sys/dev/raidframe/rf_desc.h

   1 /*      $NetBSD: rf_desc.h,v 1.19 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
   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 #ifndef _RF__RF_DESC_H_
  30 #define _RF__RF_DESC_H_
  31
  32 #include <dev/raidframe/raidframevar.h>
  33
  34 #include "rf_archs.h"
  35 #include "rf_etimer.h"
  36 #include "rf_dag.h"
  37 #include "rf_layout.h"
  38
  39 struct RF_RaidReconDesc_s {
  40         RF_Raid_t *raidPtr;     /* raid device descriptor */
  41         RF_RowCol_t col;        /* col of failed disk */
  42         RF_RaidDisk_t *spareDiskPtr;    /* describes target disk for recon
  43                                          * (not used in dist sparing) */
  44         int     numDisksDone;   /* the number of surviving disks that have
  45                                  * completed their work */
  46         RF_RowCol_t scol;       /* col ID of the spare disk (not used in dist
  47                                  * sparing) */
  48         /*
  49          * Prevent recon from hogging CPU
  50          */
  51         RF_Etimer_t recon_exec_timer;
  52         RF_uint64 reconExecTimerRunning;
  53         RF_uint64 reconExecTicks;
  54         RF_uint64 maxReconExecTicks;
  55
  56 #if RF_RECON_STATS > 0
  57         RF_uint64 hsStallCount; /* head sep stall count */
  58         RF_uint64 numReconExecDelays;
  59         RF_uint64 numReconEventWaits;
  60 #endif                          /* RF_RECON_STATS > 0 */
  61         RF_RaidReconDesc_t *next;
  62 };
  63
  64 struct RF_RaidAccessDesc_s {
  65         RF_Raid_t *raidPtr;     /* raid device descriptor */
  66         RF_IoType_t type;       /* read or write */
  67         RF_RaidAddr_t raidAddress;      /* starting address in raid address
  68                                          * space */
  69         RF_SectorCount_t numBlocks;     /* number of blocks (sectors) to
  70                                          * transfer */
  71         RF_StripeCount_t numStripes;    /* number of stripes involved in
  72                                          * access */
  73         void *bufPtr;           /* pointer to data buffer */
  74         RF_RaidAccessFlags_t flags;     /* flags controlling operation */
  75         int     state;          /* index into states telling how far along the
  76                                  * RAID operation has gotten */
  77         const RF_AccessState_t *states; /* array of states to be run */
  78         int     status;         /* pass/fail status of the last operation */
  79         int     numRetries;     /* number of times this IO has been attempted */
  80         RF_DagList_t *dagList;  /* list of dag lists, one list per stripe */
  81         RF_VoidPointerListElem_t *iobufs; /* iobufs that need to be cleaned
  82                                              up at the end of this IO */
  83         RF_VoidPointerListElem_t *stripebufs; /* stripe buffers that need to
  84                                                  be cleaned up at the end of
  85                                                  this IO */
  86         RF_AccessStripeMapHeader_t *asmap;      /* the asm for this I/O */
  87         struct buf *bp;         /* buf pointer for this RAID acc */
  88         RF_AccTraceEntry_t tracerec;    /* perf monitoring information for a
  89                                          * user access (not for dag stats) */
  90         void    (*callbackFunc) (RF_CBParam_t); /* callback function for this
  91                                                  * I/O */
  92         void   *callbackArg;    /* arg to give to callback func */
  93         RF_RaidAccessDesc_t *next;
  94         int     async_flag;
  95         RF_Etimer_t timer;      /* used for timing this access */
  96 };
  97 #endif                          /* !_RF__RF_DESC_H_ */