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2dc75d3c3b
linux_dsm_epyc7002/drivers/ide/ide-cd.c
Jens Axboe 2dc75d3c3b block: disable sysfs parts of the disk command filter 
We still have life time issues with the sysfs command filter kobject,
so disable it for 2.6.27 release. We can revisit this and make it work
properly for 2.6.28, for 2.6.27 release it's too risky.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-09-11 14:20:23 +02:00

2184 lines
56 KiB
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/*
* ATAPI CD-ROM driver.
*
* Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
* Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
* Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
* Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* See Documentation/cdrom/ide-cd for usage information.
*
* Suggestions are welcome. Patches that work are more welcome though. ;-)
* For those wishing to work on this driver, please be sure you download
* and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
* (SFF-8020i rev 2.6) standards. These documents can be obtained by
* anonymous ftp from:
* ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
* ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
*
* For historical changelog please see:
* Documentation/ide/ChangeLog.ide-cd.1994-2004
*/
#define IDECD_VERSION "5.00"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/cdrom.h>
#include <linux/ide.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/bcd.h>
/* For SCSI -> ATAPI command conversion */
#include <scsi/scsi.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/byteorder.h>
#include <linux/uaccess.h>
#include <asm/unaligned.h>
#include "ide-cd.h"
static DEFINE_MUTEX(idecd_ref_mutex);
#define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
#define ide_cd_g(disk) \
container_of((disk)->private_data, struct cdrom_info, driver)
static void ide_cd_release(struct kref *);
static struct cdrom_info *ide_cd_get(struct gendisk *disk)
{
struct cdrom_info *cd = NULL;
mutex_lock(&idecd_ref_mutex);
cd = ide_cd_g(disk);
if (cd) {
if (ide_device_get(cd->drive))
cd = NULL;
else
kref_get(&cd->kref);
}
mutex_unlock(&idecd_ref_mutex);
return cd;
}
static void ide_cd_put(struct cdrom_info *cd)
{
ide_drive_t *drive = cd->drive;
mutex_lock(&idecd_ref_mutex);
kref_put(&cd->kref, ide_cd_release);
ide_device_put(drive);
mutex_unlock(&idecd_ref_mutex);
}
/*
* Generic packet command support and error handling routines.
*/
/* Mark that we've seen a media change and invalidate our internal buffers. */
static void cdrom_saw_media_change(ide_drive_t *drive)
{
drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
}
static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
struct request_sense *sense)
{
int log = 0;
if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
return 0;
switch (sense->sense_key) {
case NO_SENSE:
case RECOVERED_ERROR:
break;
case NOT_READY:
/*
* don't care about tray state messages for e.g. capacity
* commands or in-progress or becoming ready
*/
if (sense->asc == 0x3a || sense->asc == 0x04)
break;
log = 1;
break;
case ILLEGAL_REQUEST:
/*
* don't log START_STOP unit with LoEj set, since we cannot
* reliably check if drive can auto-close
*/
if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
break;
log = 1;
break;
case UNIT_ATTENTION:
/*
* Make good and sure we've seen this potential media change.
* Some drives (i.e. Creative) fail to present the correct sense
* key in the error register.
