cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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interconnect.h (3436B)

      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 */