Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
41int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
42 struct icc_bulk_data *paths);
43void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
44int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
45int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
46void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
47
48#if IS_ENABLED(CONFIG_INTERCONNECT)
49
50struct icc_path *icc_get(struct device *dev, const int src_id,
51 const int dst_id);
52struct icc_path *of_icc_get(struct device *dev, const char *name);
53struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
54struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
55void icc_put(struct icc_path *path);
56int icc_enable(struct icc_path *path);
57int icc_disable(struct icc_path *path);
58int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
59void icc_set_tag(struct icc_path *path, u32 tag);
60const char *icc_get_name(struct icc_path *path);
61
62#else
63
64static inline struct icc_path *icc_get(struct device *dev, const int src_id,
65 const int dst_id)
66{
67 return NULL;
68}
69
70static inline struct icc_path *of_icc_get(struct device *dev,
71 const char *name)
72{
73 return NULL;
74}
75
76static inline struct icc_path *devm_of_icc_get(struct device *dev,
77 const char *name)
78{
79 return NULL;
80}
81
82static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
83{
84 return NULL;
85}
86
87static inline void icc_put(struct icc_path *path)
88{
89}
90
91static inline int icc_enable(struct icc_path *path)
92{
93 return 0;
94}
95
96static inline int icc_disable(struct icc_path *path)
97{
98 return 0;
99}
100
101static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
102{
103 return 0;
104}
105
106static inline void icc_set_tag(struct icc_path *path, u32 tag)
107{
108}
109
110static 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 */