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 1.12 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 }