diff options
author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-17 18:09:14 +0200 |
---|---|---|
committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-17 18:09:14 +0200 |
commit | 806f80a6fc203ad0bde84e5a9e94572617d2ae45 (patch) | |
tree | 20c684323e6e9f24af96df84008f06425a67ec6a /drivers/ide/ide-gd.c | |
parent | 79cb380397c834a35952d8497651d93b543ef968 (diff) | |
download | kernel_samsung_smdk4412-806f80a6fc203ad0bde84e5a9e94572617d2ae45.zip kernel_samsung_smdk4412-806f80a6fc203ad0bde84e5a9e94572617d2ae45.tar.gz kernel_samsung_smdk4412-806f80a6fc203ad0bde84e5a9e94572617d2ae45.tar.bz2 |
ide: add generic ATA/ATAPI disk driver
* Add struct ide_disk_ops containing protocol specific methods.
* Add 'struct ide_disk_ops *' to ide_drive_t.
* Convert ide-{disk,floppy} drivers to use struct ide_disk_ops.
* Merge ide-{disk,floppy} drivers into generic ide-gd driver.
While at it:
- ide_disk_init_capacity() -> ide_disk_get_capacity()
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-gd.c')
-rw-r--r-- | drivers/ide/ide-gd.c | 122 |
1 files changed, 104 insertions, 18 deletions
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c index a3d4ad7..d44898f 100644 --- a/drivers/ide/ide-gd.c +++ b/drivers/ide/ide-gd.c @@ -15,9 +15,14 @@ #endif #include "ide-disk.h" +#include "ide-floppy.h" #define IDE_GD_VERSION "1.18" +/* module parameters */ +static unsigned long debug_mask; +module_param(debug_mask, ulong, 0644); + static DEFINE_MUTEX(ide_disk_ref_mutex); static void ide_disk_release(struct kref *); @@ -64,7 +69,7 @@ static void ide_gd_remove(ide_drive_t *drive) del_gendisk(g); - ide_disk_flush(drive); + drive->disk_ops->flush(drive); ide_disk_put(idkp); } @@ -75,6 +80,7 @@ static void ide_disk_release(struct kref *kref) ide_drive_t *drive = idkp->drive; struct gendisk *g = idkp->disk; + drive->disk_ops = NULL; drive->driver_data = NULL; g->private_data = NULL; put_disk(g); @@ -89,7 +95,7 @@ static void ide_disk_release(struct kref *kref) static void ide_gd_resume(ide_drive_t *drive) { if (ata_id_hpa_enabled(drive->id)) - ide_disk_init_capacity(drive); + (void)drive->disk_ops->get_capacity(drive); } static void ide_gd_shutdown(ide_drive_t *drive) @@ -110,7 +116,7 @@ static void ide_gd_shutdown(ide_drive_t *drive) #else if (system_state == SYSTEM_RESTART) { #endif - ide_disk_flush(drive); + drive->disk_ops->flush(drive); return; } @@ -122,19 +128,31 @@ static void ide_gd_shutdown(ide_drive_t *drive) #ifdef CONFIG_IDE_PROC_FS static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive) { - return ide_disk_proc; + return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc; } static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive) { - return ide_disk_settings; + return (drive->media == ide_disk) ? ide_disk_settings + : ide_floppy_settings; } #endif +static ide_startstop_t ide_gd_do_request(ide_drive_t *drive, + struct request *rq, sector_t sector) +{ + return drive->disk_ops->do_request(drive, rq, sector); +} + +static int ide_gd_end_request(ide_drive_t *drive, int uptodate, int nrsecs) +{ + return drive->disk_ops->end_request(drive, uptodate, nrsecs); +} + static ide_driver_t ide_gd_driver = { .gen_driver = { .owner = THIS_MODULE, - .name = "ide-disk", + .name = "ide-gd", .bus = &ide_bus_type, }, .probe = ide_gd_probe, @@ -142,8 +160,8 @@ static ide_driver_t ide_gd_driver = { .resume = ide_gd_resume, .shutdown = ide_gd_shutdown, .version = IDE_GD_VERSION, - .do_request = ide_do_rw_disk, - .end_request = ide_end_request, + .do_request = ide_gd_do_request, + .end_request = ide_gd_end_request, .error = __ide_error, #ifdef CONFIG_IDE_PROC_FS .proc_entries = ide_disk_proc_entries, @@ -156,6 +174,7 @@ 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; + int ret = 0; idkp = ide_disk_get(disk); if (idkp == NULL) @@ -163,19 +182,49 @@ static int ide_gd_open(struct inode *inode, struct file *filp) drive = idkp->drive; + ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); + idkp->openers++; if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { + drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; + /* Just in case */ + + ret = drive->disk_ops->init_media(drive, disk); + + /* + * Allow O_NDELAY to open a drive without a disk, or with an + * unreadable disk, so that we can get the format capacity + * of the drive or begin the format - Sam + */ + if (ret && (filp->f_flags & O_NDELAY) == 0) { + ret = -EIO; + goto out_put_idkp; + } + + if ((drive->dev_flags & IDE_DFLAG_WP) && (filp->f_mode & 2)) { + ret = -EROFS; + goto out_put_idkp; + } + /* * 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); + drive->disk_ops->set_doorlock(drive, disk, 1); drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; check_disk_change(inode->i_bdev); + } else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) { + ret = -EBUSY; + goto out_put_idkp; } return 0; + +out_put_idkp: + idkp->openers--; + ide_disk_put(idkp); + return ret; } static int ide_gd_release(struct inode *inode, struct file *filp) @@ -184,11 +233,15 @@ static int ide_gd_release(struct inode *inode, struct file *filp) struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); ide_drive_t *drive = idkp->drive; + ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); + if (idkp->openers == 1) - ide_disk_flush(drive); + drive->disk_ops->flush(drive); - if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) - ide_disk_set_doorlock(drive, 0); + if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { + drive->disk_ops->set_doorlock(drive, disk, 0); + drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; + } idkp->openers--; @@ -233,11 +286,21 @@ static int ide_gd_revalidate_disk(struct gendisk *disk) return 0; } +static int ide_gd_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct block_device *bdev = inode->i_bdev; + struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); + ide_drive_t *drive = idkp->drive; + + return drive->disk_ops->ioctl(drive, inode, file, cmd, arg); +} + static struct block_device_operations ide_gd_ops = { .owner = THIS_MODULE, .open = ide_gd_open, .release = ide_gd_release, - .ioctl = ide_disk_ioctl, + .ioctl = ide_gd_ioctl, .getgeo = ide_gd_getgeo, .media_changed = ide_gd_media_changed, .revalidate_disk = ide_gd_revalidate_disk @@ -245,19 +308,37 @@ static struct block_device_operations ide_gd_ops = { static int ide_gd_probe(ide_drive_t *drive) { + const struct ide_disk_ops *disk_ops = NULL; struct ide_disk_obj *idkp; struct gendisk *g; /* strstr("foo", "") is non-NULL */ - if (!strstr("ide-disk", drive->driver_req)) + if (!strstr("ide-gd", drive->driver_req)) + goto failed; + +#ifdef CONFIG_IDE_GD_ATA + if (drive->media == ide_disk) + disk_ops = &ide_ata_disk_ops; +#endif +#ifdef CONFIG_IDE_GD_ATAPI + if (drive->media == ide_floppy) + disk_ops = &ide_atapi_disk_ops; +#endif + if (disk_ops == NULL) goto failed; - if (drive->media != ide_disk) + if (disk_ops->check(drive, DRV_NAME) == 0) { + printk(KERN_ERR PFX "%s: not supported by this driver\n", + drive->name); goto failed; + } idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); - if (!idkp) + if (!idkp) { + printk(KERN_ERR PFX "%s: can't allocate a disk structure\n", + drive->name); goto failed; + } g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif)); if (!g) @@ -274,8 +355,10 @@ static int ide_gd_probe(ide_drive_t *drive) g->private_data = &idkp->driver; drive->driver_data = idkp; + drive->debug_mask = debug_mask; + drive->disk_ops = disk_ops; - ide_disk_setup(drive); + disk_ops->setup(drive); set_capacity(g, ide_gd_capacity(drive)); @@ -296,6 +379,7 @@ failed: static int __init ide_gd_init(void) { + printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n"); return driver_register(&ide_gd_driver.gen_driver); } @@ -306,7 +390,9 @@ static void __exit ide_gd_exit(void) MODULE_ALIAS("ide:*m-disk*"); MODULE_ALIAS("ide-disk"); +MODULE_ALIAS("ide:*m-floppy*"); +MODULE_ALIAS("ide-floppy"); module_init(ide_gd_init); module_exit(ide_gd_exit); MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("ATA DISK Driver"); +MODULE_DESCRIPTION("generic ATA/ATAPI disk driver"); |