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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
472 lines
11 KiB
C
472 lines
11 KiB
C
/*
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* cdrom.c IOCTLs handling for ide-cd 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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*/
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#include <linux/kernel.h>
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#include <linux/cdrom.h>
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#include <linux/gfp.h>
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#include <linux/ide.h>
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#include <scsi/scsi.h>
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#include "ide-cd.h"
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/****************************************************************************
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* Other driver requests (open, close, check media change).
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*/
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int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
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{
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return 0;
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}
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/*
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* Close down the device. Invalidate all cached blocks.
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*/
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void ide_cdrom_release_real(struct cdrom_device_info *cdi)
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{
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ide_drive_t *drive = cdi->handle;
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if (!cdi->use_count)
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drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
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}
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/*
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* add logic to try GET_EVENT command first to check for media and tray
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* status. this should be supported by newer cd-r/w and all DVD etc
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* drives
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*/
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int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
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{
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ide_drive_t *drive = cdi->handle;
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struct media_event_desc med;
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struct request_sense sense;
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int stat;
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if (slot_nr != CDSL_CURRENT)
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return -EINVAL;
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stat = cdrom_check_status(drive, &sense);
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if (!stat || sense.sense_key == UNIT_ATTENTION)
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return CDS_DISC_OK;
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if (!cdrom_get_media_event(cdi, &med)) {
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if (med.media_present)
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return CDS_DISC_OK;
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else if (med.door_open)
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return CDS_TRAY_OPEN;
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else
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return CDS_NO_DISC;
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}
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if (sense.sense_key == NOT_READY && sense.asc == 0x04
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&& sense.ascq == 0x04)
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return CDS_DISC_OK;
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/*
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* If not using Mt Fuji extended media tray reports,
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* just return TRAY_OPEN since ATAPI doesn't provide
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* any other way to detect this...
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*/
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if (sense.sense_key == NOT_READY) {
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if (sense.asc == 0x3a && sense.ascq == 1)
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return CDS_NO_DISC;
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else
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return CDS_TRAY_OPEN;
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}
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return CDS_DRIVE_NOT_READY;
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}
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int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
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int slot_nr)
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{
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ide_drive_t *drive = cdi->handle;
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int retval;
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if (slot_nr == CDSL_CURRENT) {
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(void) cdrom_check_status(drive, NULL);
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retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
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drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
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return retval;
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} else {
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return -EINVAL;
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}
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}
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/* Eject the disk if EJECTFLAG is 0.
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If EJECTFLAG is 1, try to reload the disk. */
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static
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int cdrom_eject(ide_drive_t *drive, int ejectflag,
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struct request_sense *sense)
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{
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struct cdrom_info *cd = drive->driver_data;
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struct cdrom_device_info *cdi = &cd->devinfo;
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char loej = 0x02;
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unsigned char cmd[BLK_MAX_CDB];
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if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
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return -EDRIVE_CANT_DO_THIS;
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/* reload fails on some drives, if the tray is locked */
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if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
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return 0;
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/* only tell drive to close tray if open, if it can do that */
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if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
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loej = 0;
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_START_STOP_UNIT;
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cmd[4] = loej | (ejectflag != 0);
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return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
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}
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/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
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static
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int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
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struct request_sense *sense)
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{
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struct request_sense my_sense;
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int stat;
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if (sense == NULL)
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sense = &my_sense;
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/* If the drive cannot lock the door, just pretend. */
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if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
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stat = 0;
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} else {
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unsigned char cmd[BLK_MAX_CDB];
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
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cmd[4] = lockflag ? 1 : 0;
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stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
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sense, 0, 0);
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}
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/* If we got an illegal field error, the drive
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probably cannot lock the door. */
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if (stat != 0 &&
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sense->sense_key == ILLEGAL_REQUEST &&
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(sense->asc == 0x24 || sense->asc == 0x20)) {
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printk(KERN_ERR "%s: door locking not supported\n",
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drive->name);
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drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
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stat = 0;
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}
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/* no medium, that's alright. */
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if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
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stat = 0;
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if (stat == 0) {
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if (lockflag)
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drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
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else
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drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
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}
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return stat;
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}
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int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
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{
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ide_drive_t *drive = cdi->handle;
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struct request_sense sense;
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if (position) {
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int stat = ide_cd_lockdoor(drive, 0, &sense);
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if (stat)
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return stat;
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}
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return cdrom_eject(drive, !position, &sense);
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}
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int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
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{
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ide_drive_t *drive = cdi->handle;
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return ide_cd_lockdoor(drive, lock, NULL);
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}
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/*
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* ATAPI devices are free to select the speed you request or any slower
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* rate. :-( Requesting too fast a speed will _not_ produce an error.
