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/*
 * ipmi.h
 *
 * MontaVista IPMI interface
 *
 * Author: MontaVista Software, Inc.
 *         Corey Minyard <minyard@mvista.com>
 *         source@mvista.com
 *
 * Copyright 2002 MontaVista Software Inc.
 *
 *  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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __LINUX_IPMI_H
#define __LINUX_IPMI_H

#include <linux/ipmi_msgdefs.h>
#include <linux/compiler.h>

/*
 * This file describes an interface to an IPMI driver.  You have to
 * have a fairly good understanding of IPMI to use this, so go read
 * the specs first before actually trying to do anything.
 *
 * With that said, this driver provides a multi-user interface to the
 * IPMI driver, and it allows multiple IPMI physical interfaces below
 * the driver.  The physical interfaces bind as a lower layer on the
 * driver.  They appear as interfaces to the application using this
 * interface.
 *
 * Multi-user means that multiple applications may use the driver,
 * send commands, receive responses, etc.  The driver keeps track of
 * commands the user sends and tracks the responses.  The responses
 * will go back to the application that send the command.  If the
 * response doesn't come back in time, the driver will return a
 * timeout error response to the application.  Asynchronous events
 * from the BMC event queue will go to all users bound to the driver.
 * The incoming event queue in the BMC will automatically be flushed
 * if it becomes full and it is queried once a second to see if
 * anything is in it.  Incoming commands to the driver will get
 * delivered as commands.
 *
 * This driver provides two main interfaces: one for in-kernel
 * applications and another for userland applications.  The
 * capabilities are basically the same for both interface, although
 * the interfaces are somewhat different.  The stuff in the
 * #ifdef KERNEL below is the in-kernel interface.  The userland
 * interface is defined later in the file.  */



/*
 * This is an overlay for all the address types, so it's easy to
 * determine the actual address type.  This is kind of like addresses
 * work for sockets.
 */
#define IPMI_MAX_ADDR_SIZE 32
struct ipmi_addr
{
	 /* Try to take these from the "Channel Medium Type" table
	    in section 6.5 of the IPMI 1.5 manual. */
	int   addr_type;
	short channel;
	char  data[IPMI_MAX_ADDR_SIZE];
};

/*
 * When the address is not used, the type will be set to this value.
 * The channel is the BMC's channel number for the channel (usually
 * 0), or IPMC_BMC_CHANNEL if communicating directly with the BMC.
 */
#define IPMI_SYSTEM_INTERFACE_ADDR_TYPE	0x0c
struct ipmi_system_interface_addr
{
	int           addr_type;
	short         channel;
	unsigned char lun;
};

/* An IPMB Address. */
#define IPMI_IPMB_ADDR_TYPE		0x01
/* Used for broadcast get device id as described in section 17.9 of the
   IPMI 1.5 manual. */ 
#define IPMI_IPMB_BROADCAST_ADDR_TYPE	0x41
struct ipmi_ipmb_addr
{
	int           addr_type;
	short         channel;
	unsigned char slave_addr;
	unsigned char lun;
};

/*
 * A LAN Address.  This is an address to/from a LAN interface bridged
 * by the BMC, not an address actually out on the LAN.
 *
 * A concious decision was made here to deviate slightly from the IPMI
 * spec.  We do not use rqSWID and rsSWID like it shows in the
 * message.  Instead, we use remote_SWID and local_SWID.  This means
 * that any message (a request or response) from another device will
 * always have exactly the same address.  If you didn't do this,
 * requests and responses from the same device would have different