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) 25 struct 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) 50 struct i2o_message { 51 struct i2o_header header; 52 void *data; 53 }; 54 #pragma pack() 55 56 static 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 74 static inline u32 incoming_data_size(struct i2o_message *i2o_message) 75 { 76 return (sizeof(u32) * i2o_message->header.message_size); 77 } 78