6/sys/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
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  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/bio.h>
  38 #include <sys/devicestat.h>
  39 #include <sys/malloc.h>
  40 #include <sys/conf.h>
  41 #include <sys/ptio.h>
  42
  43 #include <cam/cam.h>
  44 #include <cam/cam_ccb.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         struct cdev *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
 120 static struct cdevsw pt_cdevsw = {
 121         .d_version =    D_VERSION,
 122         .d_flags =      D_NEEDGIANT,
 123         .d_open =       ptopen,
 124         .d_close =      ptclose,
 125         .d_read =       physread,
 126         .d_write =      physwrite,
 127         .d_ioctl =      ptioctl,
 128         .d_strategy =   ptstrategy,
 129         .d_name =       "pt",
 130 };
 131
 132 #ifndef SCSI_PT_DEFAULT_TIMEOUT
 133 #define SCSI_PT_DEFAULT_TIMEOUT         60
 134 #endif
 135
 136 static int
 137 ptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 138 {
 139         struct cam_periph *periph;
 140         struct pt_softc *softc;
 141         int unit;
 142         int error;
 143         int s;
 144
 145         unit = minor(dev);
 146         periph = (struct cam_periph *)dev->si_drv1;
 147         if (periph == NULL)
 148                 return (ENXIO);
 149
 150         softc = (struct pt_softc *)periph->softc;
 151
 152         s = splsoftcam();
 153         if (softc->flags & PT_FLAG_DEVICE_INVALID) {
 154                 splx(s);
 155                 return(ENXIO);
 156         }
 157
 158         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 159             ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit));
 160
 161         if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
 162                 splx(s);
 163                 return (error); /* error code from tsleep */
 164         }
 165
 166         splx(s);
 167
 168         if ((softc->flags & PT_FLAG_OPEN) == 0) {
 169                 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 170                         error = ENXIO;
 171                 else
 172                         softc->flags |= PT_FLAG_OPEN;
 173         } else
 174                 error = EBUSY;
 175
 176         cam_periph_unlock(periph);
 177         return (error);
 178 }
 179
 180 static int
 181 ptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 182 {
 183         struct  cam_periph *periph;
 184         struct  pt_softc *softc;
 185         int     error;
 186
 187         periph = (struct cam_periph *)dev->si_drv1;
 188         if (periph == NULL)
 189                 return (ENXIO);
 190
 191         softc = (struct pt_softc *)periph->softc;
 192
 193         if ((error = cam_periph_lock(periph, PRIBIO)) != 0)
 194                 return (error); /* error code from tsleep */
 195
 196         softc->flags &= ~PT_FLAG_OPEN;
 197         cam_periph_unlock(periph);
 198         cam_periph_release(periph);
 199         return (0);
 200 }
 201
 202 /*
 203  * Actually translate the requested transfer into one the physical driver
 204  * can understand.  The transfer is described by a buf and will include
 205  * only one physical transfer.
 206  */
 207 static void
 208 ptstrategy(struct bio *bp)
 209 {
 210         struct cam_periph *periph;
 211         struct pt_softc *softc;
 212         int    s;
 213
 214         periph = (struct cam_periph *)bp->bio_dev->si_drv1;
 215         bp->bio_resid = bp->bio_bcount;
 216         if (periph == NULL) {
 217                 biofinish(bp, NULL, ENXIO);
 218                 return;
 219         }
 220         softc = (struct pt_softc *)periph->softc;
 221
 222         /*
 223          * Mask interrupts so that the pack cannot be invalidated until
 224          * after we are in the queue.  Otherwise, we might not properly
 225          * clean up one of the buffers.
 226          */
 227         s = splbio();
 228
 229         /*
 230          * If the device has been made invalid, error out
 231          */
 232         if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
 233                 splx(s);
 234                 biofinish(bp, NULL, ENXIO);
 235                 return;
 236         }
 237
 238         /*
 239          * Place it in the queue of disk activities for this disk
 240          */
 241         bioq_insert_tail(&softc->bio_queue, bp);
 242
 243         splx(s);
 244
 245         /*
 246          * Schedule ourselves for performing the work.
 247          */
 248         xpt_schedule(periph, /* XXX priority */1);
 249
 250         return;
 251 }
 252
 253 static void
 254 ptinit(void)
 255 {
 256         cam_status status;
 257         struct cam_path *path;
 258
 259         /*
 260          * Install a global async callback.  This callback will
 261          * receive async callbacks like "new device found".
