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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * IBM ASM Service Processor Device Driver | |
4 | * | |
1da177e4 LT |
5 | * Copyright (C) IBM Corporation, 2004 |
6 | * | |
d36b6910 | 7 | * Author: Max Asböck <amax@us.ibm.com> |
1da177e4 LT |
8 | */ |
9 | ||
10 | #pragma pack(1) | |
11 | struct i2o_header { | |
12 | u8 version; | |
13 | u8 message_flags; | |
14 | u16 message_size; | |
3110dc7a | 15 | u8 target; |
1da177e4 | 16 | u8 initiator_and_target; |
3110dc7a | 17 | u8 initiator; |
1da177e4 LT |
18 | u8 function; |
19 | u32 initiator_context; | |
20 | }; | |
21 | #pragma pack() | |
22 | ||
23 | #define I2O_HEADER_TEMPLATE \ | |
24 | { .version = 0x01, \ | |
25 | .message_flags = 0x00, \ | |
26 | .function = 0xFF, \ | |
27 | .initiator = 0x00, \ | |
28 | .initiator_and_target = 0x40, \ | |
29 | .target = 0x00, \ | |
30 | .initiator_context = 0x0 } | |
31 | ||
32 | #define I2O_MESSAGE_SIZE 0x1000 | |
33 | #define I2O_COMMAND_SIZE (I2O_MESSAGE_SIZE - sizeof(struct i2o_header)) | |
34 | ||
35 | #pragma pack(1) | |
36 | struct i2o_message { | |
37 | struct i2o_header header; | |
38 | void *data; | |
39 | }; | |
40 | #pragma pack() | |
41 | ||
42 | static inline unsigned short outgoing_message_size(unsigned int data_size) | |
43 | { | |
44 | unsigned int size; | |
45 | unsigned short i2o_size; | |
46 | ||
47 | if (data_size > I2O_COMMAND_SIZE) | |
48 | data_size = I2O_COMMAND_SIZE; | |
49 | ||
50 | size = sizeof(struct i2o_header) + data_size; | |
51 | ||
52 | i2o_size = size / sizeof(u32); | |
3110dc7a | 53 | |
1da177e4 LT |
54 | if (size % sizeof(u32)) |
55 | i2o_size++; | |
56 | ||
57 | return i2o_size; | |
3110dc7a | 58 | } |
1da177e4 LT |
59 | |
60 | static inline u32 incoming_data_size(struct i2o_message *i2o_message) | |
61 | { | |
62 | return (sizeof(u32) * i2o_message->header.message_size); | |
63 | } |