![Rainer Weikusat](/assets/img/avatar_default.png)
With 2.6.30, the error handling code in cdrom_newpc_intr was changed to deal with partial request failures by normally completing the 'good' parts of a request and only 'error' the last (and presumably, incompletely transferred) bio associated with a particular request. In order to do this, ide_complete_rq is called over ide_cd_error_cmd() to partially complete the rq. The block layer does partial completion only for requests with bio's and if the rq doesn't have one (eg 'GPCMD_READ_DISC_INFO') the request is completed as a whole and the drive->hwif->rq pointer set to NULL afterwards. When calling ide_complete_rq again to report the error, this null pointer is derefenced, resulting in a kernel crash. This fixes http://bugzilla.kernel.org/show_bug.cgi?id=13399. Signed-off-by: Rainer Weikusat <rweikusat@mssgmbh.com> Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
1764 lines
45 KiB
C
1764 lines
45 KiB
C
/*
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* ATAPI CD-ROM driver.
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*
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* Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
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* Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
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* Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
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* Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz
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*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* See Documentation/cdrom/ide-cd for usage information.
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*
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* Suggestions are welcome. Patches that work are more welcome though. ;-)
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*
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* Documentation:
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* Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
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*
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* For historical changelog please see:
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* Documentation/ide/ChangeLog.ide-cd.1994-2004
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*/
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#define DRV_NAME "ide-cd"
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#define PFX DRV_NAME ": "
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#define IDECD_VERSION "5.00"
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/cdrom.h>
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#include <linux/ide.h>
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#include <linux/completion.h>
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#include <linux/mutex.h>
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#include <linux/bcd.h>
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/* For SCSI -> ATAPI command conversion */
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#include <scsi/scsi.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <asm/byteorder.h>
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#include <linux/uaccess.h>
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#include <asm/unaligned.h>
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#include "ide-cd.h"
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static DEFINE_MUTEX(idecd_ref_mutex);
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static void ide_cd_release(struct device *);
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static struct cdrom_info *ide_cd_get(struct gendisk *disk)
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{
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struct cdrom_info *cd = NULL;
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mutex_lock(&idecd_ref_mutex);
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cd = ide_drv_g(disk, cdrom_info);
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if (cd) {
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if (ide_device_get(cd->drive))
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cd = NULL;
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else
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get_device(&cd->dev);
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}
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mutex_unlock(&idecd_ref_mutex);
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return cd;
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}
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static void ide_cd_put(struct cdrom_info *cd)
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{
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ide_drive_t *drive = cd->drive;
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mutex_lock(&idecd_ref_mutex);
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put_device(&cd->dev);
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ide_device_put(drive);
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mutex_unlock(&idecd_ref_mutex);
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}
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/*
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* Generic packet command support and error handling routines.
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*/
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/* Mark that we've seen a media change and invalidate our internal buffers. */
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static void cdrom_saw_media_change(ide_drive_t *drive)
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{
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drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
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drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
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}
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static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
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{
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struct request_sense *sense = &drive->sense_data;
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int log = 0;
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if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
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return 0;
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ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
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switch (sense->sense_key) {
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case NO_SENSE:
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case RECOVERED_ERROR:
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break;
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case NOT_READY:
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/*
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* don't care about tray state messages for e.g. capacity
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* commands or in-progress or becoming ready
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*/
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if (sense->asc == 0x3a || sense->asc == 0x04)
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break;
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log = 1;
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break;
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case ILLEGAL_REQUEST:
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/*
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* don't log START_STOP unit with LoEj set, since we cannot
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* reliably check if drive can auto-close
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*/
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if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
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break;
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log = 1;
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break;
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case UNIT_ATTENTION:
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/*
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* Make good and sure we've seen this potential media change.
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* Some drives (i.e. Creative) fail to present the correct sense
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* key in the error register.
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*/
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cdrom_saw_media_change(drive);
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break;
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default:
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log = 1;
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break;
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}
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return log;
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}
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static void cdrom_analyze_sense_data(ide_drive_t *drive,
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struct request *failed_command)
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{
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struct request_sense *sense = &drive->sense_data;
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struct cdrom_info *info = drive->driver_data;
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unsigned long sector;
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unsigned long bio_sectors;
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ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
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sense->error_code, sense->sense_key);
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if (failed_command)
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ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
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failed_command->cmd[0]);
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if (!cdrom_log_sense(drive, failed_command))
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return;
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/*
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* If a read toc is executed for a CD-R or CD-RW medium where the first
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* toc has not been recorded yet, it will fail with 05/24/00 (which is a
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* confusing error)
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*/
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if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
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if (sense->sense_key == 0x05 && sense->asc == 0x24)
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return;
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/* current error */
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if (sense->error_code == 0x70) {
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switch (sense->sense_key) {
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case MEDIUM_ERROR:
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case VOLUME_OVERFLOW:
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case ILLEGAL_REQUEST:
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if (!sense->valid)
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break;
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if (failed_command == NULL ||
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!blk_fs_request(failed_command))
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break;
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sector = (sense->information[0] << 24) |
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(sense->information[1] << 16) |
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(sense->information[2] << 8) |
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(sense->information[3]);
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if (queue_logical_block_size(drive->queue) == 2048)
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/* device sector size is 2K */
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sector <<= 2;
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bio_sectors = max(bio_sectors(failed_command->bio), 4U);
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sector &= ~(bio_sectors - 1);
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/*
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* The SCSI specification allows for the value
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* returned by READ CAPACITY to be up to 75 2K
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* sectors past the last readable block.
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* Therefore, if we hit a medium error within the
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* last 75 2K sectors, we decrease the saved size
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* value.
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*/
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if (sector < get_capacity(info->disk) &&
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drive->probed_capacity - sector < 4 * 75)
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set_capacity(info->disk, sector);
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}
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}
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ide_cd_log_error(drive->name, failed_command, sense);
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}
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static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
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{
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/*
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* For REQ_TYPE_SENSE, "rq->special" points to the original
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* failed request. Also, the sense data should be read
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* directly from rq which might be different from the original
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* sense buffer if it got copied during mapping.
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*/
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struct request *failed = (struct request *)rq->special;
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void *sense = bio_data(rq->bio);
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if (failed) {
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if (failed->sense) {
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/*
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* Sense is always read into drive->sense_data.
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* Copy back if the failed request has its
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* sense pointer set.
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*/
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memcpy(failed->sense, sense, 18);
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failed->sense_len = rq->sense_len;
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}
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cdrom_analyze_sense_data(drive, failed);
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if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
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BUG();
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} else
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cdrom_analyze_sense_data(drive, NULL);
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}
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/*
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* Allow the drive 5 seconds to recover; some devices will return NOT_READY
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* while flushing data from cache.
