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