name : interconnect-provider.h /* 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(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)(struct of_phandle_args *spec, void *data); struct icc_node_data* (*xlate_extended)(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(int id); void icc_node_destroy(int id); 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(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(int id) { return ERR_PTR(-ENOTSUPP); } static inline void icc_node_destroy(int id) { } 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(struct of_phandle_args *spec) { return ERR_PTR(-ENOTSUPP); } #endif /* CONFIG_INTERCONNECT */ #endif /* __LINUX_INTERCONNECT_PROVIDER_H */