include/linux/interconnect-provider.h

Source file repositories/reference/linux-study-clean/include/linux/interconnect-provider.h

File Facts

System
Linux kernel
Corpus path
include/linux/interconnect-provider.h
Extension
.h
Size
6239 bytes
Lines
202
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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;

Annotation

Implementation Notes