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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _GUEST_CHANNEL_H
#define _GUEST_CHANNEL_H
#ifdef __cplusplus
extern "C" {
#endif
#include <channel_commands.h>
/**
* Connect to the Virtio-Serial VM end-point located in path. It is
* thread safe for unique lcore_ids. This function must be only called once from
* each lcore.
*
* @param path
* The path to the serial device on the filesystem
*
* @param lcore_id
* lcore_id.
*
* @return
* - 0 on success.
* - Negative on error.
*/
int guest_channel_host_connect(const char *path, unsigned int lcore_id);
/**
* Disconnect from an already connected Virtio-Serial Endpoint.
*
*
* @param lcore_id
* lcore_id.
*
*/
void guest_channel_host_disconnect(unsigned int lcore_id);
/**
* Send a message contained in pkt over the Virtio-Serial to the host endpoint.
*
* @param pkt
* Pointer to a populated struct guest_agent_pkt
*
* @param lcore_id
* lcore_id.
*
* @return
* - 0 on success.
* - Negative on channel not connected.
* - errno on write to channel error.
*/
int guest_channel_send_msg(struct channel_packet *pkt, unsigned int lcore_id);
/**
* Send a message contained in pkt over the Virtio-Serial to the host endpoint.
*
* @param pkt
* Pointer to a populated struct channel_packet
*
* @param lcore_id
* lcore_id.
*
* @return
* - 0 on success.
* - Negative on error.
*/
int rte_power_guest_channel_send_msg(struct channel_packet *pkt,
unsigned int lcore_id);
/**
* Read a message contained in pkt over the Virtio-Serial
* from the host endpoint.
*
* @param pkt
* Pointer to channel_packet or
* channel_packet_freq_list struct.
*
* @param pkt_len
* Size of expected data packet.
*
* @param lcore_id
* lcore_id.
*
* @return
* - 0 on success.
* - Negative on error.
*/
int power_guest_channel_read_msg(void *pkt,
size_t pkt_len,
unsigned int lcore_id);
/**
* Receive a message contained in pkt over the Virtio-Serial
* from the host endpoint.
*
* @param pkt
* Pointer to channel_packet or
* channel_packet_freq_list struct.
*
* @param pkt_len
* Size of expected data packet.
*
* @param lcore_id
* lcore_id.
*
* @return
* - 0 on success.
* - Negative on error.
*/
__rte_experimental
int
rte_power_guest_channel_receive_msg(void *pkt,
size_t pkt_len,
unsigned int lcore_id);
#ifdef __cplusplus
}
#endif
#endif
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