This ops is called by the rpmsg flow control service to inform
a rpmsg local device of a remote endpoint flow control state.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxxxxxxx>
---
drivers/rpmsg/rpmsg_core.c | 24 ++++++++++++++++++++++++
drivers/rpmsg/rpmsg_internal.h | 7 +++++++
2 files changed, 31 insertions(+)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index 8de8aadd9b27..6bbc3b3ace50 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -67,6 +67,30 @@ int rpmsg_release_channel(struct rpmsg_device *rpdev,
}
EXPORT_SYMBOL(rpmsg_release_channel);
+/**
+ * rpmsg_channel_remote_fc() - announce remote endpoint flow control state
+ * using source and destination endpoint address info.
+ * @rpdev: rpmsg device
+ * @chinfo: channel_info
+ * @enable: state of the remote endpoint
+ *
+ * Return: 0 on success or an appropriate error value.
+ */
+int rpmsg_channel_remote_fc(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo,
+ bool enable)
+{
+ if (WARN_ON(!rpdev))
+ return -EINVAL;
+ if (!rpdev->ops || !rpdev->ops->announce_remote_fc) {
+ dev_err(&rpdev->dev, "no flow control ops found\n");
+ return -ENXIO;
+ }
+
+ return rpdev->ops->announce_remote_fc(rpdev, chinfo, enable);
+}
+EXPORT_SYMBOL(rpmsg_channel_remote_fc);
+
/**
* rpmsg_create_ept() - create a new rpmsg_endpoint
* @rpdev: rpmsg channel device
diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h
index 4ce58e68af30..44e2c0f2f5ea 100644
--- a/drivers/rpmsg/rpmsg_internal.h
+++ b/drivers/rpmsg/rpmsg_internal.h
@@ -43,6 +43,9 @@ struct rpmsg_device_ops {
int (*announce_create)(struct rpmsg_device *ept);
int (*announce_destroy)(struct rpmsg_device *ept);
+ int (*announce_remote_fc)(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo,
+ bool enable);
};
/**
@@ -87,6 +90,10 @@ struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
int rpmsg_release_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
+
+int rpmsg_channel_remote_fc(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo,
+ bool enable);
/**
* rpmsg_ctrldev_register_device() - register a char device for control based on rpdev
* @rpdev: prepared rpdev to be used for creating endpoints
--
2.25.1