*/
cdrom_saw_media_change(drive);
break;
default:
log = 1;
break;
}
return log;
}
static void cdrom_analyze_sense_data(ide_drive_t *drive,
struct request *failed_command,
struct request_sense *sense)
{
unsigned long sector;
unsigned long bio_sectors;
struct cdrom_info *info = drive->driver_data;
if (!cdrom_log_sense(drive, failed_command, sense))
return;
/*
* If a read toc is executed for a CD-R or CD-RW medium where the first
* toc has not been recorded yet, it will fail with 05/24/00 (which is a
* confusing error)
*/
if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
if (sense->sense_key == 0x05 && sense->asc == 0x24)
return;
/* current error */
if (sense->error_code == 0x70) {
switch (sense->sense_key) {
case MEDIUM_ERROR:
case VOLUME_OVERFLOW:
case ILLEGAL_REQUEST:
if (!sense->valid)
break;
if (failed_command == NULL ||
!blk_fs_request(failed_command))
break;
sector = (sense->information[0] << 24) |
(sense->information[1] << 16) |
(sense->information[2] << 8) |
(sense->information[3]);
if (drive->queue->hardsect_size == 2048)
/* device sector size is 2K */
sector <<= 2;
bio_sectors = max(bio_sectors(failed_command->bio), 4U);
sector &= ~(bio_sectors - 1);
if (sector < get_capacity(info->disk) &&
drive->probed_capacity - sector < 4 * 75)
set_capacity(info->disk, sector);
}
}
ide_cd_log_error(drive->name, failed_command, sense);
}
static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
struct request *failed_command)
{
struct cdrom_info *info = drive->driver_data;
struct request *rq = &info->request_sense_request;
if (sense == NULL)
sense = &info->sense_data;
/* stuff the sense request in front of our current request */
blk_rq_init(NULL, rq);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->rq_disk = info->disk;
rq->data = sense;
rq->cmd[0] = GPCMD_REQUEST_SENSE;
rq->cmd[4] = 18;
rq->data_len = 18;
rq->cmd_type = REQ_TYPE_SENSE;
rq->cmd_flags |= REQ_PREEMPT;
/* NOTE! Save the failed command in "rq->buffer" */
rq->buffer = (void *) failed_command;
ide_do_drive_cmd(drive, rq);
}
static void cdrom_end_request(ide_drive_t *drive, int uptodate)
{
struct request *rq = HWGROUP(drive)->rq;
int nsectors = rq->hard_cur_sectors;
if (blk_sense_request(rq) && uptodate) {
/*
* For REQ_TYPE_SENSE, "rq->buffer" points to the original
* failed request
*/
struct request *failed = (struct request *) rq->buffer;
struct cdrom_info *info = drive->driver_data;
void *sense = &info->sense_data;
unsigned long flags;
if (failed) {
if (failed->sense) {
sense = failed->sense;
failed->sense_len = rq->sense_len;
}
cdrom_analyze_sense_data(drive, failed, sense);
/*
* now end the failed request
*/
if (blk_fs_request(failed)) {
if (ide_end_dequeued_request(drive, failed, 0,
failed->hard_nr_sectors))
BUG();
} else {
spin_lock_irqsave(&ide_lock, flags);
if (__blk_end_request(failed, -EIO,
failed->data_len))
BUG();
spin_unlock_irqrestore(&ide_lock, flags);
}
} else
cdrom_analyze_sense_data(drive, NULL, sense);
}
if (!rq->current_nr_sectors && blk_fs_request(rq))
uptodate = 1;
/* make sure it's fully ended */
if (blk_pc_request(rq))
nsectors = (rq->data_len + 511) >> 9;
if (!nsectors)
nsectors = 1;
ide_end_request(drive, uptodate, nsectors);
}
static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
{
if (st & 0x80)
return;
ide_dump_status(drive, msg, st);
}
/*
* Returns:
* 0: if the request should be continued.
* 1: if the request was ended.
*/
static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->hwgroup->rq;
int stat, err, sense_key;
/* check for errors */
stat = hwif->tp_ops->read_status(hwif);
if (stat_ret)
*stat_ret = stat;
if (OK_STAT(stat, good_stat, BAD_R_STAT))
return 0;
/* get the IDE error register */
err = ide_read_error(drive);
sense_key = err >> 4;
if (rq == NULL) {
printk(KERN_ERR "%s: missing rq in %s\n",
drive->name, __func__);
return 1;
}
if (blk_sense_request(rq)) {
/*
* We got an error trying to get sense info from the drive
* (probably while trying to recover from a former error).
* Just give up.
*/
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
ide_error(drive, "request sense failure", stat);
return 1;
} else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
/* All other functions, except for READ. */
/*
* if we have an error, pass back CHECK_CONDITION as the
* scsi status byte
*/
if (blk_pc_request(rq) && !rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
/* check for tray open */
if (sense_key == NOT_READY) {
cdrom_saw_media_change(drive);
} else if (sense_key == UNIT_ATTENTION) {
/* check for media change */
cdrom_saw_media_change(drive);
return 0;
} else if (sense_key == ILLEGAL_REQUEST &&
rq->cmd[0] == GPCMD_START_STOP_UNIT) {
/*
* Don't print error message for this condition--
* SFF8090i indicates that 5/24/00 is the correct
* response to a request to close the tray if the
* drive doesn't have that capability.
* cdrom_log_sense() knows this!
