* This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
*/
-#define IDEDISK_VERSION "1.18"
-
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/div64.h>
-#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
-#define IDE_DISK_MINORS (1 << PARTN_BITS)
-#else
-#define IDE_DISK_MINORS 0
-#endif
-
#include "ide-disk.h"
-static DEFINE_MUTEX(idedisk_ref_mutex);
-
-static void ide_disk_release(struct kref *);
-
-static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
-{
- struct ide_disk_obj *idkp = NULL;
-
- mutex_lock(&idedisk_ref_mutex);
- idkp = ide_drv_g(disk, ide_disk_obj);
- if (idkp) {
- if (ide_device_get(idkp->drive))
- idkp = NULL;
- else
- kref_get(&idkp->kref);
- }
- mutex_unlock(&idedisk_ref_mutex);
- return idkp;
-}
-
-static void ide_disk_put(struct ide_disk_obj *idkp)
-{
- ide_drive_t *drive = idkp->drive;
-
- mutex_lock(&idedisk_ref_mutex);
- kref_put(&idkp->kref, ide_disk_release);
- ide_device_put(drive);
- mutex_unlock(&idedisk_ref_mutex);
-}
-
static const u8 ide_rw_cmds[] = {
ATA_CMD_READ_MULTI,
ATA_CMD_WRITE_MULTI,
* 1073741822 == 549756 MB or 48bit addressing fake drive
*/
-static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
- sector_t block)
+ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
+ sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
}
}
-static void init_idedisk_capacity(ide_drive_t *drive)
+void ide_disk_init_capacity(ide_drive_t *drive)
{
u16 *id = drive->id;
int lba;
}
}
-sector_t ide_disk_capacity(ide_drive_t *drive)
-{
- return drive->capacity64;
-}
-
static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
{
ide_drive_t *drive = q->queuedata;
* time we have trimmed the drive capacity if LBA48 is
* not available so we don't need to recheck that.
*/
- capacity = ide_disk_capacity(drive);
+ capacity = ide_gd_capacity(drive);
barrier = ata_id_flush_enabled(id) &&
(drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
ide_ext_devset_rw_sync(nowerr, nowerr);
-static void idedisk_setup(ide_drive_t *drive)
+void ide_disk_setup(ide_drive_t *drive)
{
struct ide_disk_obj *idkp = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
drive->queue->max_sectors / 2);
/* calculate drive capacity, and select LBA if possible */
- init_idedisk_capacity(drive);
+ ide_disk_init_capacity(drive);
/*
* if possible, give fdisk access to more of the drive,
* by correcting bios_cyls:
*/
- capacity = ide_disk_capacity(drive);
+ capacity = ide_gd_capacity(drive);
if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
if (ata_id_lba48_enabled(drive->id)) {
drive->dev_flags |= IDE_DFLAG_ATTACH;
}
-static void ide_cacheflush_p(ide_drive_t *drive)
+void ide_disk_flush(ide_drive_t *drive)
{
if (ata_id_flush_enabled(drive->id) == 0 ||
(drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
}
-static void ide_disk_remove(ide_drive_t *drive)
-{
- struct ide_disk_obj *idkp = drive->driver_data;
- struct gendisk *g = idkp->disk;
-
- ide_proc_unregister_driver(drive, idkp->driver);
-
- del_gendisk(g);
-
- ide_cacheflush_p(drive);
-
- ide_disk_put(idkp);
-}
-
-static void ide_disk_release(struct kref *kref)
-{
- struct ide_disk_obj *idkp = to_ide_drv(kref, ide_disk_obj);
- ide_drive_t *drive = idkp->drive;
- struct gendisk *g = idkp->disk;
-
- drive->driver_data = NULL;
- g->private_data = NULL;
- put_disk(g);
- kfree(idkp);
-}
-
-static int ide_disk_probe(ide_drive_t *drive);
-
-/*
- * On HPA drives the capacity needs to be
- * reinitilized on resume otherwise the disk
- * can not be used and a hard reset is required
- */
-static void ide_disk_resume(ide_drive_t *drive)
-{
- if (ata_id_hpa_enabled(drive->id))
- init_idedisk_capacity(drive);
-}
-
-static void ide_device_shutdown(ide_drive_t *drive)
-{
-#ifdef CONFIG_ALPHA
- /* On Alpha, halt(8) doesn't actually turn the machine off,
- it puts you into the sort of firmware monitor. Typically,
- it's used to boot another kernel image, so it's not much
- different from reboot(8). Therefore, we don't need to
- spin down the disk in this case, especially since Alpha
- firmware doesn't handle disks in standby mode properly.
