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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202/* 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>
#define icc_units_to_bps(bw) ((bw) * 1000ULL)
struct icc_node;struct of_phandle_args;
/** * struct icc_node_data - icc node data * * @node: icc node * @tag: tag */struct icc_node_data { struct icc_node *node; u32 tag;};
/** * struct icc_onecell_data - driver data for onecell interconnect providers * * @num_nodes: number of nodes in this device * @nodes: array of pointers to the nodes in this device */struct icc_onecell_data { unsigned int num_nodes; struct icc_node *nodes[] __counted_by(num_nodes);};
struct icc_node *of_icc_xlate_onecell(const struct of_phandle_args *spec, void *data);
/** * 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 * @pre_aggregate: pointer to device specific function that is called * before the aggregation begins (optional) * @get_bw: pointer to device specific function to get current bandwidth * @xlate: provider-specific callback for mapping nodes from phandle arguments * @xlate_extended: vendor-specific callback for mapping node data from phandle arguments * @dev: the device this interconnect provider belongs to * @users: count of active users * @inter_set: whether inter-provider pairs will be configured with @set * @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); int (*aggregate)(struct icc_node *node, u32 tag, u32 avg_bw, u32 peak_bw, u32 *agg_avg, u32 *agg_peak); void (*pre_aggregate)(struct icc_node *node); int (*get_bw)(struct icc_node *node, u32 *avg, u32 *peak); struct icc_node* (*xlate)(const struct of_phandle_args *spec, void *data); struct icc_node_data* (*xlate_extended)(const struct of_phandle_args *spec, void *data); struct device *dev; int users; bool inter_set; 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 pointing to 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: the list entry in the parent provider's "nodes" list * @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 requests from all consumers * @peak_bw: aggregated value of peak bandwidth requests from all consumers * @init_avg: average bandwidth value that is read from the hardware during init * @init_peak: peak bandwidth value that is read from the hardware during init * @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 search_list; struct icc_node *reverse; u8 is_traversed:1; struct hlist_head req_list; u32 avg_bw; u32 peak_bw; u32 init_avg; u32 init_peak; void *data;};
#if IS_ENABLED(CONFIG_INTERCONNECT)
int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, u32 peak_bw, u32 *agg_avg, u32 *agg_peak);struct icc_node *icc_node_create_dyn(void);struct icc_node *icc_node_create(int id);void icc_node_destroy(int id);int icc_node_set_name(struct icc_node *node, const struct icc_provider *provider, const char *name);int icc_link_nodes(struct icc_node *src_node, struct icc_node **dst_node);int icc_link_create(struct icc_node *node, const int dst_id);void icc_node_add(struct icc_node *node, struct icc_provider *provider);void icc_node_del(struct icc_node *node);int icc_nodes_remove(struct icc_provider *provider);void icc_provider_init(struct icc_provider *provider);int icc_provider_register(struct icc_provider *provider);void icc_provider_deregister(struct icc_provider *provider);struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec);void icc_sync_state(struct device *dev);
#else
static inline int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, u32 peak_bw, u32 *agg_avg, u32 *agg_peak){ return -ENOTSUPP;}
static inline struct icc_node *icc_node_create_dyn(void){ return ERR_PTR(-EOPNOTSUPP);}
static inline struct icc_node *icc_node_create(int id){ return ERR_PTR(-ENOTSUPP);}
static inline void icc_node_destroy(int id){}
static inline int icc_node_set_name(struct icc_node *node, const struct icc_provider *provider, const char *name){ return -EOPNOTSUPP;}
static inline int icc_link_nodes(struct icc_node *src_node, struct icc_node **dst_node){ return -EOPNOTSUPP;}
static inline int icc_link_create(struct icc_node *node, const int dst_id){ return -ENOTSUPP;}
static inline void icc_node_add(struct icc_node *node, struct icc_provider *provider){}
static inline void icc_node_del(struct icc_node *node){}
static inline int icc_nodes_remove(struct icc_provider *provider){ return -ENOTSUPP;}
static inline void icc_provider_init(struct icc_provider *provider) { }
static inline int icc_provider_register(struct icc_provider *provider){ return -ENOTSUPP;}
static inline void icc_provider_deregister(struct icc_provider *provider) { }
static inline struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec){ return ERR_PTR(-ENOTSUPP);}
#endif /* CONFIG_INTERCONNECT */
#endif /* __LINUX_INTERCONNECT_PROVIDER_H */