*/
} else if (!(rq->cmd_flags & REQ_QUIET)) {
/* otherwise, print an error */
ide_dump_status(drive, "packet command error", stat);
}
rq->cmd_flags |= REQ_FAILED;
/*
* instead of playing games with moving completions around,
* remove failed request completely and end it when the
* request sense has completed
*/
goto end_request;
} else if (blk_fs_request(rq)) {
int do_end_request = 0;
/* handle errors from READ and WRITE requests */
if (blk_noretry_request(rq))
do_end_request = 1;
if (sense_key == NOT_READY) {
/* tray open */
if (rq_data_dir(rq) == READ) {
cdrom_saw_media_change(drive);
/* fail the request */
printk(KERN_ERR "%s: tray open\n", drive->name);
do_end_request = 1;
} else {
struct cdrom_info *info = drive->driver_data;
/*
* Allow the drive 5 seconds to recover, some
* devices will return this error while flushing
* data from cache.
*/
if (!rq->errors)
info->write_timeout = jiffies +
ATAPI_WAIT_WRITE_BUSY;
rq->errors = 1;
if (time_after(jiffies, info->write_timeout))
do_end_request = 1;
else {
unsigned long flags;
/*
* take a breather relying on the unplug
* timer to kick us again
*/
spin_lock_irqsave(&ide_lock, flags);
blk_plug_device(drive->queue);
spin_unlock_irqrestore(&ide_lock,
flags);
return 1;
}
}
} else if (sense_key == UNIT_ATTENTION) {
/* media change */
cdrom_saw_media_change(drive);
/*
* Arrange to retry the request but be sure to give up
* if we've retried too many times.
*/
if (++rq->errors > ERROR_MAX)
do_end_request = 1;
} else if (sense_key == ILLEGAL_REQUEST ||
sense_key == DATA_PROTECT) {
/*
* No point in retrying after an illegal request or data
* protect error.
*/
ide_dump_status_no_sense(drive, "command error", stat);
do_end_request = 1;
} else if (sense_key == MEDIUM_ERROR) {
/*
* No point in re-trying a zillion times on a bad
* sector. If we got here the error is not correctable.
*/
ide_dump_status_no_sense(drive,
"media error (bad sector)",
stat);
do_end_request = 1;
} else if (sense_key == BLANK_CHECK) {
/* disk appears blank ?? */
ide_dump_status_no_sense(drive, "media error (blank)",
stat);
do_end_request = 1;
} else if ((err & ~ABRT_ERR) != 0) {
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
} else if ((++rq->errors > ERROR_MAX)) {
/* we've racked up too many retries, abort */
do_end_request = 1;
}
/*
* End a request through request sense analysis when we have
* sense data. We need this in order to perform end of media
* processing.
*/
if (do_end_request)
goto end_request;
/*
* If we got a CHECK_CONDITION status, queue
* a request sense command.
*/
if (stat & ERR_STAT)
cdrom_queue_request_sense(drive, NULL, NULL);
} else {
blk_dump_rq_flags(rq, "ide-cd: bad rq");
cdrom_end_request(drive, 0);
}
/* retry, or handle the next request */
return 1;
end_request:
if (stat & ERR_STAT) {
unsigned long flags;
spin_lock_irqsave(&ide_lock, flags);
blkdev_dequeue_request(rq);
HWGROUP(drive)->rq = NULL;
spin_unlock_irqrestore(&ide_lock, flags);
cdrom_queue_request_sense(drive, rq->sense, rq);
} else
cdrom_end_request(drive, 0);
return 1;
}
static int cdrom_timer_expiry(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned long wait = 0;
/*
* Some commands are *slow* and normally take a long time to complete.
* Usually we can use the ATAPI "disconnect" to bypass this, but not all
* commands/drives support that. Let ide_timer_expiry keep polling us
* for these.
*/
switch (rq->cmd[0]) {
case GPCMD_BLANK:
case GPCMD_FORMAT_UNIT:
case GPCMD_RESERVE_RZONE_TRACK:
case GPCMD_CLOSE_TRACK:
case GPCMD_FLUSH_CACHE:
wait = ATAPI_WAIT_PC;
break;
default:
if (!(rq->cmd_flags & REQ_QUIET))
printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
rq->cmd[0]);
wait = 0;
break;
}
return wait;
}
/*
* Set up the device registers for transferring a packet command on DEV,
* expecting to later transfer XFERLEN bytes. HANDLER is the routine
* which actually transfers the command to the drive. If this is a
* drq_interrupt device, this routine will arrange for HANDLER to be
* called when the interrupt from the drive arrives. Otherwise, HANDLER
* will be called immediately after the drive is prepared for the transfer.
