include/linux/interconnect.h

   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 */