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  */
  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 #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   buf_queue_head buf_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 DATA_SET(periphdriver_set, 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         /* bmaj */      -1
 136 };
 137
 138 static struct extend_array *ptperiphs;
 139
 140 #ifndef SCSI_PT_DEFAULT_TIMEOUT
 141 #define SCSI_PT_DEFAULT_TIMEOUT         60
 142 #endif
 143
 144 static int
 145 ptopen(dev_t dev, int flags, int fmt, struct proc *p)
 146 {
 147         struct cam_periph *periph;
 148         struct pt_softc *softc;
 149         int unit;
 150         int error;
 151         int s;
 152
 153         unit = minor(dev);
 154         periph = cam_extend_get(ptperiphs, unit);
 155         if (periph == NULL)
 156                 return (ENXIO);
 157
 158         softc = (struct pt_softc *)periph->softc;
 159
 160         s = splsoftcam();
 161         if (softc->flags & PT_FLAG_DEVICE_INVALID) {
 162                 splx(s);
 163                 return(ENXIO);
 164         }
 165
 166         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 167             ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit));
 168
 169         if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
 170                 splx(s);
 171                 return (error); /* error code from tsleep */
 172         }
 173
 174         splx(s);
 175
 176         if ((softc->flags & PT_FLAG_OPEN) == 0) {
 177                 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 178                         error = ENXIO;
 179                 else
 180                         softc->flags |= PT_FLAG_OPEN;
 181         } else
 182                 error = EBUSY;
 183
 184         cam_periph_unlock(periph);
 185         return (error);
 186 }
 187
 188 static int
 189 ptclose(dev_t dev, int flag, int fmt, struct proc *p)
 190 {
 191         struct  cam_periph *periph;
 192         struct  pt_softc *softc;
 193         int     unit;
 194         int     error;
 195
 196         unit = minor(dev);
 197         periph = cam_extend_get(ptperiphs, unit);
 198         if (periph == NULL)
 199                 return (ENXIO);
 200
 201         softc = (struct pt_softc *)periph->softc;
 202
 203         if ((error = cam_periph_lock(periph, PRIBIO)) != 0)
 204                 return (error); /* error code from tsleep */
 205
 206         softc->flags &= ~PT_FLAG_OPEN;
 207         cam_periph_unlock(periph);
 208         cam_periph_release(periph);
 209         return (0);
 210 }
 211
 212 /*
 213  * Actually translate the requested transfer into one the physical driver
 214  * can understand.  The transfer is described by a buf and will include
 215  * only one physical transfer.
 216  */
 217 static void
 218 ptstrategy(struct buf *bp)
 219 {
 220         struct cam_periph *periph;
 221         struct pt_softc *softc;
 222         u_int  unit;
 223         int    s;
 224
 225         unit = minor(bp->b_dev);
 226         periph = cam_extend_get(ptperiphs, unit);
 227         if (periph == NULL) {
 228                 bp->b_error = ENXIO;
 229                 goto bad;
 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                 bp->b_error = ENXIO;
 246                 goto bad;
 247         }
 248
 249         /*
 250          * Place it in the queue of disk activities for this disk
 251          */
 252         bufq_insert_tail(&softc->buf_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 bad:
 263         bp->b_flags |= B_ERROR;
 264
 265         /*
 266          * Correctly set the buf to indicate a completed xfer
 267          */
 268         bp->b_resid = bp->b_bcount;
 269         biodone(bp);
 270 }
 271
 272 static void
 273 ptinit(void)
 274 {
 275         cam_status status;
 276         struct cam_path *path;
 277
 278         /*
 279          * Create our extend array for storing the devices we attach to.
 280          */
 281         ptperiphs = cam_extend_new();
 282         if (ptperiphs == NULL) {
 283                 printf("pt: Failed to alloc extend array!\n");
 284                 return;
 285         }
 286
 287         /*
 288          * Install a global async callback.  This callback will
 289          * receive async callbacks like "new device found".
