sys/dev/disk/nata/ata-queue.c

   1 /*-
   2  * Copyright (c) 1998 - 2006 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/ata/ata-queue.c,v 1.65 2006/07/21 19:13:05 imp Exp $
  27  * $DragonFly: src/sys/dev/disk/nata/ata-queue.c,v 1.5 2007/06/01 00:31:15 dillon Exp $
  28  */
  29
  30 #include "opt_ata.h"
  31
  32 #include <sys/param.h>
  33 #include <sys/bus.h>
  34 #include <sys/callout.h>
  35 #include <sys/nata.h>
  36 #include <sys/queue.h>
  37 #include <sys/spinlock2.h>
  38 #include <sys/systm.h>
  39 #include <sys/taskqueue.h>
  40
  41 #include "ata-all.h"
  42 #include "ata_if.h"
  43
  44 /* prototypes */
  45 static void ata_completed(void *, int);
  46 static void ata_sort_queue(struct ata_channel *ch, struct ata_request *request);
  47 static char *ata_skey2str(u_int8_t);
  48
  49 void
  50 ata_queue_request(struct ata_request *request)
  51 {
  52     struct ata_channel *ch;
  53
  54     /* treat request as virgin (this might be an ATA_R_REQUEUE) */
  55     request->result = request->status = request->error = 0;
  56
  57     /* check that that the device is still valid */
  58     if (!(request->parent = device_get_parent(request->dev))) {
  59         request->result = ENXIO;
  60         if (request->callback)
  61             (request->callback)(request);
  62         return;
  63     }
  64     ch = device_get_softc(request->parent);
  65     callout_init_mp(&request->callout); /* serialization done via state_mtx */
  66     if (!request->callback && !(request->flags & ATA_R_REQUEUE))
  67         spin_init(&request->done);
  68
  69     /* in ATA_STALL_QUEUE state we call HW directly */
  70     if ((ch->state & ATA_STALL_QUEUE) && (request->flags & ATA_R_CONTROL)) {
  71         spin_lock_wr(&ch->state_mtx);
  72         ch->running = request;
  73         if (ch->hw.begin_transaction(request) == ATA_OP_FINISHED) {
  74             ch->running = NULL;
  75             if (!request->callback)
  76                 spin_uninit(&request->done);
  77             spin_unlock_wr(&ch->state_mtx);
  78             return;
  79         }
  80         spin_unlock_wr(&ch->state_mtx);
  81     }
  82     /* otherwise put request on the locked queue at the specified location */
  83     else  {
  84         spin_lock_wr(&ch->queue_mtx);
  85         if (request->flags & ATA_R_AT_HEAD)
  86             TAILQ_INSERT_HEAD(&ch->ata_queue, request, chain);
  87         else if (request->flags & ATA_R_ORDERED)
  88             ata_sort_queue(ch, request);
  89         else
  90             TAILQ_INSERT_TAIL(&ch->ata_queue, request, chain);
  91         spin_unlock_wr(&ch->queue_mtx);
  92         ATA_DEBUG_RQ(request, "queued");
  93         ata_start(ch->dev);
  94     }
  95
  96     /* if this is a requeued request callback/sleep we're done */
  97     if (request->flags & ATA_R_REQUEUE)
  98         return;
  99
 100     /* if this is not a callback wait until request is completed */
 101     if (!request->callback) {
 102         ATA_DEBUG_RQ(request, "wait for completion");
 103         if (!dumping) {
 104             /* interlock against wakeup */
 105             spin_lock_wr(&request->done);
 106             /* check if the request was completed already */
 107             if (!(request->flags & ATA_R_COMPLETED))
 108                 msleep(request, &request->done, 0, "ATA request completion "
 109                        "wait", request->timeout * hz * 4);
 110             spin_unlock_wr(&request->done);
 111             /* check if the request was completed while sleeping */
 112             if (!(request->flags & ATA_R_COMPLETED)) {
 113                 /* apparently not */
 114                 device_printf(request->dev, "WARNING - %s taskqueue timeout - "
