Quellcode-Bibliothek interconnect.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018-2019, Linaro Ltd.
* Author: Georgi Djakov <georgi.djakov@linaro.org>
*/

#ifndef __LINUX_INTERCONNECT_H
#define __LINUX_INTERCONNECT_H

#include <linux/mutex.h>
#include <linux/types.h>

/* macros for converting to icc units */
#define Bps_to_icc(x) ((x) / 1000)
#define kBps_to_icc(x) (x)
#define MBps_to_icc(x) ((x) * 1000)
#define GBps_to_icc(x) ((x) * 1000 * 1000)
#define bps_to_icc(x) (1)
#define kbps_to_icc(x) ((x) / 8 + ((x) % 8 ? 1 : 0))
#define Mbps_to_icc(x) ((x) * 1000 / 8)
#define Gbps_to_icc(x) ((x) * 1000 * 1000 / 8)

/* macro to indicate dynamic id allocation */
#define ICC_ALLOC_DYN_ID -1

struct icc_path;
struct device;

/**
* struct icc_bulk_data - Data used for bulk icc operations.
*
* @path: reference to the interconnect path (internal use)
* @name: the name from the "interconnect-names" DT property
* @avg_bw: average bandwidth in icc units
* @peak_bw: peak bandwidth in icc units
*/
struct icc_bulk_data {
struct icc_path *path;
const char *name;
u32 avg_bw;
u32 peak_bw;
};

#if IS_ENABLED(CONFIG_INTERCONNECT)

struct icc_path *of_icc_get(struct device *dev, const char *name);
struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths);
struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
void icc_put(struct icc_path *path);
int icc_enable(struct icc_path *path);
int icc_disable(struct icc_path *path);
int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
void icc_set_tag(struct icc_path *path, u32 tag);
const char *icc_get_name(struct icc_path *path);
int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
     struct icc_bulk_data *paths);
void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);

#else

static inline struct icc_path *of_icc_get(struct device *dev,
       const char *name)
{
return NULL;
}

static inline struct icc_path *devm_of_icc_get(struct device *dev,
      const char *name)
{
return NULL;
}

static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
{
return NULL;
}

static inline void icc_put(struct icc_path *path)
{
}

static inline int icc_enable(struct icc_path *path)
{
return 0;
}

static inline int icc_disable(struct icc_path *path)
{
return 0;
}

static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
{
return 0;
}

static inline void icc_set_tag(struct icc_path *path, u32 tag)
{
}

static inline const char *icc_get_name(struct icc_path *path)
{
return NULL;
}

static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
{
return 0;
}

static inline int devm_of_icc_bulk_get(struct device *dev, int num_paths,
           struct icc_bulk_data *paths)
{
return 0;
}

static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
{
}

static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
{
return 0;
}

static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
{
return 0;
}

static inline void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
{
}

#endif /* CONFIG_INTERCONNECT */

#endif /* __LINUX_INTERCONNECT_H */

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