 290          */
 291         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
 292                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
 293
 294         if (status == CAM_REQ_CMP) {
 295                 struct ccb_setasync csa;
 296
 297                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
 298                 csa.ccb_h.func_code = XPT_SASYNC_CB;
 299                 csa.event_enable = AC_FOUND_DEVICE;
 300                 csa.callback = ptasync;
 301                 csa.callback_arg = NULL;
 302                 xpt_action((union ccb *)&csa);
 303                 status = csa.ccb_h.status;
 304                 xpt_free_path(path);
 305         }
 306
 307         if (status != CAM_REQ_CMP) {
 308                 printf("pt: Failed to attach master async callback "
 309                        "due to status 0x%x!\n", status);
 310         }
 311 }
 312
 313 static cam_status
 314 ptctor(struct cam_periph *periph, void *arg)
 315 {
 316         struct pt_softc *softc;
 317         struct ccb_setasync csa;
 318         struct ccb_getdev *cgd;
 319
 320         cgd = (struct ccb_getdev *)arg;
 321         if (periph == NULL) {
 322                 printf("ptregister: periph was NULL!!\n");
 323                 return(CAM_REQ_CMP_ERR);
 324         }
 325
 326         if (cgd == NULL) {
 327                 printf("ptregister: no getdev CCB, can't register device\n");
 328                 return(CAM_REQ_CMP_ERR);
 329         }
 330
 331         softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 332
 333         if (softc == NULL) {
 334                 printf("daregister: Unable to probe new device. "
 335                        "Unable to allocate softc\n");
 336                 return(CAM_REQ_CMP_ERR);
 337         }
 338
 339         bzero(softc, sizeof(*softc));
 340         LIST_INIT(&softc->pending_ccbs);
 341         softc->state = PT_STATE_NORMAL;
 342         bufq_init(&softc->buf_queue);
 343
 344         softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
 345
 346         periph->softc = softc;
 347
 348         cam_extend_set(ptperiphs, periph->unit_number, periph);
 349
 350         devstat_add_entry(&softc->device_stats, "pt",
 351                           periph->unit_number, 0,
 352                           DEVSTAT_NO_BLOCKSIZE,
 353                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
 354                           DEVSTAT_PRIORITY_OTHER);
 355
 356         softc->dev = make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT,
 357                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 358                               periph->unit_number);
 359         /*
 360          * Add async callbacks for bus reset and
 361          * bus device reset calls.  I don't bother
 362          * checking if this fails as, in most cases,
 363          * the system will function just fine without
 364          * them and the only alternative would be to
 365          * not attach the device on failure.
 366          */
 367         xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
 368         csa.ccb_h.func_code = XPT_SASYNC_CB;
 369         csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
 370         csa.callback = ptasync;
 371         csa.callback_arg = periph;
 372         xpt_action((union ccb *)&csa);
 373
 374         /* Tell the user we've attached to the device */
 375         xpt_announce_periph(periph, NULL);
 376
 377         return(CAM_REQ_CMP);
 378 }
 379
 380 static void
 381 ptoninvalidate(struct cam_periph *periph)
 382 {
 383         int s;
 384         struct pt_softc *softc;
 385         struct buf *q_bp;
 386         struct ccb_setasync csa;
 387
 388         softc = (struct pt_softc *)periph->softc;
 389
 390         /*
 391          * De-register any async callbacks.
 392          */
 393         xpt_setup_ccb(&csa.ccb_h, periph->path,
 394                       /* priority */ 5);
 395         csa.ccb_h.func_code = XPT_SASYNC_CB;
 396         csa.event_enable = 0;
 397         csa.callback = ptasync;
 398         csa.callback_arg = periph;
 399         xpt_action((union ccb *)&csa);
 400
 401         softc->flags |= PT_FLAG_DEVICE_INVALID;
 402
 403         /*
 404          * Although the oninvalidate() routines are always called at
 405          * splsoftcam, we need to be at splbio() here to keep the buffer
 406          * queue from being modified while we traverse it.