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*
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* returns: 0 failed (write timeout expired)
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* 1 success
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*/
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static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
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{
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struct cdrom_info *info = drive->driver_data;
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if (!rq->errors)
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info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
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rq->errors = 1;
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if (time_after(jiffies, info->write_timeout))
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return 0;
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else {
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struct request_queue *q = drive->queue;
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unsigned long flags;
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/*
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* take a breather relying on the unplug timer to kick us again
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*/
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spin_lock_irqsave(q->queue_lock, flags);
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blk_plug_device(q);
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spin_unlock_irqrestore(q->queue_lock, flags);
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return 1;
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}
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}
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/**
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* Returns:
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* 0: if the request should be continued.
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* 1: if the request will be going through error recovery.
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* 2: if the request should be ended.
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*/
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static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct request *rq = hwif->rq;
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int err, sense_key, do_end_request = 0;
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/* get the IDE error register */
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err = ide_read_error(drive);
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sense_key = err >> 4;
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ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
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"stat 0x%x",
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rq->cmd[0], rq->cmd_type, err, stat);
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if (blk_sense_request(rq)) {
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/*
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* We got an error trying to get sense info from the drive
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* (probably while trying to recover from a former error).
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* Just give up.
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*/
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rq->cmd_flags |= REQ_FAILED;
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return 2;
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}
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/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
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if (blk_pc_request(rq) && !rq->errors)
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rq->errors = SAM_STAT_CHECK_CONDITION;
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if (blk_noretry_request(rq))
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do_end_request = 1;
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switch (sense_key) {
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case NOT_READY:
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if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
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if (ide_cd_breathe(drive, rq))
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return 1;
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} else {
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cdrom_saw_media_change(drive);
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if (blk_fs_request(rq) && !blk_rq_quiet(rq))
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printk(KERN_ERR PFX "%s: tray open\n",
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drive->name);
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}
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do_end_request = 1;
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break;
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case UNIT_ATTENTION:
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cdrom_saw_media_change(drive);
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if (blk_fs_request(rq) == 0)
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return 0;
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/*
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* Arrange to retry the request but be sure to give up if we've
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* retried too many times.
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*/
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if (++rq->errors > ERROR_MAX)
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do_end_request = 1;
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break;
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case ILLEGAL_REQUEST:
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/*
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* Don't print error message for this condition -- SFF8090i
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* indicates that 5/24/00 is the correct response to a request
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* to close the tray if the drive doesn't have that capability.
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*
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* cdrom_log_sense() knows this!
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*/
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if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
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break;
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/* fall-through */
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case DATA_PROTECT:
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/*
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* No point in retrying after an illegal request or data
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* protect error.
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*/
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if (!blk_rq_quiet(rq))
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ide_dump_status(drive, "command error", stat);
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do_end_request = 1;
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break;
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case MEDIUM_ERROR:
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/*
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* No point in re-trying a zillion times on a bad sector.
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* If we got here the error is not correctable.
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*/
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if (!blk_rq_quiet(rq))
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ide_dump_status(drive, "media error "
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"(bad sector)", stat);
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do_end_request = 1;
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break;
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case BLANK_CHECK:
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/* disk appears blank? */
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if (!blk_rq_quiet(rq))
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ide_dump_status(drive, "media error (blank)",
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stat);
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do_end_request = 1;
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break;
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default:
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if (blk_fs_request(rq) == 0)
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break;
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if (err & ~ATA_ABORTED) {
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/* go to the default handler for other errors */
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ide_error(drive, "cdrom_decode_status", stat);
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return 1;
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} else if (++rq->errors > ERROR_MAX)
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/* we've racked up too many retries, abort */
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do_end_request = 1;
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}
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if (blk_fs_request(rq) == 0) {
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rq->cmd_flags |= REQ_FAILED;
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do_end_request = 1;
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}
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/*
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* End a request through request sense analysis when we have sense data.
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* We need this in order to perform end of media processing.
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*/
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if (do_end_request)
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goto end_request;
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/* if we got a CHECK_CONDITION status, queue a request sense command */
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if (stat & ATA_ERR)
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return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
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return 1;
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end_request:
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if (stat & ATA_ERR) {
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hwif->rq = NULL;
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return ide_queue_sense_rq(drive, rq) ? 2 : 1;
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} else
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return 2;
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}
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static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
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{
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struct request *rq = cmd->rq;
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ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
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/*
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* Some of the trailing request sense fields are optional,
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* and some drives don't send them. Sigh.
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*/
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if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
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cmd->nleft > 0 && cmd->nleft <= 5)
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cmd->nleft = 0;
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}
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int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
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int write, void *buffer, unsigned *bufflen,
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struct request_sense *sense, int timeout,
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unsigned int cmd_flags)
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{
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struct cdrom_info *info = drive->driver_data;
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struct request_sense local_sense;
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int retries = 10;
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unsigned int flags = 0;
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if (!sense)
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sense = &local_sense;
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ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
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"cmd_flags: 0x%x",
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cmd[0], write, timeout, cmd_flags);
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/* start of retry loop */
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do {
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struct request *rq;
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int error;
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rq = blk_get_request(drive->queue, write, __GFP_WAIT);
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memcpy(rq->cmd, cmd, BLK_MAX_CDB);
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rq->cmd_type = REQ_TYPE_ATA_PC;
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rq->sense = sense;
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rq->cmd_flags |= cmd_flags;
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rq->timeout = timeout;
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if (buffer) {
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error = blk_rq_map_kern(drive->queue, rq, buffer,
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*bufflen, GFP_NOIO);
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if (error) {
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blk_put_request(rq);
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return error;
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}
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}
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error = blk_execute_rq(drive->queue, info->disk, rq, 0);
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if (buffer)
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*bufflen = rq->resid_len;
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flags = rq->cmd_flags;
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blk_put_request(rq);
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/*
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* FIXME: we should probably abort/retry or something in case of
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* failure.
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*/
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if (flags & REQ_FAILED) {
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/*
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* The request failed. Retry if it was due to a unit
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* attention status (usually means media was changed).
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*/
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struct request_sense *reqbuf = sense;
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if (reqbuf->sense_key == UNIT_ATTENTION)
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cdrom_saw_media_change(drive);
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else if (reqbuf->sense_key == NOT_READY &&
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reqbuf->asc == 4 && reqbuf->ascq != 4) {
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/*
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* The drive is in the process of loading
|
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* a disk. Retry, but wait a little to give
|
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* the drive time to complete the load.