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*/
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int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
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{
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *cd = drive->driver_data;
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struct request_sense sense;
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u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
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int stat;
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unsigned char cmd[BLK_MAX_CDB];
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if (speed == 0)
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speed = 0xffff; /* set to max */
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else
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speed *= 177; /* Nx to kbytes/s */
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_SET_SPEED;
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/* Read Drive speed in kbytes/second MSB/LSB */
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cmd[2] = (speed >> 8) & 0xff;
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cmd[3] = speed & 0xff;
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if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
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(CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
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/* Write Drive speed in kbytes/second MSB/LSB */
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cmd[4] = (speed >> 8) & 0xff;
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cmd[5] = speed & 0xff;
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}
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stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
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if (!ide_cdrom_get_capabilities(drive, buf)) {
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ide_cdrom_update_speed(drive, buf);
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cdi->speed = cd->current_speed;
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}
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return 0;
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}
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int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
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struct cdrom_multisession *ms_info)
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{
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struct atapi_toc *toc;
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *info = drive->driver_data;
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struct request_sense sense;
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int ret;
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if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
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ret = ide_cd_read_toc(drive, &sense);
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if (ret)
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return ret;
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}
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toc = info->toc;
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ms_info->addr.lba = toc->last_session_lba;
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ms_info->xa_flag = toc->xa_flag;
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return 0;
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}
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int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
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struct cdrom_mcn *mcn_info)
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{
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ide_drive_t *drive = cdi->handle;
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int stat, mcnlen;
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char buf[24];
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unsigned char cmd[BLK_MAX_CDB];
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unsigned len = sizeof(buf);
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_READ_SUBCHANNEL;
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cmd[1] = 2; /* MSF addressing */
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cmd[2] = 0x40; /* request subQ data */
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cmd[3] = 2; /* format */
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cmd[8] = len;
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stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
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if (stat)
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return stat;
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mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
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memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
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mcn_info->medium_catalog_number[mcnlen] = '\0';
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return 0;
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}
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int ide_cdrom_reset(struct cdrom_device_info *cdi)
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{
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *cd = drive->driver_data;
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struct request_sense sense;
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struct request *rq;
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int ret;
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_SPECIAL;
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rq->cmd_flags = REQ_QUIET;
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ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
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blk_put_request(rq);
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/*
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* A reset will unlock the door. If it was previously locked,
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* lock it again.
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*/
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if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
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(void)ide_cd_lockdoor(drive, 1, &sense);
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return ret;
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}
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static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
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struct atapi_toc_entry **ent)
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{
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struct cdrom_info *info = drive->driver_data;
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struct atapi_toc *toc = info->toc;
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int ntracks;
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/*
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* don't serve cached data, if the toc isn't valid
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*/
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if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
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return -EINVAL;
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/* Check validity of requested track number. */
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ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
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if (toc->hdr.first_track == CDROM_LEADOUT)
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ntracks = 0;
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if (track == CDROM_LEADOUT)
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*ent = &toc->ent[ntracks];
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else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
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return -EINVAL;
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else
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*ent = &toc->ent[track - toc->hdr.first_track];
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return 0;
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}
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static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
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{
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struct cdrom_ti *ti = arg;
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struct atapi_toc_entry *first_toc, *last_toc;
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unsigned long lba_start, lba_end;
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int stat;
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struct request_sense sense;
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unsigned char cmd[BLK_MAX_CDB];
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stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
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if (stat)
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return stat;
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stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
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if (stat)
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return stat;
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if (ti->cdti_trk1 != CDROM_LEADOUT)
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++last_toc;
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lba_start = first_toc->addr.lba;
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lba_end = last_toc->addr.lba;
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if (lba_end <= lba_start)
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return -EINVAL;
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_PLAY_AUDIO_MSF;
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lba_to_msf(lba_start, &cmd[3], &cmd[4], &cmd[5]);
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lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
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return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
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}
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static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
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{
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struct cdrom_info *cd = drive->driver_data;
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struct cdrom_tochdr *tochdr = arg;
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struct atapi_toc *toc;
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int stat;
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/* Make sure our saved TOC is valid. */
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stat = ide_cd_read_toc(drive, NULL);
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if (stat)
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return stat;
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toc = cd->toc;
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tochdr->cdth_trk0 = toc->hdr.first_track;
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tochdr->cdth_trk1 = toc->hdr.last_track;
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return 0;
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}
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static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
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{
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struct cdrom_tocentry *tocentry = arg;
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struct atapi_toc_entry *toce;
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int stat;
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stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
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if (stat)
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return stat;
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tocentry->cdte_ctrl = toce->control;
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tocentry->cdte_adr = toce->adr;
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if (tocentry->cdte_format == CDROM_MSF) {
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lba_to_msf(toce->addr.lba,
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&tocentry->cdte_addr.msf.minute,
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&tocentry->cdte_addr.msf.second,
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&tocentry->cdte_addr.msf.frame);
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} else
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tocentry->cdte_addr.lba = toce->addr.lba;
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return 0;
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}
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int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
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unsigned int cmd, void *arg)
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{
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ide_drive_t *drive = cdi->handle;
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switch (cmd) {
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/*
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* emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
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* atapi doesn't support it
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*/
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case CDROMPLAYTRKIND:
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return ide_cd_fake_play_trkind(drive, arg);
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case CDROMREADTOCHDR:
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return ide_cd_read_tochdr(drive, arg);
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case CDROMREADTOCENTRY:
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return ide_cd_read_tocentry(drive, arg);
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default:
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return -EINVAL;
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}
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}
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/* the generic packet interface to cdrom.c */
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int ide_cdrom_packet(struct cdrom_device_info *cdi,
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struct packet_command *cgc)
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{
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ide_drive_t *drive = cdi->handle;
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unsigned int flags = 0;
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unsigned len = cgc->buflen;
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if (cgc->timeout <= 0)
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|
cgc->timeout = ATAPI_WAIT_PC;
|
|
|
|
/* here we queue the commands from the uniform CD-ROM
|
|
layer. the packet must be complete, as we do not
|
|
touch it at all. */
|
|
|
|
if (cgc->data_direction == CGC_DATA_WRITE)
|
|
flags |= REQ_RW;
|
|
|
|
if (cgc->sense)
|
|
memset(cgc->sense, 0, sizeof(struct request_sense));
|
|
|
|
if (cgc->quiet)
|
|
flags |= REQ_QUIET;
|
|
|
|
cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
|
|
cgc->data_direction == CGC_DATA_WRITE,
|
|
cgc->buffer, &len,
|
|
cgc->sense, cgc->timeout, flags);
|
|
if (!cgc->stat)
|
|
cgc->buflen -= len;
|
|
return cgc->stat;
|
|
}
|