1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * hvcserver.h
4 * Copyright (C) 2004 Ryan S Arnold, IBM Corporation
5 *
6 * PPC64 virtual I/O console server support.
7 */
8
9#ifndef _PPC64_HVCSERVER_H
10#define _PPC64_HVCSERVER_H
11#ifdef __KERNEL__
12
13#include <linux/list.h>
14
15/* Converged Location Code length */
16#define HVCS_CLC_LENGTH	79
17
18/**
19 * hvcs_partner_info - an element in a list of partner info
20 * @node: list_head denoting this partner_info struct's position in the list of
21 *	partner info.
22 * @unit_address: The partner unit address of this entry.
23 * @partition_ID: The partner partition ID of this entry.
24 * @location_code: The converged location code of this entry + 1 char for the
25 *	null-term.
26 *
27 * This structure outlines the format that partner info is presented to a caller
28 * of the hvcs partner info fetching functions.  These are strung together into
29 * a list using linux kernel lists.
30 */
31struct hvcs_partner_info {
32	struct list_head node;
33	uint32_t unit_address;
34	uint32_t partition_ID;
35	char location_code[HVCS_CLC_LENGTH + 1]; /* CLC + 1 null-term char */
36};
37
38extern int hvcs_free_partner_info(struct list_head *head);
39extern int hvcs_get_partner_info(uint32_t unit_address,
40		struct list_head *head, unsigned long *pi_buff);
41extern int hvcs_register_connection(uint32_t unit_address,
42		uint32_t p_partition_ID, uint32_t p_unit_address);
43extern int hvcs_free_connection(uint32_t unit_address);
44
45#endif /* __KERNEL__ */
46#endif /* _PPC64_HVCSERVER_H */
47