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ide-cd.c
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/*
* linux/drivers/ide/ide-cd.c
*
* Copyright (C) 1994, 1995, 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>
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* ATAPI CD-ROM driver. To be used with ide.c.
* 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
*
* Drives that deviate from these standards will be accommodated as much
* as possible via compile time or command-line options. Since I only have
* a few drives, you generally need to send me patches...
*
* ----------------------------------
* TO DO LIST:
* -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on
* boot
*
* ----------------------------------
* 1.00 Oct 31, 1994 -- Initial version.
* 1.01 Nov 2, 1994 -- Fixed problem with starting request in
* cdrom_check_status.
* 1.03 Nov 25, 1994 -- leaving unmask_intr[] as a user-setting (as for disks)
* (from mlord) -- minor changes to cdrom_setup()
* -- renamed ide_dev_s to ide_drive_t, enable irq on command
* 2.00 Nov 27, 1994 -- Generalize packet command interface;
* add audio ioctls.
* 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices
* which send an interrupt when ready for a command.
* 2.02 Dec 11, 1994 -- Cache the TOC in the driver.
* Don't use SCMD_PLAYAUDIO_TI; it's not included
* in the current version of ATAPI.
* Try to use LBA instead of track or MSF addressing
* when possible.
* Don't wait for READY_STAT.
* 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes
* other than 2k and to move multiple sectors in a
* single transaction.
* 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives.
* Thanks to Nick Saw <cwsaw@pts7.pts.mot.com> for
* help in figuring this out. Ditto for Acer and
* Aztech drives, which seem to have the same problem.
* 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml
* 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request
* or data protect error.
* Use HWIF and DEV_HWIF macros as in ide.c.
* Always try to do a request_sense after
* a failed command.
* Include an option to give textual descriptions
* of ATAPI errors.
* Fix a bug in handling the sector cache which
* showed up if the drive returned data in 512 byte
* blocks (like Pioneer drives). Thanks to
* Richard Hirst <srh@gpt.co.uk> for diagnosing this.
* Properly supply the page number field in the
* MODE_SELECT command.
* PLAYAUDIO12 is broken on the Aztech; work around it.
* 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c
* (my apologies to Scott, but now ide-cd.c is independent)
* 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl.
* Implement CDROMREADAUDIO ioctl (UNTESTED).
* Use input_ide_data() and output_ide_data().
* Add door locking.
* Fix usage count leak in cdrom_open, which happened
* when a read-write mount was attempted.
* Try to load the disk on open.
* Implement CDROMEJECT_SW ioctl (off by default).
* Read total cdrom capacity during open.
* Rearrange logic in cdrom_decode_status. Issue
* request sense commands for failed packet commands
* from here instead of from cdrom_queue_packet_command.
* Fix a race condition in retrieving error information.
* Suppress printing normal unit attention errors and
* some drive not ready errors.
* Implement CDROMVOLREAD ioctl.
* Implement CDROMREADMODE1/2 ioctls.
* Fix race condition in setting up interrupt handlers
* when the `serialize' option is used.
* 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in
* cdrom_queue_request.
* Another try at using ide_[input,output]_data.
* 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well.
* Make VERBOSE_IDE_CD_ERRORS dump failed command again.
* Dump out more information for ILLEGAL REQUEST errs.
* Fix handling of errors occurring before the
* packet command is transferred.
* Fix transfers with odd bytelengths.
* 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'.
* `DCI-2S10' drives are broken too.
* 3.04 Nov 20, 1995 -- So are Vertos drives.
* 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c
* 3.06 Dec 16, 1995 -- Add support needed for partitions.
* More workarounds for Vertos bugs (based on patches
* from Holger Dietze <dietze@aix520.informatik.uni-leipzig.de>).
* Try to eliminate byteorder assumptions.
* Use atapi_cdrom_subchnl struct definition.
* Add STANDARD_ATAPI compilation option.
* 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D,
* Vertos 300.
* Add NO_DOOR_LOCKING configuration option.
* Handle drive_cmd requests w/NULL args (for hdparm -t).
* Work around sporadic Sony55e audio play problem.
* 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix
* problem with "hde=cdrom" with no drive present. -ml
* 3.08 Mar 6, 1996 -- More Vertos workarounds.