*/
static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
int xferlen,
ide_handler_t *handler)
{
struct cdrom_info *info = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
/* FIXME: for Virtual DMA we must check harder */
if (info->dma)
info->dma = !hwif->dma_ops->dma_setup(drive);
/* set up the controller registers */
ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
xferlen, info->dma);
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
/* waiting for CDB interrupt, not DMA yet. */
if (info->dma)
drive->waiting_for_dma = 0;
/* packet command */
ide_execute_command(drive, WIN_PACKETCMD, handler,
ATAPI_WAIT_PC, cdrom_timer_expiry);
return ide_started;
} else {
ide_execute_pkt_cmd(drive);
return (*handler) (drive);
}
}
/*
* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
* registers must have already been prepared by cdrom_start_packet_command.
* HANDLER is the interrupt handler to call when the command completes or
* there's data ready.
*/
#define ATAPI_MIN_CDB_BYTES 12
static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
struct request *rq,
ide_handler_t *handler)
{
ide_hwif_t *hwif = drive->hwif;
int cmd_len;
struct cdrom_info *info = drive->driver_data;
ide_startstop_t startstop;
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
/*
* Here we should have been called after receiving an interrupt
* from the device. DRQ should how be set.
*/
/* check for errors */
if (cdrom_decode_status(drive, DRQ_STAT, NULL))
return ide_stopped;
/* ok, next interrupt will be DMA interrupt */
if (info->dma)
drive->waiting_for_dma = 1;
} else {
/* otherwise, we must wait for DRQ to get set */
if (ide_wait_stat(&startstop, drive, DRQ_STAT,
BUSY_STAT, WAIT_READY))
return startstop;
}
/* arm the interrupt handler */
ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
/* ATAPI commands get padded out to 12 bytes minimum */
cmd_len = COMMAND_SIZE(rq->cmd[0]);
if (cmd_len < ATAPI_MIN_CDB_BYTES)
cmd_len = ATAPI_MIN_CDB_BYTES;
/* send the command to the device */
hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
/* start the DMA if need be */
if (info->dma)
hwif->dma_ops->dma_start(drive);
return ide_started;
}
/*
* Check the contents of the interrupt reason register from the cdrom
* and attempt to recover if there are problems. Returns 0 if everything's
* ok; nonzero if the request has been terminated.
*/
static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
int len, int ireason, int rw)
{
ide_hwif_t *hwif = drive->hwif;
/*
* ireason == 0: the drive wants to receive data from us
* ireason == 2: the drive is expecting to transfer data to us
*/
if (ireason == (!rw << 1))
return 0;
else if (ireason == (rw << 1)) {
/* whoops... */
printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
drive->name, __func__);
ide_pad_transfer(drive, rw, len);
} else if (rw == 0 && ireason == 1) {
/*
* Some drives (ASUS) seem to tell us that status info is
* available. Just get it and ignore.
*/
(void)hwif->tp_ops->read_status(hwif);
return 0;
} else {
/* drive wants a command packet, or invalid ireason... */
printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
drive->name, __func__, ireason);
}
if (rq->cmd_type == REQ_TYPE_ATA_PC)
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
return -1;
}
/*
* Assume that the drive will always provide data in multiples of at least
* SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
*/
static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
{
if ((len % SECTOR_SIZE) == 0)
return 0;
printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
drive->name, __func__, len);
if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
printk(KERN_ERR " This drive is not supported by "
"this version of the driver\n");
else {
printk(KERN_ERR " Trying to limit transfer sizes\n");
drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
}
return 1;
}
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
struct request *rq)
{
if (rq_data_dir(rq) == READ) {
unsigned short sectors_per_frame =
queue_hardsect_size(drive->queue) >> SECTOR_BITS;
int nskip = rq->sector & (sectors_per_frame - 1);
/*
* If the requested sector doesn't start on a frame boundary,
* we must adjust the start of the transfer so that it does,
* and remember to skip the first few sectors.
*
* If the rq->current_nr_sectors field is larger than the size
* of the buffer, it will mean that we're to skip a number of
* sectors equal to the amount by which rq->current_nr_sectors
* is larger than the buffer size.
