/* SPDX-License-Identifier: GPL-2.0 *//* * remote processor messaging bus internals * * Copyright (C) 2011 Texas Instruments, Inc. * Copyright (C) 2011 Google, Inc. * * Ohad Ben-Cohen <ohad@wizery.com> * Brian Swetland <swetland@google.com> */ #ifndef __RPMSG_INTERNAL_H__#define __RPMSG_INTERNAL_H__ #include <linux/rpmsg.h>#include <linux/poll.h> #define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev)#define to_rpmsg_driver(d) container_of_const(d, struct rpmsg_driver, drv) extern const struct class rpmsg_class; /** * struct rpmsg_device_ops - indirection table for the rpmsg_device operations * @create_channel:	create backend-specific channel, optional * @release_channel:	release backend-specific channel, optional * @create_ept:		create backend-specific endpoint, required * @announce_create:	announce presence of new channel, optional * @announce_destroy:	announce destruction of channel, optional * * Indirection table for the operations that a rpmsg backend should implement. * @announce_create and @announce_destroy are optional as the backend might * advertise new channels implicitly by creating the endpoints. */struct rpmsg_device_ops {	struct rpmsg_device *(*create_channel)(struct rpmsg_device *rpdev,					       struct rpmsg_channel_info *chinfo);	int (*release_channel)(struct rpmsg_device *rpdev,			       struct rpmsg_channel_info *chinfo);	struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,					    rpmsg_rx_cb_t cb, void *priv,					    struct rpmsg_channel_info chinfo); 	int (*announce_create)(struct rpmsg_device *rpdev);	int (*announce_destroy)(struct rpmsg_device *rpdev);}; /** * struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations * @destroy_ept:	see @rpmsg_destroy_ept(), required * @send:		see @rpmsg_send(), required * @sendto:		see @rpmsg_sendto(), optional * @trysend:		see @rpmsg_trysend(), required * @trysendto:		see @rpmsg_trysendto(), optional * @poll:		see @rpmsg_poll(), optional * @set_flow_control:	see @rpmsg_set_flow_control(), optional * @get_mtu:		see @rpmsg_get_mtu(), optional * * Indirection table for the operations that a rpmsg backend should implement. * In addition to @destroy_ept, the backend must at least implement @send and * @trysend, while the variants sending data off-channel are optional. */struct rpmsg_endpoint_ops {	void (*destroy_ept)(struct rpmsg_endpoint *ept); 	int (*send)(struct rpmsg_endpoint *ept, const void *data, int len);	int (*sendto)(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst); 	int (*trysend)(struct rpmsg_endpoint *ept, const void *data, int len);	int (*trysendto)(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst);	__poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp,			     poll_table *wait);	int (*set_flow_control)(struct rpmsg_endpoint *ept, bool pause, u32 dst);	ssize_t (*get_mtu)(struct rpmsg_endpoint *ept);}; struct device *rpmsg_find_device(struct device *parent,				 struct rpmsg_channel_info *chinfo); struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,					  struct rpmsg_channel_info *chinfo);int rpmsg_release_channel(struct rpmsg_device *rpdev,			  struct rpmsg_channel_info *chinfo);/** * rpmsg_ctrldev_register_device() - register a char device for control based on rpdev * @rpdev:	prepared rpdev to be used for creating endpoints * * This function wraps rpmsg_register_device() preparing the rpdev for use as * basis for the rpmsg chrdev. */static inline int rpmsg_ctrldev_register_device(struct rpmsg_device *rpdev){	return rpmsg_register_device_override(rpdev, "rpmsg_ctrl");} #endif