linux/drivers/ide/ide-cd.c
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   1/*
   2 * ATAPI CD-ROM driver.
   3 *
   4 * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5 * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6 * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7 * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
   8 *
   9 * May be copied or modified under the terms of the GNU General Public
  10 * License.  See linux/COPYING for more information.
  11 *
  12 * See Documentation/cdrom/ide-cd for usage information.
  13 *
  14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15 *
  16 * Documentation:
  17 *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
  18 *
  19 * For historical changelog please see:
  20 *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  21 */
  22
  23#define DRV_NAME "ide-cd"
  24#define PFX DRV_NAME ": "
  25
  26#define IDECD_VERSION "5.00"
  27
  28#include <linux/module.h>
  29#include <linux/types.h>
  30#include <linux/kernel.h>
  31#include <linux/sched/task_stack.h>
  32#include <linux/delay.h>
  33#include <linux/timer.h>
  34#include <linux/seq_file.h>
  35#include <linux/slab.h>
  36#include <linux/interrupt.h>
  37#include <linux/errno.h>
  38#include <linux/cdrom.h>
  39#include <linux/ide.h>
  40#include <linux/completion.h>
  41#include <linux/mutex.h>
  42#include <linux/bcd.h>
  43
  44/* For SCSI -> ATAPI command conversion */
  45#include <scsi/scsi.h>
  46
  47#include <linux/io.h>
  48#include <asm/byteorder.h>
  49#include <linux/uaccess.h>
  50#include <asm/unaligned.h>
  51
  52#include "ide-cd.h"
  53
  54static DEFINE_MUTEX(ide_cd_mutex);
  55static DEFINE_MUTEX(idecd_ref_mutex);
  56
  57static void ide_cd_release(struct device *);
  58
  59static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  60{
  61        struct cdrom_info *cd = NULL;
  62
  63        mutex_lock(&idecd_ref_mutex);
  64        cd = ide_drv_g(disk, cdrom_info);
  65        if (cd) {
  66                if (ide_device_get(cd->drive))
  67                        cd = NULL;
  68                else
  69                        get_device(&cd->dev);
  70
  71        }
  72        mutex_unlock(&idecd_ref_mutex);
  73        return cd;
  74}
  75
  76static void ide_cd_put(struct cdrom_info *cd)
  77{
  78        ide_drive_t *drive = cd->drive;
  79
  80        mutex_lock(&idecd_ref_mutex);
  81        put_device(&cd->dev);
  82        ide_device_put(drive);
  83        mutex_unlock(&idecd_ref_mutex);
  84}
  85
  86/*
  87 * Generic packet command support and error handling routines.
  88 */
  89
  90/* Mark that we've seen a media change and invalidate our internal buffers. */
  91static void cdrom_saw_media_change(ide_drive_t *drive)
  92{
  93        drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  94        drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  95}
  96
  97static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
  98{
  99        struct request_sense *sense = &drive->sense_data;
 100        int log = 0;
 101
 102        if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
 103                return 0;
 104
 105        ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 106
 107        switch (sense->sense_key) {
 108        case NO_SENSE:
 109        case RECOVERED_ERROR:
 110                break;
 111        case NOT_READY:
 112                /*
 113                 * don't care about tray state messages for e.g. capacity
 114                 * commands or in-progress or becoming ready
 115                 */
 116                if (sense->asc == 0x3a || sense->asc == 0x04)
 117                        break;
 118                log = 1;
 119                break;
 120        case ILLEGAL_REQUEST:
 121                /*
 122                 * don't log START_STOP unit with LoEj set, since we cannot
 123                 * reliably check if drive can auto-close
 124                 */
 125                if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 126                        break;
 127                log = 1;
 128                break;
 129        case UNIT_ATTENTION:
 130                /*
 131                 * Make good and sure we've seen this potential media change.
 132                 * Some drives (i.e. Creative) fail to present the correct sense
 133                 * key in the error register.
 134                 */
 135                cdrom_saw_media_change(drive);
 136                break;
 137        default:
 138                log = 1;
 139                break;
 140        }
 141        return log;
 142}
 143
 144static void cdrom_analyze_sense_data(ide_drive_t *drive,
 145                                     struct request *failed_command)
 146{
 147        struct request_sense *sense = &drive->sense_data;
 148        struct cdrom_info *info = drive->driver_data;
 149        unsigned long sector;
 150        unsigned long bio_sectors;
 151
 152        ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 153                                     sense->error_code, sense->sense_key);
 154
 155        if (failed_command)
 156                ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 157                                             failed_command->cmd[0]);
 158
 159        if (!cdrom_log_sense(drive, failed_command))
 160                return;
 161
 162        /*
 163         * If a read toc is executed for a CD-R or CD-RW medium where the first
 164         * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 165         * confusing error)
 166         */
 167        if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 168                if (sense->sense_key == 0x05 && sense->asc == 0x24)
 169                        return;
 170
 171        /* current error */
 172        if (sense->error_code == 0x70) {
 173                switch (sense->sense_key) {
 174                case MEDIUM_ERROR:
 175                case VOLUME_OVERFLOW:
 176                case ILLEGAL_REQUEST:
 177                        if (!sense->valid)
 178                                break;
 179                        if (failed_command == NULL ||
 180                            blk_rq_is_passthrough(failed_command))
 181                                break;
 182                        sector = (sense->information[0] << 24) |
 183                                 (sense->information[1] << 16) |
 184                                 (sense->information[2] <<  8) |
 185                                 (sense->information[3]);
 186
 187                        if (queue_logical_block_size(drive->queue) == 2048)
 188                                /* device sector size is 2K */
 189                                sector <<= 2;
 190
 191                        bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 192                        sector &= ~(bio_sectors - 1);
 193
 194                        /*
 195                         * The SCSI specification allows for the value
 196                         * returned by READ CAPACITY to be up to 75 2K
 197                         * sectors past the last readable block.
 198                         * Therefore, if we hit a medium error within the
 199                         * last 75 2K sectors, we decrease the saved size
 200                         * value.
 201                         */
 202                        if (sector < get_capacity(info->disk) &&
 203                            drive->probed_capacity - sector < 4 * 75)
 204                                set_capacity(info->disk, sector);
 205                }
 206        }
 207
 208        ide_cd_log_error(drive->name, failed_command, sense);
 209}
 210
 211static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 212{
 213        /*
 214         * For ATA_PRIV_SENSE, "rq->special" points to the original
 215         * failed request.  Also, the sense data should be read
 216         * directly from rq which might be different from the original
 217         * sense buffer if it got copied during mapping.
 218         */
 219        struct request *failed = (struct request *)rq->special;
 220        void *sense = bio_data(rq->bio);
 221
 222        if (failed) {
 223                /*
 224                 * Sense is always read into drive->sense_data, copy back to the
 225                 * original request.
