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 /* macro to indicate dynamic id allocation */
24 #define ICC_ALLOC_DYN_ID -1
25
26 struct icc_path;
27 struct device;
28
29 /**
30 * struct icc_bulk_data - Data used for bulk icc operations.
31 *
32 * @path: reference to the interconnect path (internal use)
33 * @name: the name from the "interconnect-names" DT property
34 * @avg_bw: average bandwidth in icc units
35 * @peak_bw: peak bandwidth in icc units
36 */
37 struct icc_bulk_data {
38 struct icc_path *path;
39 const char *name;
40 u32 avg_bw;
41 u32 peak_bw;
42 };
43
44 #if IS_ENABLED(CONFIG_INTERCONNECT)
45
46 struct icc_path *of_icc_get(struct device *dev, const char *name);
47 struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
48 int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths);
49 struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
50 void icc_put(struct icc_path *path);
51 int icc_enable(struct icc_path *path);
52 int icc_disable(struct icc_path *path);
53 int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
54 void icc_set_tag(struct icc_path *path, u32 tag);
55 const char *icc_get_name(struct icc_path *path);
56 int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
57 struct icc_bulk_data *paths);
58 void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
59 int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
60 int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
61 void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
62
63 #else
64
of_icc_get(struct device * dev,const char * name)65 static inline struct icc_path *of_icc_get(struct device *dev,
66 const char *name)
67 {
68 return NULL;
69 }
70
devm_of_icc_get(struct device * dev,const char * name)71 static inline struct icc_path *devm_of_icc_get(struct device *dev,
72 const char *name)
73 {
74 return NULL;
75 }
76
of_icc_get_by_index(struct device * dev,int idx)77 static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
78 {
79 return NULL;
80 }
81
icc_put(struct icc_path * path)82 static inline void icc_put(struct icc_path *path)
83 {
84 }
85
icc_enable(struct icc_path * path)86 static inline int icc_enable(struct icc_path *path)
87 {
88 return 0;
89 }
90
icc_disable(struct icc_path * path)91 static inline int icc_disable(struct icc_path *path)
92 {
93 return 0;
94 }
95
icc_set_bw(struct icc_path * path,u32 avg_bw,u32 peak_bw)96 static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
97 {
98 return 0;
99 }
100
icc_set_tag(struct icc_path * path,u32 tag)101 static inline void icc_set_tag(struct icc_path *path, u32 tag)
102 {
103 }
104
icc_get_name(struct icc_path * path)105 static inline const char *icc_get_name(struct icc_path *path)
106 {
107 return NULL;
108 }
109
of_icc_bulk_get(struct device * dev,int num_paths,struct icc_bulk_data * paths)110 static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
111 {
112 return 0;
113 }
114
devm_of_icc_bulk_get(struct device * dev,int num_paths,struct icc_bulk_data * paths)115 static inline int devm_of_icc_bulk_get(struct device *dev, int num_paths,
116 struct icc_bulk_data *paths)
117 {
118 return 0;
119 }
120
icc_bulk_put(int num_paths,struct icc_bulk_data * paths)121 static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
122 {
123 }
124
icc_bulk_set_bw(int num_paths,const struct icc_bulk_data * paths)125 static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
126 {
127 return 0;
128 }
129
icc_bulk_enable(int num_paths,const struct icc_bulk_data * paths)130 static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
131 {
132 return 0;
133 }
134
icc_bulk_disable(int num_paths,const struct icc_bulk_data * paths)135 static inline void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
136 {
137 }
138
139 #endif /* CONFIG_INTERCONNECT */
140
141 #endif /* __LINUX_INTERCONNECT_H */
142