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