 115                               "completing request directly\n",
 116                               ata_cmd2str(request));
 117                 request->flags |= ATA_R_DANGER1;
 118                 ata_completed(request, 0);
 119             }
 120         }
 121         spin_uninit(&request->done);
 122     }
 123 }
 124
 125 int
 126 ata_controlcmd(device_t dev, u_int8_t command, u_int16_t feature,
 127                u_int64_t lba, u_int16_t count)
 128 {
 129     struct ata_request *request = ata_alloc_request();
 130     int error = ENOMEM;
 131
 132     if (request) {
 133         request->dev = dev;
 134         request->u.ata.command = command;
 135         request->u.ata.lba = lba;
 136         request->u.ata.count = count;
 137         request->u.ata.feature = feature;
 138         request->flags = ATA_R_CONTROL;
 139         request->timeout = 1;
 140         request->retries = 0;
 141         ata_queue_request(request);
 142         error = request->result;
 143         ata_free_request(request);
 144     }
 145     return error;
 146 }
 147
 148 int
 149 ata_atapicmd(device_t dev, u_int8_t *ccb, caddr_t data,
 150              int count, int flags, int timeout)
 151 {
 152     struct ata_request *request = ata_alloc_request();
 153     struct ata_device *atadev = device_get_softc(dev);
 154     int error = ENOMEM;
 155
 156     if (request) {
 157         request->dev = dev;
 158         if ((atadev->param.config & ATA_PROTO_MASK) == ATA_PROTO_ATAPI_12)
 159             bcopy(ccb, request->u.atapi.ccb, 12);
 160         else
 161             bcopy(ccb, request->u.atapi.ccb, 16);
 162         request->data = data;
 163         request->bytecount = count;
 164         request->transfersize = min(request->bytecount, 65534);
 165         request->flags = flags | ATA_R_ATAPI;
 166         request->timeout = timeout;
 167         request->retries = 0;
 168         ata_queue_request(request);
 169         error = request->result;
 170         ata_free_request(request);
 171     }
 172     return error;
 173 }
 174
 175 void
 176 ata_start(device_t dev)
 177 {
 178     struct ata_channel *ch = device_get_softc(dev);
 179     struct ata_request *request;
 180     struct ata_composite *cptr;
 181     int dependencies = 0;
 182
 183     /* if we have a request on the queue try to get it running */
 184     spin_lock_wr(&ch->queue_mtx);
 185     if ((request = TAILQ_FIRST(&ch->ata_queue))) {
 186
 187         /* we need the locking function to get the lock for this channel */
 188         if (ATA_LOCKING(dev, ATA_LF_LOCK) == ch->unit) {
 189
 190             /* check for composite dependencies */
 191             if ((cptr = request->composite)) {
 192                 spin_lock_wr(&cptr->lock);
 193                 if ((request->flags & ATA_R_WRITE) &&
 194                     (cptr->wr_depend & cptr->rd_done) != cptr->wr_depend) {
 195                     dependencies = 1;
 196                 }
 197                 spin_unlock_wr(&cptr->lock);
 198             }
 199
 200             /* check we are in the right state and has no dependencies */
 201             spin_lock_wr(&ch->state_mtx);
 202             if (ch->state == ATA_IDLE && !dependencies) {
 203                 ATA_DEBUG_RQ(request, "starting");
 204                 TAILQ_REMOVE(&ch->ata_queue, request, chain);
 205                 ch->running = request;
 206                 ch->state = ATA_ACTIVE;
 207
 208                 /* if we are the freezing point release it */
 209                 if (ch->freezepoint == request)
 210                     ch->freezepoint = NULL;
 211
 212                 if (ch->hw.begin_transaction(request) == ATA_OP_FINISHED) {
 213                     ch->running = NULL;
 214                     ch->state = ATA_IDLE;
