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 */
31 struct 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
38 extern int hvcs_free_partner_info(struct list_head *head);
39 extern int hvcs_get_partner_info(uint32_t unit_address,
40 struct list_head *head, unsigned long *pi_buff);
41 extern int hvcs_register_connection(uint32_t unit_address,
42 uint32_t p_partition_ID, uint32_t p_unit_address);
43 extern int hvcs_free_connection(uint32_t unit_address);
44
45 #endif /* __KERNEL__ */
46 #endif /* _PPC64_HVCSERVER_H */