@@ -119,4 +119,7 @@ static inline int rpmsg_ns_register_device(struct rpmsg_device *rpdev)
return rpmsg_register_device(rpdev);
}
+int rpmsg_ns_announce_create(struct rpmsg_device *rpdev);
+int rpmsg_ns_announce_destroy(struct rpmsg_device *rpdev);
+
#endif
@@ -37,6 +37,45 @@ struct rpmsg_ns_msg {
__le32 flags;
} __packed;
+/**
+ * rpmsg_ns_announce_create() - announce to the remote processor
+ * the service creation or destruction
+ * @rpdev: the rpmsg channel
+ * @ns_flag: related to the @rpmsg_ns_flags enum
+ *
+ * This function can be called on a channel creation or destruction to inform
+ * the remote processor, using the reserved name service anouncement channel.
+ */
+static int rpmsg_ns_channel_announce(struct rpmsg_device *rpdev, int ns_flag)
+{
+ struct rpmsg_ns_msg nsm;
+
+ if (!rpdev->announce || !rpdev->ept)
+ return 0;
+
+ if (ns_flag != RPMSG_NS_CREATE && ns_flag != RPMSG_NS_DESTROY)
+ return -EINVAL;
+
+ strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
+ nsm.addr = cpu_to_le32(rpdev->ept->addr);
+ nsm.flags = cpu_to_le32(ns_flag);
+
+ return rpmsg_send_offchannel(rpdev->ept, RPMSG_NS_ADDR, RPMSG_NS_ADDR,
+ &nsm, sizeof(nsm));
+}
+
+int rpmsg_ns_announce_create(struct rpmsg_device *rpdev)
+{
+ return rpmsg_ns_channel_announce(rpdev, RPMSG_NS_CREATE);
+}
+EXPORT_SYMBOL(rpmsg_ns_announce_create);
+
+int rpmsg_ns_announce_destroy(struct rpmsg_device *rpdev)
+{
+ return rpmsg_ns_channel_announce(rpdev, RPMSG_NS_DESTROY);
+}
+EXPORT_SYMBOL(rpmsg_ns_announce_destroy);
+
/* Invoked when a name service announcement arrives */
static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
void *priv, u32 src)
As the RPMsg driver is in charge of the name service announcement, create an API to send channel creation and destruction to the remote processor. Notice that the source address of the message sent is now RPMSG_NS_ADDR. Legacy implementation was to send the message with source address corresponding to the ept created. RPMSG_NS_ADDR as source address make sense as we want to send a message belonging to the NS announcement service and the created ept address is already in the message payload. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> --- drivers/rpmsg/rpmsg_internal.h | 3 +++ drivers/rpmsg/rpmsg_ns.c | 39 ++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+)