diff options
Diffstat (limited to 'drivers/s390/char/tape_class.h')
| -rw-r--r-- | drivers/s390/char/tape_class.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/s390/char/tape_class.h b/drivers/s390/char/tape_class.h new file mode 100644 index 000000000..d25ac075b --- /dev/null +++ b/drivers/s390/char/tape_class.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 2004 All Rights Reserved. + * + * Tape class device support + * + * Author: Stefan Bader <shbader@de.ibm.com> + * Based on simple class device code by Greg K-H + */ +#ifndef __TAPE_CLASS_H__ +#define __TAPE_CLASS_H__ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/major.h> +#include <linux/cdev.h> + +#include <linux/device.h> +#include <linux/kdev_t.h> + +#define TAPECLASS_NAME_LEN 32 + +struct tape_class_device { + struct cdev *char_device; + struct device *class_device; + char device_name[TAPECLASS_NAME_LEN]; + char mode_name[TAPECLASS_NAME_LEN]; +}; + +/* + * Register a tape device and return a pointer to the tape class device + * created by the call. + * + * device + * The pointer to the struct device of the physical (base) device. + * dev + * The intended major/minor number. The major number may be 0 to + * get a dynamic major number. + * fops + * The pointer to the drivers file operations for the tape device. + * device_name + * Pointer to the logical device name (will also be used as kobject name + * of the cdev). This can also be called the name of the tape class + * device. + * mode_name + * Points to the name of the tape mode. This creates a link with that + * name from the physical device to the logical device (class). + */ +struct tape_class_device *register_tape_dev( + struct device * device, + dev_t dev, + const struct file_operations *fops, + char * device_name, + char * node_name +); +void unregister_tape_dev(struct device *device, struct tape_class_device *tcd); + +#endif /* __TAPE_CLASS_H__ */ |