linux-kernel - Re: [PATCH v2 2/6] remoteproc: sysmon: Add notifications for events

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Date:   Wed, 15 Apr 2020 11:03:51 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Siddharth Gupta <sidgup@...eaurora.org>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, ohad@...ery.com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, tsoni@...eaurora.org,
        psodagud@...eaurora.org, rishabhb@...eaurora.org
Subject: Re: [PATCH v2 2/6] remoteproc: sysmon: Add notifications for events

On Wed, Apr 08, 2020 at 04:36:39PM -0700, Siddharth Gupta wrote:
> Add notification for other stages of remoteproc boot and shutdown. This
> includes adding callback functions for the prepare and unprepare events,
> and fleshing out the callback function for start.
> 
> Signed-off-by: Siddharth Gupta <sidgup@...eaurora.org>

Acked-by: Mathieu Poirier <mathieu.poirier@...aro.org>

> ---
>  drivers/remoteproc/qcom_sysmon.c | 37 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
> index 1366050..851664e 100644
> --- a/drivers/remoteproc/qcom_sysmon.c
> +++ b/drivers/remoteproc/qcom_sysmon.c
> @@ -439,8 +439,31 @@ static const struct qmi_ops ssctl_ops = {
>  	.del_server = ssctl_del_server,
>  };
>  
> +static int sysmon_prepare(struct rproc_subdev *subdev)
> +{
> +	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
> +						  subdev);
> +	struct sysmon_event event = {
> +		.subsys_name = sysmon->name,
> +		.ssr_event = SSCTL_SSR_EVENT_BEFORE_POWERUP
> +	};
> +
> +	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
> +
> +	return 0;
> +}
> +
>  static int sysmon_start(struct rproc_subdev *subdev)
>  {
> +	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
> +						  subdev);
> +	struct sysmon_event event = {
> +		.subsys_name = sysmon->name,
> +		.ssr_event = SSCTL_SSR_EVENT_AFTER_POWERUP
> +	};
> +
> +	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
> +
>  	return 0;
>  }
>  
> @@ -464,6 +487,18 @@ static void sysmon_stop(struct rproc_subdev *subdev, bool crashed)
>  		sysmon_request_shutdown(sysmon);
>  }
>  
> +static void sysmon_unprepare(struct rproc_subdev *subdev)
> +{
> +	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
> +						  subdev);
> +	struct sysmon_event event = {
> +		.subsys_name = sysmon->name,
> +		.ssr_event = SSCTL_SSR_EVENT_AFTER_SHUTDOWN
> +	};
> +
> +	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
> +}
> +
>  /**
>   * sysmon_notify() - notify sysmon target of another's SSR
>   * @nb:		notifier_block associated with sysmon instance
> @@ -563,8 +598,10 @@ struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
>  
>  	qmi_add_lookup(&sysmon->qmi, 43, 0, 0);
>  
> +	sysmon->subdev.prepare = sysmon_prepare;
>  	sysmon->subdev.start = sysmon_start;
>  	sysmon->subdev.stop = sysmon_stop;
> +	sysmon->subdev.unprepare = sysmon_unprepare;
>  
>  	rproc_add_subdev(rproc, &sysmon->subdev);
>  
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project