*/
if (nskip > 0) {
/* sanity check... */
if (rq->current_nr_sectors !=
bio_cur_sectors(rq->bio)) {
printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
drive->name, __func__,
rq->current_nr_sectors);
cdrom_end_request(drive, 0);
return ide_stopped;
}
rq->current_nr_sectors += nskip;
}
}
#if 0
else
/* the immediate bit */
rq->cmd[1] = 1 << 3;
#endif
/* set up the command */
rq->timeout = ATAPI_WAIT_PC;
return ide_started;
}
/*
* Routine to send a read/write packet command to the drive. This is usually
* called directly from cdrom_start_{read,write}(). However, for drq_interrupt
* devices, it is called from an interrupt when the drive is ready to accept
* the command.
*/
static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
{
struct request *rq = drive->hwif->hwgroup->rq;
/* send the command to the drive and return */
return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
}
#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
int stat;
static int retry = 10;
if (cdrom_decode_status(drive, 0, &stat))
return ide_stopped;
drive->atapi_flags |= IDE_AFLAG_SEEKING;
if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
if (--retry == 0)
drive->dsc_overlap = 0;
}
return ide_stopped;
}
static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
{
sector_t frame = rq->sector;
sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
memset(rq->cmd, 0, BLK_MAX_CDB);
rq->cmd[0] = GPCMD_SEEK;
put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
rq->timeout = ATAPI_WAIT_PC;
}
static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
{
struct request *rq = drive->hwif->hwgroup->rq;
return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
}
/*
* Fix up a possibly partially-processed request so that we can start it over
* entirely, or even put it back on the request queue.
*/
static void restore_request(struct request *rq)
{
if (rq->buffer != bio_data(rq->bio)) {
sector_t n =
(rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
rq->buffer = bio_data(rq->bio);
rq->nr_sectors += n;
rq->sector -= n;
}
rq->current_nr_sectors = bio_cur_sectors(rq->bio);
rq->hard_cur_sectors = rq->current_nr_sectors;
rq->hard_nr_sectors = rq->nr_sectors;
rq->hard_sector = rq->sector;
rq->q->prep_rq_fn(rq->q, rq);
}
/*
* All other packet commands.
*/
static void ide_cd_request_sense_fixup(struct request *rq)
{
/*
* Some of the trailing request sense fields are optional,
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
rq->data_len > 0 && rq->data_len <= 5)
while (rq->data_len > 0) {
*(u8 *)rq->data++ = 0;
--rq->data_len;
}
}
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
int write, void *buffer, unsigned *bufflen,
struct request_sense *sense, int timeout,
unsigned int cmd_flags)
{
struct cdrom_info *info = drive->driver_data;
struct request_sense local_sense;
int retries = 10;
unsigned int flags = 0;
if (!sense)
sense = &local_sense;
/* start of retry loop */
do {
struct request *rq;
int error;
rq = blk_get_request(drive->queue, write, __GFP_WAIT);
memcpy(rq->cmd, cmd, BLK_MAX_CDB);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->sense = sense;
rq->cmd_flags |= cmd_flags;
rq->timeout = timeout;
if (buffer) {
rq->data = buffer;
rq->data_len = *bufflen;
}
error = blk_execute_rq(drive->queue, info->disk, rq, 0);
if (buffer)
*bufflen = rq->data_len;
flags = rq->cmd_flags;
blk_put_request(rq);
/*
* FIXME: we should probably abort/retry or something in case of
* failure.
*/
if (flags & REQ_FAILED) {
/*
* The request failed. Retry if it was due to a unit
* attention status (usually means media was changed).
*/
struct request_sense *reqbuf = sense;
if (reqbuf->sense_key == UNIT_ATTENTION)
cdrom_saw_media_change(drive);
else if (reqbuf->sense_key == NOT_READY &&
reqbuf->asc == 4 && reqbuf->ascq != 4) {
/*
* The drive is in the process of loading
* a disk. Retry, but wait a little to give
* the drive time to complete the load.
*/
ssleep(2);
} else {
/* otherwise, don't retry */
retries = 0;
}
--retries;
}
/* end of retry loop */
} while ((flags & REQ_FAILED) && retries >= 0);
/* return an error if the command failed */
return (flags & REQ_FAILED) ? -EIO : 0;
}
/*
* Called from blk_end_request_callback() after the data of the request is
* completed and before the request itself is completed. By returning value '1',
* blk_end_request_callback() returns immediately without completing it.
