1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright 2019 Google LLC.
4  */
5 
6 #ifndef __LINUX_RPMSG_MTK_RPMSG_H
7 #define __LINUX_RPMSG_MTK_RPMSG_H
8 
9 #include <linux/platform_device.h>
10 #include <linux/remoteproc.h>
11 
12 typedef void (*ipi_handler_t)(void *data, unsigned int len, void *priv);
13 
14 /*
15  * struct mtk_rpmsg_info - IPI functions tied to the rpmsg device.
16  * @register_ipi: register IPI handler for an IPI id.
17  * @unregister_ipi: unregister IPI handler for a registered IPI id.
18  * @send_ipi: send IPI to an IPI id. wait is the timeout (in msecs) to wait
19  *            until response, or 0 if there's no timeout.
20  * @ns_ipi_id: the IPI id used for name service, or -1 if name service isn't
21  *             supported.
22  */
23 struct mtk_rpmsg_info {
24 	int (*register_ipi)(struct platform_device *pdev, u32 id,
25 			    ipi_handler_t handler, void *priv);
26 	void (*unregister_ipi)(struct platform_device *pdev, u32 id);
27 	int (*send_ipi)(struct platform_device *pdev, u32 id,
28 			void *buf, unsigned int len, unsigned int wait);
29 	int ns_ipi_id;
30 };
31 
32 struct rproc_subdev *
33 mtk_rpmsg_create_rproc_subdev(struct platform_device *pdev,
34 			      struct mtk_rpmsg_info *info);
35 
36 void mtk_rpmsg_destroy_rproc_subdev(struct rproc_subdev *subdev);
37 
38 #endif
39