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/* 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(d, struct rpmsg_driver, drv)
/**
* 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 *ept);
int (*announce_destroy)(struct rpmsg_device *ept);
};
/**
* 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
* @send_offchannel: see @rpmsg_send_offchannel(), optional
* @trysend: see @rpmsg_trysend(), required
* @trysendto: see @rpmsg_trysendto(), optional
* @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional
* @poll: see @rpmsg_poll(), 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 (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
__poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp,
poll_table *wait);
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_chrdev_register_device() - register chrdev device 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_chrdev_register_device(struct rpmsg_device *rpdev)
{
strcpy(rpdev->id.name, "rpmsg_chrdev");
rpdev->driver_override = "rpmsg_chrdev";
return rpmsg_register_device(rpdev);
}
#endif
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