- On the other hand, it's reasonably safe to turn the power
- off when the shutdown process reaches the firmware prompt,
- as the firmware initialization takes rather long time -
- at least 10 seconds, which should be sufficient for
- the disk to expire its write cache. */
- if (system_state != SYSTEM_POWER_OFF) {
-#else
- if (system_state == SYSTEM_RESTART) {
-#endif
- ide_cacheflush_p(drive);
- return;
- }
-
- printk(KERN_INFO "Shutdown: %s\n", drive->name);
-
- drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
-}
-
-static ide_driver_t idedisk_driver = {
- .gen_driver = {
- .owner = THIS_MODULE,
- .name = "ide-disk",
- .bus = &ide_bus_type,
- },
- .probe = ide_disk_probe,
- .remove = ide_disk_remove,
- .resume = ide_disk_resume,
- .shutdown = ide_device_shutdown,
- .version = IDEDISK_VERSION,
- .do_request = ide_do_rw_disk,
- .end_request = ide_end_request,
- .error = __ide_error,
-#ifdef CONFIG_IDE_PROC_FS
- .proc = ide_disk_proc,
- .settings = ide_disk_settings,
-#endif
-};
-
-static int idedisk_set_doorlock(ide_drive_t *drive, int on)
+int ide_disk_set_doorlock(ide_drive_t *drive, int on)
{
ide_task_t task;
int ret;
return ret;
}
-
-static int idedisk_open(struct inode *inode, struct file *filp)
-{
- struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ide_disk_obj *idkp;
- ide_drive_t *drive;
-
- idkp = ide_disk_get(disk);
- if (idkp == NULL)
- return -ENXIO;
-
- drive = idkp->drive;
-
- idkp->openers++;
-
- if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
- /*
- * Ignore the return code from door_lock,
- * since the open() has already succeeded,
- * and the door_lock is irrelevant at this point.
- */
- idedisk_set_doorlock(drive, 1);
- check_disk_change(inode->i_bdev);
- }
- return 0;
-}
-
-static int idedisk_release(struct inode *inode, struct file *filp)
-{
- struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
- ide_drive_t *drive = idkp->drive;
-
- if (idkp->openers == 1)
- ide_cacheflush_p(drive);
-
- if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1)
- idedisk_set_doorlock(drive, 0);
-
- idkp->openers--;
-
- ide_disk_put(idkp);
-
- return 0;
-}
-
-static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
- struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
- ide_drive_t *drive = idkp->drive;
-
- geo->heads = drive->bios_head;
- geo->sectors = drive->bios_sect;
- geo->cylinders = (u16)drive->bios_cyl; /* truncate */
- return 0;
-}
-
-static int idedisk_media_changed(struct gendisk *disk)
-{
- struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
- ide_drive_t *drive = idkp->drive;
-
- /* do not scan partitions twice if this is a removable device */
- if (drive->dev_flags & IDE_DFLAG_ATTACH) {
- drive->dev_flags &= ~IDE_DFLAG_ATTACH;
- return 0;
- }
-
- /* if removable, always assume it was changed */
- return !!(drive->dev_flags & IDE_DFLAG_REMOVABLE);
-}
-
-static int idedisk_revalidate_disk(struct gendisk *disk)
-{
- struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
- set_capacity(disk, ide_disk_capacity(idkp->drive));
- return 0;
-}
-
-static struct block_device_operations idedisk_ops = {
- .owner = THIS_MODULE,
- .open = idedisk_open,
- .release = idedisk_release,
- .ioctl = ide_disk_ioctl,
- .getgeo = idedisk_getgeo,
- .media_changed = idedisk_media_changed,
- .revalidate_disk = idedisk_revalidate_disk
-};
-
-MODULE_DESCRIPTION("ATA DISK Driver");
-
-static int ide_disk_probe(ide_drive_t *drive)
-{
- struct ide_disk_obj *idkp;
- struct gendisk *g;
-
- /* strstr("foo", "") is non-NULL */
- if (!strstr("ide-disk", drive->driver_req))
- goto failed;
-
- if (drive->media != ide_disk)
- goto failed;
-
- idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
- if (!idkp)
- goto failed;
-
- g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
- if (!g)
- goto out_free_idkp;
-
- ide_init_disk(g, drive);
-
- kref_init(&idkp->kref);
-
- idkp->drive = drive;
- idkp->driver = &idedisk_driver;
- idkp->disk = g;
-
- g->private_data = &idkp->driver;
-
- drive->driver_data = idkp;
-
- idedisk_setup(drive);
-
- set_capacity(g, ide_disk_capacity(drive));
-
- g->minors = IDE_DISK_MINORS;
- g->driverfs_dev = &drive->gendev;
- g->flags |= GENHD_FL_EXT_DEVT;
- if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
- g->flags = GENHD_FL_REMOVABLE;
- g->fops = &idedisk_ops;
- add_disk(g);
- return 0;
-
-out_free_idkp:
- kfree(idkp);
-failed:
- return -ENODEV;
-}
-
-static void __exit idedisk_exit(void)
-{
- driver_unregister(&idedisk_driver.gen_driver);
-}
-
-static int __init idedisk_init(void)
-{
- return driver_register(&idedisk_driver.gen_driver);
-}
-
-MODULE_ALIAS("ide:*m-disk*");
-MODULE_ALIAS("ide-disk");
-module_init(idedisk_init);
-module_exit(idedisk_exit);
-MODULE_LICENSE("GPL");
projects / linux-2.6-omap-h63xx.git / blobdiff