 215                     spin_unlock_wr(&ch->state_mtx);
 216                     spin_unlock_wr(&ch->queue_mtx);
 217                     ATA_LOCKING(dev, ATA_LF_UNLOCK);
 218                     ata_finish(request);
 219                     return;
 220                 }
 221                 if (dumping) {
 222                     spin_unlock_wr(&ch->state_mtx);
 223                     spin_unlock_wr(&ch->queue_mtx);
 224                     while (!ata_interrupt(ch))
 225                         DELAY(10);
 226                     return;
 227                 }
 228             }
 229             spin_unlock_wr(&ch->state_mtx);
 230         }
 231     }
 232     spin_unlock_wr(&ch->queue_mtx);
 233 }
 234
 235 void
 236 ata_finish(struct ata_request *request)
 237 {
 238     struct ata_channel *ch = device_get_softc(request->parent);
 239
 240     /*
 241      * if in ATA_STALL_QUEUE state or request has ATA_R_DIRECT flags set
 242      * we need to call ata_complete() directly here (no taskqueue involvement)
 243      */
 244     if (dumping ||
 245         (ch->state & ATA_STALL_QUEUE) || (request->flags & ATA_R_DIRECT)) {
 246         ATA_DEBUG_RQ(request, "finish directly");
 247         ata_completed(request, 0);
 248     }
 249     else {
 250         /* put request on the proper taskqueue for completion */
 251         /* XXX FreeBSD has some sort of bio_taskqueue code here */
 252         TASK_INIT(&request->task, 0, ata_completed, request);
 253         ATA_DEBUG_RQ(request, "finish taskqueue_swi");
 254         taskqueue_enqueue(taskqueue_swi, &request->task);
 255     }
 256 }
 257
 258 static void
 259 ata_completed(void *context, int dummy)
 260 {
 261     struct ata_request *request = (struct ata_request *)context;
 262     struct ata_channel *ch = device_get_softc(request->parent);
 263     struct ata_device *atadev = device_get_softc(request->dev);
 264     struct ata_composite *composite;
 265
 266     if (request->flags & ATA_R_DANGER2) {
 267         device_printf(request->dev,
 268                       "WARNING - %s freeing taskqueue zombie request\n",
 269                       ata_cmd2str(request));
 270         request->flags &= ~(ATA_R_DANGER1 | ATA_R_DANGER2);
 271         ata_free_request(request);
 272         return;
 273     }
 274     if (request->flags & ATA_R_DANGER1)
 275         request->flags |= ATA_R_DANGER2;
 276
 277     ATA_DEBUG_RQ(request, "completed entered");
 278
 279     /* if we had a timeout, reinit channel and deal with the falldown */
 280     if (request->flags & ATA_R_TIMEOUT) {
 281         /*
 282          * if the channel is still present and
 283          * reinit succeeds and
 284          * the device doesn't get detached and
 285          * there are retries left we reinject this request
 286          */
 287         if (ch && !ata_reinit(ch->dev) && !request->result &&
 288             (request->retries-- > 0)) {
 289             if (!(request->flags & ATA_R_QUIET)) {
 290                 device_printf(request->dev,
 291                               "TIMEOUT - %s retrying (%d retr%s left)",
 292                               ata_cmd2str(request), request->retries,
 293                               request->retries == 1 ? "y" : "ies");
 294                 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
 295                     kprintf(" LBA=%ju", request->u.ata.lba);
 296                 kprintf("\n");
 297             }
 298             request->flags &= ~(ATA_R_TIMEOUT | ATA_R_DEBUG);
 299             request->flags |= (ATA_R_AT_HEAD | ATA_R_REQUEUE);
 300             ATA_DEBUG_RQ(request, "completed reinject");
 301             ata_queue_request(request);
 302             return;
 303         }
 304
 305         /* ran out of good intentions so finish with error */