* 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl.
* Switch to using MSF addressing for audio commands.
* Reformat to match kernel tabbing style.
* Add CDROM_GET_UPC ioctl.
* 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI.
* 3.11 Apr 29, 1996 -- Patch from Heiko Eissfeldt <heiko@colossus.escape.de>
* to remove redundant verify_area calls.
* 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches
* from Gerhard Zuber <zuber@berlin.snafu.de>.
* Let open succeed even if there's no loaded disc.
* 3.13 May 19, 1996 -- Fixes for changer code.
* 3.14 May 29, 1996 -- Add work-around for Vertos 600.
* (From Hennus Bergman <hennus@sky.ow.nl>.)
* 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers
* from Ben Galliart <bgallia@luc.edu> with
* special help from Jeff Lightfoot
* <jeffml@pobox.com>
* 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification
* 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl.
* 3.17 Sep 17, 1996 -- Tweak audio reads for some drives.
* Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC.
* 3.18 Oct 31, 1996 -- Added module and DMA support.
*
*
* 4.00 Nov 5, 1996 -- New ide-cd maintainer,
* Erik B. Andersen <andersee@debian.org>
* -- Newer Creative drives don't always set the error
* register correctly. Make sure we see media changes
* regardless.
* -- Integrate with generic cdrom driver.
* -- CDROMGETSPINDOWN and CDROMSETSPINDOWN ioctls, based on
* a patch from Ciro Cattuto <>.
* -- Call set_device_ro.
* -- Implement CDROMMECHANISMSTATUS and CDROMSLOTTABLE
* ioctls, based on patch by Erik Andersen
* -- Add some probes of drive capability during setup.
*
* 4.01 Nov 11, 1996 -- Split into ide-cd.c and ide-cd.h
* -- Removed CDROMMECHANISMSTATUS and CDROMSLOTTABLE
* ioctls in favor of a generalized approach
* using the generic cdrom driver.
* -- Fully integrated with the 2.1.X kernel.
* -- Other stuff that I forgot (lots of changes)
*
* 4.02 Dec 01, 1996 -- Applied patch from Gadi Oxman <gadio@netvision.net.il>
* to fix the drive door locking problems.
*
* 4.03 Dec 04, 1996 -- Added DSC overlap support.
* 4.04 Dec 29, 1996 -- Added CDROMREADRAW ioclt based on patch
* by Ales Makarov (xmakarov@sun.felk.cvut.cz)
*
* 4.05 Nov 20, 1997 -- Modified to print more drive info on init
* Minor other changes
* Fix errors on CDROMSTOP (If you have a "Dolphin",
* you must define IHAVEADOLPHIN)
* Added identifier so new Sanyo CD-changer works
* Better detection if door locking isn't supported
*
* 4.06 Dec 17, 1997 -- fixed endless "tray open" messages -ml
* 4.07 Dec 17, 1997 -- fallback to set pc->stat on "tray open"
* 4.08 Dec 18, 1997 -- spew less noise when tray is empty
* -- fix speed display for ACER 24X, 18X
* 4.09 Jan 04, 1998 -- fix handling of the last block so we return
* an end of file instead of an I/O error (Gadi)
* 4.10 Jan 24, 1998 -- fixed a bug so now changers can change to a new
* slot when there is no disc in the current slot.
* -- Fixed a memory leak where info->changer_info was
* malloc'ed but never free'd when closing the device.
* -- Cleaned up the global namespace a bit by making more
* functions static that should already have been.
* 4.11 Mar 12, 1998 -- Added support for the CDROM_SELECT_SPEED ioctl
* based on a patch for 2.0.33 by Jelle Foks
* <jelle@scintilla.utwente.nl>, a patch for 2.0.33
* by Toni Giorgino <toni@pcape2.pi.infn.it>, the SCSI
* version, and my own efforts. -erik
* -- Fixed a stupid bug which egcs was kind enough to
* inform me of where "Illegal mode for this track"
* was never returned due to a comparison on data
* types of limited range.
* 4.12 Mar 29, 1998 -- Fixed bug in CDROM_SELECT_SPEED so write speed is
* now set ionly for CD-R and CD-RW drives. I had
* removed this support because it produced errors.
