         if (periph->immediate_priority <= periph->pinfo.priority) {
 458                 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
 459                                 ("queuing for immediate ccb\n"));
 460                 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
 461                 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 462                                   periph_links.sle);
 463                 periph->immediate_priority = CAM_PRIORITY_NONE;
 464                 wakeup(&periph->ccb_list);
 465         } else if (bio == NULL) {
 466                 xpt_release_ccb(start_ccb);
 467         } else {
 468                 bioq_remove(&softc->bio_queue, bio);
 469                 bp = bio->bio_buf;
 470
 471                 devstat_start_transaction(&softc->device_stats);
 472
 473                 scsi_send_receive(&start_ccb->csio,
 474                                   /*retries*/4,
 475                                   ptdone,
 476                                   MSG_SIMPLE_Q_TAG,
 477                                   (bp->b_cmd == BUF_CMD_READ),
 478                                   /*byte2*/0,
 479                                   bp->b_bcount,
 480                                   bp->b_data,
 481                                   /*sense_len*/SSD_FULL_SIZE,
 482                                   /*timeout*/softc->io_timeout);
 483
 484                 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO_UA;
 485
 486                 /*
 487                  * Block out any asyncronous callbacks
 488                  * while we touch the pending ccb list.
 489                  */
 490                 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
 491                                  periph_links.le);
 492
 493                 start_ccb->ccb_h.ccb_bio = bio;
 494                 bio = bioq_first(&softc->bio_queue);
 495
 496                 xpt_action(start_ccb);
 497
 498                 if (bio != NULL) {
 499                         /* Have more work to do, so ensure we stay scheduled */
 500                         xpt_schedule(periph, /* XXX priority */1);
 501                 }
 502         }
 503 }
 504
 505 static void
 506 ptdone(struct cam_periph *periph, union ccb *done_ccb)
 507 {
 508         struct pt_softc *softc;
 509         struct ccb_scsiio *csio;
 510
 511         softc = (struct pt_softc *)periph->softc;
 512         csio = &done_ccb->csio;
 513         switch (csio->ccb_h.ccb_state) {
 514         case PT_CCB_BUFFER_IO:
 515         case PT_CCB_BUFFER_IO_UA:
 516         {
 517                 struct buf *bp;
 518                 struct bio *bio;
 519
 520                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
 521                 bp = bio->bio_buf;
 522
 523                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 524                         int error;
 525                         int sf;
 526
 527                         if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
 528                                 sf = SF_RETRY_UA;
 529                         else
 530                                 sf = 0;
 531
 532                         error = pterror(done_ccb, CAM_RETRY_SELTO, sf);
 533                         if (error == ERESTART) {
 534                                 /*
 535                                  * A retry was scheuled, so
 536                                  * just return.
 537                                  */
 538                                 return;
 539                         }
 540                         if (error != 0) {
 541                                 struct buf *q_bp;
 542                                 struct bio *q_bio;
 543
 544                                 if (error == ENXIO) {
 545                                         /*
 546                                          * Catastrophic error.  Mark our device
 547                                          * as invalid.
 548                                          */
 549                                         xpt_print(periph->path,
 550                                             "Invalidating device\n");
 551                                         softc->flags |= PT_FLAG_DEVICE_INVALID;
 552                                 }
 553
 554                                 /*
 555                                  * return all queued I/O with EIO, so that
 556                                  * the client can retry these I/Os in the
 557                                  * proper order should it attempt to recover.