 226                 */
 227                memcpy(scsi_req(failed)->sense, sense, 18);
 228                scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
 229                cdrom_analyze_sense_data(drive, failed);
 230
 231                if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 232                        BUG();
 233        } else
 234                cdrom_analyze_sense_data(drive, NULL);
 235}
 236
 237
 238/*
 239 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 240 * while flushing data from cache.
 241 *
 242 * returns: 0 failed (write timeout expired)
 243 *          1 success
 244 */
 245static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 246{
 247
 248        struct cdrom_info *info = drive->driver_data;
 249
 250        if (!rq->errors)
 251                info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 252
 253        rq->errors = 1;
 254
 255        if (time_after(jiffies, info->write_timeout))
 256                return 0;
 257        else {
 258                /*
 259                 * take a breather
 260                 */
 261                blk_delay_queue(drive->queue, 1);
 262                return 1;
 263        }
 264}
 265
 266/**
 267 * Returns:
 268 * 0: if the request should be continued.
 269 * 1: if the request will be going through error recovery.
 270 * 2: if the request should be ended.
 271 */
 272static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 273{
 274        ide_hwif_t *hwif = drive->hwif;
 275        struct request *rq = hwif->rq;
 276        int err, sense_key, do_end_request = 0;
 277
 278        /* get the IDE error register */
 279        err = ide_read_error(drive);
 280        sense_key = err >> 4;
 281
 282        ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 283                                  "stat 0x%x",
 284                                  rq->cmd[0], rq->cmd_type, err, stat);
 285
 286        if (ata_sense_request(rq)) {
 287                /*
 288                 * We got an error trying to get sense info from the drive
 289                 * (probably while trying to recover from a former error).
 290                 * Just give up.
 291                 */
 292                rq->rq_flags |= RQF_FAILED;
 293                return 2;
 294        }
 295
 296        /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 297        if (blk_rq_is_scsi(rq) && !rq->errors)
 298                rq->errors = SAM_STAT_CHECK_CONDITION;
 299
 300        if (blk_noretry_request(rq))
 301                do_end_request = 1;
 302
 303        switch (sense_key) {
 304        case NOT_READY:
 305                if (req_op(rq) == REQ_OP_WRITE) {
 306                        if (ide_cd_breathe(drive, rq))
 307                                return 1;
 308                } else {
 309                        cdrom_saw_media_change(drive);
 310
 311                        if (!blk_rq_is_passthrough(rq) &&
 312                            !(rq->rq_flags & RQF_QUIET))
 313                                printk(KERN_ERR PFX "%s: tray open\n",
 314                                        drive->name);
 315                }
 316                do_end_request = 1;
 317                break;
 318        case UNIT_ATTENTION:
 319                cdrom_saw_media_change(drive);
 320
 321                if (blk_rq_is_passthrough(rq))
 322                        return 0;
 323
 324                /*
 325                 * Arrange to retry the request but be sure to give up if we've
 326                 * retried too many times.
 327                 */
 328                if (++rq->errors > ERROR_MAX)
 329                        do_end_request = 1;
 330                break;
 331        case ILLEGAL_REQUEST:
 332                /*
 333                 * Don't print error message for this condition -- SFF8090i
 334                 * indicates that 5/24/00 is the correct response to a request
 335                 * to close the tray if the drive doesn't have that capability.
 336                 *
 337                 * cdrom_log_sense() knows this!
 338                 */
 339                if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
 340                        break;
 341                /* fall-through */
 342        case DATA_PROTECT:
 343                /*
 344                 * No point in retrying after an illegal request or data
 345                 * protect error.
 346                 */
 347                if (!(rq->rq_flags & RQF_QUIET))
 348                        ide_dump_status(drive, "command error", stat);
 349                do_end_request = 1;
 350                break;
 351        case MEDIUM_ERROR:
 352                /*
 353                 * No point in re-trying a zillion times on a bad sector.
 354                 * If we got here the error is not correctable.
 355                 */
 356                if (!(rq->rq_flags & RQF_QUIET))
 357                        ide_dump_status(drive, "media error "
 358                                        "(bad sector)", stat);
 359                do_end_request = 1;
 360                break;
 361        case BLANK_CHECK:
 362                /* disk appears blank? */
 363                if (!(rq->rq_flags & RQF_QUIET))
 364                        ide_dump_status(drive, "media error (blank)",
 365                                        stat);
 366                do_end_request = 1;
 367                break;
 368        default:
 369                if (blk_rq_is_passthrough(rq))
 370                        break;
 371                if (err & ~ATA_ABORTED) {
 372                        /* go to the default handler for other errors */
 373                        ide_error(drive, "cdrom_decode_status", stat);
 374                        return 1;
 375                } else if (++rq->errors > ERROR_MAX)
 376                        /* we've racked up too many retries, abort */
 377                        do_end_request = 1;
 378        }
 379
 380        if (blk_rq_is_passthrough(rq)) {
 381                rq->rq_flags |= RQF_FAILED;
 382                do_end_request = 1;
 383        }
 384
 385        /*
 386         * End a request through request sense analysis when we have sense data.
 387         * We need this in order to perform end of media processing.
 388         */
 389        if (do_end_request)
 390                goto end_request;
 391
 392        /* if we got a CHECK_CONDITION status, queue a request sense command */
 393        if (stat & ATA_ERR)
 394                return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 395        return 1;
 396
 397end_request:
 398        if (stat & ATA_ERR) {
 399                hwif->rq = NULL;
 400                return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 401        } else
 402                return 2;
 403}
 404
 405static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 406{
 407        struct request *rq = cmd->rq;
 408
 409        ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 410
 411        /*
 412         * Some of the trailing request sense fields are optional,
 413         * and some drives don't send them.  Sigh.
 414         */
 415        if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
 416            cmd->nleft > 0 && cmd->nleft <= 5)
 417                cmd->nleft = 0;
 418}
 419
 420int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 421                    int write, void *buffer, unsigned *bufflen,
 422                    struct request_sense *sense, int timeout,
 423                    req_flags_t rq_flags)
 424{
 425        struct cdrom_info *info = drive->driver_data;
 426        int retries = 10;
 427        bool failed;
 428
 429        ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 430                                  "rq_flags: 0x%x",
 431                                  cmd[0], write, timeout, rq_flags);
 432
 433        /* start of retry loop */
 434        do {
 435                struct request *rq;
 436                int error;
 437                bool delay = false;
 438
 439                rq = blk_get_request(drive->queue,
 440                        write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,  __GFP_RECLAIM);
 441                scsi_req_init(rq);
 442                memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
 443                ide_req(rq)->type = ATA_PRIV_PC;
 444                rq->rq_flags |= rq_flags;
 445                rq->timeout = timeout;
 446                if (buffer) {
 447                        error = blk_rq_map_kern(drive->queue, rq, buffer,
 448                                                *bufflen, GFP_NOIO);
 449                        if (error) {
 450                                blk_put_request(rq);
 451                                return error;
 452                        }
 453                }
 454
 455                error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 456
 457                if (buffer)
 458                        *bufflen = scsi_req(rq)->resid_len;
 459                if (sense)
 460                        memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
 461
 462                /*
 463                 * FIXME: we should probably abort/retry or something in case of
 464                 * failure.
