From: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
Add the channel creation API as a first step to be able to define the
name service announcement as a rpmsg driver independent from the RPMsg
virtio bus.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/rpmsg/rpmsg_core.c | 44 ++++++++++++++++++++++++++++++++++
drivers/rpmsg/rpmsg_internal.h | 4 ++++
include/linux/rpmsg.h | 6 +++++
3 files changed, 54 insertions(+)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index a6361cad608b..a5c4b80debf3 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -20,6 +20,50 @@
#include "rpmsg_internal.h"
+/**
+ * rpmsg_create_channel() - create a new rpmsg channel
+ * using its name and address info.
+ * @rpdev: rpmsg device
+ * @chinfo: channel_info to bind
+ *
+ * Returns a pointer to the new rpmsg device on success, or NULL on error.
+ */
+struct rpmsg_device * rpmsg_create_channel(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo)
+{
+ if (WARN_ON(!rpdev))
+ return NULL;
+ if (!rpdev->ops || !rpdev->ops->create_channel) {
+ dev_err(&rpdev->dev, "no create_channel ops found\n");
+ return NULL;
+ }
+
+ return rpdev->ops->create_channel(rpdev, chinfo);
+}
+EXPORT_SYMBOL(rpmsg_create_channel);
+
+/**
+ * rpmsg_release_channel() - release a rpmsg channel
+ * using its name and address info.
+ * @rpdev: rpmsg device
+ * @chinfo: channel_info to bind
+ *
+ * Returns 0 on success or an appropriate error value.
+ */
+int rpmsg_release_channel(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo)
+{
+ if (WARN_ON(!rpdev))
+ return -EINVAL;
+ if (!rpdev->ops || !rpdev->ops->release_channel) {
+ dev_err(&rpdev->dev, "no release_channel ops found\n");
+ return -ENXIO;
+ }
+
+ return rpdev->ops->release_channel(rpdev, chinfo);
+}
+EXPORT_SYMBOL(rpmsg_release_channel);
+
/**
* 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 094cf968d2d3..b9b34b416b7b 100644
--- a/drivers/rpmsg/rpmsg_internal.h
+++ b/drivers/rpmsg/rpmsg_internal.h
@@ -56,6 +56,10 @@ int rpmsg_unregister_device(struct device *parent,
struct device *rpmsg_find_device(struct device *parent,
struct rpmsg_channel_info *chinfo);
+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);
/**
* rpmsg_chrdev_register_device() - register chrdev device based on rpdev
* @rpdev: prepared rpdev to be used for creating endpoints
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 165e4c6d4cd3..eb70463a9f2e 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -42,6 +42,8 @@ typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
/**
* struct rpmsg_device_ops - indirection table for the rpmsg_device operations
* @is_little_endian: returns true if using little endian byte ordering
+ * @create_channel: create backend-specific channel, optional
+ * @release_channel: release backend-specific channel, optional
* @create_ept: create backend-specific endpoint, required
* @announce_create: announce presence of new channel, optional
* @announce_destroy: announce destruction of channel, optional
@@ -52,6 +54,10 @@ typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
*/
struct rpmsg_device_ops {
bool (*is_little_endian)(struct rpmsg_device *rpdev);
+ struct rpmsg_device *(*create_channel)(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo);
+ int (*release_channel)(struct rpmsg_device *rpdev,
+ struct rpmsg_channel_info *chinfo);
struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,
rpmsg_rx_cb_t cb, void *priv,
struct rpmsg_channel_info chinfo);
--
2.25.1