 558                                  */
 559                                 while ((q_bio = bioq_first(&softc->bio_queue))
 560                                         != NULL) {
 561                                         bioq_remove(&softc->bio_queue, q_bio);
 562                                         q_bp = q_bio->bio_buf;
 563                                         q_bp->b_resid = q_bp->b_bcount;
 564                                         q_bp->b_error = EIO;
 565                                         q_bp->b_flags |= B_ERROR;
 566                                         biodone(q_bio);
 567                                 }
 568                                 bp->b_error = error;
 569                                 bp->b_resid = bp->b_bcount;
 570                                 bp->b_flags |= B_ERROR;
 571                         } else {
 572                                 bp->b_resid = csio->resid;
 573                                 bp->b_error = 0;
 574                                 if (bp->b_resid != 0) {
 575                                         /* Short transfer ??? */
 576                                         bp->b_flags |= B_ERROR;
 577                                 }
 578                         }
 579                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 580                                 cam_release_devq(done_ccb->ccb_h.path,
 581                                                  /*relsim_flags*/0,
 582                                                  /*reduction*/0,
 583                                                  /*timeout*/0,
 584                                                  /*getcount_only*/0);
 585                 } else {
 586                         bp->b_resid = csio->resid;
 587                         if (bp->b_resid != 0)
 588                                 bp->b_flags |= B_ERROR;
 589                 }
 590
 591                 /*
 592                  * Block out any asyncronous callbacks
 593                  * while we touch the pending ccb list.
 594                  */
 595                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
 596
 597                 devstat_end_transaction_buf(&softc->device_stats, bp);
 598                 biodone(bio);
 599                 break;
 600         }
 601         case PT_CCB_WAITING:
 602                 /* Caller will release the CCB */
 603                 wakeup(&done_ccb->ccb_h.cbfcnp);
 604                 return;
 605         }
 606         xpt_release_ccb(done_ccb);
 607 }
 608
 609 static int
 610 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 611 {
 612         struct pt_softc   *softc;
 613         struct cam_periph *periph;
 614
 615         periph = xpt_path_periph(ccb->ccb_h.path);
 616         softc = (struct pt_softc *)periph->softc;
 617
 618         return(cam_periph_error(ccb, cam_flags, sense_flags,
 619                                 &softc->saved_ccb));
 620 }
 621
 622 static int
 623 ptioctl(struct dev_ioctl_args *ap)
 624 {
 625         cdev_t dev = ap->a_head.a_dev;
 626         caddr_t addr = ap->a_data;
 627         struct cam_periph *periph;
 628         struct pt_softc *softc;
 629         int unit;
 630         int error = 0;
 631
 632         unit = minor(dev);
 633         periph = cam_extend_get(ptperiphs, unit);
 634
 635         if (periph == NULL)
 636                 return(ENXIO);
 637
 638         softc = (struct pt_softc *)periph->softc;
 639
 640         cam_periph_lock(periph);
 641
 642         switch(ap->a_cmd) {
 643         case PTIOCGETTIMEOUT:
 644                 if (softc->io_timeout >= 1000)
 645                         *(int *)addr = softc->io_timeout / 1000;
 646                 else
 647                         *(int *)addr = 0;
 648                 break;
 649         case PTIOCSETTIMEOUT:
 650                 if (*(int *)addr < 1) {
 651                         error = EINVAL;
 652                         break;
 653                 }
 654
 655                 softc->io_timeout = *(int *)addr * 1000;
 656
 657                 break;
 658         default:
 659                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, pterror);
 660                 break;
 661         }
 662
 663         cam_periph_unlock(periph);
 664
 665         return(error);
 666 }
 667
 668 void
 669 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
 670                   void (*cbfcnp)(struct cam_periph *, union ccb *),
 671                   u_int tag_action, int readop, u_int byte2,
 672                   u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len,
 673                   u_int32_t timeout)
 674 {
 675         struct scsi_send_receive *scsi_cmd;
 676
 677         scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes;
 678         scsi_cmd->opcode = readop ? RECEIVE : SEND;
 679         scsi_cmd->byte2 = byte2;
 680         scsi_ulto3b(xfer_len, scsi_cmd->xfer_len);
 681         scsi_cmd->control = 0;
 682
 683         cam_fill_csio(csio,
 684                       retries,
 685                       cbfcnp,
 686                       /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
 687                       tag_action,
 688                       data_ptr,
 689                       xfer_len,
 690                       sense_len,
 691                       sizeof(*scsi_cmd),
 692                       timeout);
 693 }