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 #pragma pack(1) 11 struct i2o_header { 12 u8 version; 13 u8 message_flags; 14 u16 message_size; 15 u8 target; 16 u8 initiator_and_target; 17 u8 initiator; 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); 53 54 if (size % sizeof(u32)) 55 i2o_size++; 56 57 return i2o_size; 58 } 59 60 static inline u32 incoming_data_size(struct i2o_message *i2o_message) 61 { 62 return (sizeof(u32) * i2o_message->header.message_size); 63 } 64