/*	$OpenBSD: rf_pq.h,v 1.2 1999/02/16 00:03:10 niklas Exp $	*/
/*	$NetBSD: rf_pq.h,v 1.3 1999/02/05 00:06:15 oster Exp $	*/
/*
 * rf_pq.h
 */
/*
 * Copyright (c) 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Daniel Stodolsky
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#ifndef _RF__RF_PQ_H_
#define _RF__RF_PQ_H_

#include "rf_archs.h"

extern RF_RedFuncs_t rf_pFuncs;
extern RF_RedFuncs_t rf_pRecoveryFuncs;

int     rf_RegularONPFunc(RF_DagNode_t * node);
int     rf_SimpleONPFunc(RF_DagNode_t * node);
int     rf_RecoveryPFunc(RF_DagNode_t * node);
int     rf_RegularPFunc(RF_DagNode_t * node);

#if (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0)

extern RF_RedFuncs_t rf_qFuncs;
extern RF_RedFuncs_t rf_qRecoveryFuncs;
extern RF_RedFuncs_t rf_pqRecoveryFuncs;

void 
rf_PQDagSelect(RF_Raid_t * raidPtr, RF_IoType_t type,
    RF_AccessStripeMap_t * asmap, RF_VoidFuncPtr * createFunc);
RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG);
int     rf_RegularONQFunc(RF_DagNode_t * node);
int     rf_SimpleONQFunc(RF_DagNode_t * node);
RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG);
int     rf_RegularPQFunc(RF_DagNode_t * node);
int     rf_RegularQFunc(RF_DagNode_t * node);
void    rf_Degraded_100_PQFunc(RF_DagNode_t * node);
int     rf_RecoveryQFunc(RF_DagNode_t * node);
int     rf_RecoveryPQFunc(RF_DagNode_t * node);
void    rf_PQ_DegradedWriteQFunc(RF_DagNode_t * node);
void 
rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length,
    unsigned coeff);
void 
rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf,
    unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b);

#endif				/* (RF_INCLUDE_DECL_PQ > 0) ||
				 * (RF_INCLUDE_RAID6 > 0) */

#endif				/* !_RF__RF_PQ_H_ */