 306         if (!request->result) {
 307             if (!(request->flags & ATA_R_QUIET)) {
 308                 if (request->dev) {
 309                     device_printf(request->dev, "FAILURE - %s timed out",
 310                                   ata_cmd2str(request));
 311                     if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
 312                         kprintf(" LBA=%ju", request->u.ata.lba);
 313                     kprintf("\n");
 314                 }
 315             }
 316             request->result = EIO;
 317         }
 318     }
 319     else if (!(request->flags & ATA_R_ATAPI) ){
 320         /* if this is a soft ECC error warn about it */
 321         /* XXX SOS we could do WARF here */
 322         if ((request->status & (ATA_S_CORR | ATA_S_ERROR)) == ATA_S_CORR) {
 323             device_printf(request->dev,
 324                           "WARNING - %s soft error (ECC corrected)",
 325                           ata_cmd2str(request));
 326             if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
 327                 kprintf(" LBA=%ju", request->u.ata.lba);
 328             kprintf("\n");
 329         }
 330
 331         /* if this is a UDMA CRC error we reinject if there are retries left */
 332         if (request->flags & ATA_R_DMA && request->error & ATA_E_ICRC) {
 333             if (request->retries-- > 0) {
 334                 device_printf(request->dev,
 335                               "WARNING - %s UDMA ICRC error (retrying request)",
 336                               ata_cmd2str(request));
 337                 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
 338                     kprintf(" LBA=%ju", request->u.ata.lba);
 339                 kprintf("\n");
 340                 request->flags |= (ATA_R_AT_HEAD | ATA_R_REQUEUE);
 341                 ata_queue_request(request);
 342                 return;
 343             }
 344         }
 345     }
 346
 347     switch (request->flags & ATA_R_ATAPI) {
 348
 349     /* ATA errors */
 350     default:
 351         if (!request->result && request->status & ATA_S_ERROR) {
 352             if (!(request->flags & ATA_R_QUIET)) {
 353                 device_printf(request->dev,
 354                               "FAILURE - %s status=%b error=%b",
 355                               ata_cmd2str(request),
 356                               request->status, "\20\10BUSY\7READY\6DMA_READY"
 357                               "\5DSC\4DRQ\3CORRECTABLE\2INDEX\1ERROR",
 358                               request->error, "\20\10ICRC\7UNCORRECTABLE"
 359                               "\6MEDIA_CHANGED\5NID_NOT_FOUND"
 360                               "\4MEDIA_CHANGE_REQEST"
 361                               "\3ABORTED\2NO_MEDIA\1ILLEGAL_LENGTH");
 362                 if ((request->flags & ATA_R_DMA) &&
 363                     (request->dmastat & ATA_BMSTAT_ERROR))
 364                     kprintf(" dma=0x%02x", request->dmastat);
 365                 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
 366                     kprintf(" LBA=%ju", request->u.ata.lba);
 367                 kprintf("\n");
 368             }
 369             request->result = EIO;
 370         }
 371         break;
 372
 373     /* ATAPI errors */
 374     case ATA_R_ATAPI:
 375         /* skip if result already set */
 376         if (request->result)
 377             break;
 378
 379         /* if we have a sensekey -> request sense from device */
 380         if ((request->error & ATA_E_ATAPI_SENSE_MASK) &&
 381             (request->u.atapi.ccb[0] != ATAPI_REQUEST_SENSE)) {
 382             static u_int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
 383                                         sizeof(struct atapi_sense),
