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Diffstat (limited to 'include/linux/rpmsg.h')
-rw-r--r--include/linux/rpmsg.h125
1 files changed, 115 insertions, 10 deletions
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 452d393cc8dd..18f9e1ae4b7e 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -37,6 +37,7 @@
#include <linux/types.h>
#include <linux/device.h>
+#include <linux/err.h>
#include <linux/mod_devicetable.h>
#include <linux/kref.h>
#include <linux/mutex.h>
@@ -64,6 +65,7 @@ struct rpmsg_channel_info {
* rpmsg_device - device that belong to the rpmsg bus
* @dev: the device struct
* @id: device id (used to match between rpmsg drivers and devices)
+ * @driver_override: driver name to force a match
* @src: local address
* @dst: destination address
* @ept: the rpmsg endpoint of this channel
@@ -72,6 +74,7 @@ struct rpmsg_channel_info {
struct rpmsg_device {
struct device dev;
struct rpmsg_device_id id;
+ char *driver_override;
u32 src;
u32 dst;
struct rpmsg_endpoint *ept;
@@ -132,6 +135,8 @@ struct rpmsg_driver {
int (*callback)(struct rpmsg_device *, void *, int, void *, u32);
};
+#if IS_ENABLED(CONFIG_RPMSG)
+
int register_rpmsg_device(struct rpmsg_device *dev);
void unregister_rpmsg_device(struct rpmsg_device *dev);
int __register_rpmsg_driver(struct rpmsg_driver *drv, struct module *owner);
@@ -141,6 +146,116 @@ struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
rpmsg_rx_cb_t cb, void *priv,
struct rpmsg_channel_info chinfo);
+int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
+int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
+
+int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
+int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
+
+#else
+
+static inline int register_rpmsg_device(struct rpmsg_device *dev)
+{
+ return -ENXIO;
+}
+
+static inline void unregister_rpmsg_device(struct rpmsg_device *dev)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+}
+
+static inline int __register_rpmsg_driver(struct rpmsg_driver *drv,
+ struct module *owner)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline void unregister_rpmsg_driver(struct rpmsg_driver *drv)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+}
+
+static inline void rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+}
+
+static inline struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb,
+ void *priv,
+ struct rpmsg_channel_info chinfo)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return ERR_PTR(-ENXIO);
+}
+
+static inline int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,
+ u32 dst)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+
+}
+
+static inline int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
+ int len, u32 dst)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+#endif /* IS_ENABLED(CONFIG_RPMSG) */
+
/* use a macro to avoid include chaining to get THIS_MODULE */
#define register_rpmsg_driver(drv) \
__register_rpmsg_driver(drv, THIS_MODULE)
@@ -157,14 +272,4 @@ struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
module_driver(__rpmsg_driver, register_rpmsg_driver, \
unregister_rpmsg_driver)
-int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
-int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
-int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
- void *data, int len);
-
-int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
-int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
-int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
- void *data, int len);
-
#endif /* _LINUX_RPMSG_H */