* It produced errors _only_ for non-writers. duh.
* 4.13 May 05, 1998 -- Suppress useless "in progress of becoming ready"
* messages, since this is not an error.
* -- Change error messages to be const
* -- Remove a "\t" which looks ugly in the syslogs
* 4.14 July 17, 1998 -- Change to pointing to .ps version of ATAPI spec
* since the .pdf version doesn't seem to work...
* -- Updated the TODO list to something more current.
*
* 4.15 Aug 25, 1998 -- Updated ide-cd.h to respect mechine endianess,
* patch thanks to "Eddie C. Dost" <ecd@skynet.be>
*
* 4.50 Oct 19, 1998 -- New maintainers!
* Jens Axboe <axboe@image.dk>
* Chris Zwilling <chris@cloudnet.com>
*
* 4.51 Dec 23, 1998 -- Jens Axboe <axboe@image.dk>
* - ide_cdrom_reset enabled since the ide subsystem
* handles resets fine now. <axboe@image.dk>
* - Transfer size fix for Samsung CD-ROMs, thanks to
* "Ville Hallik" <ville.hallik@mail.ee>.
* - other minor stuff.
*
* 4.52 Jan 19, 1999 -- Jens Axboe <axboe@image.dk>
* - Detect DVD-ROM/RAM drives
*
* 4.53 Feb 22, 1999 - Include other model Samsung and one Goldstar
* drive in transfer size limit.
* - Fix the I/O error when doing eject without a medium
* loaded on some drives.
* - CDROMREADMODE2 is now implemented through
* CDROMREADRAW, since many drives don't support
* MODE2 (even though ATAPI 2.6 says they must).
* - Added ignore parameter to ide-cd (as a module), eg
* insmod ide-cd ignore='hda hdb'
* Useful when using ide-cd in conjunction with
* ide-scsi. TODO: non-modular way of doing the
* same.
*
* 4.54 Aug 5, 1999 - Support for MMC2 class commands through the generic
* packet interface to cdrom.c.
* - Unified audio ioctl support, most of it.
* - cleaned up various deprecated verify_area().
* - Added ide_cdrom_packet() as the interface for
* the Uniform generic_packet().
* - bunch of other stuff, will fill in logs later.
* - report 1 slot for non-changers, like the other
* cd-rom drivers. don't report select disc for
* non-changers as well.
* - mask out audio playing, if the device can't do it.
*
* 4.55 Sep 1, 1999 - Eliminated the rest of the audio ioctls, except
* for CDROMREADTOC[ENTRY|HEADER]. Some of the drivers
* use this independently of the actual audio handling.
* They will disappear later when I get the time to
* do it cleanly.
* - Minimize the TOC reading - only do it when we
* know a media change has occurred.
* - Moved all the CDROMREADx ioctls to the Uniform layer.
* - Heiko Eissfeldt <heiko@colossus.escape.de> supplied
* some fixes for CDI.
* - CD-ROM leaving door locked fix from Andries
* Brouwer <Andries.Brouwer@cwi.nl>
* - Erik Andersen <andersen@xmission.com> unified
* commands across the various drivers and how
* sense errors are handled.
*
* 4.56 Sep 12, 1999 - Removed changer support - it is now in the
* Uniform layer.
* - Added partition based multisession handling.
* - Mode sense and mode select moved to the
* Uniform layer.
* - Fixed a problem with WPI CDS-32X drive - it
* failed the capabilities
*
* 4.57 Apr 7, 2000 - Fixed sense reporting.
* - Fixed possible oops in ide_cdrom_get_last_session()
* - Fix locking mania and make ide_cdrom_reset relock
* - Stop spewing errors to log when magicdev polls with
* TEST_UNIT_READY on some drives.
* - Various fixes from Tobias Ringstrom:
* tray if it was locked prior to the reset.
* - cdrom_read_capacity returns one frame too little.
* - Fix real capacity reporting.
*
* 4.58 May 1, 2000 - Clean up ACER50 stuff.
* - Fix small problem with ide_cdrom_capacity
*
* 4.59 Aug 11, 2000 - Fix changer problem in cdrom_read_toc, we weren't
* correctly sensing a disc change.
