linux-kernel - Re: [PATCH v4 02/10] coresight: syscfg: Add registration and feature loading for cs devices

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Date:   Fri, 19 Feb 2021 11:43:13 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Mike Leach <mike.leach@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        linux-doc@...r.kernel.org, suzuki.poulose@....com,
        yabinc@...gle.com, corbet@....net, leo.yan@...aro.org,
        alexander.shishkin@...ux.intel.com, tingwei@...eaurora.org,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 02/10] coresight: syscfg: Add registration and feature
 loading for cs devices

[...]

> +/**
> + * List entry for Coresight devices that are registered as supporting complex
> + * config operations.
> + *
> + * @csdev:	The registered device.
> + * @match_info: The matching type information.
> + * @ops:	Operations supported by the registered device.
> + * @item:	list entry.
> + */
> +struct cscfg_csdev_register {
> +	struct coresight_device *csdev;
> +	struct cscfg_match_desc match_info;
> +	struct cscfg_csdev_feat_ops ops;
> +	struct list_head item;
> +};

I would call this structure cscfg_registered_csdev and move it to
coresight-config.h.  That way it is consistent with cscfg_config_csdev and
cscfg_feature_csdev and located all in the same file.

I may have to come back to this patch but for now it holds together.

More comments to come on Monday.

Thanks,
Mathieu

> +
>  /* internal core operations for cscfg */
>  int __init cscfg_init(void);
>  void __exit cscfg_exit(void);
> @@ -33,6 +49,10 @@ void __exit cscfg_exit(void);
>  /* 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,
> +			 struct cscfg_match_desc *info,
> +			 struct cscfg_csdev_feat_ops *ops);
> +void cscfg_unregister_csdev(struct coresight_device *csdev);
>  
>  /**
>   * System configuration manager device.
> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> index 976ec2697610..d0126ed326a6 100644
> --- a/include/linux/coresight.h
> +++ b/include/linux/coresight.h
> @@ -219,6 +219,8 @@ struct coresight_sysfs_link {
>   * @nr_links:   number of sysfs links created to other components from this
>   *		device. These will appear in the "connections" group.
>   * @has_conns_grp: Have added a "connections" group for sysfs links.
> + * @feature_csdev_list: List of complex feature programming added to the device.
> + * @config_csdev_list:  List of system configurations added to the device.
>   */
>  struct coresight_device {
>  	struct coresight_platform_data *pdata;
> @@ -240,6 +242,9 @@ struct coresight_device {
>  	int nr_links;
>  	bool has_conns_grp;
>  	bool ect_enabled; /* true only if associated ect device is enabled */
> +	/* system configuration and feature lists */
> +	struct list_head feature_csdev_list;
> +	struct list_head config_csdev_list;
>  };
>  
>  /*
> -- 
> 2.17.1
>