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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Coresight system configuration driver.
*/
#ifndef CORESIGHT_SYSCFG_H
#define CORESIGHT_SYSCFG_H
#include <linux/configfs.h>
#include <linux/coresight.h>
#include <linux/device.h>
#include "coresight-config.h"
/**
* System configuration manager device.
*
* Contains lists of the loaded configurations and features, plus a list of CoreSight devices
* registered with the system as supporting configuration management.
*
* Need a device to 'own' some coresight system wide sysfs entries in
* perf events, configfs etc.
*
* @dev: The device.
* @csdev_desc_list: List of coresight devices registered with the configuration manager.
* @feat_desc_list: List of feature descriptors to load into registered devices.
* @config_desc_list: List of system configuration descriptors to load into registered devices.
* @sys_active_cnt: Total number of active config descriptor references.
* @cfgfs_subsys: configfs subsystem used to manage configurations.
*/
struct cscfg_manager {
struct device dev;
struct list_head csdev_desc_list;
struct list_head feat_desc_list;
struct list_head config_desc_list;
atomic_t sys_active_cnt;
struct configfs_subsystem cfgfs_subsys;
};
/* get reference to dev in cscfg_manager */
struct device *cscfg_device(void);
/**
* List entry for Coresight devices that are registered as supporting complex
* config operations.
*
* @csdev: The registered device.
* @match_flags: The matching type information for adding features.
* @ops: Operations supported by the registered device.
* @item: list entry.
*/
struct cscfg_registered_csdev {
struct coresight_device *csdev;
u32 match_flags;
struct cscfg_csdev_feat_ops ops;
struct list_head item;
};
/* internal core operations for cscfg */
int __init cscfg_init(void);
void cscfg_exit(void);
int cscfg_preload(void);
const struct cscfg_feature_desc *cscfg_get_named_feat_desc(const char *name);
int cscfg_update_feat_param_val(struct cscfg_feature_desc *feat_desc,
int param_idx, u64 value);
/* syscfg manager external API */
int cscfg_load_config_sets(struct cscfg_config_desc **cfg_descs,
struct cscfg_feature_desc **feat_descs);
int cscfg_register_csdev(struct coresight_device *csdev, u32 match_flags,
struct cscfg_csdev_feat_ops *ops);
void cscfg_unregister_csdev(struct coresight_device *csdev);
int cscfg_activate_config(unsigned long cfg_hash);
void cscfg_deactivate_config(unsigned long cfg_hash);
void cscfg_csdev_reset_feats(struct coresight_device *csdev);
int cscfg_csdev_enable_active_config(struct coresight_device *csdev,
unsigned long cfg_hash, int preset);
void cscfg_csdev_disable_active_config(struct coresight_device *csdev);
#endif /* CORESIGHT_SYSCFG_H */
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