 262          */
 263         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
 264                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
 265
 266         if (status == CAM_REQ_CMP) {
 267                 struct ccb_setasync csa;
 268
 269                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
 270                 csa.ccb_h.func_code = XPT_SASYNC_CB;
 271                 csa.event_enable = AC_FOUND_DEVICE;
 272                 csa.callback = ptasync;
 273                 csa.callback_arg = NULL;
 274                 xpt_action((union ccb *)&csa);
 275                 status = csa.ccb_h.status;
 276                 xpt_free_path(path);
 277         }
 278
 279         if (status != CAM_REQ_CMP) {
 280                 printf("pt: Failed to attach master async callback "
 281                        "due to status 0x%x!\n", status);
 282         }
 283 }
 284
 285 static cam_status
 286 ptctor(struct cam_periph *periph, void *arg)
 287 {
 288         struct pt_softc *softc;
 289         struct ccb_setasync csa;
 290         struct ccb_getdev *cgd;
 291
 292         cgd = (struct ccb_getdev *)arg;
 293         if (periph == NULL) {
 294                 printf("ptregister: periph was NULL!!\n");
 295                 return(CAM_REQ_CMP_ERR);
 296         }
 297
 298         if (cgd == NULL) {
 299                 printf("ptregister: no getdev CCB, can't register device\n");
 300                 return(CAM_REQ_CMP_ERR);
 301         }
 302
 303         softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 304
 305         if (softc == NULL) {
 306                 printf("daregister: Unable to probe new device. "
 307                        "Unable to allocate softc\n");
 308                 return(CAM_REQ_CMP_ERR);
 309         }
 310
 311         bzero(softc, sizeof(*softc));
 312         LIST_INIT(&softc->pending_ccbs);
 313         softc->state = PT_STATE_NORMAL;
 314         bioq_init(&softc->bio_queue);
 315
 316         softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
 317
 318         periph->softc = softc;
 319
 320         softc->device_stats = devstat_new_entry("pt",
 321                           periph->unit_number, 0,
 322                           DEVSTAT_NO_BLOCKSIZE,
 323                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
 324                           DEVSTAT_PRIORITY_OTHER);
 325
 326         softc->dev = make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT,
 327                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 328                               periph->unit_number);
 329         softc->dev->si_drv1 = periph;
 330
 331         /*
 332          * Add async callbacks for bus reset and
 333          * bus device reset calls.  I don't bother
 334          * checking if this fails as, in most cases,
 335          * the system will function just fine without
 336          * them and the only alternative would be to
 337          * not attach the device on failure.
 338          */
 339         xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
 340         csa.ccb_h.func_code = XPT_SASYNC_CB;
 341         csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
 342         csa.callback = ptasync;
 343         csa.callback_arg = periph;
 344         xpt_action((union ccb *)&csa);
 345
 346         /* Tell the user we've attached to the device */
 347         xpt_announce_periph(periph, NULL);
 348
 349         return(CAM_REQ_CMP);
 350 }
 351
 352 static void
 353 ptoninvalidate(struct cam_periph *periph)
 354 {
 355         int s;
 356         struct pt_softc *softc;
 357         struct ccb_setasync csa;
 358
 359         softc = (struct pt_softc *)periph->softc;
 360
 361         /*
 362          * De-register any async callbacks.
 363          */
 364         xpt_setup_ccb(&csa.ccb_h, periph->path,
 365                       /* priority */ 5);
 366         csa.ccb_h.func_code = XPT_SASYNC_CB;
 367         csa.event_enable = 0;
 368         csa.callback = ptasync;
 369         csa.callback_arg = periph;
 370         xpt_action((union ccb *)&csa);
 371
 372         softc->flags |= PT_FLAG_DEVICE_INVALID;
 373
 374         /*
 375          * Although the oninvalidate() routines are always called at
 376          * splsoftcam, we need to be at splbio() here to keep the buffer
 377          * queue from being modified while we traverse it.
 378          */
 379         s = splbio();
 380
 381         /*
 382          * Return all queued I/O with ENXIO.
 383          * XXX Handle any transactions queued to the card
 384          *     with XPT_ABORT_CCB.
 385          */
 386         bioq_flush(&softc->bio_queue, NULL, ENXIO);
 387
 388         splx(s);
 389
 390         xpt_print_path(periph->path);
 391         printf("lost device\n");
 392 }
 393
 394 static void
 395 ptdtor(struct cam_periph *periph)
 396 {
 397         struct pt_softc *softc;
 398
 399         softc = (struct pt_softc *)periph->softc;
 400
 401         devstat_remove_entry(softc->device_stats);
 402
 403         destroy_dev(softc->dev);
 404
 405         xpt_print_path(periph->path);
 406         printf("removing device entry\n");
 407         free(softc, M_DEVBUF);
 408 }
 409
 410 static void
 411 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 412 {
 413         struct cam_periph *periph;
 414
 415         periph = (struct cam_periph *)callback_arg;
 416         switch (code) {
 417         case AC_FOUND_DEVICE:
 418         {
 419                 struct ccb_getdev *cgd;
 420                 cam_status status;
 421
 422                 cgd = (struct ccb_getdev *)arg;
 423                 if (cgd == NULL)
 424                         break;
 425
 426                 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR)
 427                         break;
 428
 429                 /*
 430                  * Allocate a peripheral instance for
 431                  * this device and start the probe
 432                  * process.