*/
static int cdrom_newpc_intr_dummy_cb(struct request *rq)
{
return 1;
}
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct cdrom_info *info = drive->driver_data;
struct request *rq = HWGROUP(drive)->rq;
xfer_func_t *xferfunc;
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, stat, thislen, uptodate = 0;
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
unsigned int timeout;
u16 len;
u8 ireason;
/* check for errors */
dma = info->dma;
if (dma) {
info->dma = 0;
dma_error = hwif->dma_ops->dma_end(drive);
if (dma_error) {
printk(KERN_ERR "%s: DMA %s error\n", drive->name,
write ? "write" : "read");
ide_dma_off(drive);
}
}
if (cdrom_decode_status(drive, 0, &stat))
return ide_stopped;
/* using dma, transfer is complete now */
if (dma) {
if (dma_error)
return ide_error(drive, "dma error", stat);
if (blk_fs_request(rq)) {
ide_end_request(drive, 1, rq->nr_sectors);
return ide_stopped;
}
goto end_request;
}
ide_read_bcount_and_ireason(drive, &len, &ireason);
thislen = blk_fs_request(rq) ? len : rq->data_len;
if (thislen > len)
thislen = len;
/* If DRQ is clear, the command has completed. */
if ((stat & DRQ_STAT) == 0) {
if (blk_fs_request(rq)) {
/*
* If we're not done reading/writing, complain.
* Otherwise, complete the command normally.
*/
uptodate = 1;
if (rq->current_nr_sectors > 0) {
printk(KERN_ERR "%s: %s: data underrun "
"(%d blocks)\n",
drive->name, __func__,
rq->current_nr_sectors);
if (!write)
rq->cmd_flags |= REQ_FAILED;
uptodate = 0;
}
cdrom_end_request(drive, uptodate);
return ide_stopped;
} else if (!blk_pc_request(rq)) {
ide_cd_request_sense_fixup(rq);
/* complain if we still have data left to transfer */
uptodate = rq->data_len ? 0 : 1;
}
goto end_request;
}
/* check which way to transfer data */
if (ide_cd_check_ireason(drive, rq, len, ireason, write))
return ide_stopped;
if (blk_fs_request(rq)) {
if (write == 0) {
int nskip;
if (ide_cd_check_transfer_size(drive, len)) {
cdrom_end_request(drive, 0);
return ide_stopped;
}
/*
* First, figure out if we need to bit-bucket
* any of the leading sectors.
*/
nskip = min_t(int, rq->current_nr_sectors
- bio_cur_sectors(rq->bio),
thislen >> 9);
if (nskip > 0) {
ide_pad_transfer(drive, write, nskip << 9);
rq->current_nr_sectors -= nskip;
thislen -= (nskip << 9);
}
}
}
if (ireason == 0) {
write = 1;
xferfunc = hwif->tp_ops->output_data;
} else {
write = 0;
xferfunc = hwif->tp_ops->input_data;
}
/* transfer data */
while (thislen > 0) {
u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
int blen = rq->data_len;
/* bio backed? */
if (rq->bio) {
if (blk_fs_request(rq)) {
ptr = rq->buffer;
blen = rq->current_nr_sectors << 9;
} else {
ptr = bio_data(rq->bio);
blen = bio_iovec(rq->bio)->bv_len;
}
}
if (!ptr) {
if (blk_fs_request(rq) && !write)
/*
* If the buffers are full, pipe the rest into
* oblivion.
*/
ide_pad_transfer(drive, 0, thislen);
else {
printk(KERN_ERR "%s: confused, missing data\n",
drive->name);
blk_dump_rq_flags(rq, rq_data_dir(rq)
? "cdrom_newpc_intr, write"
: "cdrom_newpc_intr, read");
}
break;
}
if (blen > thislen)
blen = thislen;
xferfunc(drive, NULL, ptr, blen);
thislen -= blen;
len -= blen;
if (blk_fs_request(rq)) {
rq->buffer += blen;
rq->nr_sectors -= (blen >> 9);
rq->current_nr_sectors -= (blen >> 9);
rq->sector += (blen >> 9);
if (rq->current_nr_sectors == 0 && rq->nr_sectors)
cdrom_end_request(drive, 1);
} else {
rq->data_len -= blen;
/*
* The request can't be completed until DRQ is cleared.
* So complete the data, but don't complete the request
* using the dummy function for the callback feature
* of blk_end_request_callback().