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*/
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ssleep(2);
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} else {
|
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/* otherwise, don't retry */
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retries = 0;
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}
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--retries;
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}
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|
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/* end of retry loop */
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} while ((flags & REQ_FAILED) && retries >= 0);
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|
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/* return an error if the command failed */
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return (flags & REQ_FAILED) ? -EIO : 0;
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}
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|
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static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
|
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{
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unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
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|
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if (cmd->tf_flags & IDE_TFLAG_WRITE)
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nr_bytes -= cmd->last_xfer_len;
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|
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if (nr_bytes > 0)
|
|
ide_complete_rq(drive, 0, nr_bytes);
|
|
}
|
|
|
|
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct ide_cmd *cmd = &hwif->cmd;
|
|
struct request *rq = hwif->rq;
|
|
ide_expiry_t *expiry = NULL;
|
|
int dma_error = 0, dma, thislen, uptodate = 0;
|
|
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
|
|
int sense = blk_sense_request(rq);
|
|
unsigned int timeout;
|
|
u16 len;
|
|
u8 ireason, stat;
|
|
|
|
ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
|
|
|
|
/* check for errors */
|
|
dma = drive->dma;
|
|
if (dma) {
|
|
drive->dma = 0;
|
|
drive->waiting_for_dma = 0;
|
|
dma_error = hwif->dma_ops->dma_end(drive);
|
|
ide_dma_unmap_sg(drive, cmd);
|
|
if (dma_error) {
|
|
printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
|
|
write ? "write" : "read");
|
|
ide_dma_off(drive);
|
|
}
|
|
}
|
|
|
|
/* check status */
|
|
stat = hwif->tp_ops->read_status(hwif);
|
|
|
|
if (!OK_STAT(stat, 0, BAD_R_STAT)) {
|
|
rc = cdrom_decode_status(drive, stat);
|
|
if (rc) {
|
|
if (rc == 2)
|
|
goto out_end;
|
|
return ide_stopped;
|
|
}
|
|
}
|
|
|
|
/* using dma, transfer is complete now */
|
|
if (dma) {
|
|
if (dma_error)
|
|
return ide_error(drive, "dma error", stat);
|
|
uptodate = 1;
|
|
goto out_end;
|
|
}
|
|
|
|
ide_read_bcount_and_ireason(drive, &len, &ireason);
|
|
|
|
thislen = blk_fs_request(rq) ? len : cmd->nleft;
|
|
if (thislen > len)
|
|
thislen = len;
|
|
|
|
ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
|
|
stat, thislen);
|
|
|
|
/* If DRQ is clear, the command has completed. */
|
|
if ((stat & ATA_DRQ) == 0) {
|
|
if (blk_fs_request(rq)) {
|
|
/*
|
|
* If we're not done reading/writing, complain.
|
|
* Otherwise, complete the command normally.
|
|
*/
|
|
uptodate = 1;
|
|
if (cmd->nleft > 0) {
|
|
printk(KERN_ERR PFX "%s: %s: data underrun "
|
|
"(%u bytes)\n", drive->name, __func__,
|
|
cmd->nleft);
|
|
if (!write)
|
|
rq->cmd_flags |= REQ_FAILED;
|
|
uptodate = 0;
|
|
}
|
|
} else if (!blk_pc_request(rq)) {
|
|
ide_cd_request_sense_fixup(drive, cmd);
|
|
/* complain if we still have data left to transfer */
|
|
uptodate = cmd->nleft ? 0 : 1;
|
|
if (uptodate == 0)
|
|
rq->cmd_flags |= REQ_FAILED;
|
|
}
|
|
goto out_end;
|
|
}
|
|
|
|
rc = ide_check_ireason(drive, rq, len, ireason, write);
|
|
if (rc)
|
|
goto out_end;
|
|
|
|
cmd->last_xfer_len = 0;
|
|
|
|
ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
|
|
"ireason: 0x%x",
|
|
rq->cmd_type, ireason);
|
|
|
|
/* transfer data */
|
|
while (thislen > 0) {
|
|
int blen = min_t(int, thislen, cmd->nleft);
|
|
|
|
if (cmd->nleft == 0)
|
|
break;
|
|
|
|
ide_pio_bytes(drive, cmd, write, blen);
|
|
cmd->last_xfer_len += blen;
|
|
|
|
thislen -= blen;
|
|
len -= blen;
|
|
|
|
if (sense && write == 0)
|
|
rq->sense_len += blen;
|
|
}
|
|
|
|
/* pad, if necessary */
|
|
if (len > 0) {
|
|
if (blk_fs_request(rq) == 0 || write == 0)
|
|
ide_pad_transfer(drive, write, len);
|
|
else {
|
|
printk(KERN_ERR PFX "%s: confused, missing data\n",
|
|
drive->name);
|
|
blk_dump_rq_flags(rq, "cdrom_newpc_intr");
|
|
}
|
|
}
|
|
|
|
if (blk_pc_request(rq)) {
|
|
timeout = rq->timeout;
|
|
} else {
|
|
timeout = ATAPI_WAIT_PC;
|
|
if (!blk_fs_request(rq))
|
|
expiry = ide_cd_expiry;
|
|
}
|
|
|
|
hwif->expiry = expiry;
|
|
ide_set_handler(drive, cdrom_newpc_intr, timeout);
|
|
return ide_started;
|
|
|
|
out_end:
|
|
if (blk_pc_request(rq) && rc == 0) {
|
|
rq->resid_len = 0;
|
|
blk_end_request_all(rq, 0);
|
|
hwif->rq = NULL;
|
|
} else {
|
|
if (sense && uptodate)
|
|
ide_cd_complete_failed_rq(drive, rq);
|
|
|
|
if (blk_fs_request(rq)) {
|
|
if (cmd->nleft == 0)
|
|
uptodate = 1;
|
|
} else {
|
|
if (uptodate <= 0 && rq->errors == 0)
|
|
rq->errors = -EIO;
|
|
}
|
|
|
|
if (uptodate == 0 && rq->bio)
|
|
ide_cd_error_cmd(drive, cmd);
|
|
|
|
/* make sure it's fully ended */
|
|
if (blk_fs_request(rq) == 0) {
|
|
rq->resid_len -= cmd->nbytes - cmd->nleft;
|
|
if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
|
|
rq->resid_len += cmd->last_xfer_len;
|
|
}
|
|
|
|
ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
|
|
|
|
if (sense && rc == 2)
|
|
ide_error(drive, "request sense failure", stat);
|
|
}
|
|
return ide_stopped;
|
|
}
|
|
|
|
static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
|
|
{
|
|
struct cdrom_info *cd = drive->driver_data;
|
|
struct request_queue *q = drive->queue;
|
|
int write = rq_data_dir(rq) == WRITE;
|
|
unsigned short sectors_per_frame =
|
|
queue_logical_block_size(q) >> SECTOR_BITS;
|
|
|
|
ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
|
|
"secs_per_frame: %u",
|
|
rq->cmd[0], rq->cmd_flags, sectors_per_frame);
|
|
|
|
if (write) {
|
|
/* disk has become write protected */
|
|
if (get_disk_ro(cd->disk))
|
|
return ide_stopped;
|
|
} else {
|
|
/*
|
|
* We may be retrying this request after an error. Fix up any
|
|
* weirdness which might be present in the request packet.