* - Rearranged some code
* - Use extended sense on drives that support it for
* correctly reporting tray status -- from
* Michael D Johnson <johnsom@orst.edu>
* 4.60 Dec 17, 2003 - Add mt rainier support
* - Bump timeout for packet commands, matches sr
* - Odd stuff
* 4.61 Jan 22, 2004 - support hardware sector sizes other than 2kB,
* Pascal Schmidt <der.eremit@email.de>
*
*************************************************************************/
#define IDECD_VERSION "4.61"
#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 <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/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 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)
kref_get(&cd->kref);
mutex_unlock(&idecd_ref_mutex);
return cd;
}
static void ide_cd_release(struct kref *);
static void ide_cd_put(struct cdrom_info *cd)
{
mutex_lock(&idecd_ref_mutex);
kref_put(&cd->kref, ide_cd_release);
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)
{
struct cdrom_info *info = drive->driver_data;
CDROM_STATE_FLAGS (drive)->media_changed = 1;
CDROM_STATE_FLAGS (drive)->toc_valid = 0;
info->nsectors_buffered = 0;
}
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;
unsigned long valid;
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;
if (sense->error_code == 0x70) { /* Current Error */
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]);
bio_sectors = bio_sectors(failed_command->bio);
if (bio_sectors < 4)
bio_sectors = 4;
if (drive->queue->hardsect_size == 2048)
sector <<= 2; /* Device sector size is 2K */
sector &= ~(bio_sectors -1);
valid = (sector - failed_command->sector) << 9;
if (valid < 0)
valid = 0;
if (sector < get_capacity(info->disk) &&
drive->probed_capacity - sector < 4 * 75) {
set_capacity(info->disk, sector);
}
}
}
#if VERBOSE_IDE_CD_ERRORS
{
int i;
const char *s = "bad sense key!";
char buf[80];
printk ("ATAPI device %s:\n", drive->name);
if (sense->error_code==0x70)
printk(" Error: ");
else if (sense->error_code==0x71)
printk(" Deferred Error: ");
else if (sense->error_code == 0x7f)
printk(" Vendor-specific Error: ");
else
printk(" Unknown Error Type: ");
if (sense->sense_key < ARRAY_SIZE(sense_key_texts))
s = sense_key_texts[sense->sense_key];
printk("%s -- (Sense key=0x%02x)\n", s, sense->sense_key);
if (sense->asc == 0x40) {
sprintf(buf, "Diagnostic failure on component 0x%02x",
sense->ascq);
s = buf;
} else {
int lo = 0, mid, hi = ARRAY_SIZE(sense_data_texts);
unsigned long key = (sense->sense_key << 16);
key |= (sense->asc << 8);
if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd))
key |= sense->ascq;
s = NULL;
while (hi > lo) {
mid = (lo + hi) / 2;
if (sense_data_texts[mid].asc_ascq == key ||
sense_data_texts[mid].asc_ascq == (0xff0000|key)) {
s = sense_data_texts[mid].text;
break;
}
else if (sense_data_texts[mid].asc_ascq > key)
hi = mid;
else
lo = mid+1;
}
}
if (s == NULL) {
if (sense->asc > 0x80)
s = "(vendor-specific error)";
else
s = "(reserved error code)";
}
printk(KERN_ERR " %s -- (asc=0x%02x, ascq=0x%02x)\n",
s, sense->asc, sense->ascq);
if (failed_command != NULL) {
int lo=0, mid, hi= ARRAY_SIZE(packet_command_texts);
s = NULL;
while (hi > lo) {
mid = (lo + hi) / 2;
if (packet_command_texts[mid].packet_command ==
failed_command->cmd[0]) {
s = packet_command_texts[mid].text;
break;
}
if (packet_command_texts[mid].packet_command >
failed_command->cmd[0])
hi = mid;
else
lo = mid+1;
}
printk (KERN_ERR " The failed \"%s\" packet command was: \n \"", s);
for (i=0; i<sizeof (failed_command->cmd); i++)
printk ("%02x ", failed_command->cmd[i]);
printk ("\"\n");
}
/* The SKSV bit specifies validity of the sense_key_specific
* in the next two commands. It is bit 7 of the first byte.
* In the case of NOT_READY, if SKSV is set the drive can
* give us nice ETA readings.
