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/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright (C) 2018 IBM Corp. */
#ifndef PROTOCOL_H
#define PROTOCOL_H
struct mbox_context;
/*
* The GET_MBOX_INFO command is special as it can change the interface based on
* negotiation. As such we need to accommodate all response types
*/
struct protocol_get_info {
struct {
uint8_t api_version;
} req;
struct {
uint8_t api_version;
union {
struct {
uint16_t read_window_size;
uint16_t write_window_size;
} v1;
struct {
uint8_t block_size_shift;
uint16_t timeout;
} v2;
};
} resp;
};
struct protocol_ops {
int (*reset)(struct mbox_context *context);
int (*get_info)(struct mbox_context *context,
struct protocol_get_info *io);
};
int protocol_init(struct mbox_context *context);
void protocol_free(struct mbox_context *context);
int protocol_negotiate_version(struct mbox_context *context, uint8_t requested);
/* Protocol v1 */
int protocol_v1_reset(struct mbox_context *context);
int protocol_v1_get_info(struct mbox_context *context,
struct protocol_get_info *io);
/* Protocol v2 */
int protocol_v2_get_info(struct mbox_context *context,
struct protocol_get_info *io);
#endif /* PROTOCOL_H */
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