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#pragma pack(1)
25struct i2o_header {
26	u8	version;
27	u8	message_flags;
28	u16	message_size;
29	u8	target;
30	u8	initiator_and_target;
31	u8	initiator;
32	u8	function;
33	u32	initiator_context;
34};
35#pragma pack()
36
37#define I2O_HEADER_TEMPLATE \
38      { .version              = 0x01, \
39	.message_flags        = 0x00, \
40	.function             = 0xFF, \
41	.initiator            = 0x00, \
42	.initiator_and_target = 0x40, \
43	.target               = 0x00, \
44	.initiator_context    = 0x0 }
45
46#define I2O_MESSAGE_SIZE	0x1000
47#define I2O_COMMAND_SIZE	(I2O_MESSAGE_SIZE - sizeof(struct i2o_header))
48
49#pragma pack(1)
50struct i2o_message {
51	struct i2o_header	header;
52	void			*data;
53};
54#pragma pack()
55
56static inline unsigned short outgoing_message_size(unsigned int data_size)
57{
58	unsigned int size;
59	unsigned short i2o_size;
60
61	if (data_size > I2O_COMMAND_SIZE)
62		data_size = I2O_COMMAND_SIZE;
63
64	size = sizeof(struct i2o_header) + data_size;
65
66	i2o_size = size / sizeof(u32);
67
68	if (size % sizeof(u32))
69	       i2o_size++;
70
71	return i2o_size;
72}
73
74static inline u32 incoming_data_size(struct i2o_message *i2o_message)
75{
76	return (sizeof(u32) * i2o_message->header.message_size);
77}
78