 465                 */
 466                failed = (rq->rq_flags & RQF_FAILED) != 0;
 467                if (failed) {
 468                        /*
 469                         * The request failed.  Retry if it was due to a unit
 470                         * attention status (usually means media was changed).
 471                         */
 472                        struct request_sense *reqbuf = scsi_req(rq)->sense;
 473
 474                        if (reqbuf->sense_key == UNIT_ATTENTION)
 475                                cdrom_saw_media_change(drive);
 476                        else if (reqbuf->sense_key == NOT_READY &&
 477                                 reqbuf->asc == 4 && reqbuf->ascq != 4) {
 478                                /*
 479                                 * The drive is in the process of loading
 480                                 * a disk.  Retry, but wait a little to give
 481                                 * the drive time to complete the load.
 482                                 */
 483                                delay = true;
 484                        } else {
 485                                /* otherwise, don't retry */
 486                                retries = 0;
 487                        }
 488                        --retries;
 489                }
 490                blk_put_request(rq);
 491                if (delay)
 492                        ssleep(2);
 493        } while (failed && retries >= 0);
 494
 495        /* return an error if the command failed */
 496        return failed ? -EIO : 0;
 497}
 498
 499/*
 500 * returns true if rq has been completed
 501 */
 502static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 503{
 504        unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 505
 506        if (cmd->tf_flags & IDE_TFLAG_WRITE)
 507                nr_bytes -= cmd->last_xfer_len;
 508
 509        if (nr_bytes > 0) {
 510                ide_complete_rq(drive, 0, nr_bytes);
 511                return true;
 512        }
 513
 514        return false;
 515}
 516
 517static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 518{
 519        ide_hwif_t *hwif = drive->hwif;
 520        struct ide_cmd *cmd = &hwif->cmd;
 521        struct request *rq = hwif->rq;
 522        ide_expiry_t *expiry = NULL;
 523        int dma_error = 0, dma, thislen, uptodate = 0;
 524        int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 525        int sense = ata_sense_request(rq);
 526        unsigned int timeout;
 527        u16 len;
 528        u8 ireason, stat;
 529
 530        ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 531
 532        /* check for errors */
 533        dma = drive->dma;
 534        if (dma) {
 535                drive->dma = 0;
 536                drive->waiting_for_dma = 0;
 537                dma_error = hwif->dma_ops->dma_end(drive);
 538                ide_dma_unmap_sg(drive, cmd);
 539                if (dma_error) {
 540                        printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 541                                        write ? "write" : "read");
 542                        ide_dma_off(drive);
 543                }
 544        }
 545
 546        /* check status */
 547        stat = hwif->tp_ops->read_status(hwif);
 548
 549        if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 550                rc = cdrom_decode_status(drive, stat);
 551                if (rc) {
 552                        if (rc == 2)
 553                                goto out_end;
 554                        return ide_stopped;
 555                }
 556        }
 557
 558        /* using dma, transfer is complete now */
 559        if (dma) {
 560                if (dma_error)
 561                        return ide_error(drive, "dma error", stat);
 562                uptodate = 1;
 563                goto out_end;
 564        }
 565
 566        ide_read_bcount_and_ireason(drive, &len, &ireason);
 567
 568        thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
 569        if (thislen > len)
 570                thislen = len;
 571
 572        ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 573                                  stat, thislen);
 574
 575        /* If DRQ is clear, the command has completed. */
 576        if ((stat & ATA_DRQ) == 0) {
 577                switch (req_op(rq)) {
 578                default:
 579                        /*
 580                         * If we're not done reading/writing, complain.
 581                         * Otherwise, complete the command normally.
 582                         */
 583                        uptodate = 1;
 584                        if (cmd->nleft > 0) {
 585                                printk(KERN_ERR PFX "%s: %s: data underrun "
 586                                        "(%u bytes)\n", drive->name, __func__,
 587                                        cmd->nleft);
 588                                if (!write)
 589                                        rq->rq_flags |= RQF_FAILED;
 590                                uptodate = 0;
 591                        }
 592                        goto out_end;
 593                case REQ_OP_DRV_IN:
 594                case REQ_OP_DRV_OUT:
 595                        ide_cd_request_sense_fixup(drive, cmd);
 596
 597                        uptodate = cmd->nleft ? 0 : 1;
 598
 599                        /*
 600                         * suck out the remaining bytes from the drive in an
 601                         * attempt to complete the data xfer. (see BZ#13399)
 602                         */
 603                        if (!(stat & ATA_ERR) && !uptodate && thislen) {
 604                                ide_pio_bytes(drive, cmd, write, thislen);
 605                                uptodate = cmd->nleft ? 0 : 1;
 606                        }
 607
 608                        if (!uptodate)
 609                                rq->rq_flags |= RQF_FAILED;
 610                        goto out_end;
 611                case REQ_OP_SCSI_IN:
 612                case REQ_OP_SCSI_OUT:
 613                        goto out_end;
 614                }
 615        }
 616
 617        rc = ide_check_ireason(drive, rq, len, ireason, write);
 618        if (rc)
 619                goto out_end;
 620
 621        cmd->last_xfer_len = 0;
 622
 623        ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 624                                  "ireason: 0x%x",
 625                                  rq->cmd_type, ireason);
 626
 627        /* transfer data */
 628        while (thislen > 0) {
 629                int blen = min_t(int, thislen, cmd->nleft);
 630
 631                if (cmd->nleft == 0)
 632                        break;
 633
 634                ide_pio_bytes(drive, cmd, write, blen);
 635                cmd->last_xfer_len += blen;
 636
 637                thislen -= blen;
 638                len -= blen;
 639
 640                if (sense && write == 0)
 641                        scsi_req(rq)->sense_len += blen;
 642        }
 643
 644        /* pad, if necessary */
 645        if (len > 0) {
 646                if (blk_rq_is_passthrough(rq) || write == 0)
 647                        ide_pad_transfer(drive, write, len);
 648                else {
 649                        printk(KERN_ERR PFX "%s: confused, missing data\n",
 650                                drive->name);
 651                        blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 652                }
 653        }
 654
 655        switch (req_op(rq)) {
 656        case REQ_OP_SCSI_IN:
 657        case REQ_OP_SCSI_OUT:
 658                timeout = rq->timeout;
 659                break;
 660        case REQ_OP_DRV_IN:
 661        case REQ_OP_DRV_OUT:
 662                expiry = ide_cd_expiry;
 663                /*FALLTHRU*/
 664        default:
 665                timeout = ATAPI_WAIT_PC;
 666                break;
 667        }
 668
 669        hwif->expiry = expiry;
 670        ide_set_handler(drive, cdrom_newpc_intr, timeout);
 671        return ide_started;
 672
 673out_end:
 674        if (blk_rq_is_scsi(rq) && rc == 0) {
 675                scsi_req(rq)->resid_len = 0;
 676                blk_end_request_all(rq, 0);
 677                hwif->rq = NULL;
 678        } else {
 679                if (sense && uptodate)
 680                        ide_cd_complete_failed_rq(drive, rq);
 681
 682                if (!blk_rq_is_passthrough(rq)) {
 683                        if (cmd->nleft == 0)
 684                                uptodate = 1;
 685                } else {
 686                        if (uptodate <= 0 && rq->errors == 0)
 687                                rq->errors = -EIO;
 688                }
 689
 690                if (uptodate == 0 && rq->bio)
 691                        if (ide_cd_error_cmd(drive, cmd))
 692                                return ide_stopped;
 693
 694                /* make sure it's fully ended */
 695                if (blk_rq_is_passthrough(rq)) {
 696                        scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
 697                        if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 698                                scsi_req(rq)->resid_len += cmd->last_xfer_len;
 699                }
 700
 701                ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 702
 703                if (sense && rc == 2)
 704                        ide_error(drive, "request sense failure", stat);
 705        }
 706        return ide_stopped;
 707}
 708
 709static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 710{
 711        struct cdrom_info *cd = drive->driver_data;
 712        struct request_queue *q = drive->queue;
 713        int write = rq_data_dir(rq) == WRITE;
 714        unsigned short sectors_per_frame =
 715                queue_logical_block_size(q) >> SECTOR_BITS;
 716
 717        ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 718                                  "secs_per_frame: %u",
 719                                  rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 720
 721        if (write) {
 722                /* disk has become write protected */
 723                if (get_disk_ro(cd->disk))
 724                        return ide_stopped;
 725        } else {
 726                /*
 727                 * We may be retrying this request after an error.  Fix up any
 728                 * weirdness which might be present in the request packet.