 433                  */
 434                 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor,
 435                                           ptstart, "pt", CAM_PERIPH_BIO,
 436                                           cgd->ccb_h.path, ptasync,
 437                                           AC_FOUND_DEVICE, cgd);
 438
 439                 if (status != CAM_REQ_CMP
 440                  && status != CAM_REQ_INPROG)
 441                         printf("ptasync: Unable to attach to new device "
 442                                 "due to status 0x%x\n", status);
 443                 break;
 444         }
 445         case AC_SENT_BDR:
 446         case AC_BUS_RESET:
 447         {
 448                 struct pt_softc *softc;
 449                 struct ccb_hdr *ccbh;
 450                 int s;
 451
 452                 softc = (struct pt_softc *)periph->softc;
 453                 s = splsoftcam();
 454                 /*
 455                  * Don't fail on the expected unit attention
 456                  * that will occur.
 457                  */
 458                 softc->flags |= PT_FLAG_RETRY_UA;
 459                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
 460                         ccbh->ccb_state |= PT_CCB_RETRY_UA;
 461                 splx(s);
 462         }
 463         /* FALLTHROUGH */
 464         default:
 465                 cam_periph_async(periph, code, path, arg);
 466                 break;
 467         }
 468 }
 469
 470 static void
 471 ptstart(struct cam_periph *periph, union ccb *start_ccb)
 472 {
 473         struct pt_softc *softc;
 474         struct bio *bp;
 475         int s;
 476
 477         softc = (struct pt_softc *)periph->softc;
 478
 479         /*
 480          * See if there is a buf with work for us to do..
 481          */
 482         s = splbio();
 483         bp = bioq_first(&softc->bio_queue);
 484         if (periph->immediate_priority <= periph->pinfo.priority) {
 485                 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
 486                                 ("queuing for immediate ccb\n"));
 487                 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
 488                 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 489                                   periph_links.sle);
 490                 periph->immediate_priority = CAM_PRIORITY_NONE;
 491                 splx(s);
 492                 wakeup(&periph->ccb_list);
 493         } else if (bp == NULL) {
 494                 splx(s);
 495                 xpt_release_ccb(start_ccb);
 496         } else {
 497                 int oldspl;
 498
 499                 bioq_remove(&softc->bio_queue, bp);
 500
 501                 devstat_start_transaction_bio(softc->device_stats, bp);
 502
 503                 scsi_send_receive(&start_ccb->csio,
 504                                   /*retries*/4,
 505                                   ptdone,
 506                                   MSG_SIMPLE_Q_TAG,
 507                                   bp->bio_cmd == BIO_READ,
 508                                   /*byte2*/0,
 509                                   bp->bio_bcount,
 510                                   bp->bio_data,
 511                                   /*sense_len*/SSD_FULL_SIZE,
 512                                   /*timeout*/softc->io_timeout);
 513
 514                 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO_UA;
 515
 516                 /*
 517                  * Block out any asyncronous callbacks
 518                  * while we touch the pending ccb list.
 519                  */
 520                 oldspl = splcam();
 521                 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
 522                                  periph_links.le);
 523                 splx(oldspl);
 524
 525                 start_ccb->ccb_h.ccb_bp = bp;
 526                 bp = bioq_first(&softc->bio_queue);
 527                 splx(s);
 528
 529                 xpt_action(start_ccb);
 530
 531                 if (bp != NULL) {
 532                         /* Have more work to do, so ensure we stay scheduled */
 533                         xpt_schedule(periph, /* XXX priority */1);
 534                 }
 535         }
 536 }
 537
 538 static void
 539 ptdone(struct cam_periph *periph, union ccb *done_ccb)
 540 {
 541         struct pt_softc *softc;
 542         struct ccb_scsiio *csio;
 543
 544         softc = (struct pt_softc *)periph->softc;
 545         csio = &done_ccb->csio;
 546         switch (csio->ccb_h.ccb_state) {
 547         case PT_CCB_BUFFER_IO:
 548         case PT_CCB_BUFFER_IO_UA:
 549         {
 550                 struct bio *bp;
 551                 int    oldspl;
 552
 553                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
 554                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 555                         int error;
 556                         int s;
 557                         int sf;
 558
 559                         if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
 560                                 sf = SF_RETRY_UA;
 561                         else
 562                                 sf = 0;
 563
 564                         error = pterror(done_ccb, CAM_RETRY_SELTO, sf);
 565                         if (error == ERESTART) {
 566                                 /*
 567                                  * A retry was scheuled, so
 568                                  * just return.
