/*
 * HvLpEvent.h
 * Copyright (C) 2001  Mike Corrigan IBM Corporation
 *
 * 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
 */

/* This file contains the class for HV events in the system. */

#ifndef _HVLPEVENT_H
#define _HVLPEVENT_H

#include <asm/types.h>
#include <asm/ptrace.h>
#include <asm/iSeries/HvTypes.h>
#include <asm/iSeries/HvCallEvent.h>

//=====================================================================
//
// HvLpEvent is the structure for Lp Event messages passed between
// partitions through PLIC. 
//
//=====================================================================

struct HvEventFlags
{
	__u8	xValid:1;		// Indicates a valid request	x00-x00
	__u8	xRsvd1:4;		// Reserved			...
	__u8	xAckType:1;		// Immediate or deferred	...
	__u8	xAckInd:1;		// Indicates if ACK required	...
	__u8	xFunction:1;		// Interrupt or Acknowledge	...
};


struct HvLpEvent
{
	struct HvEventFlags xFlags;	// Event flags			x00-x00
	__u8	xType;			// Type of message		x01-x01
	__u16	xSubtype;		// Subtype for event		x02-x03
	__u8	xSourceLp;		// Source LP			x04-x04
	__u8	xTargetLp;		// Target LP			x05-x05
	__u8	xSizeMinus1;		// Size of Derived class - 1	x06-x06
	__u8	xRc;			// RC for Ack flows		x07-x07
	__u16	xSourceInstanceId;	// Source sides instance id	x08-x09
	__u16	xTargetInstanceId;	// Target sides instance id	x0A-x0B
	union {
		__u32	xSubtypeData;	// Data usable by the subtype	x0C-x0F
		__u16	xSubtypeDataShort[2];	// Data as 2 shorts
		__u8	xSubtypeDataChar[4];	// Data as 4 chars
	} x;

	__u64	xCorrelationToken;	// Unique value for source/type x10-x17
};

// Lp Event handler function
typedef void (*LpEventHandler)(struct HvLpEvent *, struct pt_regs *);

// Register a handler for an event type
//  returns 0 on success
extern int HvLpEvent_registerHandler( HvLpEvent_Type eventType, LpEventHandler hdlr);

// Unregister a handler for an event type
//  This call will sleep until the handler being removed is guaranteed to
//  be no longer executing on any CPU. Do not call with locks held.
//
//  returns 0 on success
//  Unregister will fail if there are any paths open for the type
extern int HvLpEvent_unregisterHandler( HvLpEvent_Type eventType );

// Open an Lp Event Path for an event type
//  returns 0 on success
//  openPath will fail if there is no handler registered for the event type.
//  The lpIndex specified is the partition index for the target partition
//  (for VirtualIo, VirtualLan and SessionMgr) other types specify zero) 
extern int HvLpEvent_openPath( HvLpEvent_Type eventType, HvLpIndex lpIndex );


// Close an Lp Event Path for a type and partition
//  returns 0 on sucess
extern int HvLpEvent_closePath( HvLpEvent_Type eventType, HvLpIndex lpIndex );

#define HvLpEvent_Type_Hypervisor 0
#define HvLpEvent_Type_MachineFac 1
#define HvLpEvent_Type_SessionMgr 2
#define HvLpEvent_Type_SpdIo      3
#define HvLpEvent_Type_VirtualBus 4
#define HvLpEvent_Type_PciIo      5
#define HvLpEvent_Type_RioIo      6
#define HvLpEvent_Type_VirtualLan 7
#define HvLpEvent_Type_VirtualIo  8
#define HvLpEvent_Type_NumTypes   9

#define HvLpEvent_Rc_Good 0
#define HvLpEvent_Rc_BufferNotAvailable 1
#define HvLpEvent_Rc_Cancelled 2
#define HvLpEvent_Rc_GenericError 3
#define HvLpEvent_Rc_InvalidAddress 4
#define HvLpEvent_Rc_InvalidPartition 5
#define HvLpEvent_Rc_InvalidSize 6
#define HvLpEvent_Rc_InvalidSubtype 7
#define HvLpEvent_Rc_InvalidSubtypeData 8
#define HvLpEvent_Rc_InvalidType 9
#define HvLpEvent_Rc_PartitionDead 10
#define HvLpEvent_Rc_PathClosed 11
#define HvLpEvent_Rc_SubtypeError 12

#define HvLpEvent_Function_Ack 0
#define HvLpEvent_Function_Int 1

#define HvLpEvent_AckInd_NoAck 0
#define HvLpEvent_AckInd_DoAck 1

#define HvLpEvent_AckType_ImmediateAck 0
#define HvLpEvent_AckType_DeferredAck 1

#define HvLpDma_Direction_LocalToRemote 0
#define HvLpDma_Direction_RemoteToLocal 1

#define HvLpDma_AddressType_TceIndex 0
#define HvLpDma_AddressType_RealAddress 1

#define HvLpDma_Rc_Good 0
#define HvLpDma_Rc_Error 1
#define HvLpDma_Rc_PartitionDead 2
#define HvLpDma_Rc_PathClosed 3
#define HvLpDma_Rc_InvalidAddress 4
#define HvLpDma_Rc_InvalidLength 5

#endif /* _HVLPEVENT_H */
