LXR linux/drivers/misc/ibmasm/dot

   1/*
   2 * IBM ASM Service Processor Device Driver
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 *
  18 * Copyright (C) IBM Corporation, 2004
  19 *
  20 * Author: Max Asböck <amax@us.ibm.com>
  21 *
  22 */
  23
  24#ifndef __DOT_COMMAND_H__
  25#define __DOT_COMMAND_H__
  26
  27/*
  28 * dot commands are the protocol used to communicate with the service
  29 * processor.
  30 * They consist of header, a command of variable length and data of
  31 * variable length.
  32 */
  33
  34/* dot command types */
  35#define sp_write                0
  36#define sp_write_next           1
  37#define sp_read                 2
  38#define sp_read_next            3
  39#define sp_command_response     4
  40#define sp_event                5
  41#define sp_heartbeat            6
  42
  43#pragma pack(1)
  44struct dot_command_header {
  45        u8      type;
  46        u8      command_size;
  47        u16     data_size;
  48        u8      status;
  49        u8      reserved;
  50};
  51#pragma pack()
  52
  53static inline size_t get_dot_command_size(void *buffer)
  54{
  55        struct dot_command_header *cmd = (struct dot_command_header *)buffer;
  56        return sizeof(struct dot_command_header) + cmd->command_size + cmd->data_size;
  57}
  58
  59static inline unsigned int get_dot_command_timeout(void *buffer)
  60{
  61        struct dot_command_header *header = (struct dot_command_header *)buffer;
  62        unsigned char *cmd = buffer + sizeof(struct dot_command_header);
  63
  64        /* dot commands 6.3.1, 7.1 and 8.x need a longer timeout */
  65
  66        if (header->command_size == 3) {
  67                if ((cmd[0] == 6) && (cmd[1] == 3) && (cmd[2] == 1))
  68                        return IBMASM_CMD_TIMEOUT_EXTRA;
  69        } else if (header->command_size == 2) {
  70                if ((cmd[0] == 7) && (cmd[1] == 1))
  71                        return IBMASM_CMD_TIMEOUT_EXTRA;
  72                if (cmd[0] == 8)
  73                        return IBMASM_CMD_TIMEOUT_EXTRA;
  74        }
  75        return IBMASM_CMD_TIMEOUT_NORMAL;
  76}
  77
  78#endif /* __DOT_COMMAND_H__ */
  79