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https://github.com/torvalds/linux
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a13d5a246a
Adds configfs subsystem and attributes to the configuration manager to enable the listing of loaded configurations and features. The default values of feature parameters can be accessed and altered from these attributes to affect all installed devices using the feature. Link: https://lore.kernel.org/r/20210723165444.1048-10-mike.leach@linaro.org Signed-off-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20210818194022.379573-10-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Coresight system configuration driver.
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*/
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#ifndef CORESIGHT_SYSCFG_H
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#define CORESIGHT_SYSCFG_H
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#include <linux/configfs.h>
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#include <linux/coresight.h>
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#include <linux/device.h>
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#include "coresight-config.h"
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/**
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* System configuration manager device.
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*
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* Contains lists of the loaded configurations and features, plus a list of CoreSight devices
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* registered with the system as supporting configuration management.
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*
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* Need a device to 'own' some coresight system wide sysfs entries in
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* perf events, configfs etc.
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*
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* @dev: The device.
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* @csdev_desc_list: List of coresight devices registered with the configuration manager.
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* @feat_desc_list: List of feature descriptors to load into registered devices.
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* @config_desc_list: List of system configuration descriptors to load into registered devices.
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* @sys_active_cnt: Total number of active config descriptor references.
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* @cfgfs_subsys: configfs subsystem used to manage configurations.
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*/
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struct cscfg_manager {
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struct device dev;
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struct list_head csdev_desc_list;
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struct list_head feat_desc_list;
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struct list_head config_desc_list;
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atomic_t sys_active_cnt;
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struct configfs_subsystem cfgfs_subsys;
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};
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/* get reference to dev in cscfg_manager */
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struct device *cscfg_device(void);
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/**
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* List entry for Coresight devices that are registered as supporting complex
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* config operations.
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*
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* @csdev: The registered device.
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* @match_flags: The matching type information for adding features.
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* @ops: Operations supported by the registered device.
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* @item: list entry.
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*/
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struct cscfg_registered_csdev {
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struct coresight_device *csdev;
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u32 match_flags;
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struct cscfg_csdev_feat_ops ops;
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struct list_head item;
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};
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/* internal core operations for cscfg */
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int __init cscfg_init(void);
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void cscfg_exit(void);
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int cscfg_preload(void);
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const struct cscfg_feature_desc *cscfg_get_named_feat_desc(const char *name);
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int cscfg_update_feat_param_val(struct cscfg_feature_desc *feat_desc,
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int param_idx, u64 value);
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/* syscfg manager external API */
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int cscfg_load_config_sets(struct cscfg_config_desc **cfg_descs,
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struct cscfg_feature_desc **feat_descs);
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int cscfg_register_csdev(struct coresight_device *csdev, u32 match_flags,
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struct cscfg_csdev_feat_ops *ops);
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void cscfg_unregister_csdev(struct coresight_device *csdev);
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int cscfg_activate_config(unsigned long cfg_hash);
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void cscfg_deactivate_config(unsigned long cfg_hash);
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void cscfg_csdev_reset_feats(struct coresight_device *csdev);
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int cscfg_csdev_enable_active_config(struct coresight_device *csdev,
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unsigned long cfg_hash, int preset);
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void cscfg_csdev_disable_active_config(struct coresight_device *csdev);
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#endif /* CORESIGHT_SYSCFG_H */
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