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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070020 * Author: Max Asböck <amax@us.ibm.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 *
22 */
23
24#pragma pack(1)
25struct i2o_header {
26 u8 version;
27 u8 message_flags;
28 u16 message_size;
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070029 u8 target;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 u8 initiator_and_target;
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070031 u8 initiator;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 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);
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070067
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 if (size % sizeof(u32))
69 i2o_size++;
70
71 return i2o_size;
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070072}
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
74static inline u32 incoming_data_size(struct i2o_message *i2o_message)
75{
76 return (sizeof(u32) * i2o_message->header.message_size);
77}