Adding flags to dictate how to handle a platform driver being removed
or the remote processor crashing while in RPROC_ATTACHED state.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/remoteproc/remoteproc_core.c | 25 +++++++++++++++++++++++++
include/linux/remoteproc.h | 5 +++++
2 files changed, 30 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 229fa2cad0bd..d024367c63e5 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2227,6 +2227,29 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
return 0;
}
+static void rproc_set_automation_flags(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct device_node *np = dev->of_node;
+ bool core_reboot, remote_crash;
+
+ /*
+ * When function rproc_cdev_release() or rproc_del() are called and
+ * the remote processor has been attached to, it will be detached from
+ * (rather than turned off) if "autonomous_on_core_reboot" is specified
+ * in the DT.
+ */
+ core_reboot = of_property_read_bool(np, "autonomous_on_core_reboot");
+ rproc->autonomous_on_core_reboot = core_reboot;
+
+ /*
+ * When the remote processor crashes it will be detached from, and
+ * attached to, if "autonomous_on_remote_crash" is specified in the DT.
+ */
+ remote_crash = of_property_read_bool(np, "autonomous_on_remote_crash");
+ rproc->autonomous_on_core_reboot = core_reboot;
+}
+
/**
* rproc_alloc() - allocate a remote processor handle
* @dev: the underlying device
@@ -2285,6 +2308,8 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
if (rproc_alloc_ops(rproc, ops))
goto put_device;
+ rproc_set_automation_flags(rproc);
+
/* Assign a unique device index and name */
rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL);
if (rproc->index < 0) {
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 71d4d4873164..9a6e79ef35d7 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -516,6 +516,9 @@ struct rproc_dump_segment {
* @nb_vdev: number of vdev currently handled by rproc
* @char_dev: character device of the rproc
* @cdev_put_on_release: flag to indicate if remoteproc should be shutdown on @char_dev release
+ * @autonomous_on_core_reboot: true if the remote processor should be detached from
+ * (rather than turned off) when the remoteproc core
+ * goes away.
*/
struct rproc {
struct list_head node;
@@ -554,6 +557,8 @@ struct rproc {
u16 elf_machine;
struct cdev cdev;
bool cdev_put_on_release;
+ bool autonomous_on_core_reboot : 1,
+ autonomous_on_remote_crash : 1;
};
/**
--
2.25.1