 384                                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 385
 386             request->u.atapi.saved_cmd = request->u.atapi.ccb[0];
 387             bcopy(ccb, request->u.atapi.ccb, 16);
 388             request->data = (caddr_t)&request->u.atapi.sense;
 389             request->bytecount = sizeof(struct atapi_sense);
 390             request->donecount = 0;
 391             request->transfersize = sizeof(struct atapi_sense);
 392             request->timeout = 5;
 393             request->flags &= (ATA_R_ATAPI | ATA_R_QUIET);
 394             request->flags |= (ATA_R_READ | ATA_R_AT_HEAD | ATA_R_REQUEUE);
 395             ATA_DEBUG_RQ(request, "autoissue request sense");
 396             ata_queue_request(request);
 397             return;
 398         }
 399
 400         switch (request->u.atapi.sense.key & ATA_SENSE_KEY_MASK) {
 401         case ATA_SENSE_RECOVERED_ERROR:
 402             device_printf(request->dev, "WARNING - %s recovered error\n",
 403                           ata_cmd2str(request));
 404             /* FALLTHROUGH */
 405
 406         case ATA_SENSE_NO_SENSE:
 407             request->result = 0;
 408             break;
 409
 410         case ATA_SENSE_NOT_READY:
 411             request->result = EBUSY;
 412             break;
 413
 414         case ATA_SENSE_UNIT_ATTENTION:
 415             atadev->flags |= ATA_D_MEDIA_CHANGED;
 416             request->result = EIO;
 417             break;
 418
 419         default:
 420             request->result = EIO;
 421             if (request->flags & ATA_R_QUIET)
 422                 break;
 423
 424             device_printf(request->dev,
 425                           "FAILURE - %s %s asc=0x%02x ascq=0x%02x ",
 426                           ata_cmd2str(request), ata_skey2str(
 427                           (request->u.atapi.sense.key & ATA_SENSE_KEY_MASK)),
 428                           request->u.atapi.sense.asc,
 429                           request->u.atapi.sense.ascq);
 430             if (request->u.atapi.sense.specific & ATA_SENSE_SPEC_VALID)
 431                 kprintf("sks=0x%02x 0x%02x 0x%02x\n",
 432                        request->u.atapi.sense.specific & ATA_SENSE_SPEC_MASK,
 433                        request->u.atapi.sense.specific1,
 434                        request->u.atapi.sense.specific2);
 435             else
 436                 kprintf("\n");
 437         }
 438
 439         if ((request->u.atapi.sense.key & ATA_SENSE_KEY_MASK ?
 440              request->u.atapi.sense.key & ATA_SENSE_KEY_MASK :
 441              request->error))
 442             request->result = EIO;
 443     }
 444
 445     ATA_DEBUG_RQ(request, "completed callback/wakeup");
 446
 447     /* if we are part of a composite operation we need to maintain progress */
 448     if ((composite = request->composite)) {
 449         int index = 0;
 450
 451         spin_lock_wr(&composite->lock);
 452
 453         /* update whats done */
 454         if (request->flags & ATA_R_READ)
 455             composite->rd_done |= (1 << request->this);
 456         if (request->flags & ATA_R_WRITE)
 457             composite->wr_done |= (1 << request->this);
 458
 459         /* find ready to go dependencies */
 460         if (composite->wr_depend &&
 461             (composite->rd_done & composite->wr_depend)==composite->wr_depend &&
 462             (composite->wr_needed & (~composite->wr_done))) {
 463             index = composite->wr_needed & ~composite->wr_done;
 464         }
 465
 466         spin_unlock_wr(&composite->lock);
 467
 468         /* if we have any ready candidates kick them off */
 469         if (index) {
 470             int bit;
 471
 472             for (bit = 0; bit < MAX_COMPOSITES; bit++) {
