1 /* $NetBSD: rf_desc.h,v 1.6 2001/10/04 15:58:52 oster 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 38 struct RF_RaidReconDesc_s { 39 RF_Raid_t *raidPtr; /* raid device descriptor */ 40 RF_RowCol_t row; /* row of failed disk */ 41 RF_RowCol_t col; /* col of failed disk */ 42 int state; /* how far along the reconstruction operation 43 * has gotten */ 44 RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon 45 * (not used in dist sparing) */ 46 int numDisksDone; /* the number of surviving disks that have 47 * completed their work */ 48 RF_RowCol_t srow; /* row ID of the spare disk (not used in dist 49 * sparing) */ 50 RF_RowCol_t scol; /* col ID of the spare disk (not used in dist 51 * sparing) */ 52 /* 53 * Prevent recon from hogging CPU 54 */ 55 RF_Etimer_t recon_exec_timer; 56 RF_uint64 reconExecTimerRunning; 57 RF_uint64 reconExecTicks; 58 RF_uint64 maxReconExecTicks; 59 60 #if RF_RECON_STATS > 0 61 RF_uint64 hsStallCount; /* head sep stall count */ 62 RF_uint64 numReconExecDelays; 63 RF_uint64 numReconEventWaits; 64 #endif /* RF_RECON_STATS > 0 */ 65 RF_RaidReconDesc_t *next; 66 }; 67 68 struct RF_RaidAccessDesc_s { 69 RF_Raid_t *raidPtr; /* raid device descriptor */ 70 RF_IoType_t type; /* read or write */ 71 RF_RaidAddr_t raidAddress; /* starting address in raid address 72 * space */ 73 RF_SectorCount_t numBlocks; /* number of blocks (sectors) to 74 * transfer */ 75 RF_StripeCount_t numStripes; /* number of stripes involved in 76 * access */ 77 caddr_t bufPtr; /* pointer to data buffer */ 78 RF_RaidAccessFlags_t flags; /* flags controlling operation */ 79 int state; /* index into states telling how far along the 80 * RAID operation has gotten */ 81 RF_AccessState_t *states; /* array of states to be run */ 82 int status; /* pass/fail status of the last operation */ 83 RF_DagList_t *dagArray; /* array of dag lists, one list per stripe */ 84 RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */ 85 void *bp; /* buf pointer for this RAID acc. ignored 86 * outside the kernel */ 87 RF_DagHeader_t **paramDAG; /* allows the DAG to be returned to 88 * the caller after I/O completion */ 89 RF_AccessStripeMapHeader_t **paramASM; /* allows the ASM to be 90 * returned to the caller 91 * after I/O completion */ 92 RF_AccTraceEntry_t tracerec; /* perf monitoring information for a 93 * user access (not for dag stats) */ 94 void (*callbackFunc) (RF_CBParam_t); /* callback function for this 95 * I/O */ 96 void *callbackArg; /* arg to give to callback func */ 97 98 RF_AllocListElem_t *cleanupList; /* memory to be freed at the 99 * end of the access */ 100 101 RF_RaidAccessDesc_t *next; 102 RF_RaidAccessDesc_t *head; 103 104 int numPending; 105 106 RF_DECLARE_MUTEX(mutex) /* these are used to implement 107 * blocking I/O */ 108 RF_DECLARE_COND(cond) 109 int async_flag; 110 111 RF_Etimer_t timer; /* used for timing this access */ 112 }; 113 #endif /* !_RF__RF_DESC_H_ */ 114