xref: /openbmc/linux/include/linux/rpmsg/ns.h (revision 950a7388)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef _LINUX_RPMSG_NS_H
4 #define _LINUX_RPMSG_NS_H
5 
6 #include <linux/mod_devicetable.h>
7 #include <linux/rpmsg.h>
8 #include <linux/rpmsg/byteorder.h>
9 #include <linux/types.h>
10 
11 /**
12  * struct rpmsg_ns_msg - dynamic name service announcement message
13  * @name: name of remote service that is published
14  * @addr: address of remote service that is published
15  * @flags: indicates whether service is created or destroyed
16  *
17  * This message is sent across to publish a new service, or announce
18  * about its removal. When we receive these messages, an appropriate
19  * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe()
20  * or ->remove() handler of the appropriate rpmsg driver will be invoked
21  * (if/as-soon-as one is registered).
22  */
23 struct rpmsg_ns_msg {
24 	char name[RPMSG_NAME_SIZE];
25 	__rpmsg32 addr;
26 	__rpmsg32 flags;
27 } __packed;
28 
29 /**
30  * enum rpmsg_ns_flags - dynamic name service announcement flags
31  *
32  * @RPMSG_NS_CREATE: a new remote service was just created
33  * @RPMSG_NS_DESTROY: a known remote service was just destroyed
34  */
35 enum rpmsg_ns_flags {
36 	RPMSG_NS_CREATE		= 0,
37 	RPMSG_NS_DESTROY	= 1,
38 };
39 
40 /* Address 53 is reserved for advertising remote services */
41 #define RPMSG_NS_ADDR			(53)
42 
43 int rpmsg_ns_register_device(struct rpmsg_device *rpdev);
44 
45 #endif
46