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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
26struct icc_path;
27struct 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 */
37struct 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
46struct icc_path *of_icc_get(struct device *dev, const char *name);
47struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
48int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths);
49struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
50void icc_put(struct icc_path *path);
51int icc_enable(struct icc_path *path);
52int icc_disable(struct icc_path *path);
53int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
54void icc_set_tag(struct icc_path *path, u32 tag);
55const char *icc_get_name(struct icc_path *path);
56int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
57 struct icc_bulk_data *paths);
58void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
59int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
60int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
61void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
62
63#else
64
65static inline struct icc_path *of_icc_get(struct device *dev,
66 const char *name)
67{
68 return NULL;
69}
70
71static inline struct icc_path *devm_of_icc_get(struct device *dev,
72 const char *name)
73{
74 return NULL;
75}
76
77static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
78{
79 return NULL;
80}
81
82static inline void icc_put(struct icc_path *path)
83{
84}
85
86static inline int icc_enable(struct icc_path *path)
87{
88 return 0;
89}
90
91static inline int icc_disable(struct icc_path *path)
92{
93 return 0;
94}
95
96static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
97{
98 return 0;
99}
100
101static inline void icc_set_tag(struct icc_path *path, u32 tag)
102{
103}
104
105static inline const char *icc_get_name(struct icc_path *path)
106{
107 return NULL;
108}
109
110static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
111{
112 return 0;
113}
114
115static 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
121static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
122{
123}
124
125static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
126{
127 return 0;
128}
129
130static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
131{
132 return 0;
133}
134
135static 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 */