From 5fef0e5c0283949f95a7891c9424a9f84448116b Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Fri, 17 Oct 2008 18:09:12 +0200 Subject: ide-disk: factor out generic disk handling code to ide-gd.c While at it: - IDEDISK_VERSION -> IDE_GD_VERSION - ide_cacheflush_p() -> ide_disk_flush() - init_idedisk_capacity() -> ide_disk_init_capacity() - idedisk_set_doorlock() -> ide_disk_set_doorlock() - idedisk_setup() -> ide_disk_setup() - ide_disk_capacity() -> ide_gd_capacity() - ide_disk_remove() -> ide_gd_remove() - ide_disk_probe() -> ide_gd_probe() - ide_disk_resume() -> ide_gd_resume() - ide_device_shutdown() -> ide_gd_shutdown() - idedisk_driver -> ide_gd_driver - idedisk_open() -> ide_gd_open() - idedisk_release() -> ide_gd_release() - idedisk_getgeo() -> ide_gd_getgeo() - idedisk_media_changed() -> ide_gd_media_changed() - idedisk_revalidate_disk() -> ide_gd_revalidate_disk() - idedisk_ops -> ide_gd_ops - idedisk_init() -> ide_gd_init() - idedisk_exit() -> ide_gd_exit() There should be no functional changes caused by this patch. Acked-by: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-gd.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 296 insertions(+) create mode 100644 drivers/ide/ide-gd.c (limited to 'drivers/ide/ide-gd.c') diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c new file mode 100644 index 000000000000..84bbcfee9233 --- /dev/null +++ b/drivers/ide/ide-gd.c @@ -0,0 +1,296 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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" + +#define IDE_GD_VERSION "1.18" + +static DEFINE_MUTEX(ide_disk_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(&ide_disk_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(&ide_disk_ref_mutex); + return idkp; +} + +static void ide_disk_put(struct ide_disk_obj *idkp) +{ + ide_drive_t *drive = idkp->drive; + + mutex_lock(&ide_disk_ref_mutex); + kref_put(&idkp->kref, ide_disk_release); + ide_device_put(drive); + mutex_unlock(&ide_disk_ref_mutex); +} + +sector_t ide_gd_capacity(ide_drive_t *drive) +{ + return drive->capacity64; +} + +static int ide_gd_probe(ide_drive_t *); + +static void ide_gd_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_disk_flush(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); +} + +/* + * 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_gd_resume(ide_drive_t *drive) +{ + if (ata_id_hpa_enabled(drive->id)) + ide_disk_init_capacity(drive); +} + +static void ide_gd_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_disk_flush(drive); + return; + } + + printk(KERN_INFO "Shutdown: %s\n", drive->name); + + drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); +} + +static ide_driver_t ide_gd_driver = { + .gen_driver = { + .owner = THIS_MODULE, + .name = "ide-disk", + .bus = &ide_bus_type, + }, + .probe = ide_gd_probe, + .remove = ide_gd_remove, + .resume = ide_gd_resume, + .shutdown = ide_gd_shutdown, + .version = IDE_GD_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 ide_gd_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. + */ + ide_disk_set_doorlock(drive, 1); + check_disk_change(inode->i_bdev); + } + return 0; +} + +static int ide_gd_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_disk_flush(drive); + + if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) + ide_disk_set_doorlock(drive, 0); + + idkp->openers--; + + ide_disk_put(idkp); + + return 0; +} + +static int ide_gd_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 ide_gd_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 ide_gd_revalidate_disk(struct gendisk *disk) +{ + struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); + set_capacity(disk, ide_gd_capacity(idkp->drive)); + return 0; +} + +static struct block_device_operations ide_gd_ops = { + .owner = THIS_MODULE, + .open = ide_gd_open, + .release = ide_gd_release, + .ioctl = ide_disk_ioctl, + .getgeo = ide_gd_getgeo, + .media_changed = ide_gd_media_changed, + .revalidate_disk = ide_gd_revalidate_disk +}; + +static int ide_gd_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 = &ide_gd_driver; + idkp->disk = g; + + g->private_data = &idkp->driver; + + drive->driver_data = idkp; + + ide_disk_setup(drive); + + set_capacity(g, ide_gd_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 = &ide_gd_ops; + add_disk(g); + return 0; + +out_free_idkp: + kfree(idkp); +failed: + return -ENODEV; +} + +static int __init ide_gd_init(void) +{ + return driver_register(&ide_gd_driver.gen_driver); +} + +static void __exit ide_gd_exit(void) +{ + driver_unregister(&ide_gd_driver.gen_driver); +} + +MODULE_ALIAS("ide:*m-disk*"); +MODULE_ALIAS("ide-disk"); +module_init(ide_gd_init); +module_exit(ide_gd_exit); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("ATA DISK Driver"); -- cgit v1.2.2