*/
if (rq->bio)
blk_end_request_callback(rq, 0, blen,
cdrom_newpc_intr_dummy_cb);
else
rq->data += blen;
}
if (!write && blk_sense_request(rq))
rq->sense_len += blen;
}
/* pad, if necessary */
if (!blk_fs_request(rq) && len > 0)
ide_pad_transfer(drive, write, len);
if (blk_pc_request(rq)) {
timeout = rq->timeout;
} else {
timeout = ATAPI_WAIT_PC;
if (!blk_fs_request(rq))
expiry = cdrom_timer_expiry;
}
ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
return ide_started;
end_request:
if (blk_pc_request(rq)) {
unsigned long flags;
unsigned int dlen = rq->data_len;
if (dma)
rq->data_len = 0;
spin_lock_irqsave(&ide_lock, flags);
if (__blk_end_request(rq, 0, dlen))
BUG();
HWGROUP(drive)->rq = NULL;
spin_unlock_irqrestore(&ide_lock, flags);
} else {
if (!uptodate)
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, uptodate);
}
return ide_stopped;
}
static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *cd = drive->driver_data;
int write = rq_data_dir(rq) == WRITE;
unsigned short sectors_per_frame =
queue_hardsect_size(drive->queue) >> SECTOR_BITS;
if (write) {
/* disk has become write protected */
if (cd->disk->policy) {
cdrom_end_request(drive, 0);
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.
*/
restore_request(rq);
}
/* use DMA, if possible / writes *must* be hardware frame aligned */
if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
(rq->sector & (sectors_per_frame - 1))) {
if (write) {
cdrom_end_request(drive, 0);
return ide_stopped;
}
cd->dma = 0;
} else
cd->dma = drive->using_dma;
if (write)
cd->devinfo.media_written = 1;
return ide_started;
}
static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
}
static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *info = drive->driver_data;
if (blk_pc_request(rq))
rq->cmd_flags |= REQ_QUIET;
else
rq->cmd_flags &= ~REQ_FAILED;
info->dma = 0;
/* sg request */
if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
struct request_queue *q = drive->queue;
unsigned int alignment;
unsigned long addr;
unsigned long stack_mask = ~(THREAD_SIZE - 1);
if (rq->bio)
addr = (unsigned long)bio_data(rq->bio);
else
addr = (unsigned long)rq->data;
info->dma = drive->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 (addr & alignment || rq->data_len & alignment)
info->dma = 0;
if (!((addr & stack_mask) ^
((unsigned long)current->stack & stack_mask)))
info->dma = 0;
}
}
/*
* cdrom driver request routine.
*/
static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
sector_t block)
{
struct cdrom_info *info = drive->driver_data;
ide_handler_t *fn;
int xferlen;
if (blk_fs_request(rq)) {
if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
ide_hwif_t *hwif = drive->hwif;
unsigned long elapsed = jiffies - info->start_seek;
int stat = hwif->tp_ops->read_status(hwif);
if ((stat & SEEK_STAT) != SEEK_STAT) {
if (elapsed < IDECD_SEEK_TIMEOUT) {
ide_stall_queue(drive,
IDECD_SEEK_TIMER);
return ide_stopped;
}
printk(KERN_ERR "%s: DSC timeout\n",
drive->name);
}
drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
}
if (rq_data_dir(rq) == READ &&
IDE_LARGE_SEEK(info->last_block, block,
IDECD_SEEK_THRESHOLD) &&
drive->dsc_overlap) {
xferlen = 0;
fn = cdrom_start_seek_continuation;
info->dma = 0;
info->start_seek = jiffies;
ide_cd_prepare_seek_request(drive, rq);
} else {
xferlen = 32768;
fn = cdrom_start_rw_cont;
if (cdrom_start_rw(drive, rq) == ide_stopped)
return ide_stopped;
if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
return ide_stopped;
}
info->last_block = block;
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC) {
xferlen = rq->data_len;
fn = cdrom_do_newpc_cont;
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... */
cdrom_end_request(drive, 1);
return ide_stopped;
} else {
blk_dump_rq_flags(rq, "ide-cd bad flags");
cdrom_end_request(drive, 0);
return ide_stopped;
}
return cdrom_start_packet_command(drive, xferlen, fn);
}
/*
* 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];
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;
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 "%s: weird block size %u\n",
drive->name, blocklen);
printk(KERN_ERR "%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;
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];
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;
if (toc == NULL) {
/* try to allocate space */
toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
if (toc == NULL) {
printk(KERN_ERR "%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, &sectors_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_hardsect_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;
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;
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]);
}
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;
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;
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 "%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->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
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)
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 "%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_hardsect_size(q);