|
|
*/
|
|
q->prep_rq_fn(q, rq);
|
|
}
|
|
|
|
/* fs requests *must* be hardware frame aligned */
|
|
if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
|
|
(blk_rq_pos(rq) & (sectors_per_frame - 1)))
|
|
return ide_stopped;
|
|
|
|
/* use DMA, if possible */
|
|
drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
|
|
|
|
if (write)
|
|
cd->devinfo.media_written = 1;
|
|
|
|
rq->timeout = ATAPI_WAIT_PC;
|
|
|
|
return ide_started;
|
|
}
|
|
|
|
static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
|
|
{
|
|
|
|
ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
|
|
rq->cmd[0], rq->cmd_type);
|
|
|
|
if (blk_pc_request(rq))
|
|
rq->cmd_flags |= REQ_QUIET;
|
|
else
|
|
rq->cmd_flags &= ~REQ_FAILED;
|
|
|
|
drive->dma = 0;
|
|
|
|
/* sg request */
|
|
if (rq->bio) {
|
|
struct request_queue *q = drive->queue;
|
|
char *buf = bio_data(rq->bio);
|
|
unsigned int alignment;
|
|
|
|
drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
|
|
|
|
/*
|
|
* check if dma is safe
|
|
*
|
|
* NOTE! The "len" and "addr" checks should possibly have
|
|
* separate masks.
|
|
*/
|
|
alignment = queue_dma_alignment(q) | q->dma_pad_mask;
|
|
if ((unsigned long)buf & alignment
|
|
|| blk_rq_bytes(rq) & q->dma_pad_mask
|
|
|| object_is_on_stack(buf))
|
|
drive->dma = 0;
|
|
}
|
|
}
|
|
|
|
static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
|
|
sector_t block)
|
|
{
|
|
struct ide_cmd cmd;
|
|
int uptodate = 0, nsectors;
|
|
|
|
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
|
|
rq->cmd[0], (unsigned long long)block);
|
|
|
|
if (drive->debug_mask & IDE_DBG_RQ)
|
|
blk_dump_rq_flags(rq, "ide_cd_do_request");
|
|
|
|
if (blk_fs_request(rq)) {
|
|
if (cdrom_start_rw(drive, rq) == ide_stopped)
|
|
goto out_end;
|
|
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
|
|
rq->cmd_type == REQ_TYPE_ATA_PC) {
|
|
if (!rq->timeout)
|
|
rq->timeout = ATAPI_WAIT_PC;
|
|
|
|
cdrom_do_block_pc(drive, rq);
|
|
} else if (blk_special_request(rq)) {
|
|
/* right now this can only be a reset... */
|
|
uptodate = 1;
|
|
goto out_end;
|
|
} else
|
|
BUG();
|
|
|
|
/* prepare sense request for this command */
|
|
ide_prep_sense(drive, rq);
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
if (rq_data_dir(rq))
|
|
cmd.tf_flags |= IDE_TFLAG_WRITE;
|
|
|
|
cmd.rq = rq;
|
|
|
|
if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
|
|
ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
|
|
ide_map_sg(drive, &cmd);
|
|
}
|
|
|
|
return ide_issue_pc(drive, &cmd);
|
|
out_end:
|
|
nsectors = blk_rq_sectors(rq);
|
|
|
|
if (nsectors == 0)
|
|
nsectors = 1;
|
|
|
|
ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
|
|
|
|
return ide_stopped;
|
|
}
|
|
|
|
/*
|
|
* Ioctl handling.
|
|
*
|
|
* Routines which queue packet commands take as a final argument a pointer to a
|
|
* request_sense struct. If execution of the command results in an error with a
|
|
* CHECK CONDITION status, this structure will be filled with the results of the
|
|
* subsequent request sense command. The pointer can also be NULL, in which case
|
|
* no sense information is returned.
|
|
*/
|
|
static void msf_from_bcd(struct atapi_msf *msf)
|
|
{
|
|
msf->minute = bcd2bin(msf->minute);
|
|
msf->second = bcd2bin(msf->second);
|
|
msf->frame = bcd2bin(msf->frame);
|
|
}
|
|
|
|
int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
|
|
{
|
|
struct cdrom_info *info = drive->driver_data;
|
|
struct cdrom_device_info *cdi = &info->devinfo;
|
|
unsigned char cmd[BLK_MAX_CDB];
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
memset(cmd, 0, BLK_MAX_CDB);
|
|
cmd[0] = GPCMD_TEST_UNIT_READY;
|
|
|
|
/*
|
|
* Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
|
|
* instead of supporting the LOAD_UNLOAD opcode.
