/* 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, void *data, int len);
int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
int (*trysendto)(struct rpmsg_endpoint *ept, 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
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