 729                 */
 730                q->prep_rq_fn(q, rq);
 731        }
 732
 733        /* fs requests *must* be hardware frame aligned */
 734        if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 735            (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 736                return ide_stopped;
 737
 738        /* use DMA, if possible */
 739        drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 740
 741        if (write)
 742                cd->devinfo.media_written = 1;
 743
 744        rq->timeout = ATAPI_WAIT_PC;
 745
 746        return ide_started;
 747}
 748
 749static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 750{
 751
 752        ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 753                                  rq->cmd[0], rq->cmd_type);
 754
 755        if (blk_rq_is_scsi(rq))
 756                rq->rq_flags |= RQF_QUIET;
 757        else
 758                rq->rq_flags &= ~RQF_FAILED;
 759
 760        drive->dma = 0;
 761
 762        /* sg request */
 763        if (rq->bio) {
 764                struct request_queue *q = drive->queue;
 765                char *buf = bio_data(rq->bio);
 766                unsigned int alignment;
 767
 768                drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 769
 770                /*
 771                 * check if dma is safe
 772                 *
 773                 * NOTE! The "len" and "addr" checks should possibly have
 774                 * separate masks.
 775                 */
 776                alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 777                if ((unsigned long)buf & alignment
 778                    || blk_rq_bytes(rq) & q->dma_pad_mask
 779                    || object_is_on_stack(buf))
 780                        drive->dma = 0;
 781        }
 782}
 783
 784static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 785                                        sector_t block)
 786{
 787        struct ide_cmd cmd;
 788        int uptodate = 0;
 789        unsigned int nsectors;
 790
 791        ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 792                                  rq->cmd[0], (unsigned long long)block);
 793
 794        if (drive->debug_mask & IDE_DBG_RQ)
 795                blk_dump_rq_flags(rq, "ide_cd_do_request");
 796
 797        switch (req_op(rq)) {
 798        default:
 799                if (cdrom_start_rw(drive, rq) == ide_stopped)
 800                        goto out_end;
 801                break;
 802        case REQ_OP_SCSI_IN:
 803        case REQ_OP_SCSI_OUT:
 804        handle_pc:
 805                if (!rq->timeout)
 806                        rq->timeout = ATAPI_WAIT_PC;
 807                cdrom_do_block_pc(drive, rq);
 808                break;
 809        case REQ_OP_DRV_IN:
 810        case REQ_OP_DRV_OUT:
 811                switch (ide_req(rq)->type) {
 812                case ATA_PRIV_MISC:
 813                        /* right now this can only be a reset... */
 814                        uptodate = 1;
 815                        goto out_end;
 816                case ATA_PRIV_SENSE:
 817                case ATA_PRIV_PC:
 818                        goto handle_pc;
 819                default:
 820                        BUG();
 821                }
 822        }
 823
 824        /* prepare sense request for this command */
 825        ide_prep_sense(drive, rq);
 826
 827        memset(&cmd, 0, sizeof(cmd));
 828
 829        if (rq_data_dir(rq))
 830                cmd.tf_flags |= IDE_TFLAG_WRITE;
 831
 832        cmd.rq = rq;
 833
 834        if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
 835                ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 836                ide_map_sg(drive, &cmd);
 837        }
 838
 839        return ide_issue_pc(drive, &cmd);
 840out_end:
 841        nsectors = blk_rq_sectors(rq);
 842
 843        if (nsectors == 0)
 844                nsectors = 1;
 845
 846        ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 847
 848        return ide_stopped;
 849}
 850
 851/*
 852 * Ioctl handling.
 853 *
 854 * Routines which queue packet commands take as a final argument a pointer to a
 855 * request_sense struct. If execution of the command results in an error with a
 856 * CHECK CONDITION status, this structure will be filled with the results of the
 857 * subsequent request sense command. The pointer can also be NULL, in which case
 858 * no sense information is returned.
 859 */
 860static void msf_from_bcd(struct atapi_msf *msf)
 861{
 862        msf->minute = bcd2bin(msf->minute);
 863        msf->second = bcd2bin(msf->second);
 864        msf->frame  = bcd2bin(msf->frame);
 865}
 866
 867int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 868{
 869        struct cdrom_info *info = drive->driver_data;
 870        struct cdrom_device_info *cdi = &info->devinfo;
 871        unsigned char cmd[BLK_MAX_CDB];
 872
 873        ide_debug_log(IDE_DBG_FUNC, "enter");
 874
 875        memset(cmd, 0, BLK_MAX_CDB);
 876        cmd[0] = GPCMD_TEST_UNIT_READY;
 877
 878        /*
 879         * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 880         * instead of supporting the LOAD_UNLOAD opcode.
