1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef __PSTORE_BLK_H_
4 #define __PSTORE_BLK_H_
5 
6 #include <linux/types.h>
7 #include <linux/pstore.h>
8 #include <linux/pstore_zone.h>
9 
10 /**
11  * struct pstore_device_info - back-end pstore/blk driver structure.
12  *
13  * @flags:	Refer to macro starting with PSTORE_FLAGS defined in
14  *		linux/pstore.h. It means what front-ends this device support.
15  *		Zero means all backends for compatible.
16  * @zone:	The struct pstore_zone_info details.
17  *
18  */
19 struct pstore_device_info {
20 	unsigned int flags;
21 	struct pstore_zone_info zone;
22 };
23 
24 int  register_pstore_device(struct pstore_device_info *dev);
25 void unregister_pstore_device(struct pstore_device_info *dev);
26 
27 /**
28  * struct pstore_blk_config - the pstore_blk backend configuration
29  *
30  * @device:		Name of the desired block device
31  * @max_reason:		Maximum kmsg dump reason to store to block device
32  * @kmsg_size:		Total size of for kmsg dumps
33  * @pmsg_size:		Total size of the pmsg storage area
34  * @console_size:	Total size of the console storage area
35  * @ftrace_size:	Total size for ftrace logging data (for all CPUs)
36  */
37 struct pstore_blk_config {
38 	char device[80];
39 	enum kmsg_dump_reason max_reason;
40 	unsigned long kmsg_size;
41 	unsigned long pmsg_size;
42 	unsigned long console_size;
43 	unsigned long ftrace_size;
44 };
45 
46 /**
47  * pstore_blk_get_config - get a copy of the pstore_blk backend configuration
48  *
49  * @info:	The sturct pstore_blk_config to be filled in
50  *
51  * Failure returns negative error code, and success returns 0.
52  */
53 int pstore_blk_get_config(struct pstore_blk_config *info);
54 
55 #endif
56