7a33572057
The private headers are compiled internally with a C compiler. Thus extern "C" declaration is useless in such files. Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef _GUEST_CHANNEL_H
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#define _GUEST_CHANNEL_H
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/**
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* Check if any Virtio-Serial VM end-points exist in path.
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*
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* @param path
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* The path to the serial device on the filesystem
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*
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* @return
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* - 1 if at least one potential end-point found.
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* - 0 if no end-points found.
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*/
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int guest_channel_host_check_exists(const char *path);
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/**
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* Connect to the Virtio-Serial VM end-point located in path. It is
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* thread safe for unique lcore_ids. This function must be only called once from
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* each lcore.
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*
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* @param path
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* The path to the serial device on the filesystem
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*
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* @param lcore_id
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* lcore_id.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int guest_channel_host_connect(const char *path, unsigned int lcore_id);
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/**
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* Disconnect from an already connected Virtio-Serial Endpoint.
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*
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*
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* @param lcore_id
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* lcore_id.
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*
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*/
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void guest_channel_host_disconnect(unsigned int lcore_id);
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/**
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* Send a message contained in pkt over the Virtio-Serial to the host endpoint.
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*
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* @param pkt
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* Pointer to a populated struct guest_agent_pkt
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*
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* @param lcore_id
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* lcore_id.
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*
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* @return
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* - 0 on success.
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* - Negative on channel not connected.
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* - errno on write to channel error.
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*/
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int guest_channel_send_msg(struct rte_power_channel_packet *pkt,
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unsigned int lcore_id);
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/**
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* Read a message contained in pkt over the Virtio-Serial
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* from the host endpoint.
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*
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* @param pkt
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* Pointer to rte_power_channel_packet or
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* rte_power_channel_packet_freq_list struct.
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*
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* @param pkt_len
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* Size of expected data packet.
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*
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* @param lcore_id
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* lcore_id.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int power_guest_channel_read_msg(void *pkt,
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size_t pkt_len,
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unsigned int lcore_id);
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#endif
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