drivers/misc/ibmasm/dot_command.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * IBM ASM Service Processor Device Driver
   4  *
   5  * Copyright (C) IBM Corporation, 2004
   6  *
   7  * Author: Max Asböck <amax@us.ibm.com>
   8  */
   9
  10 #ifndef __DOT_COMMAND_H__
  11 #define __DOT_COMMAND_H__
  12
  13 /*
  14  * dot commands are the protocol used to communicate with the service
  15  * processor.
  16  * They consist of header, a command of variable length and data of
  17  * variable length.
  18  */
  19
  20 /* dot command types */
  21 #define sp_write                0
  22 #define sp_write_next           1
  23 #define sp_read                 2
  24 #define sp_read_next            3
  25 #define sp_command_response     4
  26 #define sp_event                5
  27 #define sp_heartbeat            6
  28
  29 #pragma pack(1)
  30 struct dot_command_header {
  31         u8      type;
  32         u8      command_size;
  33         u16     data_size;
  34         u8      status;
  35         u8      reserved;
  36 };
  37 #pragma pack()
  38
  39 static inline size_t get_dot_command_size(void *buffer)
  40 {
  41         struct dot_command_header *cmd = (struct dot_command_header *)buffer;
  42         return sizeof(struct dot_command_header) + cmd->command_size + cmd->data_size;
  43 }
  44
  45 static inline unsigned int get_dot_command_timeout(void *buffer)
  46 {
  47         struct dot_command_header *header = (struct dot_command_header *)buffer;
  48         unsigned char *cmd = buffer + sizeof(struct dot_command_header);
  49
  50         /* dot commands 6.3.1, 7.1 and 8.x need a longer timeout */
  51
  52         if (header->command_size == 3) {
  53                 if ((cmd[0] == 6) && (cmd[1] == 3) && (cmd[2] == 1))
  54                         return IBMASM_CMD_TIMEOUT_EXTRA;
  55         } else if (header->command_size == 2) {
  56                 if ((cmd[0] == 7) && (cmd[1] == 1))
  57                         return IBMASM_CMD_TIMEOUT_EXTRA;
  58                 if (cmd[0] == 8)
  59                         return IBMASM_CMD_TIMEOUT_EXTRA;
  60         }
  61         return IBMASM_CMD_TIMEOUT_NORMAL;
  62 }
  63
  64 #endif /* __DOT_COMMAND_H__ */