 881         */
 882        cmd[7] = cdi->sanyo_slot % 3;
 883
 884        return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
 885}
 886
 887static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 888                               unsigned long *sectors_per_frame,
 889                               struct request_sense *sense)
 890{
 891        struct {
 892                __be32 lba;
 893                __be32 blocklen;
 894        } capbuf;
 895
 896        int stat;
 897        unsigned char cmd[BLK_MAX_CDB];
 898        unsigned len = sizeof(capbuf);
 899        u32 blocklen;
 900
 901        ide_debug_log(IDE_DBG_FUNC, "enter");
 902
 903        memset(cmd, 0, BLK_MAX_CDB);
 904        cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 905
 906        stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 907                               RQF_QUIET);
 908        if (stat)
 909                return stat;
 910
 911        /*
 912         * Sanity check the given block size, in so far as making
 913         * sure the sectors_per_frame we give to the caller won't
 914         * end up being bogus.
 915         */
 916        blocklen = be32_to_cpu(capbuf.blocklen);
 917        blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 918        switch (blocklen) {
 919        case 512:
 920        case 1024:
 921        case 2048:
 922        case 4096:
 923                break;
 924        default:
 925                printk_once(KERN_ERR PFX "%s: weird block size %u; "
 926                                "setting default block size to 2048\n",
 927                                drive->name, blocklen);
 928                blocklen = 2048;
 929                break;
 930        }
 931
 932        *capacity = 1 + be32_to_cpu(capbuf.lba);
 933        *sectors_per_frame = blocklen >> SECTOR_BITS;
 934
 935        ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 936                                     *capacity, *sectors_per_frame);
 937
 938        return 0;
 939}
 940
 941static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 942                                int format, char *buf, int buflen,
 943                                struct request_sense *sense)
 944{
 945        unsigned char cmd[BLK_MAX_CDB];
 946
 947        ide_debug_log(IDE_DBG_FUNC, "enter");
 948
 949        memset(cmd, 0, BLK_MAX_CDB);
 950
 951        cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 952        cmd[6] = trackno;
 953        cmd[7] = (buflen >> 8);
 954        cmd[8] = (buflen & 0xff);
 955        cmd[9] = (format << 6);
 956
 957        if (msf_flag)
 958                cmd[1] = 2;
 959
 960        return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
 961}
 962
 963/* Try to read the entire TOC for the disk into our internal buffer. */
 964int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 965{
 966        int stat, ntracks, i;
 967        struct cdrom_info *info = drive->driver_data;
 968        struct cdrom_device_info *cdi = &info->devinfo;
 969        struct atapi_toc *toc = info->toc;
 970        struct {
 971                struct atapi_toc_header hdr;
 972                struct atapi_toc_entry  ent;
 973        } ms_tmp;
 974        long last_written;
 975        unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 976
 977        ide_debug_log(IDE_DBG_FUNC, "enter");
 978
 979        if (toc == NULL) {
 980                /* try to allocate space */
 981                toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 982                if (toc == NULL) {
 983                        printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 984                                        drive->name);
 985                        return -ENOMEM;
 986                }
 987                info->toc = toc;
 988        }
 989
 990        /*
 991         * Check to see if the existing data is still valid. If it is,
 992         * just return.
 993         */
 994        (void) cdrom_check_status(drive, sense);
 995
 996        if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 997                return 0;
 998
 999        /* try to get the total cdrom capacity and sector size */
1000        stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1001                                   sense);
1002        if (stat)
1003                toc->capacity = 0x1fffff;
1004
1005        set_capacity(info->disk, toc->capacity * sectors_per_frame);
1006        /* save a private copy of the TOC capacity for error handling */
1007        drive->probed_capacity = toc->capacity * sectors_per_frame;
1008
1009        blk_queue_logical_block_size(drive->queue,
1010                                     sectors_per_frame << SECTOR_BITS);
1011
1012        /* first read just the header, so we know how long the TOC is */
1013        stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1014                                    sizeof(struct atapi_toc_header), sense);
1015        if (stat)
1016                return stat;
1017
1018        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1019                toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1020                toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1021        }
1022
1023        ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1024        if (ntracks <= 0)
1025                return -EIO;
1026        if (ntracks > MAX_TRACKS)
1027                ntracks = MAX_TRACKS;
1028
1029        /* now read the whole schmeer */
1030        stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1031                                  (char *)&toc->hdr,
1032                                   sizeof(struct atapi_toc_header) +
1033                                   (ntracks + 1) *
1034                                   sizeof(struct atapi_toc_entry), sense);
1035
1036        if (stat && toc->hdr.first_track > 1) {
1037                /*
1038                 * Cds with CDI tracks only don't have any TOC entries, despite
1039                 * of this the returned values are
1040                 * first_track == last_track = number of CDI tracks + 1,
1041                 * so that this case is indistinguishable from the same layout
1042                 * plus an additional audio track. If we get an error for the
1043                 * regular case, we assume a CDI without additional audio
1044                 * tracks. In this case the readable TOC is empty (CDI tracks
1045                 * are not included) and only holds the Leadout entry.
1046                 *
1047                 * Heiko Eißfeldt.
