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remoteproc: qcom: Add notification types to SSR 

The SSR subdevice only adds callback for the unprepare event. Add callbacks
for prepare, start and prepare events. The client driver for a particular
remoteproc might be interested in knowing the status of the remoteproc
while undergoing SSR, not just when the remoteproc has finished shutting
down.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Link: https://lore.kernel.org/r/1592965408-16908-3-git-send-email-rishabhb@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Rishabh Bhatnagar 2020-06-23 19:23:28 -07:00 committed by Bjorn Andersson
parent 5abfe5cf0b
commit 62495d7784
2 changed files with 59 additions and 1 deletions
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44
drivers/remoteproc/qcom_common.c
View File

@ -265,6 +265,44 @@ int qcom_unregister_ssr_notifier(void *notify, struct notifier_block *nb)
}
EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);
static int ssr_notify_prepare(struct rproc_subdev *subdev)
{
struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
struct qcom_ssr_notify_data data = {
.name = ssr->info->name,
.crashed = false,
};
srcu_notifier_call_chain(&ssr->info->notifier_list,
QCOM_SSR_BEFORE_POWERUP, &data);
return 0;
}
static int ssr_notify_start(struct rproc_subdev *subdev)
{
struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
struct qcom_ssr_notify_data data = {
.name = ssr->info->name,
.crashed = false,
};
srcu_notifier_call_chain(&ssr->info->notifier_list,
QCOM_SSR_AFTER_POWERUP, &data);
return 0;
}
static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed)
{
struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
struct qcom_ssr_notify_data data = {
.name = ssr->info->name,
.crashed = crashed,
};
srcu_notifier_call_chain(&ssr->info->notifier_list,
QCOM_SSR_BEFORE_SHUTDOWN, &data);
}
static void ssr_notify_unprepare(struct rproc_subdev *subdev)
{
struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
@ -273,7 +311,8 @@ static void ssr_notify_unprepare(struct rproc_subdev *subdev)
.crashed = false,
};
srcu_notifier_call_chain(&ssr->info->notifier_list, 0, &data);
srcu_notifier_call_chain(&ssr->info->notifier_list,
QCOM_SSR_AFTER_SHUTDOWN, &data);
}
/**
@ -298,6 +337,9 @@ void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
}
ssr->info = info;
ssr->subdev.prepare = ssr_notify_prepare;
ssr->subdev.start = ssr_notify_start;
ssr->subdev.stop = ssr_notify_stop;
ssr->subdev.unprepare = ssr_notify_unprepare;
rproc_add_subdev(rproc, &ssr->subdev);

16
include/linux/remoteproc/qcom_rproc.h
View File

@ -5,6 +5,22 @@ struct notifier_block;
#if IS_ENABLED(CONFIG_QCOM_RPROC_COMMON)
/**
* enum qcom_ssr_notify_type - Startup/Shutdown events related to a remoteproc
* processor.
*
* @QCOM_SSR_BEFORE_POWERUP: Remoteproc about to start (prepare stage)
* @QCOM_SSR_AFTER_POWERUP: Remoteproc is running (start stage)
* @QCOM_SSR_BEFORE_SHUTDOWN: Remoteproc crashed or shutting down (stop stage)
* @QCOM_SSR_AFTER_SHUTDOWN: Remoteproc is down (unprepare stage)
*/
enum qcom_ssr_notify_type {
QCOM_SSR_BEFORE_POWERUP,
QCOM_SSR_AFTER_POWERUP,
QCOM_SSR_BEFORE_SHUTDOWN,
QCOM_SSR_AFTER_SHUTDOWN,
};
struct qcom_ssr_notify_data {
const char *name;
bool crashed;