xref: /openbmc/linux/block/blk-mq-debugfs.h (revision 5b4cb650) 
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef INT_BLK_MQ_DEBUGFS_H
3 #define INT_BLK_MQ_DEBUGFS_H
4 
5 #ifdef CONFIG_BLK_DEBUG_FS
6 
7 #include <linux/seq_file.h>
8 
9 struct blk_mq_debugfs_attr {
10 	const char *name;
11 	umode_t mode;
12 	int (*show)(void *, struct seq_file *);
13 	ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
14 	/* Set either .show or .seq_ops. */
15 	const struct seq_operations *seq_ops;
16 };
17 
18 int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
19 int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
20 
21 int blk_mq_debugfs_register(struct request_queue *q);
22 void blk_mq_debugfs_unregister(struct request_queue *q);
23 int blk_mq_debugfs_register_hctx(struct request_queue *q,
24 				 struct blk_mq_hw_ctx *hctx);
25 void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
26 int blk_mq_debugfs_register_hctxs(struct request_queue *q);
27 void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
28 
29 int blk_mq_debugfs_register_sched(struct request_queue *q);
30 void blk_mq_debugfs_unregister_sched(struct request_queue *q);
31 int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
32 				       struct blk_mq_hw_ctx *hctx);
33 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
34 
35 int blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
36 void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
37 void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q);
38 #else
39 static inline int blk_mq_debugfs_register(struct request_queue *q)
40 {
41 	return 0;
42 }
43 
44 static inline void blk_mq_debugfs_unregister(struct request_queue *q)
45 {
46 }
47 
48 static inline int blk_mq_debugfs_register_hctx(struct request_queue *q,
49 					       struct blk_mq_hw_ctx *hctx)
50 {
51 	return 0;
52 }
53 
54 static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
55 {
56 }
57 
58 static inline int blk_mq_debugfs_register_hctxs(struct request_queue *q)
59 {
60 	return 0;
61 }
62 
63 static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
64 {
65 }
66 
67 static inline int blk_mq_debugfs_register_sched(struct request_queue *q)
68 {
69 	return 0;
70 }
71 
72 static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
73 {
74 }
75 
76 static inline int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
77 						     struct blk_mq_hw_ctx *hctx)
78 {
79 	return 0;
80 }
81 
82 static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
83 {
84 }
85 
86 static inline int blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
87 {
88 	return 0;
89 }
90 
91 static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
92 {
93 }
94 
95 static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
96 {
97 }
98 #endif
99 
100 #ifdef CONFIG_BLK_DEBUG_FS_ZONED
101 int queue_zone_wlock_show(void *data, struct seq_file *m);
102 #else
103 static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
104 {
105 	return 0;
106 }
107 #endif
108 
109 #endif
110