| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #ifndef __MTD_TRANS_H__ |
| 7 | #define __MTD_TRANS_H__ |
| 8 | |
| 9 | #include <linux/mutex.h> |
| 10 | #include <linux/kref.h> |
| 11 | #include <linux/sysfs.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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; |
| 23 | struct mutex lock; |
| 24 | int devnum; |
| 25 | bool bg_stop; |
| 26 | unsigned long size; |
| 27 | int readonly; |
| 28 | int open; |
| 29 | struct kref ref; |
| 30 | struct gendisk *disk; |
| 31 | struct attribute_group *disk_attributes; |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 32 | struct request_queue *rq; |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 33 | struct list_head rq_list; |
| 34 | struct blk_mq_tag_set *tag_set; |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 35 | spinlock_t queue_lock; |
| 36 | void *priv; |
| 37 | fmode_t file_mode; |
| 38 | }; |
| 39 | |
| 40 | struct mtd_blktrans_ops { |
| 41 | char *name; |
| 42 | int major; |
| 43 | int part_bits; |
| 44 | int blksize; |
| 45 | int blkshift; |
| 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); |
| 52 | int (*discard)(struct mtd_blktrans_dev *dev, |
| 53 | unsigned long block, unsigned nr_blocks); |
| 54 | void (*background)(struct mtd_blktrans_dev *dev); |
| 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); |
| 62 | void (*release)(struct mtd_blktrans_dev *dev); |
| 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; |
| 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); |
| 78 | extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); |
| 79 | |
| 80 | |
| 81 | #endif /* __MTD_TRANS_H__ */ |