|
|
*/
|
|
cmd[7] = cdi->sanyo_slot % 3;
|
|
|
|
return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
|
|
}
|
|
|
|
static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
|
|
unsigned long *sectors_per_frame,
|
|
struct request_sense *sense)
|
|
{
|
|
struct {
|
|
__be32 lba;
|
|
__be32 blocklen;
|
|
} capbuf;
|
|
|
|
int stat;
|
|
unsigned char cmd[BLK_MAX_CDB];
|
|
unsigned len = sizeof(capbuf);
|
|
u32 blocklen;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
memset(cmd, 0, BLK_MAX_CDB);
|
|
cmd[0] = GPCMD_READ_CDVD_CAPACITY;
|
|
|
|
stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
|
|
REQ_QUIET);
|
|
if (stat)
|
|
return stat;
|
|
|
|
/*
|
|
* Sanity check the given block size
|
|
*/
|
|
blocklen = be32_to_cpu(capbuf.blocklen);
|
|
switch (blocklen) {
|
|
case 512:
|
|
case 1024:
|
|
case 2048:
|
|
case 4096:
|
|
break;
|
|
default:
|
|
printk(KERN_ERR PFX "%s: weird block size %u\n",
|
|
drive->name, blocklen);
|
|
printk(KERN_ERR PFX "%s: default to 2kb block size\n",
|
|
drive->name);
|
|
blocklen = 2048;
|
|
break;
|
|
}
|
|
|
|
*capacity = 1 + be32_to_cpu(capbuf.lba);
|
|
*sectors_per_frame = blocklen >> SECTOR_BITS;
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
|
|
*capacity, *sectors_per_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
|
|
int format, char *buf, int buflen,
|
|
struct request_sense *sense)
|
|
{
|
|
unsigned char cmd[BLK_MAX_CDB];
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
memset(cmd, 0, BLK_MAX_CDB);
|
|
|
|
cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
|
|
cmd[6] = trackno;
|
|
cmd[7] = (buflen >> 8);
|
|
cmd[8] = (buflen & 0xff);
|
|
cmd[9] = (format << 6);
|
|
|
|
if (msf_flag)
|
|
cmd[1] = 2;
|
|
|
|
return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
|
|
}
|
|
|
|
/* Try to read the entire TOC for the disk into our internal buffer. */
|
|
int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
|
|
{
|
|
int stat, ntracks, i;
|
|
struct cdrom_info *info = drive->driver_data;
|
|
struct cdrom_device_info *cdi = &info->devinfo;
|
|
struct atapi_toc *toc = info->toc;
|
|
struct {
|
|
struct atapi_toc_header hdr;
|
|
struct atapi_toc_entry ent;
|
|
} ms_tmp;
|
|
long last_written;
|
|
unsigned long sectors_per_frame = SECTORS_PER_FRAME;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
if (toc == NULL) {
|
|
/* try to allocate space */
|
|
toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
|
|
if (toc == NULL) {
|
|
printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
|
|
drive->name);
|
|
return -ENOMEM;
|
|
}
|
|
info->toc = toc;
|
|
}
|
|
|
|
/*
|
|
* Check to see if the existing data is still valid. If it is,
|
|
* just return.
|
|
*/
|
|
(void) cdrom_check_status(drive, sense);
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
|
|
return 0;
|
|
|
|
/* try to get the total cdrom capacity and sector size */
|
|
stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
|
|
sense);
|
|
if (stat)
|
|
toc->capacity = 0x1fffff;
|
|
|
|
set_capacity(info->disk, toc->capacity * sectors_per_frame);
|
|
/* save a private copy of the TOC capacity for error handling */
|
|
drive->probed_capacity = toc->capacity * sectors_per_frame;
|
|
|
|
blk_queue_logical_block_size(drive->queue,
|
|
sectors_per_frame << SECTOR_BITS);
|
|
|
|
/* first read just the header, so we know how long the TOC is */
|
|
stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
|
|
sizeof(struct atapi_toc_header), sense);
|
|
if (stat)
|
|
return stat;
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
|
|
toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
|
|
toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
|
|
}
|
|
|
|
ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
|
|
if (ntracks <= 0)
|
|
return -EIO;
|
|
if (ntracks > MAX_TRACKS)
|
|
ntracks = MAX_TRACKS;
|
|
|
|
/* now read the whole schmeer */
|
|
stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
|
|
(char *)&toc->hdr,
|
|
sizeof(struct atapi_toc_header) +
|
|
(ntracks + 1) *
|
|
sizeof(struct atapi_toc_entry), sense);
|
|
|
|
if (stat && toc->hdr.first_track > 1) {
|
|
/*
|
|
* Cds with CDI tracks only don't have any TOC entries, despite
|
|
* of this the returned values are
|
|
* first_track == last_track = number of CDI tracks + 1,
|
|
* so that this case is indistinguishable from the same layout
|
|
* plus an additional audio track. If we get an error for the
|
|
* regular case, we assume a CDI without additional audio
|
|
* tracks. In this case the readable TOC is empty (CDI tracks
|
|
* are not included) and only holds the Leadout entry.
|
|
*
|
|
* Heiko Eißfeldt.
|
|
*/
|
|
ntracks = 0;
|
|
stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
|
|
(char *)&toc->hdr,
|
|
sizeof(struct atapi_toc_header) +
|
|
(ntracks + 1) *
|
|
sizeof(struct atapi_toc_entry),
|
|
sense);
|
|
if (stat)
|
|
return stat;
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
|
|
toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
|
|
toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
|
|
} else {
|
|
toc->hdr.first_track = CDROM_LEADOUT;
|
|
toc->hdr.last_track = CDROM_LEADOUT;
|
|
}
|
|
}
|
|
|
|
if (stat)
|
|
return stat;
|
|
|
|
toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
|
|
toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
|
|
toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
|
|
}
|
|
|
|
for (i = 0; i <= ntracks; i++) {
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
|
|
toc->ent[i].track = bcd2bin(toc->ent[i].track);
|
|
msf_from_bcd(&toc->ent[i].addr.msf);
|
|
}
|
|
toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
|
|
toc->ent[i].addr.msf.second,
|
|
toc->ent[i].addr.msf.frame);
|
|
}
|
|
|
|
if (toc->hdr.first_track != CDROM_LEADOUT) {
|
|
/* read the multisession information */
|
|
stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
|
|
sizeof(ms_tmp), sense);
|
|
if (stat)
|
|
return stat;
|
|
|
|
toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
|
|
} else {
|
|
ms_tmp.hdr.last_track = CDROM_LEADOUT;
|
|
ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
|
|
toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
|
|
}
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
|
|
/* re-read multisession information using MSF format */
|
|
stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
|
|
sizeof(ms_tmp), sense);
|
|
if (stat)
|
|
return stat;
|
|
|
|
msf_from_bcd(&ms_tmp.ent.addr.msf);
|
|
toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
|
|
ms_tmp.ent.addr.msf.second,
|
|
ms_tmp.ent.addr.msf.frame);
|
|
}
|
|
|
|
toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
|
|
|
|
/* now try to get the total cdrom capacity */
|
|
stat = cdrom_get_last_written(cdi, &last_written);
|
|
if (!stat && (last_written > toc->capacity)) {
|
|
toc->capacity = last_written;
|
|
set_capacity(info->disk, toc->capacity * sectors_per_frame);
|
|
drive->probed_capacity = toc->capacity * sectors_per_frame;
|
|
}
|
|
|
|
/* Remember that we've read this stuff. */
