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remoteproc: sysmon: Inform current rproc about all active rprocs 

Clients/services running on a remoteproc that booted up might need to be
aware of the state of already running remoteprocs. When a remoteproc boots
up (fresh or after recovery) it is not aware of the remoteprocs that booted
before it, i.e., the system state is incomplete. So to keep track of it we
send sysmon on behalf of all 'ONLINE' remoteprocs.

Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Link: https://lore.kernel.org/r/1586389003-26675-4-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Siddharth Gupta 2020-04-08 16:36:40 -07:00 committed by Bjorn Andersson
parent 1877f54f75
commit 1f36ab3f6e
1 changed files with 25 additions and 0 deletions
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25
drivers/remoteproc/qcom_sysmon.c
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@ -453,10 +453,20 @@ static int sysmon_prepare(struct rproc_subdev *subdev)
return 0;
}
/**
* sysmon_start() - start callback for the sysmon remoteproc subdevice
* @subdev: instance of the sysmon subdevice
*
* Inform all the listners of sysmon notifications that the rproc associated
* to @subdev has booted up. The rproc that booted up also needs to know
* which rprocs are already up and running, so send start notifications
* on behalf of all the online rprocs.
*/
static int sysmon_start(struct rproc_subdev *subdev)
{
struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon,
subdev);
struct qcom_sysmon *target;
struct sysmon_event event = {
.subsys_name = sysmon->name,
.ssr_event = SSCTL_SSR_EVENT_AFTER_POWERUP
@ -464,6 +474,21 @@ static int sysmon_start(struct rproc_subdev *subdev)
blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event);
mutex_lock(&sysmon_lock);
list_for_each_entry(target, &sysmon_list, node) {
if (target == sysmon ||
target->rproc->state != RPROC_RUNNING)
continue;
event.subsys_name = target->name;
if (sysmon->ssctl_version == 2)
ssctl_send_event(sysmon, &event);
else if (sysmon->ept)
sysmon_send_event(sysmon, &event);
}
mutex_unlock(&sysmon_lock);
return 0;
}