 407          */
 408         s = splbio();
 409
 410         /*
 411          * Return all queued I/O with ENXIO.
 412          * XXX Handle any transactions queued to the card
 413          *     with XPT_ABORT_CCB.
 414          */
 415         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
 416                 bufq_remove(&softc->buf_queue, q_bp);
 417                 q_bp->b_resid = q_bp->b_bcount;
 418                 q_bp->b_error = ENXIO;
 419                 q_bp->b_flags |= B_ERROR;
 420                 biodone(q_bp);
 421         }
 422
 423         splx(s);
 424
 425         xpt_print_path(periph->path);
 426         printf("lost device\n");
 427 }
 428
 429 static void
 430 ptdtor(struct cam_periph *periph)
 431 {
 432         struct pt_softc *softc;
 433
 434         softc = (struct pt_softc *)periph->softc;
 435
 436         devstat_remove_entry(&softc->device_stats);
 437
 438         destroy_dev(softc->dev);
 439
 440         cam_extend_release(ptperiphs, periph->unit_number);
 441         xpt_print_path(periph->path);
 442         printf("removing device entry\n");
 443         free(softc, M_DEVBUF);
 444 }
 445
 446 static void
 447 ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 448 {
 449         struct cam_periph *periph;
 450
 451         periph = (struct cam_periph *)callback_arg;
 452         switch (code) {
 453         case AC_FOUND_DEVICE:
 454         {
 455                 struct ccb_getdev *cgd;
 456                 cam_status status;
 457
 458                 cgd = (struct ccb_getdev *)arg;
 459
 460                 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR)
 461                         break;
 462
 463                 /*
 464                  * Allocate a peripheral instance for
 465                  * this device and start the probe
 466                  * process.
 467                  */
 468                 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor,
 469                                           ptstart, "pt", CAM_PERIPH_BIO,
 470                                           cgd->ccb_h.path, ptasync,
 471                                           AC_FOUND_DEVICE, cgd);
 472
 473                 if (status != CAM_REQ_CMP
 474                  && status != CAM_REQ_INPROG)
 475                         printf("ptasync: Unable to attach to new device "
 476                                 "due to status 0x%x\n", status);
 477                 break;
 478         }
 479         case AC_SENT_BDR:
 480         case AC_BUS_RESET:
 481         {
 482                 struct pt_softc *softc;
 483                 struct ccb_hdr *ccbh;
 484                 int s;
 485
 486                 softc = (struct pt_softc *)periph->softc;
 487                 s = splsoftcam();
 488                 /*
 489                  * Don't fail on the expected unit attention
 490                  * that will occur.
 491                  */
 492                 softc->flags |= PT_FLAG_RETRY_UA;
 493                 for (ccbh = LIST_FIRST(&softc->pending_ccbs);
 494                      ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le))
 495                         ccbh->ccb_state |= PT_CCB_RETRY_UA;
 496                 splx(s);
 497                 /* FALLTHROUGH */
 498         }
 499         default:
 500                 cam_periph_async(periph, code, path, arg);
 501                 break;
 502         }
 503 }
 504
 505 static void
 506 ptstart(struct cam_periph *periph, union ccb *start_ccb)
 507 {
 508         struct pt_softc *softc;
 509         struct buf *bp;
 510         int s;
 511
 512         softc = (struct pt_softc *)periph->softc;
 513
 514         /*
 515          * See if there is a buf with work for us to do..
