projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fd534e9b | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 1da177e4 | 2 | /* |
| a1452a37 | 3 | * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org> |
| 1da177e4 LT |
4 | */ |
| 5 | ||
| 6 | #ifndef __MTD_TRANS_H__ | |
| 7 | #define __MTD_TRANS_H__ | |
| 8 | ||
| 48b19268 | 9 | #include <linux/mutex.h> |
| 048d8719 | 10 | #include <linux/kref.h> |
| 026ec578 | 11 | #include <linux/sysfs.h> |
| 1da177e4 LT |
12 | |
| 13 | struct hd_geometry; | |
| 14 | struct mtd_info; | |
| 15 | struct mtd_blktrans_ops; | |
| 16 | struct file; | |
| 17 | struct inode; | |
| 18 | ||
| 19 | struct mtd_blktrans_dev { | |
| 20 | struct mtd_blktrans_ops *tr; | |
| 21 | struct list_head list; | |
| 22 | struct mtd_info *mtd; | |
| 48b19268 | 23 | struct mutex lock; |
| 1da177e4 | 24 | int devnum; |
| 7bf7e370 | 25 | bool bg_stop; |
| 1da177e4 LT |
26 | unsigned long size; |
| 27 | int readonly; | |
| 048d8719 ML |
28 | int open; |
| 29 | struct kref ref; | |
| a8638622 | 30 | struct gendisk *disk; |
| 026ec578 | 31 | struct attribute_group *disk_attributes; |
| a8638622 | 32 | struct request_queue *rq; |
| 891b7c5f JA |
33 | struct list_head rq_list; |
| 34 | struct blk_mq_tag_set *tag_set; | |
| a8638622 ML |
35 | spinlock_t queue_lock; |
| 36 | void *priv; | |
| 70d5098a | 37 | fmode_t file_mode; |
| 1da177e4 LT |
38 | }; |
| 39 | ||
| 1da177e4 LT |
40 | struct mtd_blktrans_ops { |
| 41 | char *name; | |
| 42 | int major; | |
| 43 | int part_bits; | |
| 19187672 RP |
44 | int blksize; |
| 45 | int blkshift; | |
| 1da177e4 LT |
46 | |
| 47 | /* Access functions */ | |
| 48 | int (*readsect)(struct mtd_blktrans_dev *dev, | |
| 49 | unsigned long block, char *buffer); | |
| 50 | int (*writesect)(struct mtd_blktrans_dev *dev, | |
| 51 | unsigned long block, char *buffer); | |
| eae9acd1 DW |
52 | int (*discard)(struct mtd_blktrans_dev *dev, |
| 53 | unsigned long block, unsigned nr_blocks); | |
| c7519dbf | 54 | void (*background)(struct mtd_blktrans_dev *dev); |
| 1da177e4 LT |
55 | |
| 56 | /* Block layer ioctls */ | |
| 57 | int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo); | |
| 58 | int (*flush)(struct mtd_blktrans_dev *dev); | |
| 59 | ||
| 60 | /* Called with mtd_table_mutex held; no race with add/remove */ | |
| 61 | int (*open)(struct mtd_blktrans_dev *dev); | |
| a8ca889e | 62 | void (*release)(struct mtd_blktrans_dev *dev); |
| 1da177e4 LT |
63 | |
| 64 | /* Called on {de,}registration and on subsequent addition/removal | |
| 65 | of devices, with mtd_table_mutex held. */ | |
| 66 | void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd); | |
| 67 | void (*remove_dev)(struct mtd_blktrans_dev *dev); | |
| 68 | ||
| 69 | struct list_head devs; | |
| 70 | struct list_head list; | |
| 71 | struct module *owner; | |
| 1da177e4 LT |
72 | }; |
| 73 | ||
| 74 | extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr); | |
| 75 | extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr); | |
| 76 | extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); | |
| 77 | extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); | |
| c7519dbf | 78 | extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); |
| 61ecfa87 | 79 | |
| 1da177e4 LT |
80 | |
| 81 | #endif /* __MTD_TRANS_H__ */ |