1048                 */
1049                ntracks = 0;
1050                stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1051                                           (char *)&toc->hdr,
1052                                           sizeof(struct atapi_toc_header) +
1053                                           (ntracks + 1) *
1054                                           sizeof(struct atapi_toc_entry),
1055                                           sense);
1056                if (stat)
1057                        return stat;
1058
1059                if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060                        toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1061                        toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1062                } else {
1063                        toc->hdr.first_track = CDROM_LEADOUT;
1064                        toc->hdr.last_track = CDROM_LEADOUT;
1065                }
1066        }
1067
1068        if (stat)
1069                return stat;
1070
1071        toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1072
1073        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1074                toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1075                toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1076        }
1077
1078        for (i = 0; i <= ntracks; i++) {
1079                if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1080                        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1081                                toc->ent[i].track = bcd2bin(toc->ent[i].track);
1082                        msf_from_bcd(&toc->ent[i].addr.msf);
1083                }
1084                toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1085                                                  toc->ent[i].addr.msf.second,
1086                                                  toc->ent[i].addr.msf.frame);
1087        }
1088
1089        if (toc->hdr.first_track != CDROM_LEADOUT) {
1090                /* read the multisession information */
1091                stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1092                                           sizeof(ms_tmp), sense);
1093                if (stat)
1094                        return stat;
1095
1096                toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1097        } else {
1098                ms_tmp.hdr.last_track = CDROM_LEADOUT;
1099                ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1100                toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1101        }
1102
1103        if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1104                /* re-read multisession information using MSF format */
1105                stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1106                                           sizeof(ms_tmp), sense);
1107                if (stat)
1108                        return stat;
1109
1110                msf_from_bcd(&ms_tmp.ent.addr.msf);
1111                toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1112                                                   ms_tmp.ent.addr.msf.second,
1113                                                   ms_tmp.ent.addr.msf.frame);
1114        }
1115
1116        toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1117
1118        /* now try to get the total cdrom capacity */
1119        stat = cdrom_get_last_written(cdi, &last_written);
1120        if (!stat && (last_written > toc->capacity)) {
1121                toc->capacity = last_written;
1122                set_capacity(info->disk, toc->capacity * sectors_per_frame);
1123                drive->probed_capacity = toc->capacity * sectors_per_frame;
1124        }
1125
1126        /* Remember that we've read this stuff. */
1127        drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1128
1129        return 0;
1130}
1131
1132int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1133{
1134        struct cdrom_info *info = drive->driver_data;
1135        struct cdrom_device_info *cdi = &info->devinfo;
1136        struct packet_command cgc;
1137        int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1138
1139        ide_debug_log(IDE_DBG_FUNC, "enter");
1140
1141        if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1142                size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1143
1144        init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1145        do {
1146                /* we seem to get stat=0x01,err=0x00 the first time (??) */
1147                stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1148                if (!stat)
1149                        break;
1150        } while (--attempts);
1151        return stat;
1152}
1153
1154void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1155{
1156        struct cdrom_info *cd = drive->driver_data;
1157        u16 curspeed, maxspeed;
1158
1159        ide_debug_log(IDE_DBG_FUNC, "enter");
1160
1161        if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1162                curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1163                maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1164        } else {
1165                curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1166                maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1167        }
1168
1169        ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1170                                     curspeed, maxspeed);
1171
1172        cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1173        cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1174}
1175
1176#define IDE_CD_CAPABILITIES \
1177        (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1178         CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1179         CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1180         CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1181         CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1182
1183static const struct cdrom_device_ops ide_cdrom_dops = {
1184        .open                   = ide_cdrom_open_real,
1185        .release                = ide_cdrom_release_real,
1186        .drive_status           = ide_cdrom_drive_status,
1187        .check_events           = ide_cdrom_check_events_real,
1188        .tray_move              = ide_cdrom_tray_move,
1189        .lock_door              = ide_cdrom_lock_door,
1190        .select_speed           = ide_cdrom_select_speed,
1191        .get_last_session       = ide_cdrom_get_last_session,
1192        .get_mcn                = ide_cdrom_get_mcn,
1193        .reset                  = ide_cdrom_reset,
1194        .audio_ioctl            = ide_cdrom_audio_ioctl,
1195        .capability             = IDE_CD_CAPABILITIES,
1196        .generic_packet         = ide_cdrom_packet,
1197};
1198
1199static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1200{
1201        struct cdrom_info *info = drive->driver_data;
1202        struct cdrom_device_info *devinfo = &info->devinfo;
1203
1204        ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1205
1206        devinfo->ops = &ide_cdrom_dops;
1207        devinfo->speed = info->current_speed;
1208        devinfo->capacity = nslots;
1209        devinfo->handle = drive;
1210        strcpy(devinfo->name, drive->name);
1211
1212        if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1213                devinfo->mask |= CDC_SELECT_SPEED;
1214
1215        devinfo->disk = info->disk;
1216        return register_cdrom(devinfo);
1217}
1218
1219static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1220{
1221        struct cdrom_info *cd = drive->driver_data;
1222        struct cdrom_device_info *cdi = &cd->devinfo;
1223        u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1224        mechtype_t mechtype;
1225        int nslots = 1;
1226
1227        ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1228                                     drive->media, drive->atapi_flags);
1229
1230        cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1231                     CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1232                     CDC_MO_DRIVE | CDC_RAM);
1233
1234        if (drive->media == ide_optical) {
1235                cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1236                printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1237                                drive->name);
1238                return nslots;
1239        }
1240
1241        if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1242                drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1243                cdi->mask &= ~CDC_PLAY_AUDIO;
1244                return nslots;
1245        }
1246
1247        /*
1248         * We have to cheat a little here. the packet will eventually be queued
1249         * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1250         * Since this device hasn't been registered with the Uniform layer yet,
1251         * it can't do this. Same goes for cdi->ops.
1252         */
1253        cdi->handle = drive;
1254        cdi->ops = &ide_cdrom_dops;
1255
1256        if (ide_cdrom_get_capabilities(drive, buf))
1257                return 0;
1258
1259        if ((buf[8 + 6] & 0x01) == 0)
1260                drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1261        if (buf[8 + 6] & 0x08)
1262                drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1263        if (buf[8 + 3] & 0x01)
1264                cdi->mask &= ~CDC_CD_R;
1265        if (buf[8 + 3] & 0x02)
1266                cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1267        if (buf[8 + 2] & 0x38)
1268                cdi->mask &= ~CDC_DVD;
1269        if (buf[8 + 3] & 0x20)
1270                cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1271        if (buf[8 + 3] & 0x10)
1272                cdi->mask &= ~CDC_DVD_R;
1273        if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1274                cdi->mask &= ~CDC_PLAY_AUDIO;
1275
1276        mechtype = buf[8 + 6] >> 5;
1277        if (mechtype == mechtype_caddy ||
1278            mechtype == mechtype_popup ||
1279            (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1280                cdi->mask |= CDC_CLOSE_TRAY;
1281
1282        if (cdi->sanyo_slot > 0) {
1283                cdi->mask &= ~CDC_SELECT_DISC;
1284                nslots = 3;
1285        } else if (mechtype == mechtype_individual_changer ||
1286                   mechtype == mechtype_cartridge_changer) {
1287                nslots = cdrom_number_of_slots(cdi);
1288                if (nslots > 1)
1289                        cdi->mask &= ~CDC_SELECT_DISC;
1290        }
1291
1292        ide_cdrom_update_speed(drive, buf);
1293
1294        printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1295
1296        /* don't print speed if the drive reported 0 */
1297        if (cd->max_speed)
1298                printk(KERN_CONT " %dX", cd->max_speed);
1299
1300        printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1301
1302        if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1303                printk(KERN_CONT " DVD%s%s",
1304                                 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1305                                 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1306
1307        if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1308                printk(KERN_CONT " CD%s%s",
1309                                 (cdi->mask & CDC_CD_R) ? "" : "-R",
1310                                 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1311
1312        if ((cdi->mask & CDC_SELECT_DISC) == 0)
1313                printk(KERN_CONT " changer w/%d slots", nslots);
1314        else
1315                printk(KERN_CONT " drive");
1316
1317        printk(KERN_CONT ", %dkB Cache\n",
1318                         be16_to_cpup((__be16 *)&buf[8 + 12]));
1319
1320        return nslots;
1321}
1322
1323/* standard prep_rq_fn that builds 10 byte cmds */
1324static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1325{
1326        int hard_sect = queue_logical_block_size(q);
1327        long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1328        unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1329        struct scsi_request *req = scsi_req(rq);
1330
1331        memset(req->cmd, 0, BLK_MAX_CDB);
1332
1333        if (rq_data_dir(rq) == READ)
1334                req->cmd[0] = GPCMD_READ_10;
1335        else
1336                req->cmd[0] = GPCMD_WRITE_10;
1337
1338        /*
1339         * fill in lba
1340         */
1341        req->cmd[2] = (block >> 24) & 0xff;
1342        req->cmd[3] = (block >> 16) & 0xff;
1343        req->cmd[4] = (block >>  8) & 0xff;
1344        req->cmd[5] = block & 0xff;
1345
1346        /*
1347         * and transfer length
1348         */
1349        req->cmd[7] = (blocks >> 8) & 0xff;
1350        req->cmd[8] = blocks & 0xff;
1351        req->cmd_len = 10;
1352        return BLKPREP_OK;
1353}
1354
1355/*
1356 * Most of the SCSI commands are supported directly by ATAPI devices.