long block = (long)rq->hard_sector / (hard_sect >> 9);
unsigned long blocks = rq->hard_nr_sectors / (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, &sectors_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 void ide_cdrom_add_settings(ide_drive_t *drive)
{
ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
&drive->dsc_overlap, NULL);
}
#else
static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
#endif
static const struct cd_list_entry ide_cd_quirks_list[] = {
/* Limit transfer size per interrupt. */
{ "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
{ "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
/* 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 },
{ NULL, NULL, 0 }
};
static unsigned int ide_cd_flags(struct hd_driveid *id)
{
const struct cd_list_entry *cle = ide_cd_quirks_list;
while (cle->id_model) {
if (strcmp(cle->id_model, id->model) == 0 &&
(cle->id_firmware == NULL ||
strstr(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 hd_driveid *id = drive->id;
int nslots;
blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
blk_queue_dma_alignment(drive->queue, 31);
blk_queue_update_dma_pad(drive->queue, 15);
drive->queue->unplug_delay = (1 * HZ) / 1000;
if (!drive->queue->unplug_delay)
drive->queue->unplug_delay = 1;
drive->special.all = 0;
drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
ide_cd_flags(id);
if ((id->config & 0x0060) == 0x20)
drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
id->fw_rev[4] == '1' && id->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) &&
id->fw_rev[4] == '1' && id->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);
/* set correct block size */
blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
drive->dsc_overlap = (drive->next != drive);
if (ide_cdrom_register(drive, nslots)) {
printk(KERN_ERR "%s: %s failed to register device with the"
" cdrom driver.\n", drive->name, __func__);
cd->devinfo.handle = NULL;
return 1;
}
ide_cdrom_add_settings(drive);
return 0;
}
static void ide_cd_remove(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
ide_proc_unregister_driver(drive, info->driver);
del_gendisk(info->disk);
ide_cd_put(info);
}
static void ide_cd_release(struct kref *kref)
{
struct cdrom_info *info = to_ide_cd(kref);
struct cdrom_device_info *devinfo = &info->devinfo;
ide_drive_t *drive = info->drive;
struct gendisk *g = info->disk;
kfree(info->toc);
if (devinfo->handle == drive)
unregister_cdrom(devinfo);
drive->dsc_overlap = 0;
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 ide_driver_t 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,
.media = ide_cdrom,
.supports_dsc_overlap = 1,
.do_request = ide_cd_do_request,
.end_request = ide_end_request,
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idecd_proc,
#endif
};
static int idecd_open(struct inode *inode, struct file *file)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct cdrom_info *info;
int rc = -ENOMEM;
info = ide_cd_get(disk);
if (!info)
return -ENXIO;
rc = cdrom_open(&info->devinfo, inode, file);
if (rc < 0)
ide_cd_put(info);
return rc;
}
static int idecd_release(struct inode *inode, struct file *file)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct cdrom_info *info = ide_cd_g(disk);
cdrom_release(&info->devinfo, file);
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 inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct block_device *bdev = inode->i_bdev;
struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
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, file, bdev, cmd, arg);
if (err == -EINVAL)
err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
return err;
}
static int idecd_media_changed(struct gendisk *disk)
{
struct cdrom_info *info = ide_cd_g(disk);
return cdrom_media_changed(&info->devinfo);
}
static int idecd_revalidate_disk(struct gendisk *disk)
{
struct cdrom_info *info = ide_cd_g(disk);
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,
.ioctl = idecd_ioctl,
.media_changed = idecd_media_changed,
.revalidate_disk = idecd_revalidate_disk
};
/* module options */
static char *ignore;
module_param(ignore, charp, 0400);
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;
if (!strstr("ide-cdrom", drive->driver_req))
goto failed;
if (!drive->present)
goto failed;
if (drive->media != ide_cdrom && drive->media != ide_optical)
goto failed;
/* skip drives that we were told to ignore */
if (ignore != NULL) {
if (strstr(ignore, drive->name)) {
printk(KERN_INFO "ide-cd: ignoring drive %s\n",
drive->name);
goto failed;
}
}
info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
if (info == NULL) {
printk(KERN_ERR "%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);
ide_proc_register_driver(drive, &ide_cdrom_driver);
kref_init(&info->kref);
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)) {
ide_proc_unregister_driver(drive, &ide_cdrom_driver);
ide_cd_release(&info->kref);
goto failed;
}
ide_cd_read_toc(drive, &sense);
g->fops = &idecd_ops;
g->flags |= GENHD_FL_REMOVABLE;
add_disk(g);
return 0;
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)
{
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");
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