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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018, Linaro Ltd.
* Author: Georgi Djakov <georgi.djakov@linaro.org>
*/
#ifndef _LINUX_INTERCONNECT_PROVIDER_H
#define _LINUX_INTERCONNECT_PROVIDER_H
#include <linux/interconnect.h>
struct icc_node;
/**
* struct icc_provider - interconnect provider (controller) entity that might
* provide multiple interconnect controls
*
* @provider_list: list of the registered interconnect providers
* @nodes: internal list of the interconnect provider nodes
* @set: pointer to device specific set operation function
* @aggregate: pointer to device specific aggregate operation function
* @dev: the device this interconnect provider belongs to
* @lock: lock to provide consistency during aggregation/update of constraints
* @users: count of active users
* @data: pointer to private data
*/
struct icc_provider {
struct list_head provider_list;
struct list_head nodes;
int (*set)(struct icc_node *src, struct icc_node *dst,
u32 avg_bw, u32 peak_bw);
int (*aggregate)(struct icc_node *node, u32 avg_bw, u32 peak_bw,
u32 *agg_avg, u32 *agg_peak);
struct device *dev;
struct mutex lock;
int users;
void *data;
};
/**
* struct icc_node - entity that is part of the interconnect topology
*
* @id: platform specific node id
* @name: node name used in debugfs
* @links: a list of targets where we can go next when traversing
* @num_links: number of links to other interconnect nodes
* @provider: points to the interconnect provider of this node
* @node_list: list of interconnect nodes associated with @provider
* @search_list: list used when walking the nodes graph
* @reverse: pointer to previous node when walking the nodes graph
* @is_traversed: flag that is used when walking the nodes graph
* @req_list: a list of QoS constraint requests associated with this node
* @avg_bw: aggregated value of average bandwidth
* @peak_bw: aggregated value of peak bandwidth
* @data: pointer to private data
*/
struct icc_node {
int id;
const char *name;
struct icc_node **links;
size_t num_links;
struct icc_provider *provider;
struct list_head node_list;
struct list_head orphan_list;
struct list_head search_list;
struct icc_node *reverse;
bool is_traversed;
struct hlist_head req_list;
u32 avg_bw;
u32 peak_bw;
void *data;
};
#if IS_ENABLED(CONFIG_INTERCONNECT)
struct icc_node *icc_node_create(int id);
int icc_node_add(struct icc_node *node, struct icc_provider *provider);
int icc_link_create(struct icc_node *node, const int dst_id);
int icc_provider_add(struct icc_provider *provider);
int icc_provider_del(struct icc_provider *provider);
#else
static inline struct icc_node *icc_node_create(int id)
{
return ERR_PTR(-ENOTSUPP);
}
int icc_node_add(struct icc_node *node, struct icc_provider *provider)
{
return -ENOTSUPP;
}
static inline int icc_link_create(struct icc_node *node, const int dst_id)
{
return -ENOTSUPP;
}
static inline int icc_provider_add(struct icc_provider *provider)
{
return -ENOTSUPP;
}
static inline int icc_provider_del(struct icc_provider *provider)
{
return -ENOTSUPP;
}
#endif /* CONFIG_INTERCONNECT */
#endif /* _LINUX_INTERCONNECT_PROVIDER_H */
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