 473                 if (index & (1 << bit))
 474                     ata_start(device_get_parent(composite->request[bit]->dev));
 475             }
 476         }
 477     }
 478
 479     /* get results back to the initiator for this request */
 480     if (request->callback)
 481         (request->callback)(request);
 482     else {
 483         spin_lock_wr(&request->done);
 484         request->flags |= ATA_R_COMPLETED;
 485         spin_unlock_wr(&request->done);
 486         wakeup_one(request);
 487     }
 488
 489     /* only call ata_start if channel is present */
 490     if (ch)
 491         ata_start(ch->dev);
 492 }
 493
 494 void
 495 ata_timeout(struct ata_request *request)
 496 {
 497     struct ata_channel *ch = device_get_softc(request->parent);
 498
 499     /* acquire state_mtx, softclock_handler() doesn't do this for us */
 500     spin_lock_wr(&ch->state_mtx);
 501
 502     /*request->flags |= ATA_R_DEBUG;*/
 503     ATA_DEBUG_RQ(request, "timeout");
 504
 505     /*
 506      * if we have an ATA_ACTIVE request running, we flag the request
 507      * ATA_R_TIMEOUT so ata_finish will handle it correctly
 508      * also NULL out the running request so we wont loose
 509      * the race with an eventual interrupt arriving late
 510      */
 511     if (ch->state == ATA_ACTIVE) {
 512         request->flags |= ATA_R_TIMEOUT;
 513         spin_unlock_wr(&ch->state_mtx);
 514         ATA_LOCKING(ch->dev, ATA_LF_UNLOCK);
 515         ata_finish(request);
 516     }
 517     else {
 518         spin_unlock_wr(&ch->state_mtx);
 519     }
 520 }
 521
 522 void
 523 ata_fail_requests(device_t dev)
 524 {
 525     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
 526     struct ata_request *request, *tmp;
 527     TAILQ_HEAD(, ata_request) fail_requests;
 528     TAILQ_INIT(&fail_requests);
 529
 530     /* grap all channel locks to avoid races */
 531     spin_lock_wr(&ch->queue_mtx);
 532     spin_lock_wr(&ch->state_mtx);
 533
 534     /* do we have any running request to care about ? */
 535     if ((request = ch->running) && (!dev || request->dev == dev)) {
 536         callout_stop(&request->callout);
 537         ch->running = NULL;
 538         request->result = ENXIO;
 539         TAILQ_INSERT_TAIL(&fail_requests, request, chain);
 540     }
 541
 542     /* fail all requests queued on this channel for device dev if !NULL */
 543     TAILQ_FOREACH_MUTABLE(request, &ch->ata_queue, chain, tmp) {
 544         if (!dev || request->dev == dev) {
 545             TAILQ_REMOVE(&ch->ata_queue, request, chain);
 546             request->result = ENXIO;
 547             TAILQ_INSERT_TAIL(&fail_requests, request, chain);
 548         }
 549     }
 550
 551     spin_unlock_wr(&ch->state_mtx);
 552     spin_unlock_wr(&ch->queue_mtx);
 553
 554     /* finish up all requests collected above */
 555     TAILQ_FOREACH_MUTABLE(request, &fail_requests, chain, tmp) {
 556         TAILQ_REMOVE(&fail_requests, request, chain);
 557         ata_finish(request);
 558     }
 559 }
 560
 561 static u_int64_t
 562 ata_get_lba(struct ata_request *request)
 563 {
 564     if (request->flags & ATA_R_ATAPI) {
 565         switch (request->u.atapi.ccb[0]) {
 566         case ATAPI_READ_BIG:
 567         case ATAPI_WRITE_BIG:
 568         case ATAPI_READ_CD:
 569             return (request->u.atapi.ccb[5]) | (request->u.atapi.ccb[4]<<8) |
 570                    (request->u.atapi.ccb[3]<<16)|(request->u.atapi.ccb[2]<<24);
 571         case ATAPI_READ:
 572         case ATAPI_WRITE:
 573             return (request->u.atapi.ccb[4]) | (request->u.atapi.ccb[3]<<8) |
 574                    (request->u.atapi.ccb[2]<<16);
 575         default:
 576             return 0;
 577         }
 578     }
 579     else