|
|
drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
|
|
{
|
|
struct cdrom_info *info = drive->driver_data;
|
|
struct cdrom_device_info *cdi = &info->devinfo;
|
|
struct packet_command cgc;
|
|
int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
|
|
size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
|
|
|
|
init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
|
|
do {
|
|
/* we seem to get stat=0x01,err=0x00 the first time (??) */
|
|
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
|
|
if (!stat)
|
|
break;
|
|
} while (--attempts);
|
|
return stat;
|
|
}
|
|
|
|
void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
|
|
{
|
|
struct cdrom_info *cd = drive->driver_data;
|
|
u16 curspeed, maxspeed;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
|
|
curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
|
|
maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
|
|
} else {
|
|
curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
|
|
maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
|
|
}
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
|
|
curspeed, maxspeed);
|
|
|
|
cd->current_speed = (curspeed + (176/2)) / 176;
|
|
cd->max_speed = (maxspeed + (176/2)) / 176;
|
|
}
|
|
|
|
#define IDE_CD_CAPABILITIES \
|
|
(CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
|
|
CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
|
|
CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
|
|
CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
|
|
CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
|
|
|
|
static struct cdrom_device_ops ide_cdrom_dops = {
|
|
.open = ide_cdrom_open_real,
|
|
.release = ide_cdrom_release_real,
|
|
.drive_status = ide_cdrom_drive_status,
|
|
.media_changed = ide_cdrom_check_media_change_real,
|
|
.tray_move = ide_cdrom_tray_move,
|
|
.lock_door = ide_cdrom_lock_door,
|
|
.select_speed = ide_cdrom_select_speed,
|
|
.get_last_session = ide_cdrom_get_last_session,
|
|
.get_mcn = ide_cdrom_get_mcn,
|
|
.reset = ide_cdrom_reset,
|
|
.audio_ioctl = ide_cdrom_audio_ioctl,
|
|
.capability = IDE_CD_CAPABILITIES,
|
|
.generic_packet = ide_cdrom_packet,
|
|
};
|
|
|
|
static int ide_cdrom_register(ide_drive_t *drive, int nslots)
|
|
{
|
|
struct cdrom_info *info = drive->driver_data;
|
|
struct cdrom_device_info *devinfo = &info->devinfo;
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
|
|
|
|
devinfo->ops = &ide_cdrom_dops;
|
|
devinfo->speed = info->current_speed;
|
|
devinfo->capacity = nslots;
|
|
devinfo->handle = drive;
|
|
strcpy(devinfo->name, drive->name);
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
|
|
devinfo->mask |= CDC_SELECT_SPEED;
|
|
|
|
devinfo->disk = info->disk;
|
|
return register_cdrom(devinfo);
|
|
}
|
|
|
|
static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
|
|
{
|
|
struct cdrom_info *cd = drive->driver_data;
|
|
struct cdrom_device_info *cdi = &cd->devinfo;
|
|
u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
|
|
mechtype_t mechtype;
|
|
int nslots = 1;
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
|
|
drive->media, drive->atapi_flags);
|
|
|
|
cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
|
|
CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
|
|
CDC_MO_DRIVE | CDC_RAM);
|
|
|
|
if (drive->media == ide_optical) {
|
|
cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
|
|
printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
|
|
drive->name);
|
|
return nslots;
|
|
}
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
|
|
drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
|
|
cdi->mask &= ~CDC_PLAY_AUDIO;
|
|
return nslots;
|
|
}
|
|
|
|
/*
|
|
* We have to cheat a little here. the packet will eventually be queued
|
|
* with ide_cdrom_packet(), which extracts the drive from cdi->handle.
|
|
* Since this device hasn't been registered with the Uniform layer yet,
|
|
* it can't do this. Same goes for cdi->ops.
|
|
*/
|
|
cdi->handle = drive;
|
|
cdi->ops = &ide_cdrom_dops;
|
|
|
|
if (ide_cdrom_get_capabilities(drive, buf))
|
|
return 0;
|
|
|
|
if ((buf[8 + 6] & 0x01) == 0)
|
|
drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
|
|
if (buf[8 + 6] & 0x08)
|
|
drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
|
|
if (buf[8 + 3] & 0x01)
|
|
cdi->mask &= ~CDC_CD_R;
|
|
if (buf[8 + 3] & 0x02)
|
|
cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
|
|
if (buf[8 + 2] & 0x38)
|
|
cdi->mask &= ~CDC_DVD;
|
|
if (buf[8 + 3] & 0x20)
|
|
cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
|
|
if (buf[8 + 3] & 0x10)
|
|
cdi->mask &= ~CDC_DVD_R;
|
|
if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
|
|
cdi->mask &= ~CDC_PLAY_AUDIO;
|
|
|
|
mechtype = buf[8 + 6] >> 5;
|
|
if (mechtype == mechtype_caddy ||
|
|
mechtype == mechtype_popup ||
|
|
(drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
|
|
cdi->mask |= CDC_CLOSE_TRAY;
|
|
|
|
if (cdi->sanyo_slot > 0) {
|
|
cdi->mask &= ~CDC_SELECT_DISC;
|
|
nslots = 3;
|
|
} else if (mechtype == mechtype_individual_changer ||
|
|
mechtype == mechtype_cartridge_changer) {
|
|
nslots = cdrom_number_of_slots(cdi);
|
|
if (nslots > 1)
|
|
cdi->mask &= ~CDC_SELECT_DISC;
|
|
}
|
|
|
|
ide_cdrom_update_speed(drive, buf);
|
|
|
|
printk(KERN_INFO PFX "%s: ATAPI", drive->name);
|
|
|
|
/* don't print speed if the drive reported 0 */
|
|
if (cd->max_speed)
|
|
printk(KERN_CONT " %dX", cd->max_speed);
|
|
|
|
printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
|
|
|
|
if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
|
|
printk(KERN_CONT " DVD%s%s",
|
|
(cdi->mask & CDC_DVD_R) ? "" : "-R",
|
|
(cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
|
|
|
|
if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
|
|
printk(KERN_CONT " CD%s%s",
|
|
(cdi->mask & CDC_CD_R) ? "" : "-R",
|
|
(cdi->mask & CDC_CD_RW) ? "" : "/RW");
|
|
|
|
if ((cdi->mask & CDC_SELECT_DISC) == 0)
|
|
printk(KERN_CONT " changer w/%d slots", nslots);
|
|
else
|
|
printk(KERN_CONT " drive");
|
|
|
|
printk(KERN_CONT ", %dkB Cache\n",
|
|
be16_to_cpup((__be16 *)&buf[8 + 12]));
|
|
|
|
return nslots;
|
|
}
|
|
|
|
/* standard prep_rq_fn that builds 10 byte cmds */
|
|
static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
|
|
{
|
|
int hard_sect = queue_logical_block_size(q);
|
|
long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
|
|
unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
|
|
|
|
memset(rq->cmd, 0, BLK_MAX_CDB);
|
|
|
|
if (rq_data_dir(rq) == READ)
|
|
rq->cmd[0] = GPCMD_READ_10;
|
|
else
|
|
rq->cmd[0] = GPCMD_WRITE_10;
|
|
|
|
/*
|
|
* fill in lba
|
|
*/
|
|
rq->cmd[2] = (block >> 24) & 0xff;
|
|
rq->cmd[3] = (block >> 16) & 0xff;
|
|
rq->cmd[4] = (block >> 8) & 0xff;
|
|
rq->cmd[5] = block & 0xff;
|
|
|
|
/*
|
|
* and transfer length
|
|
*/
|
|
rq->cmd[7] = (blocks >> 8) & 0xff;
|
|
rq->cmd[8] = blocks & 0xff;
|
|
rq->cmd_len = 10;
|
|
return BLKPREP_OK;
|
|
}
|
|
|
|
/*
|
|
* Most of the SCSI commands are supported directly by ATAPI devices.