 569                                  */
 570                                 return;
 571                         }
 572                         if (error != 0) {
 573                                 s = splbio();
 574
 575                                 if (error == ENXIO) {
 576                                         /*
 577                                          * Catastrophic error.  Mark our device
 578                                          * as invalid.
 579                                          */
 580                                         xpt_print_path(periph->path);
 581                                         printf("Invalidating device\n");
 582                                         softc->flags |= PT_FLAG_DEVICE_INVALID;
 583                                 }
 584
 585                                 /*
 586                                  * return all queued I/O with EIO, so that
 587                                  * the client can retry these I/Os in the
 588                                  * proper order should it attempt to recover.
 589                                  */
 590                                 bioq_flush(&softc->bio_queue, NULL, EIO);
 591                                 splx(s);
 592                                 bp->bio_error = error;
 593                                 bp->bio_resid = bp->bio_bcount;
 594                                 bp->bio_flags |= BIO_ERROR;
 595                         } else {
 596                                 bp->bio_resid = csio->resid;
 597                                 bp->bio_error = 0;
 598                                 if (bp->bio_resid != 0) {
 599                                         /* Short transfer ??? */
 600                                         bp->bio_flags |= BIO_ERROR;
 601                                 }
 602                         }
 603                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 604                                 cam_release_devq(done_ccb->ccb_h.path,
 605                                                  /*relsim_flags*/0,
 606                                                  /*reduction*/0,
 607                                                  /*timeout*/0,
 608                                                  /*getcount_only*/0);
 609                 } else {
 610                         bp->bio_resid = csio->resid;
 611                         if (bp->bio_resid != 0)
 612                                 bp->bio_flags |= BIO_ERROR;
 613                 }
 614
 615                 /*
 616                  * Block out any asyncronous callbacks
 617                  * while we touch the pending ccb list.
 618                  */
 619                 oldspl = splcam();
 620                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
 621                 splx(oldspl);
 622
 623                 biofinish(bp, softc->device_stats, 0);
 624                 break;
 625         }
 626         case PT_CCB_WAITING:
 627                 /* Caller will release the CCB */
 628                 wakeup(&done_ccb->ccb_h.cbfcnp);
 629                 return;
 630         }
 631         xpt_release_ccb(done_ccb);
 632 }
 633
 634 static int
 635 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 636 {
 637         struct pt_softc   *softc;
 638         struct cam_periph *periph;
 639
 640         periph = xpt_path_periph(ccb->ccb_h.path);
 641         softc = (struct pt_softc *)periph->softc;
 642
 643         return(cam_periph_error(ccb, cam_flags, sense_flags,
 644                                 &softc->saved_ccb));
 645 }
 646
 647 static int
 648 ptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 649 {
 650         struct cam_periph *periph;
 651         struct pt_softc *softc;
 652         int error;
 653
 654         periph = (struct cam_periph *)dev->si_drv1;
 655         if (periph == NULL)
 656                 return(ENXIO);
 657
 658         softc = (struct pt_softc *)periph->softc;
 659
 660         if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
 661                 return (error); /* error code from tsleep */
 662         }
 663
 664         switch(cmd) {
 665         case PTIOCGETTIMEOUT:
 666                 if (softc->io_timeout >= 1000)
 667                         *(int *)addr = softc->io_timeout / 1000;
 668                 else
 669                         *(int *)addr = 0;
 670                 break;
 671         case PTIOCSETTIMEOUT:
 672         {
 673                 int s;
 674
 675                 if (*(int *)addr < 1) {
 676                         error = EINVAL;
 677                         break;
 678                 }
 679
 680                 s = splsoftcam();
 681                 softc->io_timeout = *(int *)addr * 1000;
 682                 splx(s);
 683
 684                 break;
 685         }
 686         default:
 687                 error = cam_periph_ioctl(periph, cmd, addr, pterror);
 688                 break;
 689         }
 690
 691         cam_periph_unlock(periph);
 692
 693         return(error);
 694 }
 695
 696 void
 697 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
 698                   void (*cbfcnp)(struct cam_periph *, union ccb *),
 699                   u_int tag_action, int readop, u_int byte2,
 700                   u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len,
 701                   u_int32_t timeout)
 702 {
 703         struct scsi_send_receive *scsi_cmd;
 704
 705         scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes;
 706         scsi_cmd->opcode = readop ? RECEIVE : SEND;
 707         scsi_cmd->byte2 = byte2;
 708         scsi_ulto3b(xfer_len, scsi_cmd->xfer_len);
 709         scsi_cmd->control = 0;
 710
 711         cam_fill_csio(csio,
 712                       retries,
 713                       cbfcnp,
 714                       /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
 715                       tag_action,
 716                       data_ptr,
 717                       xfer_len,
 718                       sense_len,
 719                       sizeof(*scsi_cmd),
 720                       timeout);
 721 }