rpmsg: Introduce indirection table for rpmsg_device operations
To allow for multiple backend implementations add an indireection table
for rpmsg_device related operations and move the virtio implementation
behind this table.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 35a0f39..9fdcfc7 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -96,6 +96,8 @@
#define RPMSG_ADDR_ANY 0xFFFFFFFF
struct virtproc_info;
+struct rpmsg_endpoint;
+struct rpmsg_device_ops;
/**
* struct rpmsg_channel_info - channel info representation
@@ -127,11 +129,32 @@
u32 dst;
struct rpmsg_endpoint *ept;
bool announce;
+
+ const struct rpmsg_device_ops *ops;
};
typedef void (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
/**
+ * struct rpmsg_device_ops - indirection table for the rpmsg_device operations
+ * @create_ept: create backend-specific endpoint, requried
+ * @announce_create: announce presence of new channel, optional
+ * @announce_destroy: announce destruction of channel, optional
+ *
+ * Indirection table for the operations that a rpmsg backend should implement.
+ * @announce_create and @announce_destroy are optional as the backend might
+ * advertise new channels implicitly by creating the endpoints.
+ */
+struct rpmsg_device_ops {
+ struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb, void *priv,
+ struct rpmsg_channel_info chinfo);
+
+ int (*announce_create)(struct rpmsg_device *ept);
+ int (*announce_destroy)(struct rpmsg_device *ept);
+};
+
+/**
* struct rpmsg_endpoint - binds a local rpmsg address to its user
* @rpdev: rpmsg channel device
* @refcount: when this drops to zero, the ept is deallocated