|
|
* This transform handles the few exceptions.
|
|
*/
|
|
static int ide_cdrom_prep_pc(struct request *rq)
|
|
{
|
|
u8 *c = rq->cmd;
|
|
|
|
/* transform 6-byte read/write commands to the 10-byte version */
|
|
if (c[0] == READ_6 || c[0] == WRITE_6) {
|
|
c[8] = c[4];
|
|
c[5] = c[3];
|
|
c[4] = c[2];
|
|
c[3] = c[1] & 0x1f;
|
|
c[2] = 0;
|
|
c[1] &= 0xe0;
|
|
c[0] += (READ_10 - READ_6);
|
|
rq->cmd_len = 10;
|
|
return BLKPREP_OK;
|
|
}
|
|
|
|
/*
|
|
* it's silly to pretend we understand 6-byte sense commands, just
|
|
* reject with ILLEGAL_REQUEST and the caller should take the
|
|
* appropriate action
|
|
*/
|
|
if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
|
|
rq->errors = ILLEGAL_REQUEST;
|
|
return BLKPREP_KILL;
|
|
}
|
|
|
|
return BLKPREP_OK;
|
|
}
|
|
|
|
static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
|
|
{
|
|
if (blk_fs_request(rq))
|
|
return ide_cdrom_prep_fs(q, rq);
|
|
else if (blk_pc_request(rq))
|
|
return ide_cdrom_prep_pc(rq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct cd_list_entry {
|
|
const char *id_model;
|
|
const char *id_firmware;
|
|
unsigned int cd_flags;
|
|
};
|
|
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
static sector_t ide_cdrom_capacity(ide_drive_t *drive)
|
|
{
|
|
unsigned long capacity, sectors_per_frame;
|
|
|
|
if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
|
|
return 0;
|
|
|
|
return capacity * sectors_per_frame;
|
|
}
|
|
|
|
static int proc_idecd_read_capacity(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
ide_drive_t *drive = data;
|
|
int len;
|
|
|
|
len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static ide_proc_entry_t idecd_proc[] = {
|
|
{ "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
|
|
static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
|
|
{
|
|
return idecd_proc;
|
|
}
|
|
|
|
static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
static const struct cd_list_entry ide_cd_quirks_list[] = {
|
|
/* SCR-3231 doesn't support the SET_CD_SPEED command. */
|
|
{ "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
|
|
/* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
|
|
{ "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
|
|
IDE_AFLAG_PRE_ATAPI12, },
|
|
/* Vertos 300, some versions of this drive like to talk BCD. */
|
|
{ "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
|
|
/* Vertos 600 ESD. */
|
|
{ "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
|
|
/*
|
|
* Sanyo 3 CD changer uses a non-standard command for CD changing
|
|
* (by default standard ATAPI support for CD changers is used).
|
|
*/
|
|
{ "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
|
|
{ "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
|
|
{ "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
|
|
/* Stingray 8X CD-ROM. */
|
|
{ "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
|
|
/*
|
|
* ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
|
|
* mode sense page capabilities size, but older drives break.
|
|
*/
|
|
{ "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
|
|
{ "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
|
|
/* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
|
|
{ "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
|
|
/*
|
|
* Some drives used by Apple don't advertise audio play
|
|
* but they do support reading TOC & audio datas.
|
|
*/
|
|
{ "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
|
|
{ "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
|
|
{ "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
|
|
static unsigned int ide_cd_flags(u16 *id)
|
|
{
|
|
const struct cd_list_entry *cle = ide_cd_quirks_list;
|
|
|
|
while (cle->id_model) {
|
|
if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
|
|
(cle->id_firmware == NULL ||
|
|
strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
|
|
return cle->cd_flags;
|
|
cle++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ide_cdrom_setup(ide_drive_t *drive)
|
|
{
|
|
struct cdrom_info *cd = drive->driver_data;
|
|
struct cdrom_device_info *cdi = &cd->devinfo;
|
|
struct request_queue *q = drive->queue;
|
|
u16 *id = drive->id;
|
|
char *fw_rev = (char *)&id[ATA_ID_FW_REV];
|
|
int nslots;
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "enter");
|
|
|
|
blk_queue_prep_rq(q, ide_cdrom_prep_fn);
|
|
blk_queue_dma_alignment(q, 31);
|
|
blk_queue_update_dma_pad(q, 15);
|
|
|
|
q->unplug_delay = max((1 * HZ) / 1000, 1);
|
|
|
|
drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
|
|
drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
|
|
|
|
if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
|
|
fw_rev[4] == '1' && fw_rev[6] <= '2')
|
|
drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
|
|
IDE_AFLAG_TOCADDR_AS_BCD);
|
|
else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
|
|
fw_rev[4] == '1' && fw_rev[6] <= '2')
|
|
drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
|
|
else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
|
|
/* 3 => use CD in slot 0 */
|
|
cdi->sanyo_slot = 3;
|
|
|
|
nslots = ide_cdrom_probe_capabilities(drive);
|
|
|
|
blk_queue_logical_block_size(q, CD_FRAMESIZE);
|
|
|
|
if (ide_cdrom_register(drive, nslots)) {
|
|
printk(KERN_ERR PFX "%s: %s failed to register device with the"
|
|
" cdrom driver.\n", drive->name, __func__);
|
|
cd->devinfo.handle = NULL;
|
|
return 1;
|
|
}
|
|
|
|
ide_proc_register_driver(drive, cd->driver);
|
|
return 0;
|
|
}
|
|
|
|
static void ide_cd_remove(ide_drive_t *drive)
|
|
{
|
|
struct cdrom_info *info = drive->driver_data;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
ide_proc_unregister_driver(drive, info->driver);
|
|
device_del(&info->dev);
|
|
del_gendisk(info->disk);
|
|
|
|
mutex_lock(&idecd_ref_mutex);
