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

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Date:   Wed, 19 Feb 2020 18:57:41 -0800
From:   Siddharth Gupta <sidgup@...eaurora.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     Siddharth Gupta <sidgup@...eaurora.org>,
        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: [PATCH 2/6] remoteproc: sysmon: Add notifications for events

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>
---
 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);
 
-- 
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