64 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * IBM ASM Service Processor Device Driver4 *5 * Copyright (C) IBM Corporation, 20046 *7 * Author: Max Asböck <amax@us.ibm.com>8 */9 10#pragma pack(1)11struct 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 0x100033#define I2O_COMMAND_SIZE (I2O_MESSAGE_SIZE - sizeof(struct i2o_header))34 35#pragma pack(1)36struct i2o_message {37 struct i2o_header header;38 void *data;39};40#pragma pack()41 42static 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 60static inline u32 incoming_data_size(struct i2o_message *i2o_message)61{62 return (sizeof(u32) * i2o_message->header.message_size);63}64