|
|
put_device(&info->dev);
|
|
mutex_unlock(&idecd_ref_mutex);
|
|
}
|
|
|
|
static void ide_cd_release(struct device *dev)
|
|
{
|
|
struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
|
|
struct cdrom_device_info *devinfo = &info->devinfo;
|
|
ide_drive_t *drive = info->drive;
|
|
struct gendisk *g = info->disk;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
kfree(info->toc);
|
|
if (devinfo->handle == drive)
|
|
unregister_cdrom(devinfo);
|
|
drive->driver_data = NULL;
|
|
blk_queue_prep_rq(drive->queue, NULL);
|
|
g->private_data = NULL;
|
|
put_disk(g);
|
|
kfree(info);
|
|
}
|
|
|
|
static int ide_cd_probe(ide_drive_t *);
|
|
|
|
static struct ide_driver ide_cdrom_driver = {
|
|
.gen_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ide-cdrom",
|
|
.bus = &ide_bus_type,
|
|
},
|
|
.probe = ide_cd_probe,
|
|
.remove = ide_cd_remove,
|
|
.version = IDECD_VERSION,
|
|
.do_request = ide_cd_do_request,
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
.proc_entries = ide_cd_proc_entries,
|
|
.proc_devsets = ide_cd_proc_devsets,
|
|
#endif
|
|
};
|
|
|
|
static int idecd_open(struct block_device *bdev, fmode_t mode)
|
|
{
|
|
struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
|
|
int rc = -ENOMEM;
|
|
|
|
if (!info)
|
|
return -ENXIO;
|
|
|
|
rc = cdrom_open(&info->devinfo, bdev, mode);
|
|
|
|
if (rc < 0)
|
|
ide_cd_put(info);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int idecd_release(struct gendisk *disk, fmode_t mode)
|
|
{
|
|
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
|
|
|
|
cdrom_release(&info->devinfo, mode);
|
|
|
|
ide_cd_put(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
|
|
{
|
|
struct packet_command cgc;
|
|
char buffer[16];
|
|
int stat;
|
|
char spindown;
|
|
|
|
if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
|
|
return -EFAULT;
|
|
|
|
init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
|
|
|
|
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
|
|
if (stat)
|
|
return stat;
|
|
|
|
buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
|
|
return cdrom_mode_select(cdi, &cgc);
|
|
}
|
|
|
|
static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
|
|
{
|
|
struct packet_command cgc;
|
|
char buffer[16];
|
|
int stat;
|
|
char spindown;
|
|
|
|
init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
|
|
|
|
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
|
|
if (stat)
|
|
return stat;
|
|
|
|
spindown = buffer[11] & 0x0f;
|
|
if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
|
|
int err;
|
|
|
|
switch (cmd) {
|
|
case CDROMSETSPINDOWN:
|
|
return idecd_set_spindown(&info->devinfo, arg);
|
|
case CDROMGETSPINDOWN:
|
|
return idecd_get_spindown(&info->devinfo, arg);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
|
|
if (err == -EINVAL)
|
|
err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int idecd_media_changed(struct gendisk *disk)
|
|
{
|
|
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
|
|
return cdrom_media_changed(&info->devinfo);
|
|
}
|
|
|
|
static int idecd_revalidate_disk(struct gendisk *disk)
|
|
{
|
|
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
|
|
struct request_sense sense;
|
|
|
|
ide_cd_read_toc(info->drive, &sense);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct block_device_operations idecd_ops = {
|
|
.owner = THIS_MODULE,
|
|
.open = idecd_open,
|
|
.release = idecd_release,
|
|
.locked_ioctl = idecd_ioctl,
|
|
.media_changed = idecd_media_changed,
|
|
.revalidate_disk = idecd_revalidate_disk
|
|
};
|
|
|
|
/* module options */
|
|
static unsigned long debug_mask;
|
|
module_param(debug_mask, ulong, 0644);
|
|
|
|
MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
|
|
|
|
static int ide_cd_probe(ide_drive_t *drive)
|
|
{
|
|
struct cdrom_info *info;
|
|
struct gendisk *g;
|
|
struct request_sense sense;
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
|
|
drive->driver_req, drive->media);
|
|
|
|
if (!strstr("ide-cdrom", drive->driver_req))
|
|
goto failed;
|
|
|
|
if (drive->media != ide_cdrom && drive->media != ide_optical)
|
|
goto failed;
|
|
|
|
drive->debug_mask = debug_mask;
|
|
drive->irq_handler = cdrom_newpc_intr;
|
|
|
|
info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
|
|
if (info == NULL) {
|
|
printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
|
|
drive->name);
|
|
goto failed;
|
|
}
|
|
|
|
g = alloc_disk(1 << PARTN_BITS);
|
|
if (!g)
|
|
goto out_free_cd;
|
|
|
|
ide_init_disk(g, drive);
|
|
|
|
info->dev.parent = &drive->gendev;
|
|
info->dev.release = ide_cd_release;
|
|
dev_set_name(&info->dev, dev_name(&drive->gendev));
|
|
|
|
if (device_register(&info->dev))
|
|
goto out_free_disk;
|
|
|
|
info->drive = drive;
|
|
info->driver = &ide_cdrom_driver;
|
|
info->disk = g;
|
|
|
|
g->private_data = &info->driver;
|
|
|
|
drive->driver_data = info;
|
|
|
|
g->minors = 1;
|
|
g->driverfs_dev = &drive->gendev;
|
|
g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
|
|
if (ide_cdrom_setup(drive)) {
|
|
put_device(&info->dev);
|
|
goto failed;
|
|
}
|
|
|
|
ide_cd_read_toc(drive, &sense);
|
|
g->fops = &idecd_ops;
|
|
g->flags |= GENHD_FL_REMOVABLE;
|
|
add_disk(g);
|
|
return 0;
|
|
|
|
out_free_disk:
|
|
put_disk(g);
|
|
out_free_cd:
|
|
kfree(info);
|
|
failed:
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit ide_cdrom_exit(void)
|
|
{
|
|
driver_unregister(&ide_cdrom_driver.gen_driver);
|
|
}
|
|
|
|
static int __init ide_cdrom_init(void)
|
|
{
|
|
printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
|
|
return driver_register(&ide_cdrom_driver.gen_driver);
|
|
}
|
|
|
|
MODULE_ALIAS("ide:*m-cdrom*");
|
|
MODULE_ALIAS("ide-cd");
|
|
module_init(ide_cdrom_init);
|
|
module_exit(ide_cdrom_exit);
|
|
MODULE_LICENSE("GPL");
|