*/
if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) {
int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100;
printk(KERN_ERR " Command is %02d%% complete\n", progress / 0xffff);
}
if (sense->sense_key == ILLEGAL_REQUEST &&
(sense->sks[0] & 0x80) != 0) {
printk(KERN_ERR " Error in %s byte %d",
(sense->sks[0] & 0x40) != 0 ?
"command packet" : "command data",
(sense->sks[1] << 8) + sense->sks[2]);
if ((sense->sks[0] & 0x40) != 0)
printk (" bit %d", sense->sks[0] & 0x07);
printk ("\n");
}
}
#else /* not VERBOSE_IDE_CD_ERRORS */
/* Suppress printing unit attention and `in progress of becoming ready'
errors when we're not being verbose. */
if (sense->sense_key == UNIT_ATTENTION ||
(sense->sense_key == NOT_READY && (sense->asc == 4 ||
sense->asc == 0x3a)))
return;
printk(KERN_ERR "%s: error code: 0x%02x sense_key: 0x%02x asc: 0x%02x ascq: 0x%02x\n",
drive->name,
sense->error_code, sense->sense_key,
sense->asc, sense->ascq);
#endif /* not VERBOSE_IDE_CD_ERRORS */
}
/*
* Initialize a ide-cd packet command request
*/
static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *cd = drive->driver_data;
ide_init_drive_cmd(rq);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->rq_disk = cd->disk;
}
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 */
cdrom_prepare_request(drive, rq);
rq->data = sense;
rq->cmd[0] = GPCMD_REQUEST_SENSE;
rq->cmd[4] = rq->data_len = 18;
rq->cmd_type = REQ_TYPE_SENSE;
/* NOTE! Save the failed command in "rq->buffer" */
rq->buffer = (void *) failed_command;
(void) ide_do_drive_cmd(drive, rq, ide_preempt);
}
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 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);
end_that_request_chunk(failed, 0,
failed->data_len);
end_that_request_last(failed, 0);
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 stat)
{
if (stat & 0x80)
return;
ide_dump_status(drive, msg, stat);
}
/* Returns 0 if the request should be continued.
Returns 1 if the request was ended. */
static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
{
struct request *rq = HWGROUP(drive)->rq;
int stat, err, sense_key;
/* Check for errors. */
stat = HWIF(drive)->INB(IDE_STATUS_REG);
if (stat_ret)
*stat_ret = stat;
if (OK_STAT(stat, good_stat, BAD_R_STAT))
return 0;
/* Get the IDE error register. */
err = HWIF(drive)->INB(IDE_ERROR_REG);
sense_key = err >> 4;
if (rq == NULL) {
printk("%s: missing rq in cdrom_decode_status\n", drive->name);
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. */
unsigned long flags;
/*
* 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);
/*printk("%s: media changed\n",drive->name);*/
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
*/
if (stat & ERR_STAT) {
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);
} 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 ("%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) {
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);
} else {
/* 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;
}
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)
{
ide_startstop_t startstop;
struct cdrom_info *info = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
/* Wait for the controller to be idle. */
if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
return startstop;
if (info->dma)
info->dma = !hwif->dma_setup(drive);
/* Set up the controller registers. */
/* FIXME: for Virtual DMA we must check harder */
HWIF(drive)->OUTB(info->dma, IDE_FEATURE_REG);
HWIF(drive)->OUTB(0, IDE_IREASON_REG);
HWIF(drive)->OUTB(0, IDE_SECTOR_REG);
HWIF(drive)->OUTB(xferlen & 0xff, IDE_BCOUNTL_REG);
HWIF(drive)->OUTB(xferlen >> 8 , IDE_BCOUNTH_REG);
if (IDE_CONTROL_REG)
HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
if (CDROM_CONFIG_FLAGS (drive)->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 {
unsigned long flags;
/* packet command */
spin_lock_irqsave(&ide_lock, flags);
hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG);
ndelay(400);
spin_unlock_irqrestore(&ide_lock, flags);
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. */
/*
* changed 5 parameters to 3 for dvd-ram
* struct packet_command *pc; now packet_command_t *pc;
*/
#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 (CDROM_CONFIG_FLAGS(drive)->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. */