drivers/misc/ibmasm/dot_command.h

   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)
  44 struct 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
  53 static 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
  59 static 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__ */