sys/dev/raidframe/rf_dagfuncs.h

   1 /*      $NetBSD: rf_dagfuncs.h,v 1.9 2005/12/11 12:23:37 christos Exp $ */
   2 /*
   3  * Copyright (c) 1995 Carnegie-Mellon University.
   4  * All rights reserved.
   5  *
   6  * Author: Mark Holland, William V. Courtright II, Jim Zelenka
   7  *
   8  * Permission to use, copy, modify and distribute this software and
   9  * its documentation is hereby granted, provided that both the copyright
  10  * notice and this permission notice appear in all copies of the
  11  * software, derivative works or modified versions, and any portions
  12  * thereof, and that both notices appear in supporting documentation.
  13  *
  14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  17  *
  18  * Carnegie Mellon requests users of this software to return to
  19  *
  20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  21  *  School of Computer Science
  22  *  Carnegie Mellon University
  23  *  Pittsburgh PA 15213-3890
  24  *
  25  * any improvements or extensions that they make and grant Carnegie the
  26  * rights to redistribute these changes.
  27  */
  28
  29 /*****************************************************************************************
  30  *
  31  * dagfuncs.h -- header file for DAG node execution routines
  32  *
  33  ****************************************************************************************/
  34
  35 #ifndef _RF__RF_DAGFUNCS_H_
  36 #define _RF__RF_DAGFUNCS_H_
  37
  38 int     rf_ConfigureDAGFuncs(RF_ShutdownList_t ** listp);
  39 int     rf_TerminateFunc(RF_DagNode_t * node);
  40 int     rf_TerminateUndoFunc(RF_DagNode_t * node);
  41 int     rf_DiskReadMirrorIdleFunc(RF_DagNode_t * node);
  42 int     rf_DiskReadMirrorPartitionFunc(RF_DagNode_t * node);
  43 int     rf_DiskReadMirrorUndoFunc(RF_DagNode_t * node);
  44 int     rf_ParityLogUpdateFunc(RF_DagNode_t * node);
  45 int     rf_ParityLogOverwriteFunc(RF_DagNode_t * node);
  46 int     rf_ParityLogUpdateUndoFunc(RF_DagNode_t * node);
  47 int     rf_ParityLogOverwriteUndoFunc(RF_DagNode_t * node);
  48 int     rf_NullNodeFunc(RF_DagNode_t * node);
  49 int     rf_NullNodeUndoFunc(RF_DagNode_t * node);
  50 int     rf_DiskReadFuncForThreads(RF_DagNode_t * node);
  51 int     rf_DiskWriteFuncForThreads(RF_DagNode_t * node);
  52 int     rf_DiskUndoFunc(RF_DagNode_t * node);
  53 int     rf_GenericWakeupFunc(RF_DagNode_t * node, int status);
  54 int     rf_RegularXorFunc(RF_DagNode_t * node);
  55 int     rf_SimpleXorFunc(RF_DagNode_t * node);
  56 int     rf_RecoveryXorFunc(RF_DagNode_t * node);
  57 int
  58 rf_XorIntoBuffer(RF_Raid_t * raidPtr, RF_PhysDiskAddr_t * pda, char *srcbuf,
  59                  char *targbuf);
  60 int     rf_bxor(char *src, char *dest, int len);
  61 int
  62 rf_longword_bxor(unsigned long *src, unsigned long *dest, int len);
  63 int
  64 rf_longword_bxor3(unsigned long *dest, unsigned long *a, unsigned long *b,
  65                   unsigned long *c, int len, void *bp);
  66 int
  67 rf_bxor3(unsigned char *dst, unsigned char *a, unsigned char *b,
  68     unsigned char *c, unsigned long len, void *bp);
  69
  70 /* function ptrs defined in ConfigureDAGFuncs() */
  71 extern int (*rf_DiskReadFunc) (RF_DagNode_t *);
  72 extern int (*rf_DiskWriteFunc) (RF_DagNode_t *);
  73 extern int (*rf_DiskReadUndoFunc) (RF_DagNode_t *);
  74 extern int (*rf_DiskWriteUndoFunc) (RF_DagNode_t *);
  75 extern int (*rf_SimpleXorUndoFunc) (RF_DagNode_t *);
  76 extern int (*rf_RegularXorUndoFunc) (RF_DagNode_t *);
  77 extern int (*rf_RecoveryXorUndoFunc) (RF_DagNode_t *);
  78
  79 /* macros for manipulating the param[3] in a read or write node */
  80 #define RF_CREATE_PARAM3(pri, wru) (((RF_uint64)(((wru&0xFFFFFF)<<8)|((pri)&0xF)) ))
  81 #define RF_EXTRACT_PRIORITY(_x_)     ((((unsigned) ((unsigned long)(_x_))) >> 0) & 0x0F)
  82 #define RF_EXTRACT_RU(_x_)           ((((unsigned) ((unsigned long)(_x_))) >> 8) & 0xFFFFFF)
  83
  84 #endif                          /* !_RF__RF_DAGFUNCS_H_ */