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)
30struct 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
39static 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
45static 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__ */
65

source code of linux/drivers/misc/ibmasm/dot_command.h