 580         return request->u.ata.lba;
 581 }
 582
 583 static void
 584 ata_sort_queue(struct ata_channel *ch, struct ata_request *request)
 585 {
 586     struct ata_request *this, *next;
 587
 588     this = TAILQ_FIRST(&ch->ata_queue);
 589
 590     /* if the queue is empty just insert */
 591     if (!this) {
 592         if (request->composite)
 593             ch->freezepoint = request;
 594         TAILQ_INSERT_TAIL(&ch->ata_queue, request, chain);
 595         return;
 596     }
 597
 598     /* dont sort frozen parts of the queue */
 599     if (ch->freezepoint)
 600         this = ch->freezepoint;
 601
 602     /* if position is less than head we add after tipping point */
 603     if (ata_get_lba(request) < ata_get_lba(this)) {
 604         while ((next = TAILQ_NEXT(this, chain))) {
 605
 606             /* have we reached the tipping point */
 607             if (ata_get_lba(next) < ata_get_lba(this)) {
 608
 609                 /* sort the insert */
 610                 do {
 611                     if (ata_get_lba(request) < ata_get_lba(next))
 612                         break;
 613                     this = next;
 614                 } while ((next = TAILQ_NEXT(this, chain)));
 615                 break;
 616             }
 617             this = next;
 618         }
 619     }
 620
 621     /* we are after head so sort the insert before tipping point */
 622     else {
 623         while ((next = TAILQ_NEXT(this, chain))) {
 624             if (ata_get_lba(next) < ata_get_lba(this) ||
 625                 ata_get_lba(request) < ata_get_lba(next))
 626                 break;
 627             this = next;
 628         }
 629     }
 630
 631     if (request->composite)
 632         ch->freezepoint = request;
 633     TAILQ_INSERT_AFTER(&ch->ata_queue, this, request, chain);
 634 }
 635
 636 char *
 637 ata_cmd2str(struct ata_request *request)
 638 {
 639     static char buffer[20];
 640
 641     if (request->flags & ATA_R_ATAPI) {
 642         switch (request->u.atapi.sense.key ?
 643                 request->u.atapi.saved_cmd : request->u.atapi.ccb[0]) {
 644         case 0x00: return ("TEST_UNIT_READY");
 645         case 0x01: return ("REZERO");
 646         case 0x03: return ("REQUEST_SENSE");
 647         case 0x04: return ("FORMAT");
 648         case 0x08: return ("READ");
 649         case 0x0a: return ("WRITE");
 650         case 0x10: return ("WEOF");
 651         case 0x11: return ("SPACE");
 652         case 0x12: return ("INQUIRY");
 653         case 0x15: return ("MODE_SELECT");
 654         case 0x19: return ("ERASE");
 655         case 0x1a: return ("MODE_SENSE");
 656         case 0x1b: return ("START_STOP");
 657         case 0x1e: return ("PREVENT_ALLOW");
 658         case 0x23: return ("ATAPI_READ_FORMAT_CAPACITIES");
 659         case 0x25: return ("READ_CAPACITY");
 660         case 0x28: return ("READ_BIG");
 661         case 0x2a: return ("WRITE_BIG");
 662         case 0x2b: return ("LOCATE");
 663         case 0x34: return ("READ_POSITION");
 664         case 0x35: return ("SYNCHRONIZE_CACHE");
 665         case 0x3b: return ("WRITE_BUFFER");
 666         case 0x3c: return ("READ_BUFFER");
 667         case 0x42: return ("READ_SUBCHANNEL");
 668         case 0x43: return ("READ_TOC");
 669         case 0x45: return ("PLAY_10");
 670         case 0x47: return ("PLAY_MSF");
 671         case 0x48: return ("PLAY_TRACK");
 672         case 0x4b: return ("PAUSE");
 673         case 0x51: return ("READ_DISK_INFO");
 674         case 0x52: return ("READ_TRACK_INFO");
 675         case 0x53: return ("RESERVE_TRACK");
 676         case 0x54: return ("SEND_OPC_INFO");
 677         case 0x55: return ("MODE_SELECT_BIG");
 678         case 0x58: return ("REPAIR_TRACK");
 679         case 0x59: return ("READ_MASTER_CUE");
