arch/powerpc/include/asm/hvcserver.h

   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 */