 516          */
 517         s = splbio();
 518         bp = bufq_first(&softc->buf_queue);
 519         if (periph->immediate_priority <= periph->pinfo.priority) {
 520                 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
 521                                 ("queuing for immediate ccb\n"));
 522                 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
 523                 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 524                                   periph_links.sle);
 525                 periph->immediate_priority = CAM_PRIORITY_NONE;
 526                 splx(s);
 527                 wakeup(&periph->ccb_list);
 528         } else if (bp == NULL) {
 529                 splx(s);
 530                 xpt_release_ccb(start_ccb);
 531         } else {
 532                 int oldspl;
 533
 534                 bufq_remove(&softc->buf_queue, bp);
 535
 536                 devstat_start_transaction(&softc->device_stats);
 537
 538                 scsi_send_receive(&start_ccb->csio,
 539                                   /*retries*/4,
 540                                   ptdone,
 541                                   MSG_SIMPLE_Q_TAG,
 542                                   bp->b_flags & B_READ,
 543                                   /*byte2*/0,
 544                                   bp->b_bcount,
 545                                   bp->b_data,
 546                                   /*sense_len*/SSD_FULL_SIZE,
 547                                   /*timeout*/softc->io_timeout);
 548
 549                 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO;
 550
 551                 /*
 552                  * Block out any asyncronous callbacks
 553                  * while we touch the pending ccb list.
 554                  */
 555                 oldspl = splcam();
 556                 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
 557                                  periph_links.le);
 558                 splx(oldspl);
 559
 560                 start_ccb->ccb_h.ccb_bp = bp;
 561                 bp = bufq_first(&softc->buf_queue);
 562                 splx(s);
 563
 564                 xpt_action(start_ccb);
 565
 566                 if (bp != NULL) {
 567                         /* Have more work to do, so ensure we stay scheduled */
 568                         xpt_schedule(periph, /* XXX priority */1);
 569                 }
 570         }
 571 }
 572
 573 static void
 574 ptdone(struct cam_periph *periph, union ccb *done_ccb)
 575 {
 576         struct pt_softc *softc;
 577         struct ccb_scsiio *csio;
 578
 579         softc = (struct pt_softc *)periph->softc;
 580         csio = &done_ccb->csio;
 581         switch (csio->ccb_h.ccb_state) {
 582         case PT_CCB_BUFFER_IO:
 583         case PT_CCB_BUFFER_IO_UA:
 584         {
 585                 struct buf *bp;
 586                 int    oldspl;
 587
 588                 bp = (struct buf *)done_ccb->ccb_h.ccb_bp;
 589                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 590                         int error;
 591                         int s;
 592                         int sf;
 593
 594                         if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
 595                                 sf = SF_RETRY_UA;
 596                         else
 597                                 sf = 0;
 598
 599                         sf |= SF_RETRY_SELTO;
 600
 601                         if ((error = pterror(done_ccb, 0, sf)) == ERESTART) {
 602                                 /*
 603                                  * A retry was scheuled, so
 604                                  * just return.
 605                                  */
 606                                 return;
 607                         }
 608                         if (error != 0) {
 609                                 struct buf *q_bp;
 610
 611                                 s = splbio();
 612
 613                                 if (error == ENXIO) {
 614                                         /*
 615                                          * Catastrophic error.  Mark our device
 616                                          * as invalid.
 617                                          */
 618                                         xpt_print_path(periph->path);
 619                                         printf("Invalidating device\n");
 620                                         softc->flags |= PT_FLAG_DEVICE_INVALID;
 621                                 }
 622
 623                                 /*
 624                                  * return all queued I/O with EIO, so that
 625                                  * the client can retry these I/Os in the
 626                                  * proper order should it attempt to recover.