1357 * This transform handles the few exceptions.
1358 */
1359static int ide_cdrom_prep_pc(struct request *rq)
1360{
1361        u8 *c = scsi_req(rq)->cmd;
1362
1363        /* transform 6-byte read/write commands to the 10-byte version */
1364        if (c[0] == READ_6 || c[0] == WRITE_6) {
1365                c[8] = c[4];
1366                c[5] = c[3];
1367                c[4] = c[2];
1368                c[3] = c[1] & 0x1f;
1369                c[2] = 0;
1370                c[1] &= 0xe0;
1371                c[0] += (READ_10 - READ_6);
1372                scsi_req(rq)->cmd_len = 10;
1373                return BLKPREP_OK;
1374        }
1375
1376        /*
1377         * it's silly to pretend we understand 6-byte sense commands, just
1378         * reject with ILLEGAL_REQUEST and the caller should take the
1379         * appropriate action
1380         */
1381        if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1382                rq->errors = ILLEGAL_REQUEST;
1383                return BLKPREP_KILL;
1384        }
1385
1386        return BLKPREP_OK;
1387}
1388
1389static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1390{
1391        if (!blk_rq_is_passthrough(rq))
1392                return ide_cdrom_prep_fs(q, rq);
1393        else if (blk_rq_is_scsi(rq))
1394                return ide_cdrom_prep_pc(rq);
1395
1396        return 0;
1397}
1398
1399struct cd_list_entry {
1400        const char      *id_model;
1401        const char      *id_firmware;
1402        unsigned int    cd_flags;
1403};
1404
1405#ifdef CONFIG_IDE_PROC_FS
1406static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1407{
1408        unsigned long capacity, sectors_per_frame;
1409
1410        if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1411                return 0;
1412
1413        return capacity * sectors_per_frame;
1414}
1415
1416static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1417{
1418        ide_drive_t *drive = m->private;
1419
1420        seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1421        return 0;
1422}
1423
1424static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1425{
1426        return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1427}
1428
1429static const struct file_operations idecd_capacity_proc_fops = {
1430        .owner          = THIS_MODULE,
1431        .open           = idecd_capacity_proc_open,
1432        .read           = seq_read,
1433        .llseek         = seq_lseek,
1434        .release        = single_release,
1435};
1436
1437static ide_proc_entry_t idecd_proc[] = {
1438        { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1439        {}
1440};
1441
1442static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1443{
1444        return idecd_proc;
1445}
1446
1447static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1448{
1449        return NULL;
1450}
1451#endif
1452
1453static const struct cd_list_entry ide_cd_quirks_list[] = {
1454        /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1455        { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1456        /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1457        { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1458                                             IDE_AFLAG_PRE_ATAPI12,          },
1459        /* Vertos 300, some versions of this drive like to talk BCD. */
1460        { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1461        /* Vertos 600 ESD. */
1462        { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1463        /*
1464         * Sanyo 3 CD changer uses a non-standard command for CD changing
1465         * (by default standard ATAPI support for CD changers is used).
1466         */
1467        { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1468        { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1469        { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1470        /* Stingray 8X CD-ROM. */
1471        { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1472        /*
1473         * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1474         * mode sense page capabilities size, but older drives break.
1475         */
1476        { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1477        { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1478        /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1479        { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1480        /*
1481         * Some drives used by Apple don't advertise audio play
1482         * but they do support reading TOC & audio datas.
1483         */
1484        { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1485        { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1486        { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1487        { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1488        { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1489        { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1490        { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1491        { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1492        { NULL, NULL, 0 }
1493};
1494
1495static unsigned int ide_cd_flags(u16 *id)
1496{
1497        const struct cd_list_entry *cle = ide_cd_quirks_list;
1498
1499        while (cle->id_model) {
1500                if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1501                    (cle->id_firmware == NULL ||
1502                     strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1503                        return cle->cd_flags;
1504                cle++;
1505        }
1506
1507        return 0;
1508}
1509
1510static int ide_cdrom_setup(ide_drive_t *drive)
1511{
1512        struct cdrom_info *cd = drive->driver_data;
1513        struct cdrom_device_info *cdi = &cd->devinfo;
1514        struct request_queue *q = drive->queue;
1515        u16 *id = drive->id;
1516        char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1517        int nslots;
1518
1519        ide_debug_log(IDE_DBG_PROBE, "enter");
1520
1521        blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1522        blk_queue_dma_alignment(q, 31);
1523        blk_queue_update_dma_pad(q, 15);
1524
1525        drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1526        drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1527
1528        if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1529            fw_rev[4] == '1' && fw_rev[6] <= '2')
1530                drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1531                                     IDE_AFLAG_TOCADDR_AS_BCD);
1532        else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1533                 fw_rev[4] == '1' && fw_rev[6] <= '2')
1534                drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1535        else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1536                /* 3 => use CD in slot 0 */
1537                cdi->sanyo_slot = 3;
1538
1539        nslots = ide_cdrom_probe_capabilities(drive);
1540
1541        blk_queue_logical_block_size(q, CD_FRAMESIZE);
1542
1543        if (ide_cdrom_register(drive, nslots)) {
1544                printk(KERN_ERR PFX "%s: %s failed to register device with the"
1545                                " cdrom driver.\n", drive->name, __func__);
1546                cd->devinfo.handle = NULL;
1547                return 1;
1548        }
1549
1550        ide_proc_register_driver(drive, cd->driver);
1551        return 0;
1552}
1553
1554static void ide_cd_remove(ide_drive_t *drive)
1555{
1556        struct cdrom_info *info = drive->driver_data;
1557
1558        ide_debug_log(IDE_DBG_FUNC, "enter");
1559
1560        ide_proc_unregister_driver(drive, info->driver);
1561        device_del(&info->dev);
1562        del_gendisk(info->disk);
1563
1564        mutex_lock(&idecd_ref_mutex);
1565        put_device(&info->dev);
1566        mutex_unlock(&idecd_ref_mutex);
1567}
1568
1569static void ide_cd_release(struct device *dev)
