1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2018-2019, Linaro Ltd.
4 * Author: Georgi Djakov <georgi.djakov@linaro.org>
5 */
6
7 #ifndef __LINUX_INTERCONNECT_H
8 #define __LINUX_INTERCONNECT_H
9
10 #include <linux/mutex.h>
11 #include <linux/types.h>
12
13 /* macros for converting to icc units */
14 #define Bps_to_icc(x) ((x) / 1000)
15 #define kBps_to_icc(x) (x)
16 #define MBps_to_icc(x) ((x) * 1000)
17 #define GBps_to_icc(x) ((x) * 1000 * 1000)
18 #define bps_to_icc(x) (1)
19 #define kbps_to_icc(x) ((x) / 8 + ((x) % 8 ? 1 : 0))
20 #define Mbps_to_icc(x) ((x) * 1000 / 8)
21 #define Gbps_to_icc(x) ((x) * 1000 * 1000 / 8)
22
23 struct icc_path;
24 struct device;
25
26 /**
27 * struct icc_bulk_data - Data used for bulk icc operations.
28 *
29 * @path: reference to the interconnect path (internal use)
30 * @name: the name from the "interconnect-names" DT property
31 * @avg_bw: average bandwidth in icc units
32 * @peak_bw: peak bandwidth in icc units
33 */
34 struct icc_bulk_data {
35 struct icc_path *path;
36 const char *name;
37 u32 avg_bw;
38 u32 peak_bw;
39 };
40
41 int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
42 struct icc_bulk_data *paths);
43 void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
44 int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
45 int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
46 void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
47
48 #if IS_ENABLED(CONFIG_INTERCONNECT)
49
50 struct icc_path *icc_get(struct device *dev, const int src_id,
51 const int dst_id);
52 struct icc_path *of_icc_get(struct device *dev, const char *name);
53 struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
54 struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
55 void icc_put(struct icc_path *path);
56 int icc_enable(struct icc_path *path);
57 int icc_disable(struct icc_path *path);
58 int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
59 void icc_set_tag(struct icc_path *path, u32 tag);
60 const char *icc_get_name(struct icc_path *path);
61
62 #else
63
icc_get(struct device * dev,const int src_id,const int dst_id)64 static inline struct icc_path *icc_get(struct device *dev, const int src_id,
65 const int dst_id)
66 {
67 return NULL;
68 }
69
of_icc_get(struct device * dev,const char * name)70 static inline struct icc_path *of_icc_get(struct device *dev,
71 const char *name)
72 {
73 return NULL;
74 }
75
devm_of_icc_get(struct device * dev,const char * name)76 static inline struct icc_path *devm_of_icc_get(struct device *dev,
77 const char *name)
78 {
79 return NULL;
80 }
81
of_icc_get_by_index(struct device * dev,int idx)82 static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
83 {
84 return NULL;
85 }
86
icc_put(struct icc_path * path)87 static inline void icc_put(struct icc_path *path)
88 {
89 }
90
icc_enable(struct icc_path * path)91 static inline int icc_enable(struct icc_path *path)
92 {
93 return 0;
94 }
95
icc_disable(struct icc_path * path)96 static inline int icc_disable(struct icc_path *path)
97 {
98 return 0;
99 }
100
icc_set_bw(struct icc_path * path,u32 avg_bw,u32 peak_bw)101 static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
102 {
103 return 0;
104 }
105
icc_set_tag(struct icc_path * path,u32 tag)106 static inline void icc_set_tag(struct icc_path *path, u32 tag)
107 {
108 }
109
icc_get_name(struct icc_path * path)110 static inline const char *icc_get_name(struct icc_path *path)
111 {
112 return NULL;
113 }
114
115 #endif /* CONFIG_INTERCONNECT */
116
117 #endif /* __LINUX_INTERCONNECT_H */
118