i2o.h

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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 <[email protected]>
 *
 */

#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);
}