1570{
1571        struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1572        struct cdrom_device_info *devinfo = &info->devinfo;
1573        ide_drive_t *drive = info->drive;
1574        struct gendisk *g = info->disk;
1575
1576        ide_debug_log(IDE_DBG_FUNC, "enter");
1577
1578        kfree(info->toc);
1579        if (devinfo->handle == drive)
1580                unregister_cdrom(devinfo);
1581        drive->driver_data = NULL;
1582        blk_queue_prep_rq(drive->queue, NULL);
1583        g->private_data = NULL;
1584        put_disk(g);
1585        kfree(info);
1586}
1587
1588static int ide_cd_probe(ide_drive_t *);
1589
1590static struct ide_driver ide_cdrom_driver = {
1591        .gen_driver = {
1592                .owner          = THIS_MODULE,
1593                .name           = "ide-cdrom",
1594                .bus            = &ide_bus_type,
1595        },
1596        .probe                  = ide_cd_probe,
1597        .remove                 = ide_cd_remove,
1598        .version                = IDECD_VERSION,
1599        .do_request             = ide_cd_do_request,
1600#ifdef CONFIG_IDE_PROC_FS
1601        .proc_entries           = ide_cd_proc_entries,
1602        .proc_devsets           = ide_cd_proc_devsets,
1603#endif
1604};
1605
1606static int idecd_open(struct block_device *bdev, fmode_t mode)
1607{
1608        struct cdrom_info *info;
1609        int rc = -ENXIO;
1610
1611        mutex_lock(&ide_cd_mutex);
1612        info = ide_cd_get(bdev->bd_disk);
1613        if (!info)
1614                goto out;
1615
1616        rc = cdrom_open(&info->devinfo, bdev, mode);
1617        if (rc < 0)
1618                ide_cd_put(info);
1619out:
1620        mutex_unlock(&ide_cd_mutex);
1621        return rc;
1622}
1623
1624static void idecd_release(struct gendisk *disk, fmode_t mode)
1625{
1626        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1627
1628        mutex_lock(&ide_cd_mutex);
1629        cdrom_release(&info->devinfo, mode);
1630
1631        ide_cd_put(info);
1632        mutex_unlock(&ide_cd_mutex);
1633}
1634
1635static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1636{
1637        struct packet_command cgc;
1638        char buffer[16];
1639        int stat;
1640        char spindown;
1641
1642        if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1643                return -EFAULT;
1644
1645        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1646
1647        stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1648        if (stat)
1649                return stat;
1650
1651        buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1652        return cdrom_mode_select(cdi, &cgc);
1653}
1654
1655static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1656{
1657        struct packet_command cgc;
1658        char buffer[16];
1659        int stat;
1660        char spindown;
1661
1662        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1663
1664        stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1665        if (stat)
1666                return stat;
1667
1668        spindown = buffer[11] & 0x0f;
1669        if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1670                return -EFAULT;
1671        return 0;
1672}
1673
1674static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1675                        unsigned int cmd, unsigned long arg)
1676{
1677        struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1678        int err;
1679
1680        switch (cmd) {
1681        case CDROMSETSPINDOWN:
1682                return idecd_set_spindown(&info->devinfo, arg);
1683        case CDROMGETSPINDOWN:
1684                return idecd_get_spindown(&info->devinfo, arg);
1685        default:
1686                break;
1687        }
1688
1689        err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1690        if (err == -EINVAL)
1691                err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1692
1693        return err;
1694}
1695
1696static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1697                             unsigned int cmd, unsigned long arg)
1698{
1699        int ret;
1700
1701        mutex_lock(&ide_cd_mutex);
1702        ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1703        mutex_unlock(&ide_cd_mutex);
1704
1705        return ret;
1706}
1707
1708
1709static unsigned int idecd_check_events(struct gendisk *disk,
1710                                       unsigned int clearing)
1711{
1712        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1713        return cdrom_check_events(&info->devinfo, clearing);
1714}
1715
1716static int idecd_revalidate_disk(struct gendisk *disk)
1717{
1718        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1719        struct request_sense sense;
1720
1721        ide_cd_read_toc(info->drive, &sense);
1722
1723        return  0;
1724}
1725
1726static const struct block_device_operations idecd_ops = {
1727        .owner                  = THIS_MODULE,
1728        .open                   = idecd_open,
1729        .release                = idecd_release,
1730        .ioctl                  = idecd_ioctl,
1731        .check_events           = idecd_check_events,
1732        .revalidate_disk        = idecd_revalidate_disk
1733};
1734
1735/* module options */
1736static unsigned long debug_mask;
1737module_param(debug_mask, ulong, 0644);
1738
1739MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1740
1741static int ide_cd_probe(ide_drive_t *drive)
1742{
1743        struct cdrom_info *info;
1744        struct gendisk *g;
1745        struct request_sense sense;
1746
1747        ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1748                                     drive->driver_req, drive->media);
1749
1750        if (!strstr("ide-cdrom", drive->driver_req))
1751                goto failed;
1752
1753        if (drive->media != ide_cdrom && drive->media != ide_optical)
1754                goto failed;
1755
1756        drive->debug_mask = debug_mask;
1757        drive->irq_handler = cdrom_newpc_intr;
1758
1759        info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1760        if (info == NULL) {
1761                printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1762                                drive->name);
1763                goto failed;
1764        }
1765
1766        g = alloc_disk(1 << PARTN_BITS);
1767        if (!g)
1768                goto out_free_cd;
1769
1770        ide_init_disk(g, drive);
1771
1772        info->dev.parent = &drive->gendev;
1773        info->dev.release = ide_cd_release;
1774        dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1775
1776        if (device_register(&info->dev))
1777                goto out_free_disk;
1778
1779        info->drive = drive;
1780        info->driver = &ide_cdrom_driver;
1781        info->disk = g;
1782
1783        g->private_data = &info->driver;
1784
1785        drive->driver_data = info;
1786
1787        g->minors = 1;
1788        g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1789        if (ide_cdrom_setup(drive)) {
1790                put_device(&info->dev);
1791                goto failed;
1792        }
1793
1794        ide_cd_read_toc(drive, &sense);
1795        g->fops = &idecd_ops;
1796        g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1797        device_add_disk(&drive->gendev, g);
1798        return 0;
1799
1800out_free_disk:
1801        put_disk(g);
1802out_free_cd:
1803        kfree(info);
1804failed:
1805        return -ENODEV;
1806}
1807
1808static void __exit ide_cdrom_exit(void)
1809{
1810        driver_unregister(&ide_cdrom_driver.gen_driver);
1811}
1812
1813static int __init ide_cdrom_init(void)
1814{
1815        printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1816        return driver_register(&ide_cdrom_driver.gen_driver);
1817}
1818
1819MODULE_ALIAS("ide:*m-cdrom*");
1820MODULE_ALIAS("ide-cd");
1821module_init(ide_cdrom_init);
1822module_exit(ide_cdrom_exit);
1823MODULE_LICENSE("GPL");
1824