| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192 |
- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * Copyright © 2003-2010 David Woodhouse <[email protected]>
- */
- #ifndef __MTD_TRANS_H__
- #define __MTD_TRANS_H__
- #include <linux/mutex.h>
- #include <linux/kref.h>
- #include <linux/sysfs.h>
- struct hd_geometry;
- struct mtd_info;
- struct mtd_blktrans_ops;
- struct file;
- struct inode;
- struct mtd_blktrans_dev {
- struct mtd_blktrans_ops *tr;
- struct list_head list;
- struct mtd_info *mtd;
- struct mutex lock;
- int devnum;
- bool bg_stop;
- unsigned long size;
- int readonly;
- int open;
- struct kref ref;
- struct gendisk *disk;
- struct attribute_group *disk_attributes;
- struct request_queue *rq;
- struct list_head rq_list;
- struct blk_mq_tag_set *tag_set;
- spinlock_t queue_lock;
- void *priv;
- fmode_t file_mode;
- };
- struct mtd_blktrans_ops {
- char *name;
- int major;
- int part_bits;
- int blksize;
- int blkshift;
- /* Access functions */
- int (*readsect)(struct mtd_blktrans_dev *dev,
- unsigned long block, char *buffer);
- int (*writesect)(struct mtd_blktrans_dev *dev,
- unsigned long block, char *buffer);
- int (*discard)(struct mtd_blktrans_dev *dev,
- unsigned long block, unsigned nr_blocks);
- void (*background)(struct mtd_blktrans_dev *dev);
- /* Block layer ioctls */
- int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
- int (*flush)(struct mtd_blktrans_dev *dev);
- /* Called with mtd_table_mutex held; no race with add/remove */
- int (*open)(struct mtd_blktrans_dev *dev);
- void (*release)(struct mtd_blktrans_dev *dev);
- /* Called on {de,}registration and on subsequent addition/removal
- of devices, with mtd_table_mutex held. */
- void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
- void (*remove_dev)(struct mtd_blktrans_dev *dev);
- struct list_head devs;
- struct list_head list;
- struct module *owner;
- };
- extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
- extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
- extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
- extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
- extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev);
- /**
- * module_mtd_blktrans() - Helper macro for registering a mtd blktrans driver
- * @__mtd_blktrans: mtd_blktrans_ops struct
- *
- * Helper macro for mtd blktrans drivers which do not do anything special in
- * module init/exit. This eliminates a lot of boilerplate. Each module may only
- * use this macro once, and calling it replaces module_init() and module_exit()
- */
- #define module_mtd_blktrans(__mtd_blktrans) \
- module_driver(__mtd_blktrans, register_mtd_blktrans, \
- deregister_mtd_blktrans)
- #endif /* __MTD_TRANS_H__ */
|
