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/*

 * IBM ASM Service Processor Device Driver

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 *

 * Copyright (C) IBM Corporation, 2004

 *

 * Author: Max Asböck <amax@us.ibm.com>

 *

 */

#pragma pack(1)

struct i2o_header {

        u8      version;

        u8      message_flags;

        u16     message_size;

        u8      target;

        u8      initiator_and_target;

        u8      initiator;

        u8      function;

        u32     initiator_context;

};

#pragma pack()

#define I2O_HEADER_TEMPLATE \

      { .version              = 0x01, \

        .message_flags        = 0x00, \

        .function             = 0xFF, \

        .initiator            = 0x00, \

        .initiator_and_target = 0x40, \

        .target               = 0x00, \

        .initiator_context    = 0x0 }

#define I2O_MESSAGE_SIZE        0x1000

#define I2O_COMMAND_SIZE        (I2O_MESSAGE_SIZE - sizeof(struct i2o_header))

#pragma pack(1)

struct i2o_message {

        struct i2o_header       header;

        void                    *data;

};

#pragma pack()

static inline unsigned short outgoing_message_size(unsigned int data_size)

{

        unsigned int size;

        unsigned short i2o_size;

        if (data_size > I2O_COMMAND_SIZE)

                data_size = I2O_COMMAND_SIZE;

        size = sizeof(struct i2o_header) + data_size;

        i2o_size = size / sizeof(u32);

        if (size % sizeof(u32))

               i2o_size++;

        return i2o_size;

}

static inline u32 incoming_data_size(struct i2o_message *i2o_message)

{

        return (sizeof(u32) * i2o_message->header.message_size);

}