 680         case 0x5a: return ("MODE_SENSE_BIG");
 681         case 0x5b: return ("CLOSE_TRACK/SESSION");
 682         case 0x5c: return ("READ_BUFFER_CAPACITY");
 683         case 0x5d: return ("SEND_CUE_SHEET");
 684         case 0x96: return ("SERVICE_ACTION_IN");
 685         case 0xa1: return ("BLANK_CMD");
 686         case 0xa3: return ("SEND_KEY");
 687         case 0xa4: return ("REPORT_KEY");
 688         case 0xa5: return ("PLAY_12");
 689         case 0xa6: return ("LOAD_UNLOAD");
 690         case 0xad: return ("READ_DVD_STRUCTURE");
 691         case 0xb4: return ("PLAY_CD");
 692         case 0xbb: return ("SET_SPEED");
 693         case 0xbd: return ("MECH_STATUS");
 694         case 0xbe: return ("READ_CD");
 695         case 0xff: return ("POLL_DSC");
 696         }
 697     }
 698     else {
 699         switch (request->u.ata.command) {
 700         case 0x00: return ("NOP");
 701         case 0x08: return ("DEVICE_RESET");
 702         case 0x20: return ("READ");
 703         case 0x24: return ("READ48");
 704         case 0x25: return ("READ_DMA48");
 705         case 0x26: return ("READ_DMA_QUEUED48");
 706         case 0x29: return ("READ_MUL48");
 707         case 0x30: return ("WRITE");
 708         case 0x34: return ("WRITE48");
 709         case 0x35: return ("WRITE_DMA48");
 710         case 0x36: return ("WRITE_DMA_QUEUED48");
 711         case 0x39: return ("WRITE_MUL48");
 712         case 0x70: return ("SEEK");
 713         case 0xa0: return ("PACKET_CMD");
 714         case 0xa1: return ("ATAPI_IDENTIFY");
 715         case 0xa2: return ("SERVICE");
 716         case 0xb0: return ("SMART");
 717         case 0xc0: return ("CFA ERASE");
 718         case 0xc4: return ("READ_MUL");
 719         case 0xc5: return ("WRITE_MUL");
 720         case 0xc6: return ("SET_MULTI");
 721         case 0xc7: return ("READ_DMA_QUEUED");
 722         case 0xc8: return ("READ_DMA");
 723         case 0xca: return ("WRITE_DMA");
 724         case 0xcc: return ("WRITE_DMA_QUEUED");
 725         case 0xe6: return ("SLEEP");
 726         case 0xe7: return ("FLUSHCACHE");
 727         case 0xea: return ("FLUSHCACHE48");
 728         case 0xec: return ("ATA_IDENTIFY");
 729         case 0xef:
 730             switch (request->u.ata.feature) {
 731             case 0x03: return ("SETFEATURES SET TRANSFER MODE");
 732             case 0x02: return ("SETFEATURES ENABLE WCACHE");
 733             case 0x82: return ("SETFEATURES DISABLE WCACHE");
 734             case 0xaa: return ("SETFEATURES ENABLE RCACHE");
 735             case 0x55: return ("SETFEATURES DISABLE RCACHE");
 736             }
 737             ksprintf(buffer, "SETFEATURES 0x%02x", request->u.ata.feature);
 738             return buffer;
 739         }
 740     }
 741     ksprintf(buffer, "unknown CMD (0x%02x)", request->u.ata.command);
 742     return buffer;
 743 }
 744
 745 static char *
 746 ata_skey2str(u_int8_t skey)
 747 {
 748     switch (skey) {
 749     case 0x00: return ("NO SENSE");
 750     case 0x01: return ("RECOVERED ERROR");
 751     case 0x02: return ("NOT READY");
 752     case 0x03: return ("MEDIUM ERROR");
 753     case 0x04: return ("HARDWARE ERROR");
 754     case 0x05: return ("ILLEGAL REQUEST");
 755     case 0x06: return ("UNIT ATTENTION");
 756     case 0x07: return ("DATA PROTECT");
 757     case 0x08: return ("BLANK CHECK");
 758     case 0x09: return ("VENDOR SPECIFIC");
 759     case 0x0a: return ("COPY ABORTED");
 760     case 0x0b: return ("ABORTED COMMAND");
 761     case 0x0c: return ("EQUAL");
 762     case 0x0d: return ("VOLUME OVERFLOW");
 763     case 0x0e: return ("MISCOMPARE");
 764     case 0x0f: return ("RESERVED");
 765     default: return("UNKNOWN");
 766     }
 767 }