sys/dev/raidframe/rf_pq.h

   1 /*      $NetBSD: rf_pq.h,v 1.3.42.1 2005/03/04 16:50:07 skrll Exp $     */
   2 /*
   3  * rf_pq.h
   4  */
   5 /*
   6  * Copyright (c) 1995 Carnegie-Mellon University.
   7  * All rights reserved.
   8  *
   9  * Author: Daniel Stodolsky
  10  *
  11  * Permission to use, copy, modify and distribute this software and
  12  * its documentation is hereby granted, provided that both the copyright
  13  * notice and this permission notice appear in all copies of the
  14  * software, derivative works or modified versions, and any portions
  15  * thereof, and that both notices appear in supporting documentation.
  16  *
  17  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  18  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  19  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  20  *
  21  * Carnegie Mellon requests users of this software to return to
  22  *
  23  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  24  *  School of Computer Science
  25  *  Carnegie Mellon University
  26  *  Pittsburgh PA 15213-3890
  27  *
  28  * any improvements or extensions that they make and grant Carnegie the
  29  * rights to redistribute these changes.
  30  */
  31
  32 #ifndef _RF__RF_PQ_H_
  33 #define _RF__RF_PQ_H_
  34
  35 #include "rf_archs.h"
  36
  37 extern RF_RedFuncs_t rf_pFuncs;
  38 extern RF_RedFuncs_t rf_pRecoveryFuncs;
  39
  40 int     rf_RegularONPFunc(RF_DagNode_t * node);
  41 int     rf_SimpleONPFunc(RF_DagNode_t * node);
  42 int     rf_RecoveryPFunc(RF_DagNode_t * node);
  43 int     rf_RegularPFunc(RF_DagNode_t * node);
  44
  45 #if (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0)
  46
  47 extern RF_RedFuncs_t rf_qFuncs;
  48 extern RF_RedFuncs_t rf_qRecoveryFuncs;
  49 extern RF_RedFuncs_t rf_pqRecoveryFuncs;
  50
  51 void
  52 rf_PQDagSelect(RF_Raid_t * raidPtr, RF_IoType_t type,
  53     RF_AccessStripeMap_t * asmap, RF_VoidFuncPtr * createFunc);
  54 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG);
  55 int     rf_RegularONQFunc(RF_DagNode_t * node);
  56 int     rf_SimpleONQFunc(RF_DagNode_t * node);
  57 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG);
  58 int     rf_RegularPQFunc(RF_DagNode_t * node);
  59 int     rf_RegularQFunc(RF_DagNode_t * node);
  60 void    rf_Degraded_100_PQFunc(RF_DagNode_t * node);
  61 int     rf_RecoveryQFunc(RF_DagNode_t * node);
  62 int     rf_RecoveryPQFunc(RF_DagNode_t * node);
  63 void    rf_PQ_DegradedWriteQFunc(RF_DagNode_t * node);
  64 void
  65 rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length,
  66     unsigned coeff);
  67 void
  68 rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf,
  69     unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b);
  70
  71 #endif                          /* (RF_INCLUDE_DECL_PQ > 0) ||
  72                                  * (RF_INCLUDE_RAID6 > 0) */
  73
  74 #endif                          /* !_RF__RF_PQ_H_ */