linux/rpmsg/ns.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002
0003 #ifndef _LINUX_RPMSG_NS_H
0004 #define _LINUX_RPMSG_NS_H
0005
0006 #include <linux/mod_devicetable.h>
0007 #include <linux/rpmsg.h>
0008 #include <linux/rpmsg/byteorder.h>
0009 #include <linux/types.h>
0010
0011 /**
0012  * struct rpmsg_ns_msg - dynamic name service announcement message
0013  * @name: name of remote service that is published
0014  * @addr: address of remote service that is published
0015  * @flags: indicates whether service is created or destroyed
0016  *
0017  * This message is sent across to publish a new service, or announce
0018  * about its removal. When we receive these messages, an appropriate
0019  * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe()
0020  * or ->remove() handler of the appropriate rpmsg driver will be invoked
0021  * (if/as-soon-as one is registered).
0022  */
0023 struct rpmsg_ns_msg {
0024     char name[RPMSG_NAME_SIZE];
0025     __rpmsg32 addr;
0026     __rpmsg32 flags;
0027 } __packed;
0028
0029 /**
0030  * enum rpmsg_ns_flags - dynamic name service announcement flags
0031  *
0032  * @RPMSG_NS_CREATE: a new remote service was just created
0033  * @RPMSG_NS_DESTROY: a known remote service was just destroyed
0034  */
0035 enum rpmsg_ns_flags {
0036     RPMSG_NS_CREATE     = 0,
0037     RPMSG_NS_DESTROY    = 1,
0038 };
0039
0040 /* Address 53 is reserved for advertising remote services */
0041 #define RPMSG_NS_ADDR           (53)
0042
0043 int rpmsg_ns_register_device(struct rpmsg_device *rpdev);
0044
0045 #endif