 627                                  */
 628                                 while ((q_bp = bufq_first(&softc->buf_queue))
 629                                         != NULL) {
 630                                         bufq_remove(&softc->buf_queue, q_bp);
 631                                         q_bp->b_resid = q_bp->b_bcount;
 632                                         q_bp->b_error = EIO;
 633                                         q_bp->b_flags |= B_ERROR;
 634                                         biodone(q_bp);
 635                                 }
 636                                 splx(s);
 637                                 bp->b_error = error;
 638                                 bp->b_resid = bp->b_bcount;
 639                                 bp->b_flags |= B_ERROR;
 640                         } else {
 641                                 bp->b_resid = csio->resid;
 642                                 bp->b_error = 0;
 643                                 if (bp->b_resid != 0) {
 644                                         /* Short transfer ??? */
 645                                         bp->b_flags |= B_ERROR;
 646                                 }
 647                         }
 648                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 649                                 cam_release_devq(done_ccb->ccb_h.path,
 650                                                  /*relsim_flags*/0,
 651                                                  /*reduction*/0,
 652                                                  /*timeout*/0,
 653                                                  /*getcount_only*/0);
 654                 } else {
 655                         bp->b_resid = csio->resid;
 656                         if (bp->b_resid != 0)
 657                                 bp->b_flags |= B_ERROR;
 658                 }
 659
 660                 /*
 661                  * Block out any asyncronous callbacks
 662                  * while we touch the pending ccb list.
 663                  */
 664                 oldspl = splcam();
 665                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
 666                 splx(oldspl);
 667
 668                 devstat_end_transaction_buf(&softc->device_stats, bp);
 669                 biodone(bp);
 670                 break;
 671         }
 672         case PT_CCB_WAITING:
 673                 /* Caller will release the CCB */
 674                 wakeup(&done_ccb->ccb_h.cbfcnp);
 675                 return;
 676         }
 677         xpt_release_ccb(done_ccb);
 678 }
 679
 680 static int
 681 pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 682 {
 683         struct pt_softc   *softc;
 684         struct cam_periph *periph;
 685
 686         periph = xpt_path_periph(ccb->ccb_h.path);
 687         softc = (struct pt_softc *)periph->softc;
 688
 689         return(cam_periph_error(ccb, cam_flags, sense_flags,
 690                                 &softc->saved_ccb));
 691 }
 692
 693 static int
 694 ptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
 695 {
 696         struct cam_periph *periph;
 697         struct pt_softc *softc;
 698         int unit;
 699         int error;
 700
 701         unit = minor(dev);
 702         periph = cam_extend_get(ptperiphs, unit);
 703
 704         if (periph == NULL)
 705                 return(ENXIO);
 706
 707         softc = (struct pt_softc *)periph->softc;
 708
 709         if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
 710                 return (error); /* error code from tsleep */
 711         }
 712
 713         switch(cmd) {
 714         case PTIOCGETTIMEOUT:
 715                 if (softc->io_timeout >= 1000)
 716                         *(int *)addr = softc->io_timeout / 1000;
 717                 else
 718                         *(int *)addr = 0;
 719                 break;
 720         case PTIOCSETTIMEOUT:
 721         {
 722                 int s;
 723
 724                 if (*(int *)addr < 1) {
 725                         error = EINVAL;
 726                         break;
 727                 }
 728
 729                 s = splsoftcam();
 730                 softc->io_timeout = *(int *)addr * 1000;
 731                 splx(s);
 732
 733                 break;
 734         }
 735         default:
 736                 error = cam_periph_ioctl(periph, cmd, addr, pterror);
 737                 break;
 738         }
 739
 740         cam_periph_unlock(periph);
 741
 742         return(error);
 743 }
 744
 745 void
 746 scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
 747                   void (*cbfcnp)(struct cam_periph *, union ccb *),
 748                   u_int tag_action, int readop, u_int byte2,
 749                   u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len,
 750                   u_int32_t timeout)
 751 {
 752         struct scsi_send_receive *scsi_cmd;
 753
 754         scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes;
 755         scsi_cmd->opcode = readop ? RECEIVE : SEND;
 756         scsi_cmd->byte2 = byte2;
 757         scsi_ulto3b(xfer_len, scsi_cmd->xfer_len);
 758         scsi_cmd->control = 0;
 759
 760         cam_fill_csio(csio,
 761                       retries,
 762                       cbfcnp,
 763                       /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
 764                       tag_action,
 765                       data_ptr,
 766                       xfer_len,
 767                       sense_len,
 768                       sizeof(*scsi_cmd),
 769                       timeout);
 770 }