| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #ifndef __MTD_TRANS_H__ |
| 21 | #define __MTD_TRANS_H__ |
| 22 | |
| 23 | #include <linux/mutex.h> |
| 24 | #include <linux/kref.h> |
| 25 | #include <linux/sysfs.h> |
| 26 | #include <linux/workqueue.h> |
| 27 | |
| 28 | struct hd_geometry; |
| 29 | struct mtd_info; |
| 30 | struct mtd_blktrans_ops; |
| 31 | struct file; |
| 32 | struct inode; |
| 33 | |
| 34 | struct mtd_blktrans_dev { |
| 35 | struct mtd_blktrans_ops *tr; |
| 36 | struct list_head list; |
| 37 | struct mtd_info *mtd; |
| 38 | struct mutex lock; |
| 39 | int devnum; |
| 40 | bool bg_stop; |
| 41 | unsigned long size; |
| 42 | int readonly; |
| 43 | int open; |
| 44 | struct kref ref; |
| 45 | struct gendisk *disk; |
| 46 | struct attribute_group *disk_attributes; |
| 47 | struct workqueue_struct *wq; |
| 48 | struct work_struct work; |
| 49 | struct request_queue *rq; |
| 50 | spinlock_t queue_lock; |
| 51 | void *priv; |
| 52 | fmode_t file_mode; |
| 53 | }; |
| 54 | |
| 55 | struct mtd_blktrans_ops { |
| 56 | char *name; |
| 57 | int major; |
| 58 | int part_bits; |
| 59 | int blksize; |
| 60 | int blkshift; |
| 61 | |
| 62 | /* Access functions */ |
| 63 | int (*readsect)(struct mtd_blktrans_dev *dev, |
| 64 | unsigned long block, char *buffer); |
| 65 | int (*writesect)(struct mtd_blktrans_dev *dev, |
| 66 | unsigned long block, char *buffer); |
| 67 | int (*discard)(struct mtd_blktrans_dev *dev, |
| 68 | unsigned long block, unsigned nr_blocks); |
| 69 | void (*background)(struct mtd_blktrans_dev *dev); |
| 70 | |
| 71 | /* Block layer ioctls */ |
| 72 | int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo); |
| 73 | int (*flush)(struct mtd_blktrans_dev *dev); |
| 74 | |
| 75 | /* Called with mtd_table_mutex held; no race with add/remove */ |
| 76 | int (*open)(struct mtd_blktrans_dev *dev); |
| 77 | void (*release)(struct mtd_blktrans_dev *dev); |
| 78 | |
| 79 | /* Called on {de,}registration and on subsequent addition/removal |
| 80 | of devices, with mtd_table_mutex held. */ |
| 81 | void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd); |
| 82 | void (*remove_dev)(struct mtd_blktrans_dev *dev); |
| 83 | |
| 84 | struct list_head devs; |
| 85 | struct list_head list; |
| 86 | struct module *owner; |
| 87 | }; |
| 88 | |
| 89 | extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr); |
| 90 | extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr); |
| 91 | extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); |
| 92 | extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); |
| 93 | extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); |
| 94 | |
| 95 | |
| 96 | #endif /* __MTD_TRANS_H__ */ |