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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
23struct icc_path;
24struct 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 */
34struct icc_bulk_data {
35 struct icc_path *path;
36 const char *name;
37 u32 avg_bw;
38 u32 peak_bw;
39};
40
41#if IS_ENABLED(CONFIG_INTERCONNECT)
42
43struct icc_path *icc_get(struct device *dev, const int src_id,
44 const int dst_id);
45struct icc_path *of_icc_get(struct device *dev, const char *name);
46struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
47struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
48void icc_put(struct icc_path *path);
49int icc_enable(struct icc_path *path);
50int icc_disable(struct icc_path *path);
51int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
52void icc_set_tag(struct icc_path *path, u32 tag);
53const char *icc_get_name(struct icc_path *path);
54int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
55 struct icc_bulk_data *paths);
56void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
57int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
58int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
59void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
60
61#else
62
63static inline struct icc_path *icc_get(struct device *dev, const int src_id,
64 const int dst_id)
65{
66 return NULL;
67}
68
69static inline struct icc_path *of_icc_get(struct device *dev,
70 const char *name)
71{
72 return NULL;
73}
74
75static inline struct icc_path *devm_of_icc_get(struct device *dev,
76 const char *name)
77{
78 return NULL;
79}
80
81static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
82{
83 return NULL;
84}
85
86static inline void icc_put(struct icc_path *path)
87{
88}
89
90static inline int icc_enable(struct icc_path *path)
91{
92 return 0;
93}
94
95static inline int icc_disable(struct icc_path *path)
96{
97 return 0;
98}
99
100static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
101{
102 return 0;
103}
104
105static inline void icc_set_tag(struct icc_path *path, u32 tag)
106{
107}
108
109static inline const char *icc_get_name(struct icc_path *path)
110{
111 return NULL;
112}
113
114static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
115{
116 return 0;
117}
118
119static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
120{
121}
122
123static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
124{
125 return 0;
126}
127
128static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
129{
130 return 0;
131}
132
133static inline void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
134{
135}
136
137#endif /* CONFIG_INTERCONNECT */
